Service Manual
SiBE281013
Service
Manual
GQI-Eco Series
Heat Pump R-410A 50Hz
RZQG71~140LV1B
SiBE281013
GQI-Eco Series
Heat Pump
R-410A 50Hz
1. Introduction ............................................................................................ iv
1.1 Safety Cautions ....................................................................................... iv
1.2 Used Icons ............................................................................................ viii
1.3 Preface .................................................................................................... ix
Part 1 General Information ........................................................... 1
1. Model Names of Indoor / Outdoor Units..................................................2
2. External Appearance...............................................................................3
Part 2 Functions ............................................................................ 4
1. Functions.................................................................................................5
1.1 Indoor Unit................................................................................................5
1.2 Outdoor Unit .............................................................................................5
Part 3 Specifications .................................................................... 6
1. Specifications ..........................................................................................7
Part 4 Remote Controller .............................................................. 9
1. Wired Remote Controller.......................................................................10
1.1
1.2
1.3
1.4
Applicable Models ..................................................................................10
Names and Functions ............................................................................11
MAIN/SUB Setting when Using 2 Remote Controllers ...........................15
Centralized Control Group No. Setting...................................................16
2. Wireless Remote Controller ..................................................................18
2.1 Applicable Models ..................................................................................18
2.2 Names and Functions ............................................................................18
2.3 MAIN/SUB Setting..................................................................................20
3. Service Mode ........................................................................................21
3.1 BRC1D528 .............................................................................................21
4. Inspection Mode....................................................................................23
4.1 BRC1D528 .............................................................................................23
Part 5 Function and Control........................................................ 24
1. Function of Main Components and Thermistors ...................................25
2. Operation Flow Chart ............................................................................27
2.1 Cooling / Dry Operation..........................................................................27
2.2 Heating Operation ..................................................................................28
3. Function Details ....................................................................................29
3.1 Indoor Unit..............................................................................................29
i
Table of Contents
SiBE281013
3.2 Outdoor Unit ...........................................................................................33
Part 6 Field Setting ..................................................................... 49
1. Test Operation ......................................................................................50
1.1
1.2
1.3
1.4
1.5
Pre-run Checks ......................................................................................50
Remote Controller Confirmation.............................................................50
Test Run.................................................................................................51
Precautions Regarding Test Run ...........................................................51
Failure Diagnosis at the Moment of First Installation .............................52
2. Field Setting from Remote Controller....................................................53
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
Wired Remote Controller........................................................................53
Wireless Remote Controller ...................................................................56
Settings Contents and Code No. for Indoor Units ..................................57
Overview of the Field Setting on the Outdoor Units ...............................62
Quiet (Low Noise) Operation..................................................................63
I-Demand Function.................................................................................65
Setting for Low Humidity Application......................................................66
Defrost Start Setting ...............................................................................70
3. Field Setting from Outdoor Unit PCB ....................................................71
3.1 Location of DIP Switch and BS Button ...................................................71
3.2 Field Setting for Outdoor Unit.................................................................72
4. Emergency Operation ...........................................................................77
4.1 Forced Operation ...................................................................................77
Part 7 Service Diagnosis............................................................. 79
1. Maintenance Inspection ........................................................................81
1.1 Overview ................................................................................................81
2. Symptom-based Troubleshooting .........................................................83
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
2.12
Overview ................................................................................................83
Equipment does not Operate .................................................................84
Indoor Unit Fan Operates, but Compressor does not Operate ..............86
Cooling / Heating Operation Starts but Stops Immediately ....................88
After Unit Shuts Down, It cannot be Restarted for a While ....................89
Equipment Operates but does not Provide Cooling ...............................91
Equipment Operates but does not Provide Heating ...............................93
Equipment Discharges White Mist .........................................................95
Equipment Produces Loud Noise or Vibration .......................................96
Equipment Discharges Dust...................................................................97
Remote Controller LCD Displays "88" ....................................................98
Swing Flap does not Operate.................................................................99
3. Troubleshooting by LED Indications ...................................................101
3.1 Troubleshooting by LED on the Indoor Unit .........................................101
3.2 Troubleshooting by LED on Outdoor Unit PCB ....................................101
4. Troubleshooting by Remote Controller ...............................................102
4.1
4.2
4.3
4.4
4.5
4.6
Table of Contents
Procedure of Self-diagnosis by Remote Controller ..............................102
Error Codes and Description ................................................................106
Safety Devices .....................................................................................107
Indoor Unit PCB Abnormality ...............................................................108
Drain Water Level System Abnormality................................................109
Indoor Unit Fan Motor Abnormality ......................................................111
ii
SiBE281013
4.7
4.8
4.9
4.10
4.11
4.12
4.13
4.14
4.15
4.16
4.17
4.18
4.19
4.20
4.21
4.22
4.23
4.24
4.25
4.26
4.27
4.28
4.29
4.30
4.31
4.32
4.33
4.34
4.35
4.36
4.37
4.38
4.39
Capacity Setting Abnormality ...............................................................112
Transmission Error (between Indoor Unit PCB and Adaptor PCB) ......113
Thermistor Abnormality ........................................................................115
Humidity Sensor System Abnormality ..................................................116
Remote Controller Thermistor Abnormality ..........................................117
Outdoor Unit PCB Abnormality.............................................................118
High Pressure Abnormality (Detected by the High Pressure Switch)...119
Actuation of Pressure Sensor...............................................................123
Compressor Motor Lock .......................................................................125
Outdoor Unit Fan Motor Abnormality....................................................126
Electronic Expansion Valve Abnormality..............................................128
Discharge Pipe Temperature Control...................................................131
High Pressure Switch System Abnormality ..........................................133
Thermistor System Abnormality ...........................................................134
Outdoor Unit PCB Abnormality.............................................................135
Radiation Fin Temperature Rise ..........................................................137
Output Overcurrent Detection ..............................................................139
Electronic Thermal (Time Lag) .............................................................141
Stall Prevention (Time Lag)..................................................................143
Transmission System Abnormality
(between Control and Inverter PCB) ....................................................145
Open Phase or Power Supply Voltage Imbalance ...............................146
Defective Capacity Setting ...................................................................147
Refrigerant Shortage (Alert) .................................................................148
Refrigerant Shortage (Error).................................................................149
Power Supply Voltage Abnormality ......................................................151
Transmission Error between Indoor and Outdoor Unit.........................153
Transmission Error Between Remote Controller and Indoor Unit ........156
Transmission Error between MAIN Remote Controller and
SUB Remote Controller........................................................................157
Field Setting Switch Abnormality..........................................................158
“UC” Address Duplication of Centralized Controller ...............................160
Transmission Error Between Centralized Controller and
Indoor Unit............................................................................................161
Transmission Error between Indoor and Outdoor Unit /
Piping and Wiring Mismatch / Refrigerant Shortage ............................163
Check ...................................................................................................165
Part 8 Appendix......................................................................... 178
1. Piping Diagrams..................................................................................179
1.1 RZQG71LV1B ......................................................................................179
1.2 RZQG100-140LV1B .............................................................................179
2. Wiring Diagrams..................................................................................180
2.1 Indoor Unit............................................................................................180
2.2 Outdoor Unit .........................................................................................181
3. Precautions for New Refrigerant (R-410A) .........................................182
3.1 Outline ..................................................................................................182
3.2 Refrigerant Cylinders............................................................................184
3.3 Service Tools........................................................................................185
iii
Table of Contents
SiBE281013
Introduction
1. Introduction
1.1
Safety Cautions
Cautions and
Warnings
„ Be sure to read the following safety cautions before conducting repair work.
Warning” and “
Caution”. The “
„ The caution items are classified into “
Warning”
items are especially important since they can lead to death or serious injury if they are not
followed closely. The “
Caution” items can also lead to serious accidents under some
conditions if they are not followed. Therefore, be sure to observe all the safety caution items
described below.
„ About the pictograms
This symbol indicates the item for which caution must be exercised.
The pictogram shows the item to which attention must be paid.
This symbol indicates the prohibited action.
The prohibited item or action is shown in the illustration or near the symbol.
This symbol indicates the action that must be taken, or the instruction.
The instruction is shown in the illustration or near the symbol.
„ After the repair work is complete, be sure to conduct a test operation to ensure that the
equipment operates normally, and explain the cautions for operating the product to the
customer.
1.1.1 Cautions Regarding Safety of Workers
Warning
Be sure to disconnect the power cable plug from the plug socket before
disassembling the equipment for repair.
Working on the equipment that is connected to the power supply may cause an
electrical shock.
If it is necessary to supply power to the equipment to conduct the repair or
inspecting the circuits, do not touch any electrically charged sections of the
equipment.
If the refrigerant gas is discharged during the repair work, do not touch the
discharged refrigerant gas.
The refrigerant gas may cause frostbite.
When disconnecting the suction or discharge pipe of the compressor at the
welded section, evacuate the refrigerant gas completely at a well-ventilated
place first.
If there is a gas remaining inside the compressor, the refrigerant gas or
refrigerating machine oil discharges when the pipe is disconnected, and it may
cause injury.
If the refrigerant gas leaks during the repair work, ventilate the area. The
refrigerant gas may generate toxic gases when it contacts flames.
The step-up capacitor supplies high-voltage electricity to the electrical
components of the outdoor unit.
Be sure to discharge the capacitor completely before conducting repair work.
A charged capacitor may cause an electrical shock.
Do not start or stop the air conditioner operation by plugging or unplugging the
power cable plug.
Plugging or unplugging the power cable plug to operate the equipment may
cause an electrical shock or fire.
iv
Introduction
SiBE281013
Warning
Be sure to wear a safety helmet, gloves, and a safety belt when working at a
high place (more than 2 m). Insufficient safety measures may cause a fall
accident.
In case of R-410A refrigerant models, be sure to use pipes, flare nuts and tools
for the exclusive use of the R-410A refrigerant.
The use of materials for R-22 refrigerant models may cause a serious accident
such as a damage of refrigerant cycle as well as an equipment failure.
Caution
Do not repair the electrical components with wet hands.
Working on the equipment with wet hands may cause an electrical shock.
Do not clean the air conditioner by splashing water.
Washing the unit with water may cause an electrical shock.
Be sure to provide the grounding when repairing the equipment in a humid or
wet place, to avoid electrical shocks.
Be sure to turn off the power switch and unplug the power cable when cleaning
the equipment.
The internal fan rotates at a high speed, and cause injury.
Be sure to conduct repair work with appropriate tools.
The use of inappropriate tools may cause injury.
Be sure to check that the refrigerating cycle section has cooled down enough
before conducting repair work.
Working on the unit when the refrigerating cycle section is hot may cause
burns.
Use the welder in a well-ventilated place.
Using the welder in an enclosed room may cause oxygen deficiency.
v
SiBE281013
Introduction
1.1.2 Cautions Regarding Safety of Users
Warning
Be sure to use parts listed in the service parts list of the applicable model and
appropriate tools to conduct repair work. Never attempt to modify the
equipment.
The use of inappropriate parts or tools may cause an electrical shock,
excessive heat generation or fire.
If the power cable and lead wires have scratches or deteriorated, be sure to
replace them.
Damaged cable and wires may cause an electrical shock, excessive heat
generation or fire.
Do not use a joined power cable or extension cable, or share the same power
outlet with other electrical appliances, since it may cause an electrical shock,
excessive heat generation or fire.
Be sure to use an exclusive power circuit for the equipment, and follow the local
technical standards related to the electrical equipment, the internal wiring
regulations, and the instruction manual for installation when conducting
electrical work.
Insufficient power circuit capacity and improper electrical work may cause an
electrical shock or fire.
Be sure to use the specified cable for wiring between the indoor and outdoor
units. Make the connections securely and route the cable properly so that there
is no force pulling the cable at the connection terminals.
Improper connections may cause excessive heat generation or fire.
When wiring between the indoor and outdoor units, make sure that the terminal
cover does not lift off or dismount because of the cable.
If the cover is not mounted properly, the terminal connection section may cause
an electrical shock, excessive heat generation or fire.
Do not damage or modify the power cable.
Damaged or modified power cable may cause an electrical shock or fire.
Placing heavy items on the power cable, and heating or pulling the power cable
may damage the cable.
Do not mix air or gas other than the specified refrigerant (R-410A / R-22) in the
refrigerant system.
If air enters the refrigerating system, an excessively high pressure results,
causing equipment damage and injury.
If the refrigerant gas leaks, be sure to locate the leaking point and repair it
before charging the refrigerant. After charging refrigerant, make sure that there
is no refrigerant leak.
If the leaking point cannot be located and the repair work must be stopped, be
sure to perform pump-down and close the service valve, to prevent the
refrigerant gas from leaking into the room. The refrigerant gas itself is
harmless, but it may generate toxic gases when it contacts flames, such as fan
and other heaters, stoves and ranges.
When relocating the equipment, make sure that the new installation site has
sufficient strength to withstand the weight of the equipment.
If the installation site does not have sufficient strength and if the installation
work is not conducted securely, the equipment may fall and cause injury.
vi
Introduction
SiBE281013
Warning
Check to make sure that the power cable plug is not dirty or loose, then insert
the plug into a power outlet securely.
If the plug has dust or loose connection, it may cause an electrical shock or fire.
Be sure to install the product correctly by using the provided standard
For unitary type
installation frame.
only
Incorrect use of the installation frame and improper installation may cause the
equipment to fall, resulting in injury.
Be sure to install the product securely in the installation frame mounted on the For unitary type
window frame.
only
If the unit is not securely mounted, it may fall and cause injury.
When replacing the coin battery in the remote controller, be sure to disposed
of the old battery to prevent children from swallowing it.
If a child swallows the coin battery, see a doctor immediately.
Caution
Installation of a leakage breaker is necessary in some cases depending on the
conditions of the installation site, to prevent electrical shocks.
Do not install the equipment in a place where there is a possibility of
combustible gas leaks.
If the combustible gas leaks and remains around the unit, it may cause a fire.
Check to see if the parts and wires are mounted and connected properly, and
if the connections at the soldered or crimped terminals are secure.
Improper installation and connections may cause excessive heat generation,
fire or an electrical shock.
If the installation platform or frame has corroded, replace it.
Corroded installation platform or frame may cause the unit to fall, resulting in
injury.
Check the grounding, and repair it if the equipment is not properly grounded.
Improper grounding may cause an electrical shock.
vii
SiBE281013
Introduction
Caution
Be sure to measure the insulation resistance after the repair, and make sure
that the resistance is 1 MΩ or higher.
Faulty insulation may cause an electrical shock.
Be sure to check the drainage of the indoor unit after the repair.
Faulty drainage may cause the water to enter the room and wet the furniture
and floor.
Do not tilt the unit when removing it.
The water inside the unit may spill and wet the furniture and floor.
Be sure to install the packing and seal on the installation frame properly.
For unitary type
If the packing and seal are not installed properly, water may enter the room and only
wet the furniture and floor.
1.2
Used Icons
Icons are used to attract the attention of the reader to specific information. The meaning of each
icon is described in the table below:
Icon
Type of
Information
Description
Note
A “note” provides information that is not indispensable, but may
nevertheless be valuable to the reader, such as tips and tricks.
Caution
A “caution” is used when there is danger that the reader, through
incorrect manipulation, may damage equipment, loose data, get
an unexpected result or has to restart (part of) a procedure.
Warning
A “warning” is used when there is danger of personal injury.
Reference
A “reference” guides the reader to other places in this binder or
in this manual, where he/she will find additional information on a
specific topic.
Note:
Caution
Warning
viii
Introduction
1.3
SiBE281013
Preface
Thank you for your continued patronage of Daikin products.
This is the new service manual for Daikin's Year 2010 RZQG-L series Heat Pump System.
Daikin offers a wide range of models to respond to building and office air conditioning needs.
We are confident that customers will be able to find the models that best suit their needs.
This service manual contains information regarding the servicing of RZQG-L series R-410A
Heat Pump System.
November, 2010
After Sales Service Division
ix
SiBE281013
Part 1
General Information
1. Model Names of Indoor / Outdoor Units..................................................2
2. External Appearance...............................................................................3
General Information
1
Model Names of Indoor / Outdoor Units
SiBE281013
1. Model Names of Indoor / Outdoor Units
Model Series
Indoor Unit
Ceiling Mounted Cassette Type
Ceiling Suspended Type
Note:
2
Outdoor Unit
FCQG71EVEB
FCQG100EVEB
RZQG71LV1B
RZQG100LV1B
FCQG125EVEB
FCQG140EVEB
RZQG125LV1B
RZQG140LV1B
FHQG71CVEB
FHQG100CVEB
RZQG71LV1B
RZQG100LV1B
FHQG125CVEB
FHQG140CVEB
RZQG125LV1B
RZQG140LV1B
Power Supply
1 phase, 220-240V, 50Hz
1. Power supply intake: Outdoor unit
General Information
SiBE281013
External Appearance
2. External Appearance
Indoor Units
FCQG-E
FHQG-C
BRC1D528
BRC1E51A7
Wired Remote Controller
Wireless Remote Controller
BRC7G63
Outdoor Units
RZQG71LV1B
General Information
RZQG100·125·140LV1B
3
SiBE281013
Part 2
Functions
1. Functions.................................................................................................5
1.1 Indoor Unit................................................................................................5
1.2 Outdoor Unit .............................................................................................5
4
Functions
SiBE281013
Functions
1. Functions
1.1
Indoor Unit
Items
Features
Control
Auto swing
Swing pattern selection
Switchable fan speed
Program “Dry”
High ceiling application
Two selectable
Wired type
thermo. sensors
Wireless type
Hot start
Timer selector
Mould
Mould resistant treatment for filter
prevention Mould-proofing drain pan
Work &
Drain water lift-up mechanism
servicing
Pre-charged for up to 30 m
Long-life filter
Filter sign
Ceiling soiling prevention
Emergency operation
Self-diagnosis function
Control
Auto-restart
features
Auto cooling/heating change-over
Control by 2 remote controllers
Control by 1 remote controller
External command control
Centralized remote control
Option
Interlock control
Fresh air intake kit
FCQG-E
Heat Pump
{
{
{
{
{
{
—
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
FHQG-C
Heat Pump
{
{
{
{
{(*1)
{
{
{
{
{
{
{
{
{
{
—
{
{
{
{
{
{
{
{
{
—
Note:
{ : Functions exist.
— : No functions
*1 : FHQG71C Installable on max. 3.5m high ceiling
FHQG100~140C Installable on max. 4.3m high ceiling
1.2
Outdoor Unit
Items
Control
Functions
Inverter Control
(For Comfortable Air Conditioning)
Night Time Quiet Operation Function for Cooling
EDP Room Applicable
Low Gas Pressure Detection
Work &
Servicing
Operation
Range
Wide Operation Range
Others
PE Fin for Outdoor Unit
Cooling
Heating
RZQG71L
RZQG100/125/140L
{
{
{
{
–15~50°CDB
–20~15.5°CWB
{
Note:
{ : Functions exist.
— : No functions
Functions
5
SiBE281013
Part 3
Specifications
1. Specifications ..........................................................................................7
6
Specifications
SiBE281013
Specifications
1. Specifications
FCQG (Ceiling Mounted Cassette Type - Round Flow -)
Model
Indoor unit
Outdoor unit
FCQG71EVEB
RZQG71LV1B
Power Supply
Cooling capacity ∗1
Heating capacity ∗1
Cooling input ∗1
Heating input ∗1
EER
COP
SEER (by Feb-2010-Tool)
SCOP (Bivalent point-4°C)
Indoor unit
Colour
Dimensions H×W×D
Type
Coil
Row×Stages×Fin pitch
Face area
Model
Type
Fan
Motor output
AFR
Air filter
Mass
Sound pressure (H/M/L)
Sound power
Liquid
Piping
Connections Gas
Drain
Wired
Remote controller (option)
Wireless
Model
Decoration Colour
panel
Dimensions H×W×D
(option)
Air filter
Mass
Outdoor unit
Colour
Dimensions H×W×D
Type
Coil
Row×Stages×Fin pitch
Face area
Model
Comp.
Fan
kW
Btu/h
kcal/h
kW
Btu/h
kcal/h
kW
kW
—
—
—
—
mm
m²
W
m³/min
36/33/29
53
mm
kg
RZQG71LV1B
mm
m²
kW
990×940×320
2×44×1.4
0.884
2YC63FXD#D∗
Hermetically sealed swing
type
1.62
P51J11F×1
W
m³/min
kg
dB
dB
mm
mm
mm
94
59
77
48/50
64
2.90
P51J11F×2
3.60
94+94
114
99
50/52
66
%
m
m
50 (Equivalent Length 70m)
kg
3.5 (Charged for 30m)
FVC50K
0.9
L
51/53
67
68
φ 9.5 (Flare)
φ 15.9 (Flare)
φ 26.0 (Hole)
High Pressure Switch, Fuse
100-0
Electronic Expansion Valve
75 (Equivalent Length 90m)
30
R-410A
4.0 (Charged for 30m)
FV50S
1.3
C: 3D069662C
∗1. The above data based on the conditions shown in the table below.
Cooling
Indoor : 27°CDB, 19.0°CWB
Outdoor : 35°CDB, 24°CWB
Specifications
Hermetically sealed rotary type
2.14
Propeller Fan
Mass
Sound pressure (cooling / heating)
Sound power
Liquid
Piping Connections
Gas
Drain
Safety devices
Capacity step
Refrigerant control
Max. length
Ref. piping
Max. height difference
Model
Refrigerant
Charge
Model
Ref. oil
Charge
Drawing No.
Note:
48
(H)21.5 (M)16.5 (L)12.5
kg
dB
dB
mm
mm
mm
Type
Motor output
Model
Type
Motor output
AFR
7.1
24,200
6,100
8.0
27,300
6,900
1.85
1.70
3.84
4.71
4.67
3.74
FCQG71EVEB
FCQG100EVEB
FCQG125EVEB
FCQG140EVEB
RZQG100LV1B
RZQG125LV1B
RZQG140LV1B
1 phase, 220-240V, 50Hz
10.0
12.5
14.0
34,100
42,700
47,800
8,600
10,800
12,000
11.2
14.0
16.0
38,200
47,800
54,600
9,600
12,000
13,800
2.47
3.61
4.36
2.38
3.30
3.99
4.05
3.46
3.21
4.71
4.24
4.01
4.62
4.27
4.17
3.78
3.59
3.53
FCQG100EVEB
FCQG125EVEB
FCQG140EVEB
Galvanized steel plate
288×840×840
Cross fin coil (Multi louver fins and N-hix tubes)
1×18×1.25,2×18×1.2
0.550
QTS48C15M
Turbo Fan
106
(H)32 (M)25.5 (L)19
(H)33 (M)27 (L)21
—
25
44/39/33
45/41/35
45/41/37
61
φ 9.5 (Flare)
φ 15.9 (Flare)
VP25 (External dia. 32)
BRC1E51A7/BRC1D528
—
BYCP125B-W1
Fresh White
50×950×950
Resin net (With mold resistant)
5.5
RZQG100LV1B
RZQG125LV1B
RZQG140LV1B
Ivory White
1,430×940×320
1,430×940×320
1,430×940×320
Cross fin coil (Waffle fins and Hi-XSL tubes)
2×64×1.4
1.286
5VD420XAA21
Heating
Indoor : 20°CDB, 15°CWB
Outdoor : 7°CDB, 6°CWB
Piping length
5m
(Horizontal)
7
Specifications
SiBE281013
FHQG (Ceiling Suspended Type)
Model
Indoor unit
Outdoor unit
FHQG71CVEB
RZQG71LV1B
Power Supply
Cooling capacity ∗1
Heating capacity ∗1
Cooling input ∗1
Heating input ∗1
EER
COP
SEER (by Feb-2010-Tool)
SCOP (Bivalent point-4°C)
Indoor unit
Colour
Dimensions H×W×D
Type
Coil
Row×Stages×Fin pitch
Face area
Model
Type
Fan
Motor output
AFR
Air filter
Mass
Sound pressure (H/M/L)
Sound power
Liquid
Piping
Connections Gas
Drain
Wired
Remote controller (option)
Wireless
Outdoor unit
Colour
Dimensions H×W×D
Type
Coil
Row×Stages×Fin pitch
Face area
Model
Comp.
Fan
kW
Btu/h
kcal/h
kW
Btu/h
kcal/h
kW
kW
—
—
—
—
7.1
24,200
6,100
8.0
27,300
6,900
1.95
2.05
3.64
3.90
4.41
3.51
FHQG71CVEB
mm
235×1,270×690
m²
0.303
3D15L1AA1
W
m³/min
91
(H) 20.5 (M) 17 (L) 14
kg
dB
dB
mm
mm
mm
32
38/36/34
55
RZQG71LV1B
mm
m²
Type
Motor output
Model
Type
Motor output
AFR
kW
2×44×1.4
0.884
2YC63FXD#D∗
Hermetically sealed swing
type
1.62
P51J11F×1
W
m³/min
kg
dB
dB
mm
mm
mm
94
59
77
48/50
64
14.0
47,800
12,000
16.0
54,600
13,800
4.65
4.42
3.01
3.62
3.66
3.40
FHQG140CVEB
(H) 34 (M) 29 (L) 24
46/42/38
64
RZQG140LV1B
Hermetically sealed rotary type
2.14
2.90
P51J11F×2
3.60
94+94
114
99
50/52
66
%
m
m
50 (Equivalent Length 70m)
kg
3.5 (Charged for 30m)
FVC50K
0.9
L
51/53
67
68
φ 9.5 (Flare)
φ 15.9 (Flare)
φ 26.0 (Hole)
High Pressure Switch, Fuse
100-0
Electronic Expansion Valve
75 (Equivalent Length 90m)
30
R-410A
4.0 (Charged for 30m)
FV50S
1.3
C: 3D069663C
∗1. The above data based on the conditions shown in the table below.
Cooling
Indoor : 27°CDB, 19.0°CWB
Outdoor : 35°CDB, 24°CWB
8
FHQG140CVEB
RZQG140LV1B
Propeller Fan
Mass
Sound pressure (cooling / heating)
Sound power
Liquid
Piping Connections
Gas
Drain
Safety devices
Capacity step
Refrigerant control
Max. length
Ref. piping
Max. height difference
Model
Refrigerant
Charge
Model
Ref. oil
Charge
Drawing No.
Note:
990×940×320
FHQG100CVEB
FHQG125CVEB
RZQG100LV1B
RZQG125LV1B
1 phase, 220-240V, 50Hz
10.0
12.5
34,100
42,700
8,600
10,800
11.2
14.0
38,200
47,800
9,600
12,000
2.61
3.87
2.67
3.72
3.83
3.23
4.19
3.76
4.53
4.11
3.68
3.46
FHQG100CVEB
FHQG125CVEB
Fresh White
235×1,590×690
Cross fin coil (Multi louver fins and N-hix tubes)
3×14×1.5
0.398
4D15L1AC1
Sirocco Fan
150
(H )28 (M) 24 (L) 20
(H) 31 (M) 27 (L) 23
Resin net (With mold resistant)
38
42/38/34
44/41/37
60
62
φ 9.5 (Flare)
φ 15.9 (Flare)
VP20 (External dia. 26)
BRC1E51A7/BRC1D528
BRC7G63
RZQG100LV1B
RZQG125LV1B
Ivory White
1,430×940×320
Cross fin coil (Waffle fins and Hi-XSL tubes)
2×64×1.4
1.286
5VD420XAA21
Heating
Indoor : 20°CDB, 15°CWB
Outdoor : 7°CDB, 6°CWB
Piping length
5m
(Horizontal)
Specifications
SiBE281013
Part 4
Remote Controller
1. Wired Remote Controller.......................................................................10
1.1
1.2
1.3
1.4
Applicable Models ..................................................................................10
Names and Functions ............................................................................11
MAIN/SUB Setting when Using 2 Remote Controllers ...........................15
Centralized Control Group No. Setting...................................................16
2. Wireless Remote Controller ..................................................................18
2.1 Applicable Models ..................................................................................18
2.2 Names and Functions ............................................................................18
2.3 MAIN/SUB Setting..................................................................................20
3. Service Mode ........................................................................................21
3.1 BRC1D528 .............................................................................................21
4. Inspection Mode....................................................................................23
4.1 BRC1D528 .............................................................................................23
Remote Controller
9
Wired Remote Controller
SiBE281013
1. Wired Remote Controller
1.1
Applicable Models
Model Series
Remote Controller
10
FCQG-E
FHQG-C
BRC1D528
BRC1E51A7
Remote Controller
SiBE281013
1.2
Wired Remote Controller
Names and Functions
1.2.1 BRC1D528
3
6 23 7
8
9
2
1
10
11
4
12
14
17
22
25
16
13
15 18 19
20
29
21
5
24
33
26
35
27
36
37
28
30
31
32
34
1. ON/OFF BUTTON
Press the ON/OFF button to start or stop the system.
2. OPERATION LAMP
The operation lamp lights up during operation or blinks if an error occurs.
3. OPERATION MODE ICON
These icons indicate the current operation mode (FAN, DRY, AUTOMATIC, COOLING,
HEATING).
4. VENTILATION MODE ICON
These icons indicate the current ventilation mode (HRV only) (AUTOMATIC, HEAT
EXCHANGE, BYPASS).
5. VENTILATION ICON
The ventilation icon appears when the ventilation is adjusted with the ventilation amount
button (HRV only). Simultaneously, the ventilation amount is indicated by the fan speed icon.
6. AIR CLEANING ICON
This icon indicates that the air cleaning unit (option) is operational.
7. LEAVE HOME ICON
The leave home icon shows the status of the leave home function.
ON
Leave home is enabled
FLASHING
OFF
Leave home is active
Leave home is disabled
8. EXTERNAL CONTROL ICON
This icon indicates that another controller with higher priority is controlling or disabling your
installation.
9. CHANGE-OVER UNDER CENTRALISED CONTROL ICON
This icon indicates that the change-over of the installation is under centralised control
assigned to another indoor unit or optional cool/heat selector connected to the outdoor unit
(= Main remote controller).
10.DAY OF THE WEEK INDICATOR
The day of the week indicator shows the current week day (or the set day when reading or
programming the schedule timer).
11.CLOCK DISPLAY
The clock display indicates the current time (or the action time when reading or
programming the schedule timer).
Remote Controller
11
Wired Remote Controller
SiBE281013
12.MAXIMUM SET TEMPERATURE
The maximum set temperature indicates the maximum set temperature when in limit
operation.
13.MINIMUM SET TEMPERATURE
The minimum set temperature indicates the minimum set temperature when in limit
operation.
14.SCHEDULE TIMER ICON
This icon indicates that the schedule timer is enabled.
15.ACTION ICONS
These icons indicate the actions for each day of the schedule timer.
16.OFF ICON
This icon indicates that the OFF action is selected when programming the schedule timer.
17.INSPECTION REQUIRED
and
These icons indicate that inspection is required. Consult your installer.
18.SET TEMPERATURE DISPLAY
This indicates the current set temperature of the installation (not shown in LIMIT operation or
in FAN or DRY mode).
19.SETTING
Not used, for service purposes only.
20.AIRFLOW DIRECTION ICON
This icon indicates the airflow direction (only for installations with motorised airflow flaps).
21.NOT AVAILABLE
is displayed whenever a non-installed option is addressed or a function is not
available.
22.FAN SPEED ICON
This icon indicates the set fan speed.
23.DEFROST/HOTSTART MODE ICON
This icon indicates that the defrost/hotstart mode is active.
24.AIR FILTER CLEANING TIME ICON
This icon indicates the air filter must be cleaned. Refer to the manual of the indoor unit.
25.ELEMENT CLEANING TIME ICON
This icon indicates the element must be cleaned (HRV only).
26.VENTILATION MODE BUTTON
The ventilation mode button operates the HRV; refer to the manual for more details.
27.VENTILATION AMOUNT BUTTON
This button sets the ventilation amount; refer to the manual for more details.
28.INSPECTION/TEST OPERATION BUTTON
Not used, for service purposes only.
29.PROGRAMMING BUTTON
This button is a multi-purpose button.
Depending on the previous manipulations of the user, the programming button can have
various functions.
30.SCHEDULE TIMER BUTTON
This button enables or disables the schedule timer.
31.TIME ADJUST BUTTON
These buttons are used to adjust the clock or, when in programming mode, to adjust the
programmed action time. Both buttons have an auto-repeat function.
32.TEMPERATURE ADJUST BUTTONS
These buttons are used to adjust the current setpoint or, when in programming mode, to
adjust the programmed setpoint temperature (step = 1°C). Both buttons are also used to
adjust the day of the week.
33.OPERATION CHANGE/MIN-MAX BUTTON
This button is a multi-purpose button. Depending on the previous manipulations of the user,
it can have following functions:
1 select the operation mode of the installation (FAN, DRY, AUTOMATIC, COOLING,
HEATING)
2 toggle between minimum temperature and maximum temperature when in limit operation
34.SETPOINT/LIMIT BUTTON
This button toggles between setpoint, limit operation or OFF (programming mode only).
35.FAN SPEED BUTTON
This button toggles between L (Low), H (High), HH (very High), (Automatic).
36.AIRFLOW DIRECTION ADJUST BUTTON
This button enables to adjust the airflow direction.
37.AIR FILTER CLEANING TIME ICON RESET BUTTON
This button is used to reset the air filter cleaning time icon.
12
Remote Controller
SiBE281013
Wired Remote Controller
1.2.2 BRC1E51A7
1. Operation mode
selector button
11. LCD (with backlight)
4. Up button
5. Down button
6. Right button
7. Left button
9. Operation lamp
8. On/Off button
3. Menu/Enter button
10. Cancel button
2. Fan speed control button
1. Operation mode selector button
„ Press this button to select the operation mode of your preference.
*Available modes vary with the connecting model.
2. Fan speed control button
„ Press this button to select the fan speed of your preference.
*Available fan speed vary with the connecting model.
3. Menu/Enter button
„ Used to indicate the main menu.
„ Used to enter the setting item selected.
4. Up button
(Be sure to press the part with the symbol
)
„ Used to raise the set temperature.
„ The next items on the upper side will be highlighted.
(The highlighted items will be scrolled continuously when the button is kept pressed.)
„ Used to change the item selected.
5. Down button
(Be sure to press the part with the symbol
)
„ Used to lower the set temperature.
„ The next items on the lower side will be highlighted.
(The highlighted items will be scrolled continuously when the button is kept pressed.)
„ Used to change the item selected.
Remote Controller
6.
„
„
„
Right button
(Be sure to press the part with the symbol
)
Used to highlight the next items on the right-hand side.
Each screen is scrolled in the right-hand direction.
Home leave settings are enabled with this button kept pressed for at least four seconds.
7.
„
„
„
Left button
(Be sure to press the part with the symbol
)
Used to highlight the next items on the left-hand side.
Each screen is scrolled in the left-hand direction.
Home leave settings are enabled with this button kept pressed for at least four seconds.
13
Wired Remote Controller
SiBE281013
8. On/Off button
„ Press this button and system will start.
„ Press this button again and system will stop.
9. Operation lamp (Green)
„ This lamp lights up during operation.
„ This lamp blinks if an error occurs.
10.Cancel button
„ Used to return to the previous screen.
11.LCD (with backlight)
„ The backlight will be light for approximately 30 seconds by pressing any operation button.
Operate buttons excluding the On/Off button while the backlight is lit.
„ If two remote controllers are used to control a single indoor unit, the backlight of the remote
controller operated earlier than the other one will be lit.
14
Remote Controller
SiBE281013
1.3
Wired Remote Controller
MAIN/SUB Setting when Using 2 Remote Controllers
Situation
The MAIN/SUB setting is necessary when 1 indoor unit is controlled by 2 remote controllers.
When you use 2 remote controllers (control panel and separate remote controller), set one to
MAIN and the other to SUB.
Setting
The remote controllers are factory set to MAIN, so you only have to change 1 remote controller
from MAIN to SUB. To change a remote controller from MAIN to SUB, proceed as follows:
1.3.1 BRC1D528
Step
1
Action
Insert a flat-head screwdriver into the recess between the upper and lower part of the remote
controller, as shown in the illustration below. Gently pry off the upper part of the controller, working
from the 2 possible positions.
Upper part of the
remote controller
Lower part of the
remote controller
2
Turn the MAIN/SUB changeover switch on the PCB to “S”.
M
S
M
S
The switch is set to
MAIN (factory setting)
Set the switch to SUB.
1.3.2 BRC1E51A7
The designation of the main and sub remote controllers can be swapped. Note that this change
requires turning the power off and then on again.
Basic screen
is displayed.
Press
Cancel
button
once.
Press and
hold Cancel
button for 4
seconds or
more.
Select "Main/sub changeover"
setting and press Menu/Enter button.
Field
menu is
displayed.
Remote Controller
Press Cancel button.
Item 2 is
displayed.
Press Menu/Enter
button.
Select "Main
remote controller"
or "Sub remote
controller" using
the /
(Up/Down) buttons,
and then press
Menu/Enter button.
Item 2 is
displayed.
15
Wired Remote Controller
1.4
SiBE281013
Centralized Control Group No. Setting
1.4.1 BRC1D528
In order to conduct the central remote control using the central remote controller and the unified
ON/OFF controller, Group No. settings should be made by group using the operating remote
controller.
Make Group No. settings for central remote control using the operating remote controller.
1. During normal mode, press and hold the “
” button for 4 seconds or more to enter the
"Field Setting Mode".
2. Select the Mode No. “00” with the “
” button.
3. Select the Group No. for each group with the “
” button.
(Group numbers increase in the order of 1-00, 1-01, ... 1-15, 2-00, ... 4-15.)
4. Press “
” or “
” button to set the selected Group No.
5. Press “
” button to return to the normal mode.
TEST
TEST
BRC1D528
Mode No.
Group No.
Field setting
mode
4
2
3
1,5
NOTICE
Enter the group No. and installation place of the indoor unit into the installation table. Be sure to
keep the installation table with the operation manual for maintenance.
16
Remote Controller
SiBE281013
Wired Remote Controller
1.4.2 BRC1E51A7
In order to conduct the centralized remote control using the centralized remote controller and
the unified ON/OFF controller, Group No. settings should be made by group using the operating
remote controller.
Make Group No. settings for centralized remote control using the operating remote controller.
(1) <Basic screen>
Press and hold Cancel button for 4 seconds or more.
Field setting menu is displayed.
(2) <Field setting menu screen>
Select Group No. setting in the field setting menu, and
press Menu/Enter button.
Group No. setting screen is displayed.
(3) <Group No. setting>
Select Group No. setting (Group), and press Menu/Enter
button.
Group No. setting (Group) screen is displayed.
(4) <Group No. setting (Group)>
Select the group No. by using ST (Up/Down) button.
Press Menu/Enter button.
NOTICE
Enter the group No. and installation place of the indoor unit into the attached installation table.
Be sure to keep the installation table with the operation manual for maintenance.
Remote Controller
17
Wireless Remote Controller
SiBE281013
2. Wireless Remote Controller
2.1
Applicable Models
Model Series
Remote Controller
2.2
FCQG-E
FHQG-C
—
BRC7G63
Names and Functions
(1)
(3)
ON OFF
H
L
DOWN
(8)
(10)
C
(6)
ON OFF
UP
TEMP
FAN
H
(4)
L TIME
(11)
C
hr.
(2)
M
UP
(9)
hr.
FAN
DOWN
(13)
RESERVE CANCEL
hr.
(5)
TIMER
(12)
MODE
(15)
hr.
TEST
(7)
SWING
(14)
(16)
TEST
TEST
(17)
Receiver
FHQG-C
(22)(23)
(19) (21) (20)
(18)
3P107422-31W
18
Remote Controller
SiBE281013
Wireless Remote Controller
DISPLAY “ ” (SIGNAL
TRANSMISSION)
1
This lights up when a signal is being
transmitted.
2
DISPLAY “ ” “ ” “
”“
“ ” (OPERATION MODE)
”
This display shows the current OPERATION MODE.
DISPLAY “
3
4
H
M
L
C
TIMER MODE START/STOP BUTTON
Refer to page 10.
TIMER RESERVE/CANCEL BUTTON
13
Refer to page 11.
AIR FLOW DIRECTION ADJUST
14 BUTTON
Refer to page 9.
12
OPERATION MODE SELECTOR
BUTTON
” (SET TEMPERATURE)
This display shows the set temperature.
hr.
DISPLAY “ hr.
”
(PROGRAMMED TIME)
This display shows PROGRAMMED
TIME of the system start or stop.
5
DISPLAY “
” (AIR FLOW FLAP)
Refer to page 9.
6
DISPLAY “ ” “ ” “ ” (FAN SPEED)
The display shows the set fan speed.
DISPLAY “
TEST”
(INSPECTION/ TEST OPERATION)
When the INSPECTION/TEST OPER7 ATION BUTTON is pressed, the display
shows the system mode is in.
Do not operate this button during normal use.
ON/OFF BUTTON
8 Press the button and the system will
start. Press the button again and the
system will stop.
FAN SPEED CONTROL BUTTON
9 Press this button to select the fan
speed, Low or Middle or High, of your
choice.
TEMPERATURE SETTING BUTTON
10 Use this button for SETTING TEMPERATURE.
TEMPERATURE ADJUSTMENT/
PROGRAMMING TIMER BUTTON
Use
this button for temperature setting
11
and programming “START and/or
STOP” time. (Operates with the front
cover of the remote controller opened.)
15
Press this button to select OPERATION
MODE. “
” (COOL), “
” (HEAT),
“
” (AUTO), “
” (FAN),
“
” (DRY).
FILTER SIGN RESET BUTTON
16 Refer to the section of MAINTENANCE
in the operation manual attached to the
indoor unit.
INSPECTION/TEST OPERATION
BUTTON
17 This button is used only by qualified
service persons for maintenance
purposes.
EMERGENCY OPERATION SWITCH
18 This switch is readily used if the remote
controller does not work.
RECEIVER
19 This receives the signals from the
remote controller.
OPERATING INDICATOR LAMP
(Red)
20 This lamp stays lit while the air
conditioner runs. It flashes when the
unit is in trouble.
TIMER INDICATOR LAMP (Green)
21
This lamp stays lit while the timer is set.
AIR FILTER CLEANING TIME
INDICATOR LAMP (Red)
22
Lights up when it is time to clean the air
filter.
DEFROST LAMP (Orange)
23 Lights up when the defrosting operation has started.
3P107422-31W
Remote Controller
19
Wireless Remote Controller
2.3
SiBE281013
MAIN/SUB Setting
Introduction
To set the wireless remote controller, you have to set the address for:
„ The receiver of the wireless remote controller
„ The wireless remote controller.
Setting the Address for the Receiver
When using both a wired and a wireless remote controller for 1 indoor unit, the wired controller
should be set to MAIN. Therefore, set the MAIN/SUB switch (SS1) of the receiver to SUB.
MAIN/SUB
MAIN/SUB
switch (SS1)
20
MAIN
SUB
S
S
M
M
Remote Controller
SiBE281013
Service Mode
3. Service Mode
3.1
BRC1D528
3.1.1 Display Service Data
Unit No.
Second
Code No.
Mode No.
Unit NO.
Field
Setting
Mode
SETTING
3
First
Code No.
1,2,7
4
TEST
6
5
3
1. Enter the field setting mode.
Press the inspection / test operation button for 4 seconds or more.
2. Enter the service mode.
After having entered the field setting mode, press the inspection / test operation button for 4
seconds or more.
3. Select the mode No.
Set the desired mode No. with the up/down temperature setting button.
4. Select the unit No.
Select the indoor unit No. set with the time mode START/STOP button.
5. Select the desired error history No. or sensor data No. with
or
button.
6. Each data displays (Refer to the table below display)
7. Return to the normal operation mode.
Press the inspection / test operation button once.
Mode
Function
No.
Error History
Content and Operation Method Example of Remote Controller Display
You can change the history
with the programming time updown button.
Past error code
40
1: Newest
~
Error history
3: Oldest
∗ "00" displayed for 4 and subsequent
Sensor Data
Display
41
Remote Controller
Select the display thermistor
with the programming time updown button
Display thermistor
00: Remote controller
thermistor
01: Suction air thermistor
02: Heat exchanger thermistor
Thermistor type
Temperature
21
Service Mode
SiBE281013
3.1.2 Service Setting
Mode No.
Unit No.
Second
Code No.
Mode No.
Unit NO.
Field
Setting
Mode
SETTING
3
First
Code No.
1,2,6
4
5
5
5
Second Code No.
TEST
5
Field Setting Mode
3
First Code No.
3
1,2,6
1. Enter the field setting mode.
Press the inspection / test operation button for 4 seconds or more.
2. Enter the maintenance mode.
After having entered the field setting mode, press the inspection / test operation button for a
minimum of 4 seconds.
3. Select the mode No.
Set the desired mode No. with the up/down temperature setting button.
4. Select the unit No.
Select the indoor unit No. set with the time mode START/STOP button.
5. Carry out the necessary settings for each mode. (Mode 43 only possible for wireless remote
controller)
• In case of Mode 43
Press timer ON / OFF button to decide the forced Fan ON.
• In case of Mode 44
Set “Fan speed” with fan speed control button and “Air flow direction” with air flow
direction adjusting button, then press timer ON / OFF button to decide.
• In case of Mode 45
Select the changed unit No. with
or
button, then press timer ON / OFF button to
decide.
6. Return to the normal operation mode.
Press the inspection / test operation button 1 time.
Mode Function
No.
Forced Fan ON Turns the fan ON for each unit
individually.
Individual
Setting
44
22
Fan
speed
1: Low
3: High
Changes unit No.
Set the unit No. after changing
with the programming time updown button.
0:Upper
Airflow direction
Settings are made using the
“air flow direction adjust” and
“fan speed adjust” buttons.
Unit No.
Change
45
Sets fan speed and air flow
direction for each unit
individually when using group
control.
~
43
Content and Operation Method Example of Remote Controller Display
4:Lowest
Field setting No.
No. after change
Remote Controller
SiBE281013
Inspection Mode
4. Inspection Mode
4.1
BRC1D528
Normal display (No display)
Press the Inspection/test button once.
Unit
Error code
Inspection
0
L0
(1) Inspection mode
Press the Inspection/test button once.
(1) Inspection mode
0
Unit
L0
Error code
Inspection
Error code blinks when an error occurs.
071
FJJ
(2) Indoor unit model code display
Press the Inspection/test button once.
(2) Indoor unit model code
0 7 1... Capacity code
F... Indoor unit system code ∗1
J... Indoor unit type code ∗2
J... Progression code
∗1 Indoor unit system code
–––
AA1
Display
F
(3) Outdoor unit model code display
Press the Inspection/test button once.
System classification
Standard indoor unit
∗2 Indoor unit type code
Display
Type
Model
C
Multi flow (Round flow)
FCQG
H
Ceiling suspended
FHQG
(3) Outdoor unit model code
Test operation
Test operation mode
Press the Inspection/test button once.
Model
Display
2AA
RZQG
Note:
Inspection mode is not available for BRC1E51A7.
Remote Controller
23
SiBE281013
Part 5
Function and Control
1. Function of Main Components and Thermistors ...................................25
2. Operation Flow Chart ............................................................................27
2.1 Cooling / Dry Operation..........................................................................27
2.2 Heating Operation ..................................................................................28
3. Function Details ....................................................................................29
3.1 Indoor Unit..............................................................................................29
3.2 Outdoor Unit ...........................................................................................33
24
Function and Control
SiBE281013
Function of Main Components and Thermistors
1. Function of Main Components and Thermistors
RZQG71L
(B)Electronic
expansion valve
Filter
Filter
Outdoor
heat exchanger
(C) Four way valve
R3T
R2T R3T
Indoor heat exchanger
R5T
Pressure
switch
(high)
R6T
S1PH
Service port
(5/16" flare)
R2T
R1T
Field piping φ9.5
C1220T-O
Field piping φ15.9
C1220T-O
Indoor unit
*R1T
R4T
Check valve
Compressor
Accumulator
Accumulator
(A) Compressor
Outdoor unit
Stop valve
(with service port 5/16" flare)
* This thermistor is near the el. compo. box.
C: 3D069535
RZQG100-140L
(B)Electronic
expansion valve
Filter
Filter
Outdoor
heat exchanger
(C) Four way valve
R3T
R2T R3T
Indoor heat exchanger
R6T
*R1T
R4T
Pressure
switch
(high)
S1PH
R5T
Service port
(5/16" flare)
R2T
R1T
Field piping φ9.5
C1220T-O
Field piping φ15.9
C1220T-O
Indoor unit
Stop valve
Compressor
Accumulator
Accumulator
(A) Compressor
Outdoor unit
(with service port 5/16" flare)
* This thermistor is near the el. compo. box.
C: 3D069536
Function and Control
25
Function of Main Components and Thermistors
SiBE281013
„ Outdoor Unit
(A) Compressor (M1C)
Inverter drive unit varies compressor operating frequency to control capacity and other
factors.
(B) Electronic Expansion Valve (Y1E)
Provides control to maintain optimum operating condition for high efficiency.
(C) Four Way Valve (Y1S)
Changes operation of cooling / heating.
∗ Coil energized : heating
Coil not energized : cooling
Outdoor Air Thermistor (R1T)
Used for startup condition control and defrost control.
Discharge Pipe Thermistor (R2T)
Used for discharge temperature protection during compression operation.
Suction Pipe Thermistor (R3T)
Used for suction super heat control by electronic expansion valve.
Heat Exchanger Distributor Pipe Thermistor (R4T)
• Used for calculation of outdoor heat exchanger subcooling during cooling operation.
• Used for judgement of the defrost IN and OUT condition.
Intermediate Heat Exchanger Thermistor (R5T)
Used for calculation of high pressure during cooling operation. (Calculate Pc by detected
temperature and R-410A refrigerant characteristics)
Liquid Pipe Thermistor (R6T)
Used for calculation of indoor unit heat exchanger subcooling during heating operation.
Radiation Fin Thermistor (R10T)
• Used for outdoor fan speed control.
• Used for inverter radiation fin temperature control.
• Used for pressure difference control.
„ Indoor Unit
FCQG
R1T
FHQG
R1T
R2T
R3T
R2T
R3T
Thermistor
Suction air thermistor
Heat exchanger thermistor
Indoor Suction Air Thermistor
Cooling: • Thermostat control
• PMV control
• General frequency control
Heating: • Thermostat control
• PMV control
• General frequency control
Indoor Heat Exchanger Thermistor
Cooling: • Compressor frequency control (target Te)
• Inverter current protection control
• Freeze-up control
Heating: • Compressor frequency control (target Tc)
• Inverter current protection control
• Hot start control
• Peak cut-off
26
Function and Control
SiBE281013
Operation Flow Chart
2. Operation Flow Chart
2.1
Cooling / Dry Operation
Power supply ON
Initialize electronic expansion valve
Initialize micro-computer
A
Preheating operation control
Remote controller operation
judgement
Cooling/Dry
Operation mode
judgement
Emergency
Emergency
operation
Heating
Heating
Cooling/Dry
Thermostat ON judgement
Starting control four way
valve changeover
B
Normal control
·
·
·
·
·
Compressor step control
Electronic expansion valve PI control
Low pressure protection control
High pressure protection control
Discharge pipe temperature protection control
Oil recovery
operation starting
judgement
·
·
·
·
Thermostat OFF judgement
Room thermostat control
Thermostat OFF by freeze-up
protection
Inverter current protection control
Low outdoor temperature cooling control
Overall current protection control
Simulated operation
Remote
Standby Abnormal stop
control
judgement
judgement
operation OFF
judgement
Oil recovery
operation
Oil recovery
operation ending
judgement
Restart standby
A
B
Function and Control
27
Operation Flow Chart
2.2
SiBE281013
Heating Operation
Power supply ON
Initialize electronic expansion valve
Initialize micro-computer
A
Preheating operation control
Remote controller ON
operation judgement
Cooling/Dry
Emergency
Operation mode
judgement
Emergency
operation
Heating
Heating
Cooling/Dry
Thermostat ON judgement
Starting control
four way valve changeover
Hot start control
B
·
·
·
·
·
Normal control
Compressor step control
Electronic expansion valve PI control
Low pressure protection control
High pressure protection control
Heating overload control
Defrosting
condition
Four way valve
changeover
·
·
·
·
·
Suction pipe superheat protection control
Discharge pipe temperature protection control
Inverter current protection control
Overall current protection control
Simulated operation
Thermostat OFF judgement
Room thermostat control
Thermostat OFF by outdoor
temperature
Remote
Standby
control
operation OFF judgement
judgement
Defrost
operation
Abnormal
stop
judgement
Error code
indication
Pump down residual operation
Defrost
ending
judgement
Four way valve
changeover
Hot start
control
Restart standby
A
B
28
Function and Control
SiBE281013
Function Details
3. Function Details
3.1
Indoor Unit
3.1.1 Set Temperature and Control Temperature
The relationship between "Set temperature by remote controller" and "Control target
temperature" is as shown below.
Heating
Cooling
14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35˚C
Set temperature by remote
controller
Control target temperature
Set temperature by remote
controller
Control target temperature
The z mark indicates the “Control target temperature” (°C) as an example when the “Set
temperature by remote controller” is set there.
3.1.2 Thermostat Control
According to a difference between the temperature set by the remote controller and the actually
detected room temperature (∗1), the thermostat is turned ON or OFF.
∆T: Detected room temperature - Temperature set by remote controller
Tro: Room temperature detected when dry operation is started
Tr: Room temperature detected by thermistor
z In normal operation
In cooling
OR
Normal operation
(Thermostat ON)
·∆T ≤ -0.5ºC continues for 1 minute.
·∆T ≤ -2ºC
Thermostat OFF
∆T ≥ +0.5ºC
In heating
OR
Normal operation
(Thermostat ON)
Function and Control
·∆T ≥ +0.5ºC continues for 1 minute.
·∆T ≥ +2ºC
Thermostat OFF
∆T ≤ -0.5ºC
29
Function Details
SiBE281013
z In dry operation
∆T < -2.5ºC
Tro > 24ºC
Dry operation
∆ > -1ºC
Thermostat OFF
24ºC ≥ Tro > 16ºC
∆T < -2ºC
Dry operation
Thermostat OFF
∆ > -1ºC
16ºC ≥ Tro
Tr < 13ºC
Dry operation
Thermostat OFF
Tr > 15ºC
Note:
∗1: The thermistor to detect room temperature is as follows according to field setting.
· Factory setting: Indoor unit suction air thermistor
· When set to remote controller thermistor: Indoor air thermistor in the remote controller
3.1.3 Switchable Fan Speed
The setting airflow rate when the thermo. is turned on and off by operation mode is as shown
below. The airflow rate when the thermo. is turned off can be changed in field setting. The table
below shows the factory setting.
Fan
Cooling
Thermostat ON
Thermostat OFF
Set
Set
Program Dry
Thermostat ON
Thermostat OFF
L
OFF
Heating
Thermostat ON
Thermostat OFF
Set
LL
Fan
Stop
Set
OFF
3.1.4 Swing Pattern Selection
Swing flaps operate as shown in the table below.
Thermostat ON
Fan
Set
Thermostat OFF
Thermostat ON
Set
Swing
Thermostat OFF
Thermostat ON
Swing
Set
Thermostat OFF
Thermostat ON
Set
Swing
Thermostat OFF
Swing
Flap Set
Thermostat ON
Thermostat OFF
Set
Horizontal
Swing Set
Thermostat ON
Thermostat OFF
Swing
Horizontal
Flap Set
Cooling
Swing Set
Flap Set
Program Dry
Swing Set
Heating
Fan
Stop
Flap Set
Swing Set
Set
Swing
3.1.5 Drain Pump Control (Only for FCQG)
„ Cooling / Dry Operation
Normally drain pump ON (Thermostat ON/OFF)
30
Function and Control
SiBE281013
Function Details
„ Heating
When the following condition consists by mounting the adaptor for wiring PCB, the drain pump
is turned on.
Drain pump
Float switch
ON
OFF
5 min.
5 sec.
ON
OFF
3.1.6 Control when the Operation Mode is Set to “Auto”
Setting the operation mode to “Auto” with the remote controller, the unit is controlled regarding
the contents shown below.
Auto heating
Auto cooling
(Suction air temperature - Set temperature by remote controller) ˚C
-7
-6
-5
-4
-3
-2
-1
±0
+1
+2
+3
+4
+5
+6
+4
+5
+6
Thermo.ON
Thermo.OFF
Display switch
Display switch
Cooling→Heating Heating→Cooling
Thermo.ON
Thermo.OFF
-7
-6
-5
-4
-3
-2
-1
±0
+1
+2
+3
(Suction air temperature - Set temperature by remote controller) ˚C
3.1.7 Dew Condensation Prevention Control
„ FCQG
When indoor unit humidity is high during the operation, the moving range of louvers is limited.
Relative humidity is high
Dew condensation prevention
control is cancelled.
Relative humidity is low
Dew condensation prevention
control is activated.
The operation of louvers while this control is activated is as shown below.
Setting of louvers
Indoor unit
P0
P0
P1
P0
P1
P1
P1
P1
P2
P2
P2
P3
P3
P3
P4
P4
P4
Swing
P0~P4
P1~P4
P2
P4
Dew Condensation Prevention
Control
Cancelled
Activated
P3
AIR
Position of louvers
(when viewed from horizontal direction)
„ FHQG
In cooling and dry operation, the following control is carried out in order to prevent dew
condensation when the horizontal blade blows air downward.
Starting condition
&
Function and Control
(
• Horizontal blade is set to downward flow (P3 or P4)
• Cooling operation (compressor operation) continues for 30 minutes.
31
Function Details
SiBE281013
Dew condensation prevention control
Dry operation with horizontal airflow is carried out for 1 hour. (P2)
Note:
1. When there is any change to heating/fan modes, airflow direction and operation ON/OFF
state during dew condensation prevention control, this control is reset.
3.1.8 Freeze-up Prevention Control
The unit will perform the forced thermostat off function in following conditions:
Thermostat off due to freeze-up prevention.
Based on the judgement to prevent the indoor heat exchanger from freezing, the thermostat
is forcedly turned OFF.
Indoor unit
heat exchanger
temperature
7ºC
Freeze-up prevention control
Reset after a continuous 10 minutes and cumulative
timer cleared after a continuous 10 minutes
Cumulative timer cleared after a continuous 20 minutes
4ºC
-1ºC
-3ºC
-5ºC
The thermostat turns OFF after a cumulative 40
minutes
The thermostat turns OFF after a continuous 1 minute
after 8 minutes from startup (∗1)
The thermostat turns OFF after a continuous 1 minute
after 8 minutes from startup
*1 FHQG Only
3.1.9 Monitoring Control
When the indoor unit fan is turned off while the thermo. for cooling, heating and drying is off,
even if the indoor unit temperature recovers afterwards and becomes the one that turns the
thermo. on, the thermistor cannot detect indoor unit temperature because the suction air
thermistor of indoor unit is installed inside the machine.
In order to prevent such a condition, this monitoring control has the function of detecting indoor
unit temperature by operating the fan at certain intervals when the fan is turned off while the
thermo. is off.
3.1.10 Defrost Control
When the heating operation continues at a low outdoor air temperature, the frost adhered to the
surface of outdoor heat exchanger deteriorates heating capacity.
When the amount of adhered frost exceeds a certain level, the operation will automatically
switch to the cooling cycle to melt the frost.
When the frost is melted, the normal heating operation will be resumed.
3.1.11 Draft Avoidance Control
In order to prevent cold wind from directly blowing to the user when the indoor heat exchanger
temperature is low, such as the timing that heating started and defrost ended, this control has
the function of changing the airflow rate to LL tap and fixing the airflow direction to horizontal.
32
Function and Control
SiBE281013
3.2
Function Details
Outdoor Unit
3.2.1 Abnormal Stop
When the following items show abnormal values, the thermostat turns OFF and error is
determined based on the number of retry in order to protect the compressor and other devices.
Item
Criteria
Number of retry
Low pressure
0.12 MPa or less continues for 5 minutes
HPS activated or
over 3.92 MPa continues for 1 minute
10 times in 200 minutes
High pressure
15 times in 300 minutes
Discharge pipe
temperature
RZQG71LV1B
Temperature over 110°C continues for 15
minutes or temperature exceeds 125°C
RZQG100-140LV1B
Temperature over 115°C continues for 10
minutes or temperature exceeds 125°C
10 times in 200 minutes
Power supply
Negative-phase-sequence power
None (No retry)
3.2.2 Restart Standby
To prevent compressor from frequent ON/OFF and equalize pressure in refrigerant line,
conducts forced thermostat OFF for 3 minutes after compressor stopping. Moreover, outdoor
unit fan conducts residual operation for a period of time to expedite equalization and prevent
refrigerant from entering in evaporator.
Compressor
Thermostat OFF
ON
Restart standby complete
OFF
Electronic
expansion valve
Operation
complete
A
Cooling
D
C
B
E
F sec. G H I
sec. sec. sec.
0
Moves to "Stop" or "Starting control"
after completion of "Restart standby".
Heating
0
Outdoor unit fan
ON
Residual OFF
operation
For 3 min.
Function and Control
RZQG71LV1B
RZQG100-140LV1B
A
480
480
B
C
480
480
480
480
D
E
480
480
480
480
F
G
60
60
10
30
H
I
30
30
30
30
33
Function Details
SiBE281013
3.2.3 Preheating Operation Control
After the compressor has been turned OFF, the preheating operation control will be activated in
order to avoid refrigerant from dissolving in the compressor oil and quick increase of heating
level during the heating operation.
Starting
Conditions
&
• Compressor stopping
• 6 hours or less after turning ON the power.
• 1 hour or more after turning OFF the compressor.
or
& • Outdoor air temperature is not declining.
• Discharge pipe temperature < 40˚C
&
• Operation of thermostat is established.
• 6 hours or more after turning ON the power.
• 1 hour or less after turning OFF the compressor.
&
or • Outside temperature is declining.
• Discharge pipe temperature > 43˚C
Ending Conditions
3.2.4 Outdoor Unit Fan Control during Heating Thermostat OFF
In order to prevent the false detection of outdoor suction temperature while the heating thermo.
is off (excluding the timing when the remote controller is off), the outdoor unit fan is turned on
and off at certain intervals.
Starting condition: Outdoor air temperature > 25°C
Ending condition: Outdoor air temperature < 20°C
ON
Outdoor unit fan OFF
6 min.
6 min.
6 min.
6 min.
3.2.5 Starting Control
When compressor start up, the starting frequency is fixed for specified period of time at low
frequency to prevent returning of refrigerant.
Starting
control
complete
Pressure
equalizing
complete
Pressure
equalizing
start
Pressure equalizing
control before
compressor start
Starting control
(60 sec.)
Compressor
72 pls
Electronic
expansion valve
• RZQG71LV1B
118.5 Hz
• RZQG100~140LV1B
104 Hz
(Electronic expansion
valve control when start up)
(40 sec.)
8 Step ON
(Cooling)
Outdoor unit fan
(Outdoor unit fan control
when start up)
OFF
(Heating)
L (Cooling)
Set fan speed (Cooling)
LL (Heating)
Indoor unit fan
(Thermostat OFF)
(Remote controller OFF)
L
M
(Heating)
OFF
10~120 sec.
34
Function and Control
SiBE281013
Function Details
3.2.6 Room Thermostat Control
Based on the difference between the set temperature by remote controller and indoor unit
suction air temperature, the thermo. is turned on and off.
∆T = Indoor suction air temperature – temperature set by remote controller (Cooling)
∆T = Temperature set by remote controller – indoor suction air temperature (Heating)
Thermostat ON Condition
∆T > +0.5°C
Thermostat OFF Condition
or
• ∆T ≤ – 0.5˚C continues for 1 minute (for RZQG71LV1B)
• ∆T ≤ – 0.5˚C continues for 1 minute
•& • 5 minutes or more after start up
(for RZQG100 - 140LV1B)
• ∆T ≤ – 2˚C (Cooling)
• ∆T ≤ – 2.5˚C (Heating)
When changed suddenly from ∆T ≥ +1.5˚C to ∆T ≥ -0.5˚C
Function and Control
35
Function Details
SiBE281013
3.2.7 Compressor Step
The compressor operation frequency is controlled in order to keep a constant evaporation
temperature in cooling and a constant condensing temperature in heating.
Cooling
∆t cool = Remote controller set temperature - Indoor return air temperature.
Depending on ∆t cool and the cooling load, the target evaporating temperature will be a value
between 2°C and 20°C.
Heating
∆t heat = Indoor return air temperature - Remote controller set temperature.
Depending on ∆t heat and the heating load, the target condensing temperature will be a value
between 42°C and 54°C. (for RZQG100-140LV1B : 42°C and 50°C)
Step No.
RZQG71LV1B
Compressor operation frequency
RZQG100LV1B
RZQG125·140LV1B
1
2
—
—
30 Hz
33 Hz
30 Hz
33 Hz
3
4
57 Hz
61.5 Hz
36 Hz
40 Hz
36 Hz
40 Hz
5
6
66 Hz
72 Hz
44 Hz
48 Hz
44 Hz
48 Hz
7
8
78 Hz
85.5 Hz
52 Hz
56 Hz
52 Hz
56 Hz
9
10
93 Hz
102 Hz
60 Hz
65 Hz
60 Hz
65 Hz
11
12
109.5 Hz
118.5 Hz
70 Hz
76 Hz
70 Hz
76 Hz
13
14
127.5 Hz
136.5 Hz
82 Hz
89 Hz
82 Hz
89 Hz
15
16
145.5 Hz
151.5 Hz
96 Hz
104 Hz
96 Hz
104 Hz
17
18
154.5 Hz
174 Hz
112 Hz
121 Hz
112 Hz
121 Hz
19
20
183 Hz
192 Hz
129 Hz
137 Hz
129 Hz
137 Hz
21
22
201 Hz
211.5 Hz
144 Hz
—
144 Hz
151 Hz
23
24
222 Hz
232.5 Hz
—
—
159 Hz
167 Hz
25
26
243 Hz
253.5 Hz
—
—
175 Hz
180 Hz
27
28
265.5 Hz
277.5 Hz
—
—
—
—
29
289.5 Hz
—
—
: Maximum frequency in cooling
36
Function and Control
SiBE281013
Function Details
3.2.8 General Electronic Expansion Valve Control
When cooling/heating, PI control of electronic expansion valve is conducted to keep the heat
exchanger outlet subcooling degree constant.
• Target heat exchanger outlet subcooling degree > actual heat exchanger outlet subcooling
degree
→ The electronic expansion valve will close.
• Target heat exchanger outlet subcooling degree < actual heat exchanger outlet subcooling
degree
→ The electronic expansion valve will open.
∗ The value of target heat exchanger outlet subcooling degree varies depending on change of
discharge pipe superheat degree of inverter compressor, etc.
3.2.9 Hot Start Control (Only in Heating Operation)
In heating, when performing a startup, or after the defrosting cycle has been completed, the
indoor fan will be controlled in order to prevent cold air draft and secure the starting
performance (quick pressure build-up).
Indoor unit fan: OFF
Heating operation is turned ON with remote controller.
Indoor unit fan: LL tap
&
Indoor unit fan: L tap
&
Indoor unit fan: M tap
&
(
(
(
• 1 minute elapsed with LL tap
• Condition A is met.
• Condition B is met.
OR
• 3 minutes elapsed after compressor startup
(
• 1 minute elapsed with L tap
• Condition A is met.
• Condition B is met.
OR
• 5.5 minutes elapsed after compressor startup
(
(Continuing L tap on indoor unit without M tap equipped)
• 1 minute elapsed with M tap
OR
(
• Condition A is met.
• Condition C is met.
• 10.5 minutes elapsed after compressor startup
Indoor unit fan: Set fan speed
Condition
A
B
C
Function and Control
Indoor unit heat exchanger temperature > 34°C
Indoor unit heat exchanger temperature > indoor suction
air temperature +17°C
(+12°C if outdoor air temperature is < 5°C)
Indoor unit heat exchanger temperature > indoor suction
air temperature +22°C
(+20°C if outdoor air temperature is < 5°C)
37
Function Details
SiBE281013
3.2.10 Night-time Quiet Operation
A. Setting by Remote Controller
Night-time quiet operation can be set by field setting from the wired remote controller.
By estimating current time based on the change of outdoor air temperature, the low noise
operation is automatically performed at night (from 22:00 to 8:00) by limiting the number of
revolutions of outdoor unit fan and the operation frequency of the compressor. (The time at
night is target.)
B. Setting by Demand Operation (Option)
Short circuit between COM-LNOP on terminal of demand adaptor.
Low sound running to be done with limited outdoor fan speed compressor running
frequency.
Note:
In the case of capacity priority setting
Setting the "Capacity priority setting" from the field setting mode of indoor remote controller, the
capacity is prioritized in the operations of both A and B, and when the air conditioning load
becomes high, the low noise operation stops and the normal operation starts.
If you cancel the capacity priority setting when the low noise setting remains, the low noise
setting is prioritized, and even if air conditioning load becomes high, the noise operation
continues.
3.2.11 Low Pressure Protection Control
In order to prevent abnormal low pressures in the system, the below control function will be
activated.
(Cooling)
(Heating)
Normal operation
Normal operation
• Within 10 minutes after
defrosting
• From the starting to
within 5 minutes after
the startup control stops
• Lp < 0.12 MPa
• OR
Lp < 0.12 MPa
&
• Lp > 0.15 MPa
• 30 sec elapsed
&
Compressor upper limit frequency
RZQG71LV1B: 57 Hz
RZQG100-140LV1B: 30 Hz
• Lp > 0.15 MPa continues
for 1 minute
Compressor upper limit frequency
20 steps
• Lp < 0.12 MPa continues
for 10 seconds
• Lp > 0.15 MPa continues
for 10 seconds elapsed
Compressor upper limit frequency
10 steps
• Lp < 0.12 MPa continues
for 1 minute
Condition E
Condition E
Lp > 0.15 MPa
Compressor upper limit frequency
RZQG71LV1B: 57 Hz
RZQG100-140LV1B: 30 Hz
Condition E
• Lp < 0.12 MPa continues
for 5 minutes
10 times or less
stopping in 200 minutes
Compressor stop: 0 Hz
Stopped 11 times in 200 minutes
Abnormal stop (E4 indication)
•&
• 5 minutes after starting
• 10 minutes elapsed after
defrosting
Condition E* : OR
• Lp > 0.15 MPa continues for 1 minute
38
Function and Control
SiBE281013
Function Details
3.2.12 High Pressure Protection Control
In order to prevent abnormal high pressures in the system and hence avoiding activation of the
high pressure safety device the below control function will be activated.
(Cooling)
(Heating)
Normal operation
Normal operation
• Hp < 3.24 MPa
Hp < 3.42 MPa
Hp > 3.53 MPa
&
• 30 sec elapsed
Compressor operation
frequency +1 step/1 min.
Compressor operation
frequency B Hz
15 times or less
Hp > 3.67 MPa
Hp < 3.42 MPa
• Hp > 3.92 MPa
stopping in 300
OR
Compressor operation
Compressor operation
• HPS activates
minutes
frequency +1 step/5 min.
frequency A Hz
Compressor stop
• HPS activates Hp < 3.52 MPa
• Stopped 16 times in
OR • Hp > 3.92 MPa
300 minutes
for 1 minute
Hp > 3.57 MPa
Compressor operation
frequency –1 step/10 sec.
Abnormal stop (E3 indication)
Compressor stop
• Stopped 16 times
in 300 minutes
Abnormal stop (E3 indication)
As the bearing resistance limit pressure decreases during slow operation of the compressor, the
lower limit of frequency is restricted.
[In cooling/heating operation]
Hp ≥ C MPa
Compressor frequency lower limit
E Hz
Normal operation
Hp ≤ D MPa
After 30 seconds
A Hz
RZQG71LV1B
118.5 Hz
RZQG100-140LV1B
52 Hz
B Hz
C MPa
57 Hz
3.04 MPa
52 Hz
2.70 MPa
D MPa
E Hz
2.84 MPa
57 Hz
2.60 MPa
40 Hz
3.2.13 Heating Control at High Outdoor Air Temperature
Under the condition of heating overload, control the outdoor unit fan in order to secure the
difference of elevation pressure and the pressure ratio of the compressor.
Normal
OR
• Hp-Lp < 0.39 MPa
OR
• Hp > 3.43 MPa
(
&
Outdoor unit fan
-1 step/30 sec.
Function and Control
> 0.59 MPa
( •• Hp-Lp
Hp < 3.33 MPa
(
• Hp-Lp > 0.69 MPa
•&
( (
• OR
•&
< 3.24 MPa
( •• Hp
Outdoor unit fan = 8 step
• Hp < 2.75 MPa
• Lp < 0.12 MPa
Outdoor unit fan
+1 step/30 sec.
39
Function Details
SiBE281013
3.2.14 Suction Pipe Superheat Protection Control (Only in Heating
Operation)
In case the suction superheat value in heating mode is too high, the oil return to the compressor
will be insufficient. In order to avoid that the compressor oil will be accumulated in the outdoor
unit heat exchanger, the upper limit frequency will be controlled.
SH: Superheat degree
EV: Electronic expansion valve
Normal operation
• Suction SH > 12˚C
OR
• Suction SH > 10˚C
& • EV opening degree = 480 pls
• Suction SH < 4˚C
OR
• Suction SH < 4˚C
• Suction SH < 8˚C
OR
&
• & • Upper limit frequency = Maximum frequency
• Suction SH < 8˚C
• OR
• Suction SH < 10˚C
•&
• EV opening degree < 450 pls
• Suction SH < 10˚C
• EV opening degree < 450 pls
Lowering upper limit frequency
for 1 step every 20 seconds
Raising upper limit frequency for
1 step every 20 seconds
• Suction SH > 12˚C
OR
40
&
• Suction SH > 10˚C
• EV opening degree = 480 pls
Function and Control
SiBE281013
Function Details
3.2.15 Discharge Pipe Temperature Protection Control
Electronic expansion valve opening degree and the compressor operating frequency will be
controlled in order to avoid abnormal high compressor temperatures.
Td: Discharge pipe temperature
Compressor Operating Frequency Control
Normal operation
OR
Td > 105°C
Compressor upper limit frequency
–1 step/20 sec.
• Td ≥ 110°C
continues for 5
minutes
OR
• Td > A°C
Compressor upper limit frequency
+1 step/1 min.
Td ≤ 105°C
• &
• Td < 70°C
• Upper limit frequency
• &
= Maximum frequency
• Td < 105°C
OR
• Td < 70°C
• & • Td ≤ 105°C
• 5 min. elapsed
Compressor upper limit frequency
RZQG71LV1B: 12 steps
RZQG100-140LV1B: 9 steps
OR
• Td ≥ B°C continues
for C minutes
• Td ≥ 125°C
10 times or less stopping in 200 minutes
Compressor stop
Stopped 11 times
in 200 minutes
Abnormal stop (F3 indication)
RZQG71LV1B
RZQG100-140LV1B
A°C
B°C
100°C
110°C
115°C
115°C
C minutes
15 minutes
10 minutes
Electronic Expansion Valve Opening Degree Control
Td: Compressor discharge pipe temperature (°C)
Normal control
Td > 95˚C
Electronic expansion valve opening
degree lower limit
+5 pulses/Cooling for 2 minutes
Heating for 1 minute
Td < 80˚C
Td < 90˚C
Electronic expansion valve opening
degree lower limit
-5 pulses/Cooling for 2 minutes
Heating for 1 minute
Td > 100˚C
Electronic expansion valve opening
degree lower limit
+10 pulses/Cooling for 2 minutes
Heating for 1 minute
3.2.16 Capacitor Electric Discharge Control
After the operation stopped (the stop caused by the remote controller, an error, and the
compressor and outdoor unit fan motor when retry thermo. is off), open phase waveform is
output for about one minute for electric discharge of the capacitor.
Afterwards, electric discharge will continue due to discharge resistance until the capacitor
voltage becomes 0 V. At this time, operation sound may be heard from the outdoor unit.
Function and Control
41
Function Details
SiBE281013
3.2.17 Thermostat OFF due to Outdoor Air Temperature (Only in Heating
Operation)
If outdoor air temperature is high, the unit conducts forced thermostat OFF at the following
temperature to protect the system.
Outdoor air temperature > 32°C
3.2.18 Inverter Current Protection Control
Restricts compressor operation frequency to prevent compressor from tripping due to inverter
overcurrent.
Normal operation
Inverter current
> Stepping down current
Compressor frequency
–1 step/6 sec.
Inverter upper limit frequency
= Maximum frequency
Compressor frequency
+1 step/2 min.
The condition of Inverter current < Stepping down current
continues for 2 minutes
&
Stepping-down
current A
OR
42
Outdoor heat exchanger temperature
(liquid) ≥ Indoor heat exchanger temperature
Outdoor heat exchanger temperature
(liquid) ≥ 25˚C
Stepping-down
current B
Outdoor heat exchanger temperature
(liquid) < Indoor heat exchanger temperature
Outdoor heat exchanger temperature
(liquid) < 25˚C
A
RZQG71LV1B
11.0 A
RZQG100-140LV1B
14.0 A
B
13.7 A
20.0 A
Function and Control
SiBE281013
Function Details
3.2.19 Low Outdoor Air Temperature Control in Cooling Operation
Controls compressor and outdoor unit fan under low outdoor air temperature condition to secure
pressure difference between high and low pressure.
Hp: High pressure
Lp: Low pressure
Ta: Outdoor air temperature
Tfin: Inverter fin temperature
OR
&
Hp-Lp < 0.93MPa
Normal operation
Compression ratio < 2.1
Hp < 1.86MPa
Ta < 25˚C
Outdoor unit fan
+1 step/90 sec.
Compressor operation frequency
restriction (refer to the followings)
& OR
Hp-Lp < 0.78MPa
OR
&
OR
Compression ratio ≤ 1.8
Hp < 1.57MPa
OR
Hp-Lp > 1.08MPa
OR Hp < 2.94MPa
Compression ratio > 2.4
Ta > 27˚C
&
Hp-Lp > 0.98MPa
Compression ratio > 2.2
Hp > 2.25MPa
Outdoor unit fan
Step 1
Outdoor unit fan
-1 step/90 sec.
Hp-Lp < 0.78MPa
&
OR
Compression ratio < 1.8
Hp < 1.57MPa
Tfin < 66˚C
Hp-Lp > 0.88MPa
Compression ratio > 2.0
Hp > 1.66MPa
Tfin ≥ 81˚C
Outdoor unit fan: Stop
Frequency Restriction
No frequency
restriction
Function and Control
Ta ≤ 25˚C
Ta > 27˚C
RZQG71LV1B
RZQG100-140LV1B
Lower limit frequency Lower limit frequency
Step 11
Step 9
Upper limit frequency Upper limit frequency
Step 17
Step 15
43
Function Details
SiBE281013
3.2.20 Protection Control by Overall Current
Monitors the overall current and restricts the upper limit compressor operating frequency to
prevent circuit breakers from exceeding the rated capacity.
Outdoor unit current ≤ upper limit
current value
Upper limit compressor operating
frequency = Maximum frequency
Normal operation
Outdoor unit current
> upper limit current value
Upper limit compressor operating frequency
–1 step/6 sec.
&
Outdoor unit current ≤ upper
limit current value
Upper limit compressor operating frequency
+1 step/2 min.
Outdoor unit current >
upper limit current value
Upper limit current (A)
Takes the following values depending on the outside temperature.
Also varies depending on model.
Overall current
(A)
Current A
Current B
Current C
25
28
43
50
Outdoor air temperature (˚C)
RZQG71LV1B
RZQG71-140LV1B
A
B
16.0 A
8.9 A
25.0 A
22.0 A
C
6.0 A
20.0 A
3.2.21 Freeze-up Prevention Control
The thermostat turns OFF due to indoor unit heat exchanger temperature in order to avoid
formation of ice on the indoor unit heat exchanger.
(For details, refer to “Freeze-up Prevention Control”.)
3.2.22 Shortage of Refrigerant Detection Control
When judged that the deficiency in performance has been caused by the shortage of refrigerant,
the abnormal stop is activated with the error code “U0” being displayed on the remote controller.
3.2.23 Piping and Wiring Incompatibility Detection Control
When the connecting pipe and the transmission connecting line are connected each to a
differing outdoor unit, the abnormal stop is activated with the error code “UF” being displayed on
the remote controller.
3.2.24 Pump Down Residual Operation (Only for RZQG100-140LV1B)
Conducts pump down residual operation when compressor stops to collect refrigerant in
evaporator for preventing liquid refrigerant from remaining in the evaporator.
Contents of Control
Compressor: 70 Hz
Electronic expansion valve: 0 pls
Ending Condition
OR
44
30 seconds elapsed with residual operation
Lp < 0.2 MPa
Function and Control
SiBE281013
Function Details
3.2.25 Oil Recovery Operation
When the compressor runs at low frequency for a long time, the failure of recovering oil may
cause the shortage of oil level. Therefore, the oil recovery operation is performed by increasing
the compressor operation frequency for five minutes.
∗ The more the unit operates at low frequency, the higher the frequency of oil recovery
operation becomes.
3.2.26 Defrost Operation
When in heating mode, a defrost operation will be conducted in order to avoid ice formation on
the outdoor unit heat exchanger.
Starting Conditions
Defrost will start when the following conditions have been realized:
• Integrated compressor running time is 25 minutes or more since the completion of the
previous defrost operation.
OR
• Defrost upper limit time A is met.
• Outdoor unit heat exchanger temperature is within the defrost request area.
&
Defrost conditions
Outdoor unit heat exchanger temperature (˚C)
5
-20
-15
-10
-5
-4
-7
-5
-8
-6
-9
-11
-7
-8
0
-3
-5
-6
2
5
-1
-4
When slightly quick defrost starting is set (Permit)
10
15
-1
-2
-8
-10
-10
-12
-13
-7
-14
Defrost permit
-17
area
-16
-15
-19
-20
Outdoor temperature (˚C)
Factory setting (Permit)
When slightly quick defrost starting is set (Request)
When slightly slow defrost starting is set (Permit)
Factory setting (Request)
When slightly slow defrost starting is set (Request)
-11
Defrost request
area
-21
-24
-28
-23
-25
-27
-30
Defrost upper limit A
Depending on the defrost start setting (field setting mode of the indoor unit remote controller),
frost upper limit time A becomes as shown in the table below.
Function and Control
Outdoor air temperature > -5°C
When quick
defrost starting is
set
40 minutes
Outdoor air temperature ≤ -5°C
40 minutes
Factory setting
When slow defrost
starting is set
2 hours
6 hours
6 hours
8 hours
45
Function Details
SiBE281013
Defrost Control
Defrosting complete
Defrosting start
previous control
A Hz
Compressor
Four way valve
0 Hz
ON
ON
OFF
Electronic
expansion valve
150
pls
480 pls
(wet protection control)
0 pls (5~60 sec.)
Outdoor unit fan
Indoor unit fan
ON
0 pls (5 sec.)
ON
OFF
ON
ON
OFF
Model
RZQG71LV1B
A
Step 25
RZQG100-140LV1B
Step 20
Defrost Ending Conditions
Defrosting ends when the following conditions have been realized. Note that defrosting can be
operated for 10 minutes at longest.
Hp: High pressure
Tb: Heat exchanger distributor pipe temperature
Tm: Intermediate heat exchanger temperature
&
OR
&
&
Defrost Time > 10 sec.
Hp > 2.45 MPa
Defrost Time > 1 min.
Tb > 10˚C
Tm > 12˚C
Defrost Time > 9 min.
Tb > 8˚C
Tm > 10˚C
3.2.27 Outdoor Unit Fan Control when Frost is Adhered
During heating, when frost has adhered to the outdoor unit heat exchanger and the ventilation
flue is blocked, the fan sound increases.
To prevent this fan noise from increasing, the number of revolutions of fan is lowered.
3.2.28 Emergency Operation
•
•
•
•
46
No transmission is performed between indoor and outdoor unit.
During cooling, the cycle of operation for 20 minutes and stop for 10 minutes is repeated.
During heating, defrost is performed once every one hour.
Under other conditions, the same control as the normal control is performed.
Function and Control
SiBE281013
Function Details
3.2.29 Simulated Operation Function
In case of a thermistor error, simulated operation is performed in two different ways as
shown below even while the error is detected.
A. Operation continues while the error code is displayed on the remote controller.
Applicable thermistors
· Outdoor air temperature thermistor
· Heat exchanger distribution pipe thermistor (in cooling)
· Intermediate heat exchanger thermistor (in heating)
· Liquid pipe thermistor
· Indoor suction air thermistor
· Indoor heat exchanger thermistor
B. Operation continues even the error is detected. The remote controller displays error code
only when the "Inspection/Test Run" button is pressed.
Applicable thermistors
· Remote controller thermistor
· Radiation fin thermistor
Note:
Function and Control
In case of a thermistor error other than A and B above, an abnormal stop is made and no
simulated operation is carried out.
Applicable thermistors
· Suction pipe thermistor
· Discharge pipe thermistor
· Heat exchanger distribution pipe thermistor (in heating)
· Intermediate heat exchanger thermistor (in cooling)
47
Function Details
SiBE281013
3.2.30 Test Operation Control
When operating in cooling mode for the first time after installation or operating in cooling mode
by pressing the indoor unit inspection button, the unit will perform a test operation for about 3
minutes.
∗ Make sure that the initial operation after installation is performed by the cooling operation.
(Until the test run is complete, the heating operation cannot be performed.)
Even when the heating operation is performed by pressing the test run button of the indoor
unit remote controller, "Test run mode" cannot be entered.
(The heating operation is performed with forced thermo. ON.)
Note:
48
&
(
• Cooling
• First operation
after installation
Cooling operation in
"Test operation mode"
for 3 minutes
Normal cooling
operation
&
(
• Cooling
• Test operation
button ON
Cooling operation in
"Test operation mode"
for 3 minutes
Cooling operation in
forced thermostat ON
&
(
• Heating
• First operation
after installation
Heating operation can
not be done.
&
(
• Heating
• Test operation
button ON
Heating operation in
forced thermostat ON.
• In the "Test run mode", errors will be determined all at once in order to detect problems of field
setting conditions such as a case that the opening of stop valve has been forgotten.
• During the test run, if the error code shown below is displayed, take measures according to
the instructions.
(1) When the error code E3, E4 or L8 is displayed on the remote controller, there is possibility
that either the stop valve is closed or the airflow outlet is obstructed.
(2) When the error code U2 is displayed on the remote controller, check for voltage
imbalance.
(3) When the error code U4 or UF is displayed on the remote controller, check the inter unit
branch wiring connection.
(4) When the error code L4 is displayed on the remote controller, there is possibility that the
airflow passage is closed.
• When there is no error code display, cooling operation continues.
(However, this control is once again performed after refrigerant is recovered by pump down
and at the time of the first ∗ operation after the outdoor unit PCB replacement.)
Function and Control
SiBE281013
Part 6
Field Setting
1. Test Operation ......................................................................................50
1.1
1.2
1.3
1.4
1.5
Pre-run Checks ......................................................................................50
Remote Controller Confirmation.............................................................50
Test Run.................................................................................................51
Precautions Regarding Test Run ...........................................................51
Failure Diagnosis at the Moment of First Installation .............................52
2. Field Setting from Remote Controller....................................................53
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
Wired Remote Controller........................................................................53
Wireless Remote Controller ...................................................................56
Overview of the Field Setting on the Outdoor Units ...............................57
Setting Contents and Code No. for Outdoor Units .................................62
Quiet (Low Noise) Operation..................................................................63
I-Demand Function.................................................................................65
Setting for Low Humidity Application......................................................66
Defrost Start Setting ...............................................................................70
3. Field Setting from Outdoor Unit PCB ....................................................71
3.1 Location of DIP Switch and BS Button ...................................................71
3.2 Field Setting for Outdoor Unit.................................................................72
4. Emergency Operation ...........................................................................77
4.1 Forced Operation ...................................................................................77
Field Setting
49
Test Operation
SiBE281013
1. Test Operation
WARNING
Note:
1.1
Live parts can be easily touched by accident.
Never leave the unit unattended during installation or servicing when the service panel is
removed.
Never perform a test run with the discharge piping thermistor (R2T) and suction piping
thermistor (R3T) removed, as this might break the compressor.
Do not touch the drain pump or fan if the indoor unit is operated without attaching the decoration
panel. (Doing so could result in an electric shock or other injury.)
Note that during the first running period of the unit, required power input may be higher. This
phenomenon originates from the compressor that requires a 50-hour run-in period before
reaching smooth operation and stable power consumption.
Pre-run Checks
Items to check
Electrical wiring
Inter-unit wiring
Earth wire
z Is the wiring as mentioned on the wiring diagram?
Make sure no wiring has been forgotten and that there are no missing
phases or reverse phases.
z Is the unit properly grounded?
z Is the wiring between units connected in series correct?
z Are any of the wiring attachment screws loose?
z Is the insulation resistance at least 1 MΩ?
- Use a 500 V mega-tester when measuring insulation.
- Do not use a mega-tester for low-voltage circuits.
Refrigerant piping
z Is the size of the piping appropriate?
z Is the insulation material for the piping attached securely?
Are both the liquid and gas pipes insulated?
z Are the stop valves for both the liquid side and the gas side open?
z Did you write down the extra refrigerant and the refrigerant piping length?
Extra refrigerant
Indoor unit
•
•
•
•
1.2
Be sure to perform a test run.
Be sure to fully open the liquid-side and gas-side stop valves. If you operate the unit with
stop valves closed, the compressor will break down.
Be sure to execute the first test run of the installation in cooling mode operation.
Never leave the unit unattended with an open front panel during test run.
Remote Controller Confirmation
•
•
50
z Is the indoor unit fully installed?
- When the test run is started, the fan automatically begins turning.
If a decoration panel is not attached, make sure that no work is being done
on the indoor unit.
- If you are using the wireless remote controller, do the test run after
attaching the decoration panel to the indoor unit.
The settings of the remote controller for the BRC1D series should be made in accordance
with the following procedure.
The settings of the remote controller for the BRC1E series should be made in accordance
with the attached manual.
Field Setting
SiBE281013
1.3
Test Operation
Test Run
1. Make sure the liquid and gas stop valves are open.
B
A
Opening direction
A
Liquid side
B
Gas side
Remove the cap and turn
counterclockwise with a
hex wrench until it stops
2. Be sure to close the front side panel before operation, as not doing so can cause electric
shock.
3. Be sure to turn power on at least 6 hours before starting operation in order to protect the
compressor.
4. Be sure to set the unit to cooling operation mode.
5. Press the inspection/test operation button of the remote controller 4 times (2 times in case of
a wireless remote controller) to go into the test run mode.
6. Press the ON/OFF button within 10 seconds to start the test run and check the operation
status for about 3 minutes. The refrigerant pressure may not rise immediately, even if the
stop valve is opened after an air purge is performed using a vacuum pump. This is because
the indoor unit refrigerant piping is closed off with electric valves inside. This will not create
any problems during operation.
7. Push the air flow direction adjust button and check if the unit is responding to the new air
flow direction position.
8. Press the inspection/test operation button of the remote controller 2 times to go into check
mode and to make sure that the malfunction code displays “00” (=normal). In case the
malfunction code does not display “00”, refer to “Failure diagnosis at the moment of first
installation” on page 52.
9. If the inspection/test operation button is pressed 4 times during a test run, the unit returns to
normal operation.
10.Check all functions according to the operation manual.
1.4
Precautions Regarding Test Run
1. In order to detect stop valves failing to open, operation of the unit is compulsorily performed
in cooling for 2-3 minutes during the first test run, even if the remote controller was set to
heating operation. In this case, the remote controller will have kept displaying the heating
symbol all the time and the unit will switch to heating operation automatically after elapse of
that time.
2. In case you cannot operate the unit in test run mode for any unusual reason, refer to “Failure
diagnosis at the moment of first installation” on page 52.
3. In case of a wireless remote controller, execute the test run only after having installed the
indoor unit decoration panel with infrared receiver first.
4. In case the panels of indoor units are not yet installed to the indoor units, make sure to shut
off the power supply after finishing the complete test run.
5. A complete test run surely includes shutting off power after having performed a normal
operation stop on the remote controller. Do not stop operation by turning circuit breakers off.
Field Setting
51
Test Operation
1.5
SiBE281013
Failure Diagnosis at the Moment of First Installation
•
•
•
•
•
•
52
In case nothing is displayed on the remote controller (the current set temperature does not
display), check for any of the following abnormalities before you can diagnose possible
malfunction codes.
• Disconnection or wiring error (between power supply and outdoor unit, between outdoor
unit and indoor units, between indoor unit and remote controller).
• The fuse on the outdoor unit PCB may have run out.
If the malfunction code “E3”, “E4”, “L8” or “U0” is displayed on the remote controller, there is a
possibility that the stop valves are closed.
If the malfunction code “E3”, “E4”, “L4” or “L8” is displayed on the remote controller, there is a
possibility that air inlet or air outlet are blocked.
If the malfunction code “U2” is displayed on the remote controller, check for voltage
imbalance.
If the malfunction code “U4” or “UF” is displayed on the remote controller, check the inter-unit
branch wiring connection.
If the malfunction code “UA” is displayed on the remote controller, there is a possibility that
connection is with incompatible indoor unit.
Field Setting
SiBE281013
Field Setting from Remote Controller
2. Field Setting from Remote Controller
Individual function of indoor unit can be changed from the remote controller. At the time of
installation or after service inspection / repair, make the local setting in accordance with the
following description.
Wrong setting may cause error.
(When optional accessory is mounted on the indoor unit, setting for the indoor unit may be
required to change. Refer to information in the option handbook.)
2.1
Wired Remote Controller
2.1.1 BRC1D528
Unit No.
Mode No.
Second
Code No.
Field
Setting
Mode
First
Code No.
3
4
1,7
6
5
2
1. When in the normal mode, press the “
” button for 4 seconds or more, and the Field Set
Mode is entered.
2. Select the desired Mode No. with the “
” button (2).
3. During group control, when setting by each indoor unit (mode No. 20, 22 and 23 have been
selected), press the “
” button (3) and select the Indoor Unit No to be set. (This
operation is unnecessary when setting by group.)
4. Press the “
” upper button (4) and select First Code No.
5. Press the “
” lower button (5) and select the Second Code No.
6. Press the “
” button (6) once and the present settings are Set.
7. Press the “
” button (7) to return to the Normal Mode.
(Example)
If during group setting and the time to clean air filter is set to Filter Contamination, Heavy, Set
Mode No. to “10” First Code No. to “0”, and Second Code No. to “02”.
Field Setting
53
Field Setting from Remote Controller
SiBE281013
2.1.2 BRC1E51A7
<Basic screen>
1 Press and hold Cancel button for 4
(1)
seconds or more.
Field setting menu is displayed.
2 Select
Field setting list in the field
setting menu, and press Menu/Enter
button.
Field setting list screen is displayed.
3 Highlight the mode, and select desired
“Mode No.” by using
button.
<Field setting menu screen>
(Up/Down)
4 In the case of setting per indoor unit
during group control (When Mode No.
such as 20 , 21 , 22 , 23 , 25 are
selected), highlight the unit No. and
select “Indoor unit No.” to be set by
using
(Up/Down) button. (In the
case of group total setting, this
operation is not needed.)
In the case of individual setting per
indoor unit, current settings are
displayed. And, Second Code No.
“ - ” means no function.
(2)
Press Menu/Enter button.
5 Highlight Second Code No. of the First
<Field setting screen>
In the case of group total
setting
In the case of individual
setting per indoor unit
(3)
(4)
(5)
(3)
(5)
Code No. to be changed, and select
desired “Second Code No.” by using
(Up/Down) button. Multiple
identical mode number settings are
available.
In the case of group total setting, all
of Second Code No. which may be
set are displayed as “ ∗ ”.
“ ∗ ” is changed to Second Code
No. to be set. And, Second Code
No. “ - ” means no function.
Second Code No.
First Code (SW) No.
Press Menu/Enter button.
54
Field Setting
SiBE281013
Field Setting from Remote Controller
6 Press Menu/Enter button. Setting
<Setting confirmation screen>
(6)
(7)
confirmation screen is displayed.
7 Select
Yes and press Menu/Enter
button. Setting details are determined
and field setting list screen returns.
8 In the case of multiple setting
changes, repeat “(3)” to “(7)”.
9 After all setting changes are
completed, press Cancel button twice.
Press Menu/Enter button.
Setting confirmation
10 Backlight goes out, and “Connection
under check Please wait for a
moment” is displayed for initialization.
After the initialization, the basic screen
returns.
CAUTION
z When an optional accessory is installed on the indoor unit, settings of the indoor
unit may be changed. See the manual of the optional accessory.
z For field setting details of the outdoor unit, see installation manual attached to the
outdoor unit.
Field Setting
55
Field Setting from Remote Controller
2.2
SiBE281013
Wireless Remote Controller
Mode No.
Field setting mode
UP button
DOWN button
RESERVE button
First code No.
MODE button
Second code No.
INSPECTION/TEST button
Setting
To set the field settings, you have to change:
„ “Mode No.”
„ “First code No.”
„ “Second code No.”.
To change the field settings, proceed as follows:
Step
1
56
Action
Hold down the INSPECTION/TEST button for at least 4 s during normal mode to enter
the “Field setting mode”.
2
3
Press the MODE button to select the desired “Mode No.”.
Press the UP button to select the “First code No.”.
4
5
Press the DOWN button to select the “Second code No.”
Press the RESERVE button to set the present settings.
6
Press the INSPECTION/TEST button to return to the “Normal mode”.
Field Setting
SiBE281013
2.3
Field Setting from Remote Controller
Settings Contents and Code No. for Indoor Units
Mode
No.
First
Code
No.
10 (20)
0
2
Filter cleaning sign interval Long life filter
Remote controller thermistor
2,500 hrs.
Enabled
1,250 hrs.
Disabled
—
—
—
—
3
2
Filter cleaning sign
Fan OFF at Thermostat OFF
Display
Normal
No display
OFF
—
—
—
—
3
4
Airflow rate setting during heating
Automatic operation mode control
Standard
Available
Slightly up
Prohibition
Up
—
—
—
3
5
Fan speed heating thermostat OFF
Automatic restart after power failure reset
LL-speed
Disabled
Set-speed
Enabled
—
—
—
—
6
Fan speed cooling thermostat OFF
High air outlet velocity (for high ceiling
applications)
LL-speed
Set-speed
—
—
Standard
Slightly up
Up
—
Selection of airflow direction
Airflow range setting
4-way flow
Upper
3-way flow
Normal
—
Lower
—
—
Individual setting of ventilation
Normal
Individual
operation
—
—
11 (21)
12 (22)
0
13 (23)
15 (25)
1
4 (∗2)
5
Note:
Second Code No.
Description of Setting
01
02
03
04
1. Settings are made simultaneously for the entire group, however, if you select the mode No.
inside parentheses, you can also set by each individual unit. Setting changes however
cannot be checked except in the individual mode for those in parentheses. (Even if the
setting are made for the entire group, the display always indicates "01".)
∗2. For FHQG, the second code No. of the "Airflow range setting is set at "03".
3. "88" may be displayed to indicate the remote controller is resetting when returning to the
normal mode.
2.3.1 Detailed Explanation of Setting Modes
Filter Cleaning Sign Interval
When "Display" is selected in "Filter cleaning sign" after the unit runs for certain time, "Filter
cleaning" will be displayed on the remote controller. This setting is used when the display
interval of "Filter cleaning" needs to be changed on occasions such as when the filter has been
heavily contaminated.
Mode No.
First Code
No.
Second
Code No.
Long Life Filter
10 (20)
0
01
02
2,500 hrs.
1,250 hrs.
Setting
Contamination Light
Contamination Heavy
Remote Controller Thermistor
Select the thermistor to control room temperature.
Mode No.
First Code
No.
10 (20)
2
Second
Code No.
01
02
Thermistor that controls room temperature
Room temperature thermistor in remote controller and
indoor unit suction air thermistor
Indoor unit suction thermistor
The factory setting for the Second Code No. is "02" and room temperature is controlled by the
indoor unit suction air thermistor.
When the Second Code No. is set to "01", room temperature is controlled by the indoor unit
suction air thermistor and the room temperature thermistor in remote controller as following
figures.
Field Setting
57
Field Setting from Remote Controller
SiBE281013
When using remote controller
Set temperature (˚C)
34
Cooling
32
30
28
Room temperature thermistor
Suction air thermistor
Suction air thermistor
Suction air thermistor
Suction air thermistor
26
24
22
20
Suction temperature (˚C)
12
14
16
18
20
22
24
26
28
30
32
34
Set temperature (˚C)
30
28
Heating
26
24
Suction air
Room temperature
thermistor
thermistor
Suction air thermistor
22
Suction air
thermistor
Room temperature
thermistor
Suction air thermistor
20
18
16
Suction temperature (˚C)
15
12
14
16
18
20
22
24
26
28
30
32
34
Filter Cleaning Sign
Whether or not to display "Filter Cleaning" after operation of certain duration can be selected.
58
Mode No.
First Code No.
Second Code No.
"Filter Cleaning" display
10 (20)
3
01
02
Display
No display
Field Setting
SiBE281013
Field Setting from Remote Controller
Airflow Rate
Set the airflow when thermostat OFF by the combination of "Fan OFF at Thermostat OFF"
11(21)-2," Fan speed heating thermostat OFF" 12(22)-3 and "Fan speed cooling thermostat
OFF" 12(22)-6.
A : 6 minutes OFF / 1 minute LL
B : 6 minutes OFF / 1 minute setting airflow
C : 6 minutes OFF / 1 minute L
Set the airflow by the combination of 3 modes as below.
Second Code No.
Mode No.
First Code No.
Factory
setting
11(21)
2
01
01
01
01
02
02
02
02
12(22)
3
01
01
02
02
01
01
02
02
12(22)
6
02
01
01
02
01
02
01
02
↓
↓
↓
↓
↓
↓
↓
↓
Cooling
When thermostat
OFF
Setting
LL
LL
Setting
A
B
A
B
Dry
When thermostat
OFF
C
C
C
C
C
C
C
C
When thermostat
OFF
LL
LL
Setting
Setting
A
A
Setting
Setting
When defrost hot
start
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Heating
Field setting
Airflow Rate Setting during Heating (FCQG Only)
For the purpose of securing airflow range during heating, the number of revolutions of fan during
heating can be changed. Make the setting according to installation environment.
Field Setting
Mode No.
First Code No.
11 (21)
3
Second Code No.
01
02
03
Standard
Slightly up
Up
59
Field Setting from Remote Controller
SiBE281013
Automatic Operation Mode Control
When selecting “Automatic Operation Mode” with the remote controller, conducts the most
comfortable operation in which you do not feel too cool or too hot.
Outdoor air temperature
Indoor air temperature
Temperature set by remote controller
Calculates and controls the optimum indoor
temperature
Automatic Restart after Power Failure Reset
For the air conditioners with no setting for the function, the units will be left in the stop condition
when the power supply is reset automatically after power failure reset or the main power supply
is turned on again after once turned off. However, for the air conditioners with the setting (same
as factory setting), the units may start automatically after power failure reset or the main power
supply turned on again (return to the same operation condition as that of before power failure).
For the above reasons, when the unit is set enabling to utilize “Auto restart function after power
failure reset”, utmost care should be paid for the occurrence of the following situation.
Caution 1. The air conditioner starts operation suddenly after power failure reset or
the main power supply turned on again. Consequently, the user might be
surprised (with question for the reason why).
2. In the service work, for example, turning off the main power switch during
the unit is in operation, and turning on the switch again after the work is
completed start the unit operation (the fan rotates).
Setting of Normal Airflow
Make the following setting according to the ceiling height. The setting position No. is set to “01”
at the factory.
„ FCQG71
Mode No.
First code No.
Second code No.
Ceiling height (m)
13 (23)
0
01
02
≤ 2.7
2.7 - 3.0
03
3.0 - 3.5
„ FCQG100-140
Mode No.
First code No.
Second code No.
01
Ceiling height (m)
≤ 3.2
13 (23)
0
02
03
3.2 - 3.6
3.6 - 4.2
Mode No.
First code No.
13(23)
0
Second code No.
01
Ceiling height (m)
≤ 2.7
02
2.7 - 3.5
Second code No.
01
Ceiling height (m)
≤ 3.8
02
3.8 - 4.3
„ FHQG71
„ FHQG100-140
60
Mode No.
First code No.
13(23)
0
Field Setting
SiBE281013
Field Setting from Remote Controller
Airflow Direction Setting
Set the air flow direction of indoor units as below. (Set when optional air outlet blocking pad has
been installed.)
Mode No.
First Code No.
13 (23)
1
Second Code No.
01
Setting
F : 4-direction air flow
02
T : 3-direction air flow
Airflow Range Setting
Make the following air flow direction setting according to the respective purpose.
Mode No.
13 (23)
First Code
No.
Second
Code No.
FCQG
FHQG
01
Draft prevention (Upward)
02
Standard
Draft prevention (Upward)
Dew condensation
prevention (Upward)
03
Ceiling soiling prevention
(Downward)
4
Standard (Downward)
∗ Some indoor unit models are not equipped with draft prevention (upward) function.
Individual Setting of Ventilation
This is set to perform individual operation of heat reclaim ventilation using the remote controller/
central unit when heat reclaim ventilation is built in.
(Switch only when heat reclaim ventilation is built in.)
Field Setting
Mode No.
First Code No.
15 (25)
5
Second Code No.
01
Setting
—
02
Individual operation of ventilation
61
Field Setting from Remote Controller
2.4
Overview of the Field Setting on the Outdoor Units
The table below contains the remote controller settings.
Remote
controller
settings
Mode
No.
SiBE281013
First
Code
No.
Description
Second Code No.
01
Details
02
03
04
05
0
Night time low
noise operation
Disabled
(Factory
setting)
Automatic
low noise
activation
Capacity
preceding
setting
(when
using
KRP58
option)
Automatic
low noise +
capacity
preceding
—
Refer to
P63.
1
Automatic low
noise start and
stop time
—
—
22h00 ~
06h00
22h00 ~
08h00
(Factory)
20h00 ~
08h00
Refer to
P63.
2
EDP room
setting
Disabled
(Factory
setting)
—
EDP room
setting
EDP room
setting +
no freeze
up
—
Refer to
P66.
3
Defrost starting
setting
Standard
(Factory
setting)
Defrost
slow
starting
setting
Defrost
quick
starting
setting
—
—
Refer to
P70.
16 (26)
Jumpers
The table below contains the jumper field settings.
Jumper
Label on PCB
(A1P)
Function
Details
JX5
JX5
Set as Cooling Only, For RZQG71·100LV1B
For RZQG125·140LV1B,
use the other PCB set as
Cooling Only (no JX5)
Factory settings
The table below contains the factory settings of all outdoor units
Mode No.
First Code No.
Second Code No.
0
01
1
04
2
01
3
01
26
62
Field Setting
SiBE281013
2.5
Field Setting from Remote Controller
Quiet (Low Noise) Operation
Purpose
Lower the operation sound of the outdoor unit.
Setting
Silent Operation can be activated by:
1. Automatic control (By field setting from remote controller)
2. External activation (from optional PCB KRP58M)
2.5.1 Quiet (Low Noise) Operation by Automatic Control
Table
Silent operation can be set by field setting from the wired remote controller:
Description
Silent
Operation
Low noise
start &
stop time
Mode
No.
16(26)
First
Code
No.
Second Code No.
0
OFF
Low noise
activation
—
Low noise
+ capacity
priority
—
1
—
—
22h00 ~
06h00
22h00 ~
08h00
20h00 ~
08h00
01
02
03
04
05
Method
When setting mode 16(26)-0-02, quiet (low noise) operation will be carried out by presuming the
current time in accordance with the outside temperature.
Automatic mode will start when the outdoor temperature is = average max of last 10 days -5°C
and will be conducted for 10 hours.
The maximum outdoor temperature is supposed to occur at 14:00h.
As the time judgement is made in accordance with the outdoor temperature, the above
mentioned timing is an estimation only.
Capacity Priority
Setting
When setting mode 16(26)-0-04, the low noise operation will be stopped when the heating or
cooling load increases. In that case, the operation will return to normal operation. The unit will
return to low-noise operation when the heating or cooling load decreases again.
Graph
Maximum
ambient
temperature
+8 hours
Start night
quiet
operation
+10 hours
End night
quiet
operation
Trend line indicating fluctuation of
outdoor ambient temperature in 24
hours.
Field Setting
63
Field Setting from Remote Controller
SiBE281013
2.5.2 External Activation from Optional PCB
Quiet (low noise) operation can also be activated from the optional PCB.
Transmission connector
(on outdoor PCB X6A)
Power supply connector
(on outdoor PCB X77A)
DS1
X81A
1234
ON
OFF
X80A
Graph
X800M
X801M
3
2
1 LNOP COM
Output on X801M = 12VDC, 12mA
Maximum wire length = 100 meter
X801M
3
2
1 LNOP
COM
Quiet (low noise) operation will start when the contact on LNOP-COM is closed and will remain
active as long as the contact is closed. No field setting on the outdoor unit or by remote
controller is required.
Quiet (low noise) operation will be ended when the contact is re-opened.
Use of the KRP58M enables the use of an external time clock.
Capacity priority
Setting
Same as with the automatic control, priority for capacity can be set. Prioirity for capacity will be
activated by changing field setting 26-0-03 in combination with the closed contact on KRP58M.
Description
Quiet (low noise)
operation
Exceptions
First
Code
No.
Mode
No.
16(26)
0
Second Code No.
01
02
03
04
Factory
setting
—
Capacity
priority
setting
—
The Quiet (low noise) operation will be overruled in the following conditions:
Pump down residual operation
Startup control
Defrost operation
Oil recovery
„
„
„
„
Sound reduction
Model
Sound reduction
64
RZQG71
RZQG100
RZQG125
RZQG140
4 dBA
4 dBA
5 dBA
5 dBA
Field Setting
SiBE281013
2.6
Field Setting from Remote Controller
I-Demand Function
Purpose
Setting
Set a limitation towards the power consumption from the system.(e.g. budget control, limit
power consumption during peak moments,..)
3 different demand setting can be selected by using terminal X801M:
„ Demand 1 → Close contact between COM and contact 1
„ Demand 2 → Close contact between COM and contact 2
„ Demand 3 → Close contact between COM and contact 3
DS1
Power supply connector
(on outdoor PCB X77A)
ON
OFF
X80A
X81A
1 2 3 4
Transmission connector
(on outdoor PCB X6A)
X800M
X801M
3
2
1
LNOP COM
Output on X801M =
12VDC, 12mA
Maximum wire length =
100 meter
X801M
3
Demand 1
2
1
LNOP
COM
Power consumption limitation in function of setting on DS1:
DS1 Setting
2
OFF
OFF
60%
ON
OFF
70%
OFF
ON
80%
ON
ON
100%
Demand 2
Power consumption limitation set to 40%.
Demand 3
Forced thermostat OFF.
Field Setting
Maximum Power
Consumption
1
65
Field Setting from Remote Controller
2.7
SiBE281013
Setting for Low Humidity Application
Purpose
Can be set when using the RZQG units for year round cooling in low humidity applications such
as computer rooms (EDP rooms), technical rooms, etc...to increase the capacity of the unit.
Definition of Low
Humidity Area
Relative
Humidity
(%)
Setting is only allowed in this area
Indoor side temperature DB (˚C)
Caution
When using the "LH settings" outside the "Low Humidity Area" there is an increased risk of ice
accumulation on the indoor coil or water blowing out from the indoor unit.
Function details
Factory setting
Low humidity application
setting
Low humidity application +
freeze up operation
prevention
Field Setting
16(26)-2-01
16(26)-2-03
16(26)-2-04
Compressor control
„ The compressor frequency is controlled in function of the target evaporating temperature.
„ The target evaporating temperature is controlled in function of the cooling load.
Freeze protection
function
Minimum target Te = 2°C
Minimum target Te = 0°C
Initial minimum target Te =
2°C, but can be changed in
function of actual Te, to avoid
freeze up activation:
„ Te ≤ -1°C for 20 minutes
accumulated => Change
target Te ≥ 5°C
„ Te ≤ -1°C for 30 minutes
accumulated => Change
target Te ≥ 8°C
See graph 1
See graph 2
See graph 3
Start
Te ≤ -1°C for 40 minutes
accumulated
OR
Te ≤ A°C for 1 minute
continuous
(Indoor decision)
Te ≤ -1°C for 40 minutes
accumulated
OR
Te ≤ -3°C for 1 minute
continuous
(Outdoor decision)
Te ≤ -1°C for 40 minutes
accumulated
OR
Te ≤ A°C for 1 minute
continuous
(Outdoor decision)
End
Te > 7°C for 10 minutes
continuously.
(Indoor decision)
Te > 7°C for 3 minutes
continuously
OR
Te > 4°C for 20 minutes
continuously
(Outdoor decision)
Te > 7°C for 3 minutes
continuously
OR
Te > 4°C for 20 minutes
continuously
(Outdoor decision)
Parameters
A
66
FCQG
FHQG
-5°C
-3°C
Field Setting
SiBE281013
Field Setting from Remote Controller
Graph 1
Target evaporating temperature control in case of factory setting 16(26)-2-01:
Te target acceptable area
Remote controller setting temp.
Te target limited ≤ 20˚C
(to protect the comp.)
Te target limited
≤ Indoor temp. – 11˚
(not to rising wetbulb)
Te (see note) target
acceptable area
„ Indoor temp. > setting
→ Te target down
„ Indoor temp. < setting
→ Te target up
Te target limited ≥ 2˚C
(not to freeze)
Te target limited
≥ Indoor temp. – 25˚
(not to sweat)
Freeze protection
(40 min. integrated coil temp. ≤ -1˚C)
Indoor Temp
(˚C DB)
Note:
Te by LP sensor
Field Setting
RZQG Series
67
Field Setting from Remote Controller
Graph 2
SiBE281013
Target evaporating temperature control when "low humidity application" is selected. Field
setting 16(26)-2-03:
Te target acceptable area
Remote controller setting temp.
Te target
Te target limited ≤ 20˚C
(˚C)
(to protect the comp.)
Te (see note) target acceptable area
„ Indoor temp. > setting → Te target down
„ Indoor temp. < setting → Te target up
Te target limited ≥ 0˚C
Freeze protection
(40 min. integrated coil temp. ≤ -1˚C)
Indoor Temp
(˚C DB)
Note:
Te by LP sensor
68
RZQG Series
Field Setting
SiBE281013
Field Setting from Remote Controller
Graph 3
Target evaporating temperature control when "low humidity application + freeze up operation
prevention" is selected. Field setting 16(26)-2-04:
Te target acceptable area
Te target
(˚C)
Remote controller setting temp.
Te target limited ≤ 20˚C
(to protect the comp.)
Te (see note) target acceptable area
„ Indoor temp. > setting → Te target down
„ Indoor temp. < setting → Te target up
Te target limited ≥ 2˚C
(not to freeze)
Freeze protection
(40min. integrated coil temp. ≤ -1˚C)
Indoor Temp
(˚C DB)
Note:
Te by LP sensor
RZQG Series
Change
thermostat
control
In order to increase continuous operation of the unit in low latent heat applications and avoid the
rise of temperature after thermostat OFF, the thermostat control will be changed when using
field settings 16(26)-2-03 & 16(26)-2-04.
Thermostat ON
„ ∆Trs ≥ 0.5 °C (No change from standard setting)
Thermostat OFF
„ ∆Trs ≤ -2.0 °C for 5 minutes continuously.
„ ∆Trs ≤ 4.5 °C
Field Setting
69
Field Setting from Remote Controller
Capacity
SiBE281013
When "low humidity application" is selected. Field setting 16(26)-2-03:
Indoor Temp. (°C-WB)
Outdoor
Temp.
(°C-DB)
11
-15
0.62
0.76
0.86
0.95
-10
0.62
0.76
0.86
-5
0.62
0.81
0
0.62
5
14
16
18
19
20
22
24
1.00
1.02
1.07
1.11
0.95
1.00
1.02
1.07
1.11
0.91
1.01
1.06
1.16
1.21
1.26
0.81
0.91
1.01
1.06
1.16
1.21
1.26
0.62
0.81
0.91
1.01
1.06
1.16
1.21
1.26
10
0.62
0.81
0.91
1.01
1.06
1.16
1.21
1.26
15
0.62
0.81
0.91
1.01
1.12
1.14
1.19
1.24
20
0.62
0.81
0.91
1.07
1.10
1.12
1.16
1.21
25
0.62
0.81
0.91
1.05
1.07
1.09
1.13
1.18
30
0.61
0.81
0.91
1.01
1.04
1.06
1.10
1.14
35
0.61
0.81
0.94
0.98
1.00
1.02
1.06
1.11
40
0.61
0.81
0.90
0.94
0.96
0.98
1.02
1.06
Capacity (% of standard point)
Capacity
When "low humidity application + freeze up operation prevention" is selected. Field setting
16(26)-2-04:
Indoor Temp. (°C-WB)
Outdoor
Temp.
(°C-DB)
11
-15
0.51
0.68
0.78
0.95
-10
0.51
0.68
0.78
-5
0.51
0.68
0
0.51
5
20
22
24
1.01
1.06
1.16
1.26
0.95
1.01
1.06
1.16
1.26
0.78
0.95
1.01
1.06
1.16
1.26
0.68
0.78
0.95
1.01
1.06
1.16
1.26
0.51
0.68
0.78
0.95
1.01
1.06
1.16
1.26
10
0.51
0.68
0.78
0.95
1.01
1.06
1.16
1.26
15
0.51
0.68
0.78
0.95
1.01
1.06
1.16
1.24
20
0.51
0.68
0.78
0.95
1.01
1.06
1.16
1.21
25
0.51
0.68
0.78
0.95
1.00
1.06
1.13
1.18
30
0.51
0.68
0.78
0.95
1.00
1.05
1.10
1.14
35
0.51
0.68
0.78
0.95
1.00
1.02
1.06
1.11
40
0.51
0.67
0.78
0.94
0.96
0.98
1.02
1.06
16
18
19
Capacity (% of standard point)
Note:
2.8
14
• Operation range on indoor side expanded from minimum 12°CWB to 11°CWB when using LH
setting.
• Do not use a setpoint below 20°C to avoid operation out of the indoor operation range
(11°CWB).
• Be sure to set the indoor fan to high speed.
Defrost Start Setting
Refer to ‘Defrost Operation’ on P45.
70
Field Setting
SiBE281013
Field Setting from Outdoor Unit PCB
3. Field Setting from Outdoor Unit PCB
3.1
Location of DIP Switch and BS Button
Various settings are available by using the DIP switches and the BS buttons on the PCB.
Display Lamp
H3P
MODE
TEST
HWL
H4P
H5P
X205A
L.N.O.P
H6P
H7P
DEMAND
COOL
H2P
ON
H1P
A2P
ON
Dip Switch
PUMPDOWN
HEAT
OFF
RETURN
BS4
SET
BS3
BS2
BS1
MODE
1 2
1 2
BS Button
Display
Symbol
Display
Lamp
Name
Function or Operating Procedure
During "Setting mode 1," the lamp is During "Monitor mode," the lamp
OFF (h).
blinks (l).
H1P
MODE
H2P
TEST
H3P
HWL
During test operation in "Setting
mode 1," the lamp is ON (k).
During "Monitor mode," the lamp is
When an error occurs during "Setting OFF (h).
mode 1," the lamp turns ON (k).
H4P
H5P
L.N.O.P
During "Setting mode 1," low noise
level is displayed.
DEMAND
During "Setting mode 1," demand
level is displayed.
BS1
MODE
Used to change "Setting mode".
BS2
BS3
SET
RETURN
Used to change "Setting item" and "Setting condition".
Used to decide "Setting item" and "Setting condition".
BS4
PUMP DOWN
Used for pump down operation, forced oil return operation and forced
defrost operation.
H6P
H7P
BS
Button
DS1-1
Dip
Switch
DS1-2
ON
OFF(∗1)
COOL
During "Monitor mode," various
combinations of the lamp indicate
the following conditions:
• Indication of oil return operation
• Indication of outdoor unit class
• Indication of error code (the latest
and up to 2 cycles before)
• Indication of causes of steppingdown
Switch from "OFF" to "ON" for emergency operation (forced operation).
EMERGENCY
HEAT(∗1)
Maintain "HEAT" in case of heating in emergency operation, and switch to
"COOL" in case of cooling in emergency operation.
∗1. Factory settings: "OFF" and "HEAT"
Note:
Field Setting
BS button (Pump down / Forced defrosting)
Pressing the BS button forcibly operates the air conditioner in the cooling mode.
1. To conduct a pump-down operation (sending refrigerant to outdoor unit), press the BS
button to forcibly operate the equipment in the cooling mode, then operate the unit for about
1 minute to stabilize the system. After stabilizing system, close the liquid pipe stop valve on
the outdoor unit, and after the pressure decreases and the low pressure sensor activates,
close the gas pipe stop valve.
2. Forced defrost
To activate the defrost operation during the heating operation, press the BS button. This will
activate the forced defrost operation (cooling operation).
When the defrost cancel conditions are met, the equipment automatically switches off the
defrost operation.
71
Field Setting from Outdoor Unit PCB
3.2
SiBE281013
Field Setting for Outdoor Unit
3.2.1 Setting by BS Buttons
With "Setting mode 1," "Setting mode 2" and "Monitor mode," various settings and data can be
checked.
(1) Setting mode 1
The initial status (normal operation) is "Setting mode 1." This mode indicates operating status "TEST (test operation)," "HWL (error)," "L.N.O.P (night time quiet operation)" or "DEMAND
(demand operation)."
(2) Setting mode 2
Each operating status can be modified.
(3) Monitor mode
This mode indicates "oil return operation," "outdoor unit class," "contents of retry," "contents of
error," "causes of stepping-down operation," etc.
Using the MODE button, the modes can be changed as follows.
Initial
Press the BS1 (MODE button) (Normal)
for 5 seconds or more.
Setting mode 1
Setting mode 2
Press the BS1(MODE button)
one time.
Monitor mode
Push the BS1(MODE button) one time.
On
Off
H1P
Blinking
H1P
H1P
3.2.2 Setting Mode 1
In this mode, the following conditions can be checked:
• Current operating condition (normal/test operation/line inspection and normal/error)
• Night time quiet operation condition (normal/low noise level 1, 2, and)
• Demand operating condition (normal/30% demand/40% demand/50% demand)
These conditions above can be checked by performing the following steps:
The system is normally "Setting mode
1".
Press the MODE (BS1) button once
to set the system to "Setting mode 1".
Check the system for each condition
through LED displays. (Refer to
information in table on the right.)
72
MODE TEST HWL
L.N.O.P
DEMAND
k: ON
l: OFF
h: BLINK
H1P H2P H3P H4P H5P H6P H7P
h
h
h
h
h
h
h
During "Setting mode 1," the lamp is always OFF.
Test operation display
hIn normal operation
kIn test operation
lIn line inspection operation
Error display
hNormal
kError
Night time quiet operation display
hhNormal operation
hkLow noise level 1
khLow noise level 2
kkLow noise level 3
Demand level display
hh30% Normal operation
hk40% Demand
kh50% Demand
kkDemand
Field Setting
SiBE281013
Field Setting from Outdoor Unit PCB
3.2.3 Setting Mode 2
In this mode, settings for the following items can be made.
Press the MODE (BS1) button for 5
seconds and set to “Setting mode 2”.
<Selection of setting conditions>
Press the SET (BS2) button and set to
the setting condition you want.
↓
Press the RETURN (BS3) button and
decide the condition.
<Selection of setting items>
Press the SET (BS2) button and set the
LED display to a setting item (∗1).
↓
Press the RETURN (BS3) button and
decide the item.
Press the RETURN (BS3) button and
set to the initial status of “Setting mode
2”.
∗ If you become unsure of how to proceed, push the MODE (BS1) button and return to setting mode 1.
Display of setting items
Display of setting condition
LED display
LED display
Setting item
Setting condition
H1P H2P H3P H4P H5P H6P H7P
H1P H2P H3P H4P H5P H6P
k h h h h k k 30% demand
k h h h k h
Demand 2
40% demand (factory
3 operation
k h h h h k
setting)
50% demand
k h h h h h
No.
28
Refrigerant
recovery mode
k h k k k h h OFF (factory setting)
ON
H7P
h
h
k
k h h h h h k
k h h h h k h
The figures in the columns under "No." represent the number of times to push the
SET (BS2) button.
„ Setting of Demand 2 operation
With this setting, compressor operation can be controlled to reduce power consumption.
(60% - 80% demand is available when a demand adapter (optional accessory) is used.)
Setting item
Setting condition
30% demand
Description
Operates with 30% of rated
power consumption.
Demand 2 operation 40% demand (factory setting) Operates with 40% of rated
power consumption.
Operates with 50% of rated
50% demand
power consumption.
[Work procedure]
Operating procedure
h: OFF l: BLINK k: ON
H1P H2P H3P H4P H5P H6P H7P
Push and hold the MODE (BS1) button of "Setting mode 1" for 5 seconds k h h h h h h
or more and set to "Setting mode 2."
Push the SET (BS2) button three times to set the LED display as shown
k h h h h k k
in the table on the right.
Push the RETURN (BS3) button once. (Present settings are displayed.) k
30% of rated power consumption k
Push the SET (BS2) button to set the LED
40% of rated power consumption k
display as shown in the table on the right.
50% of rated power consumption k
h h h h l h
h h h l h h
30% of rated power consumption k
Push the RETURN (BS3) button once to make a 40% of rated power consumption k
decision.
50% of rated power consumption k
Push the RETURN (BS3) button once again for execution. (The LED
k
display is in the initial status of "Setting mode 2".)
h h h k h h
h h h h k h
Push the MODE (BS1) button once to return to Setting mode 1 (normal
operation).
Field Setting
h h h h l h
h h h h h l
h h h h h k
h h h h h h
h h h h h h h
73
Field Setting from Outdoor Unit PCB
SiBE281013
„ Setting of Refrigerant Recovery Mode
When a refrigerant recovery unit is connected onsite to recover refrigerant, fully open the
expansion valve of the outdoor unit to help the recovery.
(1) Stop operation.
(2) Turn ON refrigerant recovery mode by performing the following steps.
h: OFF l: BLINK k: ON
H1P H2P H3P H4P H5P H6P H7P
Operating procedure
Press the MODE (BS1) button of "Setting mode 1" for 5 seconds or more
k h h h h h h
and set to "Setting mode 2."
Press the SET (BS2) button 28 times to set the LED display as shown in k h k k k h h
the table on the right. (∗1)
Press the RETURN (BS3) button once. (Present settings are displayed.) k h h h h h l
Press the SET (BS2) button once to set the LED display as shown in the k h h h h l h
table on the right.
Press the RETURN (BS3) button once to make a decision.
k h h h h k h
When the RETURN (BS3) button is pressed once again, the electronic
expansion valve opens fully.
k h h h h h h
(3) Connect a refrigerant recovery unit to perform refrigerant recovery.
(4) Upon completion of refrigerant recovery, turn OFF refrigerant recovery mode by taking the
following steps or turning OFF the power of outdoor unit.
Operating procedure
H1P H2P H3P H4P H5P H6P H7P
Press the SET (BS2) button 28 times to set the LED display as shown in k h k k k h h
the table on the right. (∗1)
Press the RETURN (BS3) button once. (Present settings are displayed.) k h h h h l h
Press the SET (BS2) button once to set the LED display as shown in the k h h h h h l
table on the right.
Press the RETURN (BS3) button once to make a decision.
k h h h h h k
When the RETURN (BS3) button is pressed once again, the electronic
expansion valve fully opens.
Note:
k h h h h h h
∗1: If you become unsure how many times you have pushed the button, push the MODE (BS1)
button once to return to "Setting mode 1" and start the operating procedure all over again.
74
Field Setting
SiBE281013
Field Setting from Outdoor Unit PCB
3.2.4 Monitor Mode
In this mode, the following items can be checked by using the BS buttons.
To enter the monitor mode, press the MODE
(BS1) button when in “Setting mode 1”.
No.
Setting item
l h h h h h h See Data display (1).
Indication of outdoor
l h h h h h k See Data display (2).
Contents of retry
(the latest)
Contents of retry
(1 cycle before)
Contents of retry
(2 cycle before)
Contents of malfunction
(the latest)
Contents of malfunction
(1 cycle before)
Contents of malfunction
(2 cycle before)
Indication of causes of
stepping-down operation
l h h h h k h
1 unit class
Press the SET (BS2) button and set the LED
display to a setting item.
2
3
4
<Confirmation on setting contents>
Press the RETURN (BS3) button to display
different data of set items.
5
6
7
10
Data display
Indication of oil return
0 operation
<Selection of setting item>
LED display
H1P H2P H3P H4P H5P H6P H7P
l h h h h k k
l h h h k h h See "Malfunction
code display" on the
l h h h k h k next page.
l h h h k k h
l h h h k k k
l h h k h k h See Data display (3).
The numbers in the "No." column represent the number of times to
Press the RETURN (BS3) button and switches
to the initial status of “Monitor mode”.
∗ Press the MODE (BS1) button and returns to
“Setting mode 1”.
press the SET (BS2) button .
Data display (1)
Display contents
In normal operation
In oil return operation
LED display
H1P H2P H3P H4P H5P H6P H7P
h h h h h h
l h h h h h l
l
Data display (2)
Display contents
No setting
RZQG71LV1B
RZQG100LV1B
RZQG125LV1B
RZQG140LV1B
LED display
H1P H2P H3P H4P H5P H6P H7P
l
l
l
l
l
h
h
h
h
h
h
h
h
h
h
h
h
l
l
l
h
l
h
h
h
h
l
h
h
l
l
l
h
l
h
Data display (3)
Display contents
Field Setting
LED display
H1P H2P H3P H4P H5P H6P H7P
Normal (not in stepping-down
l
operation)
h h h h h l
Low pressure stepping-down l
h h h h l h
High pressure stepping-down l
Inverter discharge pipe
l
stepping-down
Inverter current steppingl
down
Radiation fin temperature
l
stepping-down
h h h h l l
h h h l h h
h h h l h l
h h h l l h
Inverter stepping-down
l h h h l l l
Overall current steppingdown
l h h l h h h
Other stepping-down
l h h l h h l
75
Field Setting from Outdoor Unit PCB
SiBE281013
3.2.5 List of Contents of Retry and Error
Take the following steps to check contents of retry and error.
To enter "Monitor mode," press the MODE (BS1)
button when in "Setting mode 1."
<Display of RETURN 2>
When SET (BS2) button is pressed, the LED
display for RETURN 2 turns ON.
<Selection of retry or error item>
<Display of RETURN 3>
Press the SET (BS2) button to set the LED
display to retry or error item.
When SET (BS2) button is pressed, the LED
display for RETURN 3 turns ON.
Press the RETURN (BS3) button to return the
system to the initial state of "Monitor mode."
<Display of RETURN 1>
When the RETURN (BS3) button is pressed, the
LED display for RETURN 1 turns ON.
∗ Pressing the MODE (BS1) button will bring the
system to the "Setting mode 1."
k: ON h: OFF l: BLINK
Error
code
Contents of retry or malfunction
Confirmation 2
Confirmation 3
C4
Indoor heat exchanger thermistor
l l k h h h l h l l k h h l h h l l k k h h h h
E1
Faulty outdoor unit PCB
l l h k h h l l l l k h h h h l l l k k h h h h
E3
Abnormal high pressure
l l k h h h l l l l k k h h h h
E4
Abnormal low pressure
l l k h h l h h l l k k h h h h
E5
Compressor motor lock
l l k h h l h l l l k k h h h h
DC motor 1 lock
E7
76
Confirmation 1
HAP H1P H2P H3P H4P H5P H6P H7P HAP H1P H2P H3P H4P H5P H6P H7P HAP H1P H2P H3P H4P H5P H6P H7P
Abnormal outdoor DC motor 2 lock
fan motor
Abnormal inverter transmission
l l k h h l l l l l k k h h h l
l l k k h h l h
l l k k h h l l
l l k h l h h l l l k k h h h l
E9
Abnormal electronic Disconnected electronic expansion valve connector
expansion valve
Malfunction due to wet conditions
F3
Abnormal discharge Abnormal discharge pipe temperature l l h k h l h l l l k h h h l l l l k k h h h l
pipe temperature Disconnected discharge pipe thermistor
l l k k h h l h
H3
Abnormal high pressure switch
H9
Abnormal outdoor air thermistor
J1
Abnormal pressure sensor
J3
Abnormal discharge pipe thermistor
l l k h h h l l l l k k h h h h
J5
Abnormal suction pipe thermistor
l l k h h l h l l l k k h h h h
J6
Abnormal heat exchanger distributor pipe thermistor
l l k h h l l h l l k k h h h h
J7
Abnormal intermediate heat exchanger thermistor
l l k h h l l l l l k k h h h h
J8
Abnormal liquid pipe thermistor
L1
PCB failure
L4
Elevated radiation fin temperature
l l k h h l h h l l k k h h h h
L5
Compressor instantaneous overcurrent
l l k h h l h l l l k k h h h h
L8
Compressor overload
l l k h l h h h l l k k h h h h
L9
Compressor lock
l l k h l h h l l l k k h h h h
LC
Abnormal transmission (between the control and the inverter)
P1
Unbalanced power supply voltage
l l k k h h l h
l l h k h l h h l l k h h h l l l l k k h h h h
l l k h l h h l l l k k h h h h
l l h k h l l h l l k h h h h l l l k k h h h h
l l k h l h h h l l k k h h h h
l l h k h l l l l l k h h h h l l l k k h h h h
l l k h l l h h l l k k h h h h
l l h k l h h h l l k h h h h l l l k k h h h h
l l k h h l h h l l k k h h h h
P4
Abnormal radiation fin thermistor
PJ
Faulty capacity setting
U0
Abnormal
refrigerant
shortage
U2
Abnormal power Inverter undervoltage and overvoltage
supply voltage
SP-PAM overvoltage
l l k h h h l h l l k k h h h l
U4
Abnormal transmission (between indoor and outdoor units)
l l k h h l h h l l k k h h h h
UA
Faulty field setting switch
l l k h l h l h l l k k h h h h
UF
Improper piping and improper communication wiring
Refrigerant shortage warning
Abnormal refrigerant shortage
l l k h l l h l l l k k h h h h
l l h k l h h l l l k h h h h h l l k k h h h l
l l k k h h l h
l l k k h h l h
l l l l l l k k h h h h
Field Setting
SiBE281013
Emergency Operation
4. Emergency Operation
4.1
Forced Operation
As emergency operational methods, there are three methods as shown below. Choose the best
method that is suitable for each purpose of use.
Operation
Name
Emergency
(1) operation
(Forced
operation)
Test
(2) Operation
Emergency
(3) operation
Application Setting method
Forced
operation
in service
By SS1 switch
of indoor unit
PCB
By DS switch of
outdoor unit
PCB
By Inspection /
Test Operation
button of the
remote
controller
When
checking
the
operation
By Test
after
installation Operation
button of
outdoor PCB
Press the
When the "Emergency
wireless
operation"
remote
switch of the
controller
indoor unit
is lost
panel.
Thermistor
detection
Activation
of
protection
device
Fan
Drain
Pump
×
×
k
k
Remark
No temperature
control
×
×
k
—
×
k
k
k
No temperature
control
k
k
k
k
Remote controller
transmission stop,
actuators such as fan
and pump are ON
Emergency Operation (Forced operation)
1. Turn off the power supply.
2. Changeover the switch of indoor unit PCB (SS1) from NORM (Normal) to EMG
(Emergency).
NORM.
EMG.
Factory setting
NORM.
EMG.
Emergency operation
3. Changeover the switches of outdoor unit PCB (DS1) as shown below.
1
12
Cooling
2
HEAT
2
OFF
Factory setting
ON
HEAT
1
OFF
OFF
2
12
COOL
ON
ON
HEAT
1
COOL
ON
COOL
ON
ON
12
Heating
4. When the power is turned ON, the operation will be forcibly activated.
(Precautions)
1. Make sure that the power is turned off before changing the switch.
2. When returning to the normal operation, make sure that the power is turned off before
returning each switch to the original position.
3. When the protection device is activated during the emergency operation, the unit stops the
operation once and restarts three minutes later.
4. When there is an error on PCB, the emergency operation cannot be used.
Field Setting
77
Emergency Operation
SiBE281013
Operation by the Test Operation Mode
As test run by the test operation mode, there are two methods as shown below.
<Test Operation by Wireless Remote Controller>
1. Press the Inspection / Test Operation button 4 times.
Press the Inspection / Test
Operation button 4 times.
Normal
Test operation mode
2. When you press the [ON / OFF] button after setting the test run mode, the test run starts.
<Test Operation by Outdoor Unit PCB>
1. Press the Test Operation (BS4) button on outdoor unit PCB for 5 seconds. After a while, the
test operation starts.
(Reference)
• For the initial operation after installation of the unit, forced cooling operation continues for
three minutes.
• For the second operation and afterwards after installation, the unit forcibly operates for 30
minutes in the set mode.
78
Field Setting
SiBE281013
Part 7
Service Diagnosis
1. Maintenance Inspection ........................................................................81
1.1 Overview ................................................................................................81
2. Symptom-based Troubleshooting .........................................................83
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
2.12
Overview ................................................................................................83
Equipment does not Operate .................................................................84
Indoor Unit Fan Operates, but Compressor does not Operate ..............86
Cooling / Heating Operation Starts but Stops Immediately ....................88
After Unit Shuts Down, It cannot be Restarted for a While ....................89
Equipment Operates but does not Provide Cooling ...............................91
Equipment Operates but does not Provide Heating ...............................93
Equipment Discharges White Mist .........................................................95
Equipment Produces Loud Noise or Vibration .......................................96
Equipment Discharges Dust...................................................................97
Remote Controller LCD Displays "88" ....................................................98
Swing Flap does not Operate.................................................................99
3. Troubleshooting by LED Indications ...................................................101
3.1 Troubleshooting by LED on the Indoor Unit .........................................101
3.2 Troubleshooting by LED on Outdoor Unit PCB ....................................101
4. Troubleshooting by Remote Controller ...............................................102
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
4.11
4.12
4.13
4.14
4.15
4.16
4.17
4.18
4.19
4.20
4.21
4.22
4.23
4.24
4.25
Service Diagnosis
Procedure of Self-diagnosis by Remote Controller ..............................102
Error Codes and Description ................................................................106
Safety Devices .....................................................................................107
Indoor Unit PCB Abnormality ...............................................................108
Drain Water Level System Abnormality................................................109
Indoor Unit Fan Motor Abnormality ......................................................111
Capacity Setting Abnormality ...............................................................112
Transmission Error (between Indoor Unit PCB and Adaptor PCB) ......113
Thermistor Abnormality ........................................................................115
Humidity Sensor System Abnormality ..................................................116
Remote Controller Thermistor Abnormality ..........................................117
Outdoor Unit PCB Abnormality.............................................................118
High Pressure Abnormality (Detected by the High Pressure Switch)...119
Actuation of Pressure Sensor...............................................................123
Compressor Motor Lock .......................................................................125
Outdoor Unit Fan Motor Abnormality....................................................126
Electronic Expansion Valve Abnormality..............................................128
Discharge Pipe Temperature Control...................................................131
High Pressure Switch System Abnormality ..........................................133
Thermistor System Abnormality ...........................................................134
Outdoor Unit PCB Abnormality.............................................................135
Radiation Fin Temperature Rise ..........................................................137
Output Overcurrent Detection ..............................................................139
Electronic Thermal (Time Lag) .............................................................141
Stall Prevention (Time Lag)..................................................................143
79
SiBE281013
4.26 Transmission System Abnormality
(between Control and Inverter PCB) ....................................................145
4.27 Open Phase or Power Supply Voltage Imbalance ...............................146
4.28 Defective Capacity Setting ...................................................................147
4.29 Refrigerant Shortage (Alert) .................................................................148
4.30 Refrigerant Shortage (Error).................................................................149
4.31 Power Supply Voltage Abnormality ......................................................151
4.32 Transmission Error between Indoor and Outdoor Unit.........................153
4.33 Transmission Error Between Remote Controller and Indoor Unit ........156
4.34 Transmission Error between MAIN Remote Controller and
SUB Remote Controller........................................................................157
4.35 Field Setting Switch Abnormality..........................................................158
4.36 “UC” Address Duplication of Centralized Controller...............................160
4.37 Transmission Error Between Centralized Controller and
Indoor Unit............................................................................................161
4.38 Transmission Error between Indoor and Outdoor Unit / Piping and
Wiring Mismatch / Refrigerant Shortage ..............................................163
4.39 Check ...................................................................................................165
80
Service Diagnosis
SiBE281013
Maintenance Inspection
1. Maintenance Inspection
1.1
Overview
When performing maintenance, you should at least perform the following inspections:
Indoor unit
Transmission wiring between
indoor and outdoor units
Is the air filter dirty?
What about switch capacity?
What about cable thickness?
What about voltage and current?
To dedicated
breaker
Refrigerant piping
Drain piping
Outdoor unit
Earth
Guide Lines for Optimal Operation Condition
The operation value guide lines when operating under standard conditions by pushing the test operation
button on the remote controller are as given in the table below.
Indoor unit fan: H tap
High
Pressure
Low
Pressure
Discharge
Pipe
Temperature
Suction
Temperature
Indoor Unit:
Temperature
Differential
between Suction
Air and
Discharge Air
Outdoor Unit:
Temperature
Differential
between Suction
Air and
Discharge Air
Cooling
2.62 MPa ~
3.39 MPa
0.60 MPa ~
0.98 MPa
60°C~100°C
–2°C~10°C
8°C~18°C
7°C~12°C
Heating
2.53 MPa ~
3.27 MPa
0.53 MPa ~
0.75 MPa
60°C~100°C
–6°C~2°C
14°C~30°C
2°C~6°C
Standard Conditions
Cooling Operation
Indoor
27°CDB/19°CWB
Outdoor
35°CDB
Heating Operation
20°CDB
7°CDB/6°CWB
During or after maintenance, when the power supply is turned back on, operation restarts automatically by the
“auto restart function.” Please exercise the proper caution.
Service Diagnosis
81
Maintenance Inspection
SiBE281013
Correlation of Air-Conditioner’s Operation Status and Pressure / Running Current
What happens in comparison to normal values is summarized in the table below.
(Measured for 15 ~ 20 minutes or more after operation starts.)
Cooling
Air-Conditioner Status
Air Filter Fouling
Short Circuit of Indoor Unit Inlet/Outlet
Air
Outdoor Unit Fin Fouling
Short Circuit of Outdoor Unit Inlet/Outlet
Air
Air Mixed in Refrigerant
Low Pressure
Lower
High Pressure
Lower
Running Current
Lower
Lower
Lower
Lower
Higher
Higher
Higher
Higher
Higher
Higher
Higher
Higher
Higher
Water Mixed in Refrigerant
Dirt Mixed in Refrigerant
Lower ∗1
Lower ∗2
Lower
Lower
Lower
Lower
Refrigerant Shortage
Unsatisfactory Compression
Lower
Higher ∗3
Lower
Lower
Lower
Lower
Heating
Air-Conditioner Status
Low Pressure
High Pressure
Running Current
Air Filter Fouling
Short Circuit of Indoor Unit Inlet/Outlet
Air
Higher
Higher
Higher
Higher
Higher
Higher
Outdoor Unit Fin Fouling
Short Circuit of Outdoor Unit Inlet/Outlet
Air
Lower
Lower
Lower
Lower
Lower
Lower
Air Mixed in Refrigerant
Water Mixed in Refrigerant
Higher
Lower ∗1
Higher
Lower
Higher
Lower
Dirt Mixed in Refrigerant
Refrigerant Shortage
Lower ∗2
Lower
Lower
Lower
Lower
Lower
Unsatisfactory Compression
Higher ∗3
Lower
Lower
Note:
∗1. Water in the refrigerant freezes inside the capillary tube or electronic expansion valve, and is basically the
same phenomenon as pump down.
∗2. Dirt in the refrigerant clogs filters inside the piping, and is basically the same phenomenon as pump
down.
∗3. Pressure differential between high and low pressure becomes low.
82
Service Diagnosis
SiBE281013
Symptom-based Troubleshooting
2. Symptom-based Troubleshooting
2.1
Overview
1
2
3
4
5
6
Symptom
Equipment does not operate.
Details of Measures
Refer to P.84
Indoor fan operates, but compressor does not
operate.
Cooling/heating operation starts but stops
immediately.
Refer to P.86
Refer to P.88
After unit shuts down, it cannot be restarted for a Refer to P.89
while.
Equipment operates but does not provide
Refer to P.91
cooling.
7
Equipment operates but does not provide
heating.
Equipment discharges white mist.
Refer to P.95
8
9
Equipment produces loud noise or vibration.
Equipment discharges dust.
Refer to P.96
Refer to P.97
10
11
Remote controller LCD displays “88”.
Indoor swing flap does not operate.
Refer to P.98
Refer to P.99
12
Equipment emits odor.
13
Flap operates when power is turned on.
Room smell and cigarette odors accumulated
inside the indoor unit are discharged with air.
Inside of the indoor unit must be cleaned.
It is normal. The flap initializes for accurate
positioning.
14
Change of operation mode causes flap to move. It is normal. There is a control function that
moves the flap when operation mode is changed.
Fan operates in “M” tap during heating even if
It is normal. It is caused by the activation of the
remote controller is set to “L” tap.
overload control (airflow shift control).
15
16
17
Refer to P.93
Flap automatically moves during cooling.
It is normal. It is caused by the activation of the
dew condensation prevention function or ceiling
soiling prevention function.
Indoor unit fan operates in “L” tap for 1 minute in It is normal. The monitoring function forcibly
“program dry” mode even if compressor is not
operates the fan for 1 minute.
operating.
18
Indoor unit fan operates after heating operation
stops.
19
Drain pump operates when equipment is not
operating.
It is normal. The fan operates in the “LL” tap for
60 to 100 seconds to dissipate the residual heat
in the heater.
It is normal. The drain pump continues to operate
for several minutes after equipment is turned off.
20
Horizontal swing sends air to different directions
in cooling and heating even if it is set to the same
position.
Flap remains horizontal even if it is set to swing
mode.
It is normal. The airflow direction in cooling/dry
operation is different from that in heating/fan
operation.
It is normal. The flap does not swing in the
thermostat OFF mode.
21
22
Service Diagnosis
When operating in remote control thermostat, the Normal operation.
thermostat turns off before temperature of
The thermostat may be controlled with the
remote control reaches the set temperature.
suction temperature (body thermostat),
concurrently with the set temperature.
83
Symptom-based Troubleshooting
2.2
Equipment does not Operate
Applicable Model
All models of SkyAir series
Supposed
Causes
„
„
„
„
„
„
„
„
„
„
„
„
84
SiBE281013
Fuse blown or disorder of contact in operation circuit
Defective operation switch or contact point
Defective high pressure switch
Defective magnetic switch for fan motor
Activation or fault of overcurrent relay for fan motor
Defective overcurrent relay for compressor
Defective compressor protection thermostat
Insufficient insulation in electric system
Defective contact point of magnetic switch for compressor
Defective compressor
Defective remote controller or low batteries (wireless)
Incorrect address setting of wireless remote controller
Service Diagnosis
SiBE281013
Symptom-based Troubleshooting
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is the power
switch OFF or fuse for power
switch blown?
YES
NO
Is there power failure?
YES
Turn ON the power switch or
replace the fuse.
If high-harmonics circuit breaker
is not used on the inverter
compressor, replace the circuit
breaker.
Wait until power returns.
NO
Is the operation switch
pressed repeatedly?
YES
NO
Is the thermostat changed
and reset again?
YES
NO
Is the operation
lamp on LCD remote controller
blinking?
YES
Normal. Equipment starts
operation 3 minutes later (3-min.
standby).
Normal. Equipment starts
operation 3 minutes later (3-min.
standby).
Diagnose based on error code
on remote controller.
NO
Is the operation lamp
on indoor unit signal receiving
part blinking?
YES
Diagnose based on error code
on remote controller.
NO
Defective electric component
Service Diagnosis
Check the electric system.
85
Symptom-based Troubleshooting
2.3
Indoor Unit Fan Operates, but Compressor does not
Operate
Applicable Model
All models of SkyAir series
Supposed
Causes
„
„
„
„
„
„
86
SiBE281013
Fuse blown or disorder of contact in operation circuit
Defective thermistor
Defective indoor/outdoor unit PCB
Defective magnetic switch
Defective power transistor
Defective compressor
Service Diagnosis
SiBE281013
Symptom-based Troubleshooting
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
· Indoor unit fan runs at set airflow rate.
· (In cooling operation)
When suction air thermistor temperature is higher than set temperature
· (In heating operation)
When suction air thermistor temperature is lower than set temperature
Is the power
switch OFF or the fuse for power
switch blown?
YES
Turn ON the power switch or
replace the fuse.
NO
Is the heating
switch turned ON at outdoor
temperature > 32˚C
YES
Normal.
(Thermostat OFF by outdoor
temperature)
NO
(1)
Is rated voltage
applied at the compressor
terminals?
YES
Replace the compressor.
NO
(2)
Is rated voltage
output from the magnetic switch
or power transistor?
YES
Replace the magnetic switch or
power transistor.
NO
(3)
Is rated voltage output
from the PCB?
YES
Replace the PCB.
NO
Suction air
thermistor
Check the thermistor.
Outdoor unit
PCB
Indoor unit
PCB
Input
to
PCB
Service Diagnosis
Magnetic
switch
Relay
Output
from
PCB
Input
to
PCB
COMP
(3)
Output from
relay or
microcomputer
(2)
Output from
magnetic
switch or SW
circuit of
power
transistor
(1)
Output from
magnetic
switch or
U,V,W of
power
transistor
87
Symptom-based Troubleshooting
2.4
SiBE281013
Cooling / Heating Operation Starts but Stops Immediately
Applicable Model
All models of SkyAir series
Supposed
Causes
„
„
„
„
„
„
„
„
„
„
„
„
Overcharge of refrigerant
Air mixed in refrigerant system
Defective pressure switch
Defective magnetic switch for outdoor unit fan motor
Defective aux. relay for outdoor unit fan motor
Soiled heat exchanger of outdoor unit
There is an interfering item in airflow of outdoor unit.
Defective outdoor unit fan
Soiled air filter of indoor unit
Soiled heat exchanger of indoor unit
There is some interfering item in airflow of indoor unit.
Defective indoor unit fan
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is the type
of remote controller wired
or wireless?
wired
Wireless
Is the
operation lamp of
indoor unit signal receiving
part flashing?
Is the operation
lamp of remote controller
flashing?
YES
Diagnose based on the error
code on remote controller
NO
YES
Heating: Indoor
NO
unit
Cooling: Outdoor
unit
Does the fan rotate?
NO
YES
Is the filter soiled?
YES
Defective fan motor. Check the
magnetic switch and auxiliary
switch for fan motor.
Cleaning
NO
Is there any item
interfering airflow?
YES
Remove the interfering item.
NO
Is the heat
exchanger soiled?
YES
Cleaning of the heat exchanger
NO
Possible causes as follows:
* Refrigerant overcharge
* Mixing of air in refrigerant system
* Defective pressure switch
88
After vacuum drying, charge
correct amount of refrigerant.
Check the pressure switch.
Service Diagnosis
SiBE281013
2.5
Symptom-based Troubleshooting
After Unit Shuts Down, It cannot be Restarted for a While
Applicable Model
All models of SkyAir series
Supposed
Causes
„ Overcurrent relay (for compressor)
Service Diagnosis
Overcurrent relay may act due to the following reasons
Lower voltage of power supply
Excess level of high pressure
Insufficient size of power cable
Defective compressor
„ Compressor protection thermostat
Compressor protection thermostat may act due to the following reasons
Internal leakage of four way valve (There is no difference between suction and discharge
temperature)
Insufficient compression of compressor
Incorrect refrigerant
Defective electronic expansion valve
Insufficient circulation of refrigerant
89
Symptom-based Troubleshooting
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Turn the operation switch ON and
OFF, then wait at ON side.
Does the
unit start operation after
3 minutes?
YES
Normal. Unit is in 3-min standby
mode.
NO
Is the
discharge side of compressor hot
after unit stop?
NO Not so hot
Check the compressor.
YES
Check on the cause why overcurrent
relay (for compressor) or compressor
protection thermostat acted.
[Electric system]
Power supply
voltage is within ±10 % of
specified voltage.
NO
Contact the power company.
YES
Is the size
of power cable through total
length correct?
NO
Replace the power cable.
YES
[Refrigerant circuit]
After vacuum drying, charge correct
amount of refrigerant. Then, start
operation again.
Is there
any temperature difference
between inlet and outlet of
electronic expansion
valve?
NO
Defective electronic expansion
valve
YES
Is there
any temperature difference
between suction side and
discharge side of four
way valve?
NO
Defective four way valve
YES
Defective compressor
90
Check the compressor.
Service Diagnosis
SiBE281013
2.6
Symptom-based Troubleshooting
Equipment Operates but does not Provide Cooling
Applicable Model
All models of SkyAir series
Supposed
Causes
„ Overcurrent relay (for compressor)
Service Diagnosis
Overcurrent relay may act due to the following reasons
Lower voltage of power supply
Excess level of high pressure
Insufficient size of power cable
Defective compressor
„ Compressor protection thermostat
Compressor protection thermostat may act due to the following reasons
Internal leakage of four way valve (There is no difference between suction and discharge
temperature)
Insufficient compression of compressor
Incorrect refrigerant charge/leak
Defective electronic expansion valve
Insufficient circulation of refrigerant
„ Defective thermistors or thermistor out of position
91
Symptom-based Troubleshooting
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Measure the temperature of suction
air and discharge air. Temperature
difference = Suction air temp. –
Discharge air temp.
Temperature
difference for cooling should be
between 8 and 18˚C.
YES
YES
Normal.
NO
NO
Does
any frost
generate around inlet
port of indoor unit heat exchanger
or outlet port of electronic
expansion
valve?
Does the heat
load increase after installation
of the unit?
Possible causes as follows
* Incorrect selection of model
* Affection of direct sun
YES
Is the
operation current less than
specified level?
Additional unit installation
should be considered.
YES
NO
NO
Refrigerant shortage possibly
generates trouble.
Does indoor unit
airflow rate down?
YES
* Clogged air filter
* Soiled heat exchanger
* Defective fan motor
(Refer to troubleshooting “A6”.)
After vacuum drying, charge
correct amount of refrigerant.
Check the each section.
NO
Is the
level of high pressure higher
than normal level?
NO
Possible causes as follows
* Insufficient compression of
compressor
* Insufficient circulation of refrigerant
* Defective electronic expansion valve
92
YES
Possible causes as follows
* Refrigerant overcharge
* Air in refrigerant system
* Soiled heat exchanger
* Short circuit of supply air
* Disturbing item in airflow
* Defective fan motor of outdoor unit
(Refer to troubleshooting “E7”.)
Check the each item.
Check the each item.
Service Diagnosis
SiBE281013
2.7
Symptom-based Troubleshooting
Equipment Operates but does not Provide Heating
Applicable Model
All models of SkyAir series
Supposed
Causes
„
„
„
„
„
„
„
„
„
„
„
„
Service Diagnosis
Overcharge of refrigerant
Air mixed in refrigerant system
Defective pressure switch
Defective magnetic switch for outdoor unit fan motor
Defective aux. relay for outdoor unit fan motor
Soiled heat exchanger of outdoor unit
There is an interfering item in airflow of outdoor unit.
Defective outdoor unit fan
Soiled air filter of indoor unit
Soiled heat exchanger of indoor unit
There is an interfering item in airflow of indoor unit.
Defective indoor unit fan
93
Symptom-based Troubleshooting
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is this first starting
after installation?
YES
This is normal. Heating
operation will be conducted after
2 or 3 minutes (∗).
NO
Is the unit in defrost mode?
YES
Wait for a while.
No abnormality
NO
Measure the temperature of suction
air and discharge air. Temperature
difference = Suction air temp. –
Discharge air temp.
Temperature
difference for heating should be
between 14 and 30˚C.
Does the
heat load increase after
installation of the unit?
YES
NO
No abnormality
NO
* Incorrect selection of model
* Affection of sunlight
* Affection of excessive fresh air into
room
Is the
operation current less than
specified level?
YES
YES
Refrigerant shortage possibly
generates trouble.
Additional unit installation
should be considered.
After vacuum drying, charge
correct amount of refrigerant.
NO
Does indoor unit
airflow rate down?
YES
* Clogged air filter
* Soiled heat exchanger
* Defective indoor fan motor (Refer to
troubleshooting “A6”)
Check the each item.
* Refrigerant overcharge
* Soiled heat exchanger
* Short circuit of discharge air
* Disturbing item in airflow
* Defective fan motor of outdoor unit
(Refer to troubleshooting “E7”.)
Check the each item.
NO
Is the level
of high pressure lower than
normal level?
NO
YES
* Insufficient compression of
compressor
* Insufficient circulation of refrigerant
* Faulty electronic expansion valve
Check the each item.
∗: Refer to “Test Operation” on P.50.
94
Service Diagnosis
SiBE281013
2.8
Symptom-based Troubleshooting
Equipment Discharges White Mist
Applicable Model
All models of SkyAir series
Supposed
Causes
„
„
„
„
„
Humid installation site
Installation site is dirty and with dense oil mists.
Soiled heat exchanger
Clogged air filter
Defective fan motor
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is the room
temperature higher than set
value in cooling
operation?
YES
NO
Continue the unit operation.
Is white mist coming
out from the unit?
NO
Normal
YES
It may be necessary to remove the
source of humid condition.
Is the
heat exchanger of indoor
unit soiled?
YES
Remove the source of humid
condition.
Cleaning of heat exchanger is
necessary.
NO
Is the site dusty or
with dense oil mist?
YES
Dust or oil mists should be removed.
Remove the source of oil mist or
dust.
NO
Is the airflow
rate too small?
NO
Did the trouble generate on switching
to heating mode after complete of
defrosting during heating?
Service Diagnosis
YES
Possible causes as follows
* Clogged air filter
* Defective fan motor
Cleaning of air filter
Check the fan motor.
(Refer to troubleshooting
“A6”)
Normal
(Mist is generated due to
defrosting operation)
95
Symptom-based Troubleshooting
2.9
SiBE281013
Equipment Produces Loud Noise or Vibration
Applicable Model
All models of SkyAir series
Supposed
Causes
„
„
„
„
Defective installation
Overcharge of refrigerant
Air mixed in refrigerant system
Flushing noise due to refrigerant shortage. (Sound of shoo...)
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Does the
noise generate with vibration
of whole ceilings and
walls?
[Installation work side]
YES
Correction of installation.
Reinforcement for ceilings or
walls
NO
Does the
noise generate with
vibration of unit mounting
section?
YES
Continuous
slight noise of "shoo..." during
cooling or defrosting
NO
Is the piping secured?
NO
YES
NO
[Power supply side] YES
Sound of
"shoo..." generates just
after operation start or stop, or
defrosting start or stop.
Does the fan contact
with other parts?
YES
NO
Does the pipe
contact with casing?
NO
Is the
noise flushing sound
from pressure reducing valve or
capillary tube?
NO
NO
Sound of
"shoo..." generates during
cooling or after operation
stop.
YES
Normal. The noise is a sound
generated at the time of gas
(refrigerant) flow change or stop.
Disassemble and remove parts
contact.
YES
NO
Creak during
heating and after operation
stop
YES
YES
Insert shock absorber in
mounting section, or strengthen
the mounting section.
Normal. The sound is flushing
noise of gas (refrigerant) inside
air conditioning unit
Insert cushion materials to the
pipe support such as saddle.
Normal. Operation sound of
draining device
Correct piping manually or
attach a dead weight to pipe.
YES
NO
Normal. Creak generates by
shrinkage of resin parts due to
temperature change.
Normal.
Is this an
impact noise at the start/end
of defrosting?
YES
It is normal.
NO
* Overcharge of refrigerant
* Air mixed in refrigerant system
* Flushing noise due to refrigerant
shortage.
(Sound of shoo...)
96
After vacuum drying, charge
correct amount of refrigerant.
Service Diagnosis
SiBE281013
Symptom-based Troubleshooting
2.10 Equipment Discharges Dust
Applicable Model
All models of SkyAir series
Supposed
Causes
„ Carpet
„ Animal hair
„ Application (cloth shop,...)
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Does the
trouble generate at
the time of operation start
again after extended period
of operation?
YES
Dust collected inside the indoor
unit are blown out.
Cleaning for inside of indoor unit
is necessary.
YES
Dust collected inside the indoor
unit are blown out.
Cleaning for inside of indoor unit
is necessary.
NO
Is the air filter equipped?
NO
Install the air filter.
Service Diagnosis
97
Symptom-based Troubleshooting
SiBE281013
2.11 Remote Controller LCD Displays "88"
Applicable Model
All models of SkyAir series
Supposed
Causes
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Trouble
generates just after power
supply ON.
YES
NO
Is the
position of SS 1 on indoor
unit PCB at "Emergency"?
YES
The unit is checking to confirm
that remote controller is normal.
Indication appears for short
time.
Turn the switch to "Normal", and
reset power supply.
NO
Check the unit based on
troubleshooting of indoor unit LED and
outdoor unit LED.
98
Service Diagnosis
SiBE281013
Symptom-based Troubleshooting
2.12 Swing Flap does not Operate
Applicable
Models
All models of SkyAir series
Method of Error
Detection
Visual check
Error Decision
Conditions
When ON/OFF of the micro-switch for positioning cannot be reversed even through the swing
flap motor for a specified amount of time (about 30 seconds).
Remark
Some functions can force the swing flap into a fixed position, although swing mode is selected
on the remote controller. This is not a unit error, but a control function to prevent draft to the
customer.
Before starting the troubleshooting, make sure the swing flap is not forced into such a fixed
position. (e.g. Hot start, defrost operation, thermostat OFF in heating operation or freeze
prevention in cooling operation. For details refer to "Swing Pattern Selection" on P.30.)
Supposed
Causes
Service Diagnosis
„
„
„
„
Faulty swing motor
Faulty micro-switch
Faulty connector connection
Faulty indoor unit PCB
99
Symptom-based Troubleshooting
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Are the connectors (∗)
correctly connected?
NO
Connect correctly.
YES
Is the
limit switch’s transfer
connector correctly
connected?
NO
Connect correctly.
YES
Turn the power supply off once and
back on, and check whether the
swing flap motor swings when the
power supply is turned back on.
Does the flap swing?
YES
Disconnect X14A, turn the power
supply off once and back on, and
check if the limit switch has continuity
when the power supply it turned back
on.
NO
Turn the power supply off once and
back on, and measure the output
voltage of connector (∗) when the
power supply is turned back on.
Is continuity/no
continuity reversed?
YES
NO
220 - 240 VAC?
NO
Replace the indoor unit PCB.
YES
Replace the swing motor assembly.
Note:
*
Model
FCQG
FHQG
100
Connector for swing flap motor
X9A
PCB
A2P
X36A
A1P
Service Diagnosis
SiBE281013
Troubleshooting by LED Indications
3. Troubleshooting by LED Indications
3.1
Troubleshooting by LED on the Indoor Unit
Foreword
Troubleshooting can be carried out by service monitor LED (green). (Blinks when normal)
k : LED on / h : LED off / l : LED blinks
Micro-computer
Normal Monitor
Contents/Processing
HAP (LED-A)
Indoor unit normal → Outdoor unit troubleshooting
l
l
Incorrect transmission wiring between indoor and outdoor unit
If outdoor unit’s LED-A is OFF, proceed outdoor unit’s troubleshooting. If outdoor unit’s
LED-A blinks, defective wiring or indoor or outdoor unit PCB assy.
Defective indoor unit PCB assy
k
h
Defective power supply or defective PCB assy or broken transmission wire between indoor
and outdoor unit.
Note:
1. When the INSPECTION/TEST button of remote controller is pushed, INSPECTION display blinks entering
INSPECTION mode.
2. In the INSPECTION mode, when the ON/OFF button is pushed and held for 5 seconds or more, the
aforementioned error history display is OFF. In this case, after the error code blinks 2 times, the code
display turns to “00” (=Normal) and the unit No. turns to “0”. The INSPECTION mode automatically
switches to the normal mode (set temperature display).
3. Operation halts due to error depending on the model or condition.
4. Troubleshoot by turning OFF the power supply for a minimum of 5 seconds, turning it back ON, and then
rechecking the LED display.
3.2
Troubleshooting by LED on Outdoor Unit PCB
The following diagnosis can be conducted by turning ON the power switch and checking the LED indication
on PCB (A1P) of the outdoor unit.
k : LED on / h : LED off / l : LED blinks
LED detection
HAP
(Green)
H1P
(Red)
l
k
h
l
h
—
—
k
Description
Normal
Defective outdoor unit PCB (Note 1)
Power supply abnormality, or defective outdoor unit PCB (Note 2)
Activation of protection device (Note 3)
Note:
1. Turn OFF the power supply, and turn it ON again after 5 seconds or more. Check the error condition, and
diagnose the problem.
2. Turn OFF the power supply. After 5 seconds or more, disconnect the connection wire (2). Then turn ON
the power supply. If the HAP on the outdoor unit PCB flashes after about 10 seconds, the indoor unit PCB
is faulty.
3. Also check for open phase.
Remark:
The error detection monitor continues to indication the previously generated error until the power supply is
turned OFF.
Be sure to turn OFF the power supply after inspection.
Service Diagnosis
101
Troubleshooting by Remote Controller
SiBE281013
4. Troubleshooting by Remote Controller
4.1
Procedure of Self-diagnosis by Remote Controller
4.1.1 Wired Remote Controller — BRC1D528
If operation stops due to error, the remote controller’s operation LED blinks, and error code is displayed.
(Even if stop operation is carried out, error contents are displayed when the inspection mode is entered.) The
error code enables you to tell what kind of error caused operation to stop. Refer to P.106 for error code and
error contents.
Operation LED
ON/OFF button
Display of indoor unit for
which an error has been
detected
Inspection display
Error code
Inspection/Test button
Note:
1. Pressing the INSPECTION/TEST button will blink the check indication.
2. While in service mode, holding down the ON/OFF button for a period of 5 seconds or more will clear the
failure history indication shown above. In this case, on the codes display, the error code will blink twice and
then change to “00” (=Normal), the Unit No. will change to “0”, and the operation mode will automatically
switch from service mode to normal mode (displaying the set temperature).
102
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.1.2 Wired Remote Controller — BRC1E51A7
The following will be displayed on the screen when a malfunction (or a warning) occurs during operation.
Check the malfunction code and take the corrective action specified for the particular model.
Screen
Operation lamp
(1) Checking a malfunction or warning
Operation Status
Display
The operation lamp (green)
starts to blink. The message
"Error: Press Menu button" will
appear and blink at the bottom of
the screen.
Abnormal
shutdown
The system stops operating.
Warning
The operation lamp (green)
remains on. The message
The system continues its operation. "Warning: Press Menu button"
will appear and blink at the
bottom of the screen.
(2) Taking corrective action
· Press the Menu/Enter button to check the error code.
· Take the corrective action specific to the model.
Error code
Applicable model
names
Service Diagnosis
103
Troubleshooting by Remote Controller
SiBE281013
4.1.3 Wireless Remote Controller
If unit stops due to an error, the operation indicating LED on the signal receiving part of indoor unit flashes.
The error code can be determined by following the procedure described below. (The error code is displayed
when an operation error has occurred. In normal condition, the error code of the last problem is displayed.)
1
2
3
4
Press the INSPECTION/TEST button to select “inspection”. The equipment enters
the inspection mode. The “Unit” indication is displayed and the Unit No. display
shows flashing “0” indication.
Set the Unit No.
Press the UP or DOWN button and change the Unit No. display until the buzzer
(∗1) is generated from the indoor unit.
∗1 Number of beeps
3 short beeps : Conduct all of the following operations.
1 short beep : Conduct steps 3 and 4.
Continue the operation in step 4 until a buzzer remains ON. The
continuous buzzer indicates that the error code is confirmed.
Continuous beep : No abnormality.
Press the MODE selector button.
The left “0” (upper digit) indication of the error code flashes.
Error code upper digit diagnosis
Press the UP or DOWN button and change the error code upper digit until the error
code matching buzzer (∗2) is generated.
„ The upper digit of the code changes as shown below when the UP and DOWN
buttons are pressed.
"UP" button
5
6
∗2 Number of beeps
Continuous beep : Both upper and lower digits matched. (Error code confirmed)
2 short beeps : Upper digit matched.
1 short beep : Lower digit matched.
Press the MODE selector button.
The right “0” (lower digit) indication of the error code flashes.
Error code lower digit diagnosis
Press the UP or DOWN button and change the error code lower digit until the
continuous error code matching buzzer (∗2) is generated.
„ The lower digit of the code changes as shown below when the UP and DOWN
buttons are pressed.
"UP" button
104
"DOWN" button
"DOWN" button
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
Normal status
Enters inspection mode from normal status
when the INSPECTION/ TEST button is
pressed.
1 Press INSPECTION/TEST button.
If no button is pressed for 1
minute, equipment returns to
normal status.
3 Press
MODE
selector
button.
When MODE selector
button is pressed or no
button is pressed for 1
minute, equipment returns
to normal status.
If no button is pressed for 1
minute, equipment returns to
normal status.
5 Press MODE selector button.
Service Diagnosis
105
Troubleshooting by Remote Controller
4.2
Error Codes and Description
Remote
Controller
Display
Indoor Unit
Outdoor
Unit
System
106
SiBE281013
Contents of Error
Reference Page
A1
A3
A6
AJ
C1
C4
C5
C9
CC
CJ
E1
E3
E4
E5
E7
E9
F3
H3
H9
J3
J5
J6
J7
J8
L1
L4
L5
L8
L9
LC
P1
PJ
U0
U2
U4
U5
U8
UA
UC
UE
Indoor unit PCB abnormality
108
Drain water level system abnormality
109
Indoor unit fan motor abnormality
111
Capacity setting abnormality
112
Transmission Error (between indoor unit PCB and adaptor PCB)
113
Heat exchanger thermistor system abnormality
115
Intermediate heat exchanger thermistor system abnormality
115
Suction air thermistor system abnormality
115
Humidity sensor system abnormality
116
Remote controller thermistor abnormality
117
Outdoor unit PCB abnormality
118
High pressure abnormality (detected by the high pressure switch)
119
Actuation of pressure sensor
123
Compressor motor lock
125
Outdoor unit fan motor abnormality
126
Electronic expansion valve abnormality
128
UF
Discharge pipe temperature control
131
High pressure switch system abnormality
133
Outdoor air thermistor system abnormality
134
Discharge pipe thermistor system abnormality
134
Suction pipe thermistor system abnormality
134
Heat exchanger thermistor system abnormality
134
Intermediate heat exchanger thermistor system abnormality
134
Liquid pipe thermistor system abnormality
134
Outdoor unit PCB abnormality
135
Radiation fin temperature rise
137
Output overcurrent detection
139
Electronic thermal (time lag)
141
Stall prevention (time lag)
143
Transmission system abnormality (between control and inverter PCB)
145
Open phase or power supply voltage imbalance
146
Defective capacity setting
147
Refrigerant shortage
148
Power supply voltage abnormality
151
Transmission error between indoor and outdoor unit
153
Transmission error between remote controller and indoor unit
156
Transmission error between MAIN remote controller and SUB remote controller
157
Field setting switch abnormality
158
Address duplication of centralized controller
160
Transmission error between centralized controller and indoor unit
161
Transmission error between indoor and outdoor unit / piping and wiring
mismatch / refrigerant shortage
163
Service Diagnosis
SiBE281013
4.3
Troubleshooting by Remote Controller
Safety Devices
4.3.1 Outdoor Unit
High pressure switch
Model
RZQG71L
Fuse
Open
Close
4.0 MPa +0/– 0.15
3.0 MPa ± 0.15
6.3A/250V (F1U), 3.15A/250V (F6U)
RZQG100L
6.3A/250V (F1U, F2U, F3U),
RZQG125L
5A/250V (F6U)
RZQG160L
4.3.2 Indoor Unit
Thermal protector
Model
Fuse
Abnormal
Reset (automatic)
FCQG
N.A.
—
FHQG
Service Diagnosis
—
3.15A/250V (F1U)
107
Troubleshooting by Remote Controller
4.4
SiBE281013
Indoor Unit PCB Abnormality
A1
Remote
Controller
Display
Applicable
Models
All models of indoor unit
Method of Error
Detection
Check data from E2PROM.
Error Decision
Conditions
The error is generated when the data from the E2PROM is not received correctly.
E2PROM (Electrically Erasable Programmable Read Only Memory): A memory chip that holds
its content without power. It can be erased, either within the computer or externally and usually
requires more voltage for erasure than the common +5 volts used in logic circuits. It functions
like non-volatile RAM, but writing to E2PROM is slower than writing to RAM.
„ Defective indoor unit PCB
„ External factor (Noise, etc.)
Supposed
Causes
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Turn OFF the power supply and turn
the power ON again.
Is it normal?
NO
Replace the indoor unit PCB.
YES
The error may be caused by an
external factor, rather than
damaged parts.
Locate the cause and correct
the situation.
108
Service Diagnosis
SiBE281013
4.5
Troubleshooting by Remote Controller
Drain Water Level System Abnormality
Remote
Controller
Display
A3
Applicable
Models
All models of indoor unit
Method of Error
Detection
By float switch OFF detection
Error Decision
Conditions
The error is generated when the water level reaches its upper limit and when the float switch
turns OFF.
Supposed
Causes
„
„
„
„
„
„
Service Diagnosis
Defective drain pump
Improper drain piping work
Drain piping clogging
Defective float switch
Defective indoor unit PCB
Defective short circuit connector X15A on PCB
109
Troubleshooting by Remote Controller
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is the unit a cassette type?
YES
NO
YES
Is the optional
drain pump kit installed?
NO
Is the short
circuit connector connected
to X15A on the indoor
unit PCB?
NO
Connect the short circuit
connector.
YES
Check the
continuity of the short circuit
connector. Is there
continuity?
NO
Replace the short circuit
connector.
YES
Replace the indoor unit PCB.
Is a drain
pump connected to the indoor
unit PCB?
NO
Connect the drain pump.
YES
Does the
drain pump work after restarting
operation?
NO
Set to "emergency"
and check the voltage of X25A.
220-240 VAC?
NO
Replace the indoor unit PCB.
YES
YES
Replace the drain pump.
Is the drain water level
abnormally high?
YES
Defective drain system
NO
Is the float switch
connected to X15A?
NO
Connect the float switch.
YES
Remove the float switch from X15A,
short circuit X15A, and restart
operation.
Error is displayed again?
NO
Replace the float switch.
YES
Replace the indoor unit PCB.
Note:
If "A3" is detected by a PCB without X15A, the PCB is defective.
110
Service Diagnosis
SiBE281013
4.6
Troubleshooting by Remote Controller
Indoor Unit Fan Motor Abnormality
A6
Remote
Controller
Display
Applicable
Models
All models of indoor unit
Method of Error
Detection
Detection of abnormal rotation speed of fan motor by signal from the fan motor
Error Decision
Conditions
The error is generated when the rotation speed of the fan motor are not detected while the
output voltage to the fan is at its maximum.
Supposed
Causes
„
„
„
„
Defective indoor unit fan motor
Breaking or disconnection of wire
Defective contact
Defective indoor unit PCB
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Turn OFF the power supply.
Wait for 10min.
Is there any
foreign matter around
the fan?
NO
YES
Is the
fan motor harness
connected to indoor unit
PCB (∗)?
Remove the foreign matter.
NO
Connect correctly.
YES
With
connector for fan
motor (∗) disconnected, can
the fan be easily turned
by hands?
NO
Replace the fan motor.
YES
CHECK 6
Check for the fan motor connector.
Is
the resistance
between each pins above
judgement
standard?
NO
Replace the fan motor.
YES
Replace the indoor unit PCB.
Note:
∗ Connector and indoor unit PCB
Model
Connector for fan motor
PCB
FCQG
FHQG
X20A
X20A
A1P
A1P
CHECK 6 Refer to P.172.
Service Diagnosis
111
Troubleshooting by Remote Controller
4.7
SiBE281013
Capacity Setting Abnormality
AJ
Remote
Controller
Display
Applicable
Models
All models of indoor unit
Method of Error
Detection
Capacity is determined according to resistance of the capacity setting adaptor and the memory
inside the IC memory on the indoor unit PCB, and whether the value is normal or abnormal is
determined.
Error Decision
Conditions
The error is generated when the following conditions are fulfilled:
Condition
Description
z The unit is in operation.
z The PCB’s memory IC does not contain the capacity code.
z The capacity setting adaptor is not connected.
z The unit is in operation.
z The capacity that is set, does not exist for that unit.
1
2
Supposed
Causes
„ Defective capacity setting adaptor connection
„ Defective indoor unit PCB
Capacity setting
adaptor
The capacity is set in the PCB’s memory IC. A capacity setting adaptor that matches the
capacity of the unit is required in the following case:
In case the indoor PCB installed at the factory is for some reason changed at the installation
site, the capacity will not be contained in the replacement PCB. To set the correct capacity for
the PCB you have to connect a capacity setting adaptor with the correct capacity setting to the
PCB. The capacity setting for the PCB will become the capacity setting of the adaptor because
the capacity setting adaptor has priority.
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
The indoor
unit PCB was replaced
with a spare PCB.
NO
Replace the indoor unit PCB.
YES
Was the
capacity setting
adaptor mounted when
replacing the
PCB?
YES
Replace the indoor unit PCB.
NO
Install a capacity setting
adaptor.
112
Service Diagnosis
SiBE281013
4.8
Troubleshooting by Remote Controller
Transmission Error (between Indoor Unit PCB and
Adaptor PCB)
Remote
Controller
Display
C1
Applicable
Models
FCQG
Method of Error
Detection
Check the condition of transmission between indoor unit PCB (A1P) and adaptor PCB (A2P)
using micro-computer.
Error Decision
Conditions
When normal transmission is not conducted for certain duration (15 seconds or more). After 60
seconds, error is display on the remote controller.
Supposed
Causes
„
„
„
„
Service Diagnosis
Connection defect of the connector indoor unit PCB (A1P) and adaptor PCB (A2P)
Defective indoor unit PCB (A1P)
Defective adaptor PCB (A2P)
External factor (Noise, etc.)
113
Troubleshooting by Remote Controller
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is the connection of
connector X70A on indoor unit
PCB (A1P) normal?
NO
Connect the connector
accurately.
YES
Is the connection of
connector X7A on adaptor PCB
(A2P) normal?
NO
Connect the connector
accurately.
YES
Is the connector X8A on
adaptor PCB (A2P) not short
circuited?
YES
Short circuit X8A.
NO
Is the harness disconnected?
YES
Replace the harness.
NO
Is there an external factor
(noise, etc.) except for a fault?
YES
Eliminate the external factor.
NO
Turn OFF the power supply and turn
the power ON.
↓
Press the power switch on the remote
controller.
Error is displayed again?
YES
114
NO
Normal operation.
Check the panel PCB and
indoor unit PCB.
Service Diagnosis
SiBE281013
4.9
Troubleshooting by Remote Controller
Thermistor Abnormality
C4, C5, C9
Remote
Controller
Display
Applicable
Models
All models of indoor unit
Method of Error
Detection
The error is detected by temperature detected by thermistor.
Error Decision
Conditions
When the thermistor becomes disconnected or shorted while the unit is running.
Supposed
Causes
„
„
„
„
Defective connector connection
Defective thermistor
Defective indoor unit PCB
Broken or disconnected wire
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Check the connector connection.
Is it connected properly?
NO
Correct the connection.
YES
Check the thermistor resistance.
CHECK 1
Is it normal?
NO
Replace the thermistor.
YES
Replace the outdoor unit PCB.
Error Code
C4
C5
C9
Defective Thermistor
Symbol
Heat exchanger thermistor
R2T
Intermediate heat exchanger thermistor
R3T
Suction air thermistor
R1T
CHECK 1 Refer to P.165.
Service Diagnosis
115
Troubleshooting by Remote Controller
SiBE281013
4.10 Humidity Sensor System Abnormality
CC
Remote
Controller
Display
Applicable
Models
FCQG
Method of Error
Detection
Even if error occurs, operation still continue.
The error is detected by humidity (output voltage) detected by humidity sensor.
Error Decision
Conditions
The error is generated when the humidity sensor becomes disconnected or shorted when the
unit is running.
Supposed
Causes
„ Defective sensor
„ Broken wire
„ External factor (Noise, etc.)
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Remove the humidity sensor from the
indoor PCB and insert it again.
Does it
function normally?
YES
It is normal.
(Poor connector contact)
NO
Delete the error code record from the
remote controller. (∗1)
Error is displayed
again? (∗2)
NO
YES
Replace the humidity
sensor PCB assy (A3P).
∗3
External factor (Noise,
etc.)
Note:
∗1 To delete the record, the ON/OFF button of the remote controller must be pushed and held for 5 seconds
in the check mode.
∗2 To display the code, the Inspection/Test Operation button of the remote controller must be pushed and
held in the normal mode.
∗3 If "CC" is displayed even after replacing the humidity sensor PCB assy (A3P) and taking the steps ∗1 and 2,
replace the indoor PCB assy (A1P).
116
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.11 Remote Controller Thermistor Abnormality
CJ
Remote
Controller
Display
Applicable
Models
All models of indoor unit
Method of Error
Detection
Even if remote controller thermistor is faulty, system is possible to operate by indoor unit suction
air thermistor.
The error is detected by temperature of remote controller thermistor.
Error Decision
Conditions
The error is generated when the remote controller thermistor becomes disconnected or shorted
when the unit is running.
Even if the remote controller thermistor is error, the system can operate with the system
thermistor.
„ Defective thermistor
„ Broken wire
„ External factor (Noise, etc.)
Supposed
Causes
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Delete the error code record from the
remote controller. (∗1)
Error is displayed again?
YES
Replace the remote controller.
NO
External factor (Noise, etc.)
Note:
∗1: To delete the record, the ON/OFF button of the remote controller must be pressed for 5 seconds in the
check mode.
Service Diagnosis
117
Troubleshooting by Remote Controller
SiBE281013
4.12 Outdoor Unit PCB Abnormality
E1
Remote
Controller
Display
Applicable
Models
RZQG
Method of Error
Detection
Micro-computer checks whether E2PROM is normal.
Error Decision
Conditions
When E2PROM error when turning the power supply ON
Supposed
Causes
„ Defective outdoor unit PCB (A1P)
„ Defective fan motor
„ External factor (Noise, etc.)
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Turn OFF the power supply and turn
the power ON.
Is normal
reset possible?
YES
External factor (Noise, etc.)
NO
Turn OFF the power supply, remove
the fan motor connector and then turn
the power ON again.
Error is displayed again?
YES
Replace the outdoor unit PCB
(A1P).
NO
Check the fan motor.
118
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.13 High Pressure Abnormality (Detected by the High
Pressure Switch)
4.13.1 RZQG71, 100
E3
Remote
Controller
Display
RZQG71, 100
Applicable
Models
Method of Error
Detection
[In cooling]
„ The error is detected by the outdoor unit intermediate heat exchanger thermistor (R5T).
[In heating]
„ The error is detected by the indoor unit intermediate heat exchanger thermistor (R3T).
Error Decision
Conditions
[In cooling]
„ When the outdoor unit intermediate thermistor (R5T) detects the pressure shown below.
3.92 MPa or more continuously for one minute
(Reference: equivalent saturation temperature 62°C)
[In heating]
„ When the indoor unit intermediate thermistor (R3T) detects the pressure shown below.
3.92 MPa or more continuously for one minute
(Reference: equivalent saturation temperature 62°C)
„
„
„
„
„
„
„
Supposed
Causes
Dirt and blockage of the outdoor unit heat exchanger
Defective outdoor unit fan motor
Defective indoor unit fan motor
Defective electronic expansion valve
Overcharge of refrigerant
Defective indoor unit PCB
Defective outdoor inverter unit PCB
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
[In cooling]
Are the
characteristics of the
outdoor unit intermediate
thermistor normal?
NO
YES
The
outdoor unit heat
exchanger is clogged or
blocked.
YES
NO
The
outdoor unit fan is
rotating during operation.
NO
Replace the outdoor unit
intermediate heat exchanger
thermistor.
Clean or remove the clocking
item.
Remove the foreign matter.
Replace the fan motor.
YES
A
Service Diagnosis
119
Troubleshooting by Remote Controller
SiBE281013
A
Are
the operation
of electronic expansion
valve normal?
NO
Troubleshooting "E9"
YES
CHECK 2
High pressure is too
high.
YES
NO
CHECK 9
Replace the outdoor unit PCB
(A2P)
If error is displayed again,
replace the inverter PCB (A1P).
[In heating]
Are the
characteristics of the
indoor unit intermediate
thermistor normal?
NO
Replace the indoor unit
intermediate heat exchanger
thermistor.
YES
The indoor
unit fan is rotating during
operation.
NO
YES
Are
the operation
of electronic expansion
valve normal?
NO
Remove the foreign matter.
Replace the fan motor.
Troubleshooting "E9"
YES
CHECK 2
High pressure is too
high.
NO
YES
CHECK 9
Replace the outdoor unit PCB
(A2P)
If error is displayed again,
replace the inverter PCB (A1P).
CHECK 2 Refer to P.168.
CHECK 9 Refer to P.174.
120
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.13.2 RZQG125, 140
Remote
Controller
Display
Applicable
Models
Method of Error
Detection
E3
RZQG125, 140
[In cooling]
„ Detect the continuity of high pressure switch (S1PH) with the protection device circuit.
„ The error is detected by the outdoor unit intermediate heat exchanger thermistor (R5T).
[In heating]
„ Detect the continuity of high pressure switch (S1PH) with the protection device circuit.
„ The error is detected by the indoor unit intermediate heat exchanger thermistor (R3T).
Error Decision
Conditions
„ When the high pressure switch is activated (4.0 MPa)
„ When the outdoor unit intermediate thermistor (R5T) detects the pressure shown below.
3.92 MPa or more continuously for one minute
(Reference: equivalent saturation temperature 62°C)
„ When the indoor unit intermediate thermistor (R3T) detects the pressure shown below.
3.92 MPa or more continuously for one minute
(Reference: equivalent saturation temperature 62°C)
Supposed
Causes
Service Diagnosis
„
„
„
„
„
„
„
„
„
„
„
Stop valve is not opened
Harness breaking or poor connector connection of the high pressure switch
Defective high pressure switch
Indoor unit suction filter is blocked (In heating)
Defective high pressure switch
Defective indoor unit fan (In heating)
Outdoor heat exchanger is dirt (In cooling)
Defective outdoor unit fan (In cooling)
Overcharge of refrigerant
Defective outdoor unit PCB (A2P)
Defective outdoor unit PCB (A1P)
121
Troubleshooting by Remote Controller
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
NO
Is the stop valve open?
Open the stop valve.
YES
Are the
connection of the
connector on PCB and the
connection to the switch
unit normal?
NO
Correctly connect.
YES
After turning OFF the power and
stopping the compressor for 10
minutes, check the items below.
NO
Is there continuity in the
high pressure switch?
Replace the high pressure
switch with no continuity.
YES
Is there continuity in the
high pressure switch
connecting line?
NO
Replace the connecting line.
YES
[In cooling]
[In heating]
Are the characteristics
of the outdoor unit
intermediate thermistor
normal?
NO
Are the
characteristics of the
indoor unit intermediate
thermistor normal?
YES
Replace the outdoor unit
intermediate heat exchanger
thermistor.
NO
Replace the indoor unit
intermediate heat exchanger
thermistor.
YES
Turn the power ON and restart.
"H3" is displayed?
YES
Replace the high pressure
switch.
NO
CHECK 2
High pressure is too high.
YES
CHECK 9
NO
Replace the outdoor unit PCB
(A2P).
If error is displayed again,
replace the inverter PCB (A1P).
CHECK 2 Refer to P.168.
CHECK 9 Refer to P.174.
122
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.14 Actuation of Pressure Sensor
Remote
Controller
Display
Applicable
Models
Method of Error
Detection
E4
RZQG
[In cooling]
„ Detect error by the indoor unit intermediate thermistor (R3T).
[In heating]
„ Detect error by the intermediate heat exchanger thermistor (R5T).
Error Decision
Conditions
[In cooling]
„ When the detection pressure is the following value
0.12MPa or less continues for 5 minutes
„ When the saturated pressure equivalent temperature is –34°C
Supposed
Causes
Service Diagnosis
„
„
„
„
„
„
The stop valve is not opened
Disconnection of outdoor unit intermediate thermistor
Disconnection of indoor unit intermediate thermistor
Defective thermistor
Defective outdoor unit PCB (A1P)
Abnormal drop of low pressure
123
Troubleshooting by Remote Controller
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
NO
Is the stop valve open?
Open the stop valve.
YES
NO
(In heating
operation)
Is it in cooling operation?
YES
(In cooling
operation)
Is the indoor
unit intermediate thermistor
properly connected to the
indoor unit PCB?
Is
the heat
exchanger intermediate
thermistor (connector : X12A)
properly connected to the
outdoor unit PCB?
Connect the connector properly.
YES
NO
Connect the connector properly.
CHECK 1
Remove the thermistor from the
outdoor unit PCB and measure the
resistance.
YES
CHECK 1
Remove the thermistor from the indoor
unit PCB and measure the resistance.
Is it normal?
NO
Replace the group thermistor.
YES
NO
Is it normal?
NO
Replace the indoor unit intermediate
thermistor.
YES
Is low pressure
abnormally low?
CHECK 3
NO
Replace the outdoor unit PCB (A1P).
YES
Correct the refrigerant system defect.
CHECK 1 Refer to P.165.
CHECK 3 Refer to P.169.
124
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.15 Compressor Motor Lock
E5
Remote
Controller
Display
Applicable
Models
RZQG
Method of Error
Detection
Detect the motor lock when the compressor is energized.
Error Decision
Conditions
If the motor rotor does not rotate when the compressor is energized.
Supposed
Causes
„ Compressor lock
„ High differential pressure (2.6 MPa or more) starting
„ Stop valve is not opened
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Check the installation conditions.
Is the stop valve open?
NO
Open the stop valve.
YES
Is the UVWN
wiring normal?
NO
Connect correctly.
YES
Check and see
whether compressor is
short-circuited
or ground.
YES
Replace the compressor.
NO
Is high
differential pressure
starting? (2.6 MPa or
more)
YES
Remedy the cause.
NO
Replace the compressor.
Service Diagnosis
125
Troubleshooting by Remote Controller
SiBE281013
4.16 Outdoor Unit Fan Motor Abnormality
E7
Remote
Controller
Display
Applicable
Models
RZQG
Method of Error
Detection
Abnormality of fan motor system is detected according to the fan speed detected by hall IC
when the fan motor runs.
Error Decision
Conditions
„ When the fan runs with speed less than a specified one for 15 seconds or more when the fan
motor running conditions are met
„ When connector detecting fan speed is disconnected
„ When the error is generated 4 times, the system shuts down.
„ Defective fan motor
„ The harness connector between fan motor and PCB is left in disconnected, or faulty
Supposed
Causes
„
„
„
„
connector
Fan does not run due to foreign matters tangled
Defective the outdoor PCB
Blowout of fuse
External factor (Noise, etc.)
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is the supply
voltage within the range 180
to 220 VAC ?
YES
NO
Ask repair so that the supply
voltage will be within the normal
range.
Turn OFF the power supply (and wait
for 10 minutes).
Remove the connector for fan motor
once, and then connect it again.
A
126
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
A
Is there any
foreign matter around
the fan?
YES
Remove the foreign matter.
NO
Remove the fan motor connector.
Is the fan
rotatable easily by hand?
NO
Replace the fan motor.
YES
CHECK 6
Check the resistance value for the fan
motor.
Is the
resistance value of the fan motor
normal?
NO
Replace the fan motor.
YES
Does the fuse (F6U)
have continuity?
NO
Replace the fuse.
YES
Properly plug the fan motor connector
and then turn the power ON again.
Error is displayed?
NO
YES
Replace the outdoor unit
inverter PCB.
External factor (Noise, etc.)
CHECK 6 Refer to P.172.
Service Diagnosis
127
Troubleshooting by Remote Controller
SiBE281013
4.17 Electronic Expansion Valve Abnormality
Remote
Controller
Display
E9
Applicable
Models
RZQG
Method of Error
Detection
„ The error is detected whether the continuity of electronic expansion valve exist or not.
„ The error is detected by the suction pipe superheat degree, discharge pipe superheat
degree and electronic expansion valve opening degree.
Error Decision
Conditions
„ No common power supply when the power is ON.
„ When the following conditions are met
• Suction pipe superheat degree < 4°C
• Minimum electronic expansion valve opening degree
• Discharge pipe superheat degree < 5°C
Supposed
Causes
„
„
„
„
„
„
„
128
Defective electronic expansion valve
Disconnection of electronic expansion valve harness
Defective connection of electronic expansion valve connector
Defective each thermistor and mounting thermistor
Defective pressure sensor
Defective outdoor unit PCB
Abnormal wet operation
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Turn OFF the power supply and turn
the power ON again.
NO
Error is displayed again?
YES
Is the
electronic expansion
valve connector properly
connected to the outdoor
unit PCB?
(∗1)
NO
Connect properly.
YES
Is the coil
resistance of the electronic
expansion valve normal?
CHECK 7
NO
Replace the coil of the
electronic expansion valve.
YES
Is the
temperature
sensor of each thermistor
(suction pipe, discharge pipe,
intermediate heat exchanger and
heat exchanger distributor
pipe thermistors)
mounted
properly?
NO
Mount properly.
YES
A
Note:
∗1 Connector and indoor unit PCB
Model
Connector for electronic expansion valve
PCB
RZQG
X21A
A1P
CHECK 7 Refer to P.172.
Service Diagnosis
129
Troubleshooting by Remote Controller
SiBE281013
A
Are
the characteristics
of each thermistor normal?
CHECK 1
NO
Replace the defective
thermistor.
YES
Are
the pressure sensor
characteristics normal?
CHECK 5
NO
Replace the pressure sensor.
YES
Actually, it is in wet operation.
Refer to CHECK 8 to eliminate the
causes of wet operation.
Restart operation.
Error is displayed again?
YES
Replace the outdoor unit PCB
(A1P).
NO
External factor (Noise, etc.)
CHECK 1 Refer to P.165.
CHECK 5 Refer to P.171.
CHECK 8 Refer to P.173.
130
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.18 Discharge Pipe Temperature Control
Remote
Controller
Display
F3
Applicable
Models
RZQG
Method of Error
Detection
The error is detected according to the temperature detected by the discharge pipe temperature
sensor.
Error Decision
Conditions
„ When the discharge pipe temperature rises to an abnormally high level
„ When the discharge pipe temperature rises suddenly
„ When the discharge pipe temperature does not rise after operation start
Supposed
Causes
„
„
„
„
„
„
Service Diagnosis
Defective discharge pipe thermistor
Defective connection of discharge pipe thermistor
Refrigerant shortage
Defective compressor
Disconnection of discharge pipe thermistor
Defective outdoor unit PCB
131
Troubleshooting by Remote Controller
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is the
discharge pipe temperature
above the criteria?
( ∗1)
YES
Abnormality in refrigerant
system such as refrigerant
shortage, faulty compressor,
etc. Conduct inspection
NO
Is
the discharge pipe
thermistor correctly connected
to outdoor unit PCB
(A1P)?
NO
Connect correctly.
YES
Is the discharge
pipe thermistor attached to the
discharge pipe?
NO
Attach the thermistor.
YES
CHECK 1
Is the discharge pipe
thermistor characteristic
normal?
NO
Replace the discharge pipe
thermistor.
YES
Replace the outdoor unit PCB
(A1P).
Note:
∗1 Temperature varies depending on model type.
Model
Temperature
RZQG71
RZQG100-140
110 °C
115 °C
CHECK 1 Refer to P.165.
132
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.19 High Pressure Switch System Abnormality
H3
Remote
Controller
Display
Applicable
Models
RZQG125, 140
Method of Error
Detection
The protection device circuit checks continuity in the high pressure switch (S1PH).
Error Decision
Conditions
When there is no continuity in the high pressure switch during compressor stops operating.
Supposed
Causes
„
„
„
„
Incomplete high pressure switch
Defective connection of high pressure switch connector
Defective outdoor unit PCB
Disconnected lead wire
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is protection
high pressure switch connector
(∗1) correctly connected to
outdoor unit PCB?
NO
Connect correctly.
YES
Wait for 10 minutes after the unit
stops operating, then check the
following.
Is there continuity
in each protection high
pressure switch?
NO
Replace the high pressure
switch with no continuity.
Resistance in normal operation :
10Ω or less
YES
Is there continuity
in lead wire?
NO
Replace the lead wire.
YES
Replace the outdoor unit PCB
(A1P).
Note:
∗1 Connector and indoor unit PCB
Model
Connector for high pressure switch
PCB
RZQG
X32A
A1P
Service Diagnosis
133
Troubleshooting by Remote Controller
SiBE281013
4.20 Thermistor System Abnormality
H9, J3, J5, J6, J7, J8
Remote
Controller
Display
Applicable
Models
RZQG
Method of Error
Detection
The error is detected according to the temperature detected by each individual thermistor.
Error Decision
Conditions
When thermistor is disconnected or short circuited during operation
Supposed
Causes
„ Defective thermistor
„ Defective connection of connector
„ Defective outdoor unit PCB (A1P)
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Check connectors for connection.
Is it normal?
NO
Connect correctly.
YES
Remove thermistor from outdoor unit
PCB, then measure the resistance
using a tester.
CHECK 1
Is it normal?
NO
Replace the thermistor.
YES
Replace the outdoor unit PCB
(A1P).
Error Code
H9
J3
J5
J6
J7
J8
Defective Thermistor
Symbol
Outdoor air thermistor
R1T
Discharge pipe thermistor
R2T
Suction pipe thermistor
R3T
Heat exchanger thermistor
R4T
Intermediate heat exchanger thermistor
R5T
Liquid pipe thermistor
R6T
CHECK 1 Refer to P.165.
134
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.21 Outdoor Unit PCB Abnormality
Remote
Controller
Display
L1
Applicable
Models
RZQG
Method of Error
Detection
„ Detect error by current value during waveform output before compressor startup.
„ Detect error by current sensor value during synchronized operation at the time of startup.
„ Detect error using an MP-PAM series capacitor overvoltage sensor.
Error Decision
Conditions
„ When over-current is detected at the time of waveform output during operating the
„
„
„
„
Supposed
Causes
Service Diagnosis
„
„
„
„
„
compressor
When the current sensor error during synchronized operation
When overvoltage occurs in MP-PAM
In case of IGBT error
In case of faulty in E2PROM
External factor (Noise, etc.)
Defective outdoor unit fan motor
Broken fuse
Disconnection of compressor
Defective outdoor unit PCB (A1P)
• IPM failure
• Current sensor failure
• MP-PAM failure
• Defective IGBT or drive circuit
• Defective inverter E2PROM
135
Troubleshooting by Remote Controller
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is the power supply
voltage between 180
and 220 VAC?
NO
YES
Request an improvement to
make the power supply voltage
fall within the standard range.
Turn OFF the power supply, and
remove the connector for fan motor,
and then operate again.
"L1" is displayed?
NO
Replace the fan motor.
YES
CHECK 6
Check the resistance value for the fan
motor.
Is the resistance value of
the fan motor normal?
NO
Replace the fan motor.
YES
Does the fuse
have continuity?
NO
Replace the fuse. Use only
specified fuses.
YES
Is
the lead wire
connected to the PCB and the
compressor
securely?
NO
Connect securely.
YES
Turn the power ON again.
Error is displayed again?
YES
Replace the outdoor unit PCB
(A2P).
NO
External factor (Noise, etc.)
CHECK 6 Refer to P.172.
136
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.22 Radiation Fin Temperature Rise
Remote
Controller
Display
L4
Applicable
Models
RZQG
Method of Error
Detection
Radiation fin temperature is detected by the radiation fin thermistor.
Error Decision
Conditions
When the temperature of the inverter radiation fin rises abnormally due to faulty heat
dissipation.
Supposed
Causes
„
„
„
„
„
„
„
„
„
Service Diagnosis
Actuation of fin thermal switch
Insufficient cooling of inverter radiation fin
High outdoor air temperature
Blocked suction inlet
Blocked discharge outlet
Dirty radiation fin
Disconnection of connector
Defective radiation fin thermistor
Defective outdoor unit inverter PCB
137
Troubleshooting by Remote Controller
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Can it be considered
that the radiation fin temperature
was high? (∗1)
YES
Eliminate the cause.
NO
Is the connector
of the radiation fin thermistor
correctly connected to the
outdoor unit PCB?
(∗1)
NO
Connect correctly.
YES
Turn the power ON, and then press
the remote controller check button
once.
"P4" is displayed?
YES
Troubleshooting "P4".
NO
Error is displayed again?
YES
Replace the outdoor unit
inverter PCB.
NO
Continue the operation.
Note:
∗1 Radiation fin temperature detection value
Model
RZQG71
RZQG100-140
138
Detection
Reset
85°C
89°C
75°C
79°C
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.23 Output Overcurrent Detection
L5
Remote
Controller
Display
Applicable
Models
RZQG
Method of Error
Detection
The error is detected by converting the current flowing to power transistor into voltage with CT1
(DC current sensor).
Error Decision
Conditions
When overcurrent has run to power transistor.
(Actuated even by instantaneous overcurrent)
Supposed
Causes
„
„
„
„
„
Defective compressor (mechanical lock, poor insulation)
Defective inverter PCB
Instantaneous fluctuation of power supply voltage
Defective compressor (if bearing is scratched)
Stop valve is not opened.
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Check the installation conditions.
Is the stop valve open?
NO
Open the stop valve.
YES
The compressor is
grounded and short
circuited.
YES
Replace the compressor.
NO
A
Service Diagnosis
139
Troubleshooting by Remote Controller
SiBE281013
A
CHECK 4
Continuity check in the power
transistor (IGBT). Is the
continuity normal?
NO
Replace the outdoor unit PCB.
YES
Turn the power ON, and then operate
the test operation.
Error is displayed again?
NO
YES
Continue the
operation normally.
YES
NO
Go to the other troubleshooting.
Normal operation.
Check the power supply voltage.
Is instantaneous
voltage drop generated?
YES
Correct the power supply.
NO
Compressor inspection.
Inspect according to the
diagnosis procedure for
abnormal noise, vibration,
operating status, etc. of the
compressor.
CHECK 4 Refer to P.170.
140
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.24 Electronic Thermal (Time Lag)
Remote
Controller
Display
L8
Applicable
Models
RZQG
Method of Error
Detection
The error is detected from the current flowing to power transistor into voltage with CT1 (DC
current sensor).
Error Decision
Conditions
When compressor overload (except for when startup) is detected.
Supposed
Causes
„
„
„
„
„
Service Diagnosis
Disconnected compressor coil
High pressure is abnormal high
Defective compressor (if bearing is scratched)
Defective outdoor unit PCB
Stop valve is not opened
141
Troubleshooting by Remote Controller
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is the secondary
current of the inverter higher
than A (∗1) for
each phase?
YES
Is the stop valve opened?
NO
NO
Open the stop valve.
YES
CHECK 2
High pressure is high.
Turn OFF the power supply.
YES
NO
Remedy the cause.
Check for excessive refrigerant
charging. CHECK 9
Replace the outdoor unit PCB
(A1P).
CHECK 4
Continuity check in the power
transistor (IGBT). Is the
continuity normal?
NO
Replace the outdoor unit PCB
(A1P).
YES
Compressor inspection.
Inspect according to the
diagnosis procedure for
abnormal noises, vibration,
operating status, etc. of the
compressor.
Note:
∗1 Secondary electronic thermal detection value
Model
RZQG71
RZQG100-140
Cooling
Detection value
12.6 or 12.2A × 260 seconds
Heating
Cooling
14.8A × 260 seconds
16.1A × 260 seconds
Heating
22.1A × 260 seconds
CHECK 2 Refer to P.168.
CHECK 4 Refer to P.170.
CHECK 9 Refer to P.174.
142
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.25 Stall Prevention (Time Lag)
Remote
Controller
Display
L9
Applicable
Models
RZQG
Method of Error
Detection
The error is detected by converting the current flowing to power transistor into voltage with CT1
(DC current sensor).
Inverter PCB detects the disorder of position signal.
Error Decision
Conditions
When compressor overload and change of load are detected when startup
Supposed
Causes
„
„
„
„
Service Diagnosis
Stop valve is not opened.
Pressure differential startup
Defective outdoor unit inverter PCB
Defective compressor (lock)
143
Troubleshooting by Remote Controller
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Check the installation conditions.
Is the stop valve open?
NO
Open the stop valve.
YES
Is the difference
between high and low pressure
before startup not more
than 0.2MPa?
NO
Insufficient pressure
equalization.
Check refrigerant system.
YES
Turn OFF the power supply, and then
disconnect the connection between
the compressor and inverter.
CHECK 4
Continuity check in the power
transistor (IGBT). Is the
continuity normal?
NO
Replace the outdoor unit PCB
(A1P).
YES
The
compressor is grounded and
short circuited.
YES
Replace the compressor.
NO
Compressor inspection.
Inspect according to the
diagnosis procedure for
abnormal noises, vibration,
operating status, etc. of the
compressor.
CHECK 4 Refer to P.170.
144
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.26 Transmission System Abnormality (between Control and
Inverter PCB)
LC
Remote
Controller
Display
Applicable
Models
RZQG
Method of Error
Detection
Check whether transmission between control and inverter PCB is carried out normally.
Error Decision
Conditions
When the transmission is not carried out in a specified period of time or longer
Supposed
Causes
„
„
„
„
Defective outdoor fan motor
Defective of fan motor connector contact
Defective control and inverter PCB
External factor (Noise, etc.)
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is the fan motor
connector connected?
NO
Connect the connector.
YES
Disconnect the fan motor connector,
and turn ON again.
“E7” is displayed?
(“LC” is not displayed?)
NO
YES
Replace the fan motor.
Inverter transmission
defective due to the error
of fan motor.
Replace the outdoor PCB
(A1P).
Service Diagnosis
145
Troubleshooting by Remote Controller
SiBE281013
4.27 Open Phase or Power Supply Voltage Imbalance
P1
Remote
Controller
Display
Applicable
Models
RZQG
Method of Error
Detection
The error is detected according to the voltage waveform of main circuit capacitor built in
inverter.
Error Decision
Conditions
When the aforementioned voltage waveform becomes identical with the waveform of the power
supply open phase.
Supposed
Causes
„ Open phase
„ Voltage imbalance between phases
„ Defective outdoor unit PCB
 • Defective main circuit capacitor
 • Power unit (Disconnection in diode module)
 • Defective magnetic relay (K1R, K10R)
 • Improper main circuit wiring
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Measure the power supply voltage
between 3 phases. (R-S, S-T, T-R)
YES
Is the voltage
rated 10%?
YES
Field factors
NO
Is the voltage
imbalance between phases
less than ±10%?
NO
Field factors
YES
Replace the outdoor unit
inverter PCB.
146
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.28 Defective Capacity Setting
PJ
Remote
Controller
Display
Applicable
Models
RZQG
Method of Error
Detection
Check whether set value written in E2PROM (at factory) or set value of capacity setting adaptor
(for spare) is the same as outdoor unit capacity.
Error Decision
Conditions
When the set value on E2PROM differs from the outdoor unit capacity or a capacity setting
adaptor except for PCB applicable models is installed. (Error decision is made only when
turning the power supply ON.)
Supposed
Causes
„ Improper set value of E2PROM
„ Improper capacity setting adaptor
„ Mismatching of type of PCB
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Has the PCB
been replaced?
NO
YES
Is the type of
PCB correct?
NO
Replace with a correct PCB.
YES
Is
the correct
capacity setting
adaptor connected to
the outdoor unit
PCB?
(∗)
NO
Mount the correct capacity
setting adaptor correctly.
YES
Reset, and then restart.
Note:
∗ Capacity setting adaptor is not connected at factory. (Capacity is written in E²PROM.) Capacity setting
adaptor is required only when the PCB was replaced with a spare PCB.
Service Diagnosis
147
Troubleshooting by Remote Controller
SiBE281013
4.29 Refrigerant Shortage (Alert)
U0
Remote
Controller
Display
Applicable
Models
RZQG
Method of Error
Detection
Refrigerant shortage is detected according to the electronic expansion valve opening degree
and measured temperatures and pressures.
Error Decision
Conditions
(In cooling operation)
When the electronic expansion valve opens fully and low pressure is below 0.25 MPa
continuously for 30 seconds.
(In heating operation)
When the electronic expansion valve opens fully and the suction superheat is large (more than
20°C) continuously for 60 seconds.
∗ Even if error occurs, operation will continue.
„ Stop valve is not opened
„ Insufficient refrigerant amount
„ Clogged refrigerant piping system
Supposed
Causes
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is the refrigerant
amount appropriate?
NO
YES
Collect refrigerant. After vacuum
drying is complete, charge an
appropriate amount of
refrigerant.
CHECK 10
Check the refrigerant piping
system for clogging.
Note:
∗ Refrigerant shortage alarm is indicated but operation continues.
CHECK 10 Refer to P.175.
148
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.30 Refrigerant Shortage (Error)
Remote
Controller
Display
U0
Applicable
Models
RZQG
Method of Error
Detection
(In cooling)
Detection based on difference in temperature between temperature set by remote controller and
indoor suction air temperature, electronic expansion valve opening degree, compressor
frequency and low pressure.
(In heating)
Detection based on difference in temperature between temperature set by remote controller and
indoor suction air temperature, electronic expansion valve opening degree during the control of
suction air superheating, high pressure, indoor heat exchanger temperature and indoor suction
air temperature.
Error Decision
Conditions
(In cooling)
When compressor frequency does not increase even though the load is heavy because the
electronic expansion valve is opened to the fullest extent
(In heating)
When suction gas superheat degree is large, compressor frequency is low and the electronic
expansion valve is opened to the fullest extent even though heating load is heavy
[If high pressure is lower than saturated pressure for indoor heat exchanger temperature (or
indoor suction air temperature), error is confirmed.]
Supposed
Causes
Service Diagnosis
„
„
„
„
Refrigerant shortage
Clogged refrigerant piping system
Mismatching of wiring and piping
Stop valve is not opened
149
Troubleshooting by Remote Controller
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
CHECK 10
Check for refrigerant shortage.
Is
the refrigerant amount
proper?
NO
Collect refrigerant and recharge
a proper amount of refrigerant
after vacuum drying.
YES
Check the inter-unit wiring and piping
between the indoor and outdoor units.
Is wiring and piping
connection matched?
NO
Match wiring and piping
connection.
YES
CHECK 10
Check the refrigerant piping
system for clogging.
CHECK 10 Refer to P.175.
150
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.31 Power Supply Voltage Abnormality
Remote
Controller
Display
U2
Applicable
Models
RZQG
Method of Error
Detection
The error is detected according to the voltage of main circuit capacitor built in the inverter and
power supply voltage.
Error Decision
Conditions
When the voltage of main circuit capacitor built in the inverter and power supply voltage drop or
when the power failure of several tens of ms or more is generated.
Supposed
Causes
„
„
„
„
„
Service Diagnosis
Drop in power supply voltage
Defective outdoor fan motor
Instantaneous power failure
Defective outdoor unit inverter PCB
Main circuit parts damaged
151
Troubleshooting by Remote Controller
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is the power
supply voltage between
200±10% VAC?
NO
Field factors
YES
Remove the connector for fan motor
on the PCB, and operate.
NO
"U2" is displayed?
YES
Is the fan
motor normal?
(Refer to troubleshooting
"E7" )
NO
Replace the fan motor.
YES
CHECK 6
Is the resistance valve is
above the criteria?
NO
Replace the fan motor.
YES
NO
Is the wiring correct?
Correct the wiring.
YES
When the compressor is running,
measure the voltage between + and of electrolytic capacitor (C+, C-).
Is the
measured voltage
220 VDC or more?
YES
Monitor the voltage
(Instantaneous voltage drop)
NO
Replace the outdoor unit PCB.
CHECK 6 Refer to P.172.
152
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.32 Transmission Error between Indoor and Outdoor Unit
Remote
Controller
Display
U4
Applicable
Models
RZQG
Method of Error
Detection
The error is generated when the micro-processor detects that the transmission between the
indoor and the outdoor unit is not normal over a certain amount of time.
Error Decision
Conditions
When the transmission is not carried out normally over a certain amount of time.
Supposed
Causes
„
„
„
„
„
„
„
„
Service Diagnosis
Wiring indoor-outdoor transmission wire is incorrect
Defective indoor unit PCB
Defective outdoor unit PCB
Burning out fuse
Defective outdoor fan motor
External factor (Noise, etc.)
Defective power supply
Disconnection of optional equipments
153
Troubleshooting by Remote Controller
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is the
power supply voltage
between 180 and
220 VAC?
NO
Field factor
YES
Continue the
condition that the
blinking interval of HAP on
outdoor unit PCB is short (∗1)
for more than one
minute.
YES
(The phases of connecting lines of indoor and
outdoor unit do not fit each other.)
Connect the connecting line of
indoor and outdoor unit
correctly.
NO
Is
there miswiring,
a wrong wire type, loose
terminal or contact failure in the inter-unit
wiring between the indoor
and outdoor
units?
NO
Wire correctly and securely
fasten the terminal screws.
YES
NO
Is any
optional accessory (∗2)
connected?
YES
Is the
power for
the optional accessory
supplied from between 1 and 2
on terminal block
X2M?
NO
Wire correctly.
YES
Is HAP
on the outdoor unit PCB
blinking?
YES
B
NO
Turn OFF the power supply and
disconnect the connector of the
outdoor fan motor. Then turn the
power ON again.
Is HAP
on the outdoor unit PCB
blinking? (∗1)
YES
Replace the outdoor fan motor.
NO
A
154
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
A
YES
Check the resistance value of the
outdoor fan motor.
Is the
resistance value of the
outdoor fan motor
normal?
NO
Replace the outdoor fan motor.
YES
Does the fuse (F6U)
have continuity?
NO
Make the fuse normal.
• In case of a fuse can be
replaced, replace the fuse.
• In case of a fuse cannot be
replaced, replace PCB.
YES
After turning OFF the power supply,
correctly insert the connector of the
fan motor and then restore the power.
YES
Error is displayed again?
B
YES
Replace the outdoor unit PCB
(A1P).
NO
"U4" or "UF" is displayed?
YES
Replace the indoor unit PCB.
NO
There is no problem with the
unit. An external factor (noise,
etc.) other than unit failure may
be the cause.
Note:
∗1 ON for 0.2 second and OFF for 0.2 second (Blink about 25 times for 10 seconds)
(Normally, ON for 0.4 second and OFF for 0.4 second (Blink about 12 times for 10 seconds))
∗2 Optional accessories refer to adaptor for wiring, auto grill and other accessories.
Service Diagnosis
155
Troubleshooting by Remote Controller
SiBE281013
4.33 Transmission Error Between Remote Controller and
Indoor Unit
U5
Remote
Controller
Display
Applicable
Models
All models of indoor unit
Method of Error
Detection
The error is generated when the micro-computer detects that the transmission between the
indoor and the outdoor unit is not normal over a certain amount of time.
Error Decision
Conditions
Normal transmission does not continue for specified period.
Supposed
Causes
„
„
„
„
Connection of two main remote controllers (when using 2 remote controllers)
Defective remote controller
Defective of indoor unit PCB
External factor (Noise, etc.)
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Using
2-remote controllers
control.
YES
NO
All indoor
PCB micro-computer
monitors blink.
YES
Set one remote controller to "SUB";
turn the power supply off once and
then back on.
NO
NO
YES
Operation
returns to normal when
the power is turned off
momentarily.
NO
Replace indoor unit PCB.
YES
There is possibility of error caused
by noise. Check the surrounding
area and turn on again.
Replace the remote controller
Is it normal?
SS1 of
both remote controllers
is set to "MAIN."
YES
Normal
NO
Replace the indoor unit PCB, and
then restart.
Is it normal?
YES
Normal
NO
There is possibility of error caused
by noise. Check the surrounding
area and turn on again.
156
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.34 Transmission Error between MAIN Remote Controller
and SUB Remote Controller
U8
Remote
Controller
Display
Applicable
Models
All models of indoor units
Method of Error
Detection
In case of controlling with 2- remote controller, check the system using micro-computer if signal
transmission between indoor unit and remote controller (main and sub) is normal.
Error Decision
Conditions
The error is generated when, in case of controlling with 2 remote controllers, the microprocessor detects that the transmission between the indoor unit and the remote controllers
(MAIN and SUB) is not normal over a certain amount of time.
Supposed
Causes
„
„
„
„
Setting failure with remote controller
Connection among SUB remote controllers
Defective remote controller PCB
Disconnection of remote controller wiring
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Controlling with
2-remote controller
NO
YES
Both SS-1
switches on remote controllers
are turned to SUB
YES
SS-1 switch
on remote controller PCB is
turned to MAIN
NO
YES
NO
Is there
continuity in remote controller
wiring?
NO
YES
Turn the SS-1 switch of one
remote controller to MAIN.
Turn OFF the power supply, and
restart operation.
Turn OFF the power once and
restart operation.
Replace the remote controller
PCB if any error is generated.
Replace the remote controller
wiring.
Turn the SS-1 switch of one
remote controller to MAIN.
Turn OFF the power supply, and
restart operation.
Service Diagnosis
157
Troubleshooting by Remote Controller
SiBE281013
4.35 Field Setting Switch Abnormality
Remote
Controller
Display
Applicable
Models
UA
All models of indoor unit
Method of Error
Detection
Error Decision
Conditions
Incorrect combination indoor unit and outdoor unit
Improper field setting
Supposed
Causes
„
„
„
„
„
„
„
„
„
158
Defective indoor unit PCB and wrong wiring
Defective power supply PCB connection
Indoor-outdoor, indoor-indoor unit transmission wiring
Defective remote controller wiring
Defective indoor unit PCB
Failure for setting the number of simultaneous multi-units
Wrong wiring of crossing transition wire
Defective multi remote controller connection
Faulty connection of optional equipment
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Are
the remote
controllers connected to
several indoor units?
YES
Adopt only one of the remote
controllers.
NO
Is
the remote
controller wiring jumped
between indoor units?
YES
Remove the jumper.
(Group control in the same
system is not allowed.)
NO
Is the
field setting for pair
system correct?
NO
Set correctly.
YES
Do
the microcomputer normal
monitors (HAP) on all indoor
unit PCB blink?
NO
YES
Are
the wires
between indoor-outdoor
correctly connected?
NO
Connect correctly.
YES
Is the
power supply
for the option device connected
from 1 and 2 of X2M?
NO
Connect correctly.
YES
Is the
power supply PCB
correctly connected?
NO
Connect correctly.
YES
Is 220
VAC between 1 and 2 of
X2M?
Turn OFF the power supply once,
and turn the power ON to restart.
YES
Check the power supply system
inside the indoor unit.
NO
Could be wrong wiring.
Check again.
Is it normal?
YES
NO
Are
the wires between
indoor-outdoor correctly
connected?
NO
Connect correctly.
YES
Replace the indoor unit PCB.
Normal
Service Diagnosis
159
Troubleshooting by Remote Controller
SiBE281013
4.36 “UC” Address Duplication of Centralized Controller
UC
Remote
Controller
Display
Applicable
Models
All models of indoor unit
Centralized controller
Method of Error
Detection
The principal indoor unit detects the same address as that of its own on any other indoor unit.
Error Decision
Conditions
The error decision is made as soon as the abnormality aforementioned is detected.
Supposed
Causes
„ Address duplication of centralized controller
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
The centralized address is duplicated.
160
Make setting change so that the
centralized address will not be
duplicated.
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.37 Transmission Error Between Centralized Controller and
Indoor Unit
Remote
Controller
Display
UE
Applicable
Models
All models of indoor units
Centralized controller
Schedule timer
Method of Error
Detection
Micro-computer checks if transmission between indoor unit and centralized controller is normal.
Error Decision
Conditions
When transmission is not carried out normally for a certain amount of time
Supposed
Causes
„
„
„
„
„
Service Diagnosis
Transmission error between centralized control and indoor unit
Defective PCB for central remote controller
Defect of indoor unit PCB
Breaking and wrong wiring of connecting wire
Failure of the setting of group No. and address
161
Troubleshooting by Remote Controller
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Are
there any
breaking and wrong wiring
of the connecting
wires?
NO
Make the wiring correct.
YES
Is
the onceconnected indoor unit
equipment disconnected or the
address changed?
YES
Reset the all remote controllers
power supply at the same time.
NO
Does transmission error
occur to all indoor units?
NO
YES
Is the group No. for the
defective indoor unit?
NO
Make correct setting of the
centralized control group No.
YES
Replace the indoor unit PCB.
Are
there any
breaking and wrong
wiring of the connecting wires
to the centralized
controller?
NO
Correctly connect the wiring.
YES
Is the
centralized
controller setting connector
for the centralized controller
unit disconnected?
NO
Correctly connect the connector.
YES
Replace the remote controller
PCB.
162
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.38 Transmission Error between Indoor and Outdoor Unit /
Piping and Wiring Mismatch / Refrigerant Shortage
Remote
Controller
Display
UF
Applicable
Models
RZQG
Method of Error
Detection
Check the transmission between the indoor and outdoor units with a micro-computer when the
power turned ON.
Detect by checking the following temperature differences during compressor operation.
A: Difference in temperature detected by the indoor heat exchanger thermistor (R2T) and
the indoor suction air thermistor (R1T)
B: Difference in evaporation temperature (Te) (or condensation temperature (Tc) during
heating operation) detected by the indoor heat exchanger thermistor (R2T) and the
compressor sensor
Error Decision
Conditions
When the inter-unit wiring between the indoor and outdoor units is incorrect
When the following conditions continue for 20 minutes during compressor operation
A: R2T – R1T < 4ºC, and
B: R2T – Te (or Tc during heating operation) > 14ºC (24ºC during heating operation)
Supposed
Causes
„
„
„
„
Service Diagnosis
Defective inter-unit wiring between the indoor and outdoor units
Mismatching of wiring and piping
Refrigerant shortage (shortage of gas)
Clogged refrigerant piping system
163
Troubleshooting by Remote Controller
SiBE281013
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Does "UF"
appear when the power
is turned ON?
YES
The phase of inter-unit wiring between
the indoor and outdoor units is
incorrect.
NO
Continue the
condition that the blinking
interval of HAP on outdoor unit
PCB is short (∗1) for more
than one minute.
Is the
connection of
inter-unit wiring and piping
between the indoor and outdoor
units matched?
The phase of inter-unit wiring between
the indoor and outdoor units is
incorrect.
Correctly connect inter-unit
wiring between the indoor and
outdoor units.
NO
Match the connection of the
inter-unit wiring and piping
between the indoor and outdoor
units.
NO
Recharge a proper amount of
refrigerant after refrigerant
recovery and vacuum drying.
YES
CHECK 11
Is the refrigerant
level proper?
Correctly connect inter-unit
wiring between the indoor and
outdoor units.
YES
CHECK 10
Check the refrigerant piping
system for clogging.
Note:
∗1 ON for 0.2 second and OFF for 0.2 second (Blink about 25 times for 10 seconds)
(Normally, ON for 0.4 second and OFF for 0.4 second (Blink about 12 times for 10 seconds))
CHECK 10 Refer to P.175.
CHECK 11 Refer to P.176.
164
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
4.39 Check
CHECK 1 Check the Thermistors
Thermistors
If the cause of the problem is related to the thermistors, then the thermistors should be checked prior to
changing the PCB.
For more information about these thermistors, see:
„ “Wiring Diagrams’’ on P.180
„ “Functions of Main Components and Thermistors” on P.25
Overview of Thermistors
The table below contains an overview of the thermistors:
Indoor
FCQG, FHQG
Thermistor
R1T
R2T
Suction air thermistor
Heat exchanger thermistor
R3T
Intermediate heat exchanger thermistor
Outdoor
RZQG
Thermistor
R1T
R2T
Outdoor air thermistor
Discharge pipe thermistor
R3T
R4T
Suction pipe thermistor
Heat exchanger distributor pipe thermistor
R5T
R6T
Intermediate heat exchanger thermistor
Liquid pipe thermistor
R10T
Radiation fin thermistor
Checking
To check the thermistors, proceed as follows:
Step
Action
1
2
Disconnect the thermistor from the PCB
Read the temperature and the resistor value.
3
Check if the measured values correspond with the values in the table on the next pages.
Service Diagnosis
165
Troubleshooting by Remote Controller
SiBE281013
Thermistor Resistance / Temperature Characteristics
Indoor unit
Outdoor unit
166
FCQG, FHQG
R1T
R2T
R3T
Thermistor
Suction air thermistor
Heat exchanger thermistor
Intermediate heat exchanger thermistor
RZQG
R1T
R3T
R4T
R5T
R6T
R10T
Thermistor
Outdoor air thermistor
Suction pipe thermistor
Heat exchanger distributor pipe
Intermediate heat exchanger thermistor
Liquid pipe thermistor
Radiation fin thermistor
TºC
-10
-8
-6
-4
-2
kΩ
88.0
79.1
71.1
0
2
4
6
8
64.1
57.8
52.3
47.3
42.9
10
12
14
16
18
38.9
35.3
32.1
29.2
26.6
20
22
24
26
28
24.3
22.2
20.3
18.5
17.0
30
32
34
36
38
15.6
14.2
13.1
12.0
11.1
40
42
44
46
48
10.3
9.5
8.8
8.2
7.6
50
52
54
56
58
7.0
6.7
6.0
5.5
5.2
60
62
64
66
68
4.79
4.46
4.15
3.87
3.61
70
72
74
76
78
3.37
3.15
2.94
2.75
2.51
80
82
84
86
88
2.41
2.26
2.12
1.99
1.87
90
92
94
96
98
1.76
1.65
1.55
1.46
1.38
T°C
-20
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
kΩ
197.81
186.53
175.97
166.07
156.80
148.10
139.94
132.28
125.09
118.34
111.99
106.03
100.41
95.14
90.17
85.49
81.08
76.93
73.01
69.32
65.84
62.54
59.43
56.49
53.71
51.09
48.61
46.26
44.05
41.95
39.96
38.08
36.30
34.62
33.02
31.50
30.06
28.70
27.41
26.18
25.01
23.91
22.85
21.85
20.90
20.00
19.14
18.32
17.54
16.80
16.10
T°C
-19.5
-18.5
-17.5
-16.5
-15.5
-14.5
-13.5
-12.5
-11.5
-10.5
-9.5
-8.5
-7.5
-6.5
-5.5
-4.5
-3.5
-2.5
-1.5
-0.5
0.5
1.5
2.5
3.5
4.5
5.5
6.5
7.5
8.5
9.5
10.5
11.5
12.5
13.5
14.5
15.5
16.5
17.5
18.5
19.5
20.5
21.5
22.5
23.5
24.5
25.5
26.5
27.5
28.5
29.5
30.5
kΩ
192.08
181.16
170.94
161.36
152.38
143.96
136.05
128.63
121.66
115.12
108.96
103.18
97.73
92.61
87.79
83.25
78.97
74.94
71.14
67.56
64.17
60.96
57.94
55.08
52.38
49.83
47.42
45.14
42.98
40.94
39.01
37.18
35.45
33.81
32.25
30.77
29.37
28.05
26.78
25.59
24.45
23.37
22.35
21.37
20.45
19.56
18.73
17.93
17.17
16.45
15.76
T°C
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
kΩ
16.10
15.43
14.79
14.18
13.59
13.04
12.51
12.01
11.52
11.06
10.63
10.21
9.81
9.42
9.06
8.71
8.37
8.05
7.75
7.46
7.18
6.91
6.65
6.41
6.65
6.41
6.18
5.95
5.74
5.14
4.96
4.79
4.62
4.46
4.30
4.16
4.01
3.88
3.75
3.62
3.50
3.38
3.27
3.16
3.06
2.96
2.86
2.77
2.68
2.60
2.51
T°C
30.5
31.5
32.5
33.5
34.5
35.5
36.5
37.5
38.5
39.5
40.5
41.5
42.5
43.5
44.5
45.5
46.5
47.5
48.5
49.5
50.5
51.5
52.5
53.5
54.5
55.5
56.5
57.5
58.5
59.5
60.5
61.5
62.5
63.5
64.5
65.5
66.5
67.5
68.5
69.5
70.5
71.5
72.5
73.5
74.5
75.5
76.5
77.5
78.5
79.5
80.5
kΩ
15.76
15.10
14.48
13.88
13.31
12.77
12.25
11.76
11.29
10.84
10.41
10.00
9.61
9.24
8.88
8.54
8.21
7.90
7.60
7.31
7.04
6.78
6.53
6.53
6.53
6.53
6.06
5.84
5.43
5.05
4.87
4.70
4.54
4.38
4.23
4.08
3.94
3.81
3.68
3.56
3.44
3.32
3.21
3.11
3.01
2.91
2.82
2.72
2.64
2.55
2.47
Service Diagnosis
SiBE281013
Outdoor unit
Troubleshooting by Remote Controller
RZQG
R2T
Thermistor
Discharge pipe thermistor
T°C
kΩ
T°C
kΩ
T°C
kΩ
T°C
kΩ
T°C
kΩ
T°C
kΩ
0
640.44
0.5
624.65
50
72.32
50.5
70.96
100
13.35
100.5
13.15
1
609.31
1.5
594.43
51
69.64
51.5
68.34
101
12.95
101.5
12.76
2
579.96
2.5
565.78
52
67.06
52.5
65.82
102
12.57
102.5
12.38
3
552.00
3.5
538.63
53
64.60
53.5
63.41
103
12.20
103.5
12.01
4
525.63
4.5
512.97
54
62.24
54.5
61.09
104
11.84
104.5
11.66
5
500.66
5.5
488.67
55
59.97
55.5
58.87
105
11.49
105.5
11.32
6
477.01
6.5
465.65
56
57.80
56.5
56.75
106
11.15
106.5
10.99
7
454.60
7.5
443.84
57
55.72
57.5
54.70
107
10.83
107.5
10.67
8
433.37
8.5
423.17
58
53.72
58.5
52.84
108
10.52
108.5
10.36
9
413.24
9.5
403.57
59
51.98
59.5
50.96
109
10.21
109.5
10.06
10
394.16
10.5
384.98
60
49.96
60.5
49.06
110
9.92
110.5
9.78
11
376.05
11.5
367.35
61
48.19
61.5
47.33
111
9.64
111.5
9.50
12
358.88
12.5
350.62
62
46.49
62.5
45.67
112
9.36
112.5
9.23
13
342.58
13.5
334.74
63
44.86
63.5
44.07
113
9.10
113.5
8.97
14
327.10
14.5
319.66
64
43.30
64.5
42.54
114
8.84
114.5
8.71
15
312.41
15.5
305.33
65
41.79
65.5
41.06
115
8.59
115.5
8.47
16
298.45
16.5
291.73
66
40.35
66.5
39.65
116
8.35
116.5
8.23
17
285.18
17.5
278.80
67
38.96
67.5
38.29
117
8.12
117.5
8.01
18
272.58
18.5
266.51
68
37.63
68.5
36.98
118
7.89
118.5
7.78
19
260.60
19.5
254.72
69
36.34
69.5
35.72
119
7.68
119.5
7.57
20
249.00
20.5
243.61
70
35.11
70.5
34.51
120
7.47
120.5
7.36
21
238.36
21.5
233.14
71
33.92
71.5
33.35
121
7.26
121.5
7.16
22
228.05
22.5
223.08
72
32.78
72.5
32.23
122
7.06
122.5
6.97
23
218.24
23.5
213.51
73
31.69
73.5
31.15
123
6.87
123.5
6.78
24
208.90
24.5
204.39
74
30.63
74.5
30.12
124
6.69
124.5
6.59
25
200.00
25.5
195.71
75
29.61
75.5
29.12
125
6.51
125.5
6.42
26
191.53
26.5
187.44
76
28.64
76.5
28.16
126
6.33
126.5
6.25
27
183.46
27.5
179.57
77
27.69
77.5
27.24
127
6.16
127.5
6.08
28
175.77
28.5
172.06
78
26.79
78.5
26.35
128
6.00
128.5
5.92
29
168.44
29.5
164.90
79
25.91
79.5
25.49
129
5.84
129.5
5.76
30
161.45
30.5
158.08
80
25.07
80.5
24.66
130
5.69
130.5
5.61
31
154.79
31.5
151.57
81
24.26
81.5
23.87
131
5.54
131.5
5.46
32
148.43
32.5
145.37
82
23.48
82.5
23.10
132
5.39
132.5
5.32
33
142.37
33.5
139.44
83
22.73
83.5
22.36
133
5.25
133.5
5.18
34
136.59
34.5
133.79
84
22.01
84.5
21.65
134
5.12
134.5
5.05
35
131.06
35.5
128.39
85
21.31
85.5
20.97
135
4.98
135.5
4.92
36
125.79
36.5
123.24
86
20.63
86.5
20.31
136
4.86
136.5
4.79
37
120.76
37.5
118.32
87
19.98
87.5
19.67
137
4.73
137.5
4.67
38
115.95
38.5
113.62
88
19.36
88.5
19.05
138
4.61
138.5
4.55
39
111.35
39.5
109.13
89
18.75
89.5
18.46
139
4.49
139.5
4.44
40
106.96
40.5
104.84
90
18.17
90.5
17.89
140
4.38
140.5
4.32
41
102.76
41.5
100.73
91
17.61
91.5
17.34
141
4.27
141.5
4.22
42
98.75
42.5
96.81
92
17.07
92.5
16.80
142
4.16
142.5
4.11
43
94.92
43.5
93.06
93
16.54
93.5
16.29
143
4.06
143.5
4.01
44
91.25
44.5
89.47
94
16.04
94.5
15.79
144
3.96
144.5
3.91
45
87.74
45.5
86.04
95
15.55
95.5
15.31
145
3.86
145.5
3.81
46
84.38
46.5
82.75
96
15.08
96.5
14.85
146
3.76
146.5
3.72
47
81.16
47.5
79.61
97
14.62
97.5
14.40
147
3.67
147.5
3.62
48
78.09
48.5
76.60
98
14.18
98.5
13.97
148
3.58
148.5
3.54
49
75.14
49.5
73.71
99
13.76
99.5
13.55
149
3.49
149.5
3.45
50
72.32
50.5
70.96
100
13.35
100.5
13.15
150
3.41
150.5
3.37
Service Diagnosis
167
Troubleshooting by Remote Controller
CHECK 2
SiBE281013
Evaluation of Abnormal High Pressure
Abnormally high pressure level is mostly caused by the condenser side. The following contents are provided
by service engineer based on their field checks. Further, the number is listed in the order of degree of
influence.
In Cooling Operation
Check items (Possible causes)
Judgement
Does the outdoor unit fan run normally?
Visual inspection
Is the outdoor unit heat exchanger clogged?
Visual inspection
Is there clogging before or after the EV (capillary)?
Check if there is a temperature difference before and
after EV (capillary).
Check if the main valve unit of EV operates
(by noise, vibration).
Is the check valve clogged?
Check if there is a temperature difference before and
after check valve.
→ If YES, the check valve is caught.
Is the HPS normal? ∗
Check continuity by using a tester.
Is the outdoor unit installed under such conditions that
short circuit easily occurs?
Visual inspection
Is the piping length 5 meters or less?
Visual inspection
Does air enter the refrigerant system?
Conduct refrigerant collection and vacuum drying, and
then add proper amount refrigerant.
Is the refrigerant overcharged?
Conduct refrigerant collection and vacuum drying, and
then add proper amount refrigerant.
In Heating Operation
168
Check items (Possible causes)
Judgement
Does the indoor unit fan run normally?
Visual inspection
Is the indoor unit heat exchanger clogged?
Visual inspection
Is the indoor unit installed under such conditions that
short circuit easily occurs?
Visual inspection
Is there clogging before or after the EV (capillary)?
Check if there is a temperature difference before and
after EV (capillary).
Check if the main valve unit of EV operates
(by noise, vibration).
Is the check valve clogged?
Check if there is a temperature difference before and
after check valve.
→ If YES, the check valve is caught.
Is the HPS normal?
Check continuity using a tester.
Is the piping length 5 meters or less?
Visual inspection
Does air enter the refrigerant system?
Conduct refrigerant collection and vacuum drying, and
then add proper amount refrigerant.
Is the refrigerant overcharged?
Conduct refrigerant collection and vacuum drying, and
then add proper amount refrigerant.
Service Diagnosis
SiBE281013
CHECK 3
Troubleshooting by Remote Controller
Evaluation of Abnormal Low Pressure
Abnormally low pressure level is mostly caused by the evaporator side. The following contents are provided
based on field checking of service engineer. Further, the number is listed in the order of degree of influence.
In Cooling Operation
Check items (Possible causes)
Judgement
Does the outdoor unit fan run normally?
Visual inspection
Is the indoor unit filter clogged?
Visual inspection
Is there clogging before or after the EV (capillary)?
Check if there is a temperature difference before and
after EV (capillary).
Check if the main valve unit of EV operates (by noise,
vibration).
Is the check valve clogged?
Check if there is a temperature difference before and
after check valve.
→ If YES, the check valve is caught.
Is the indoor unit installed under such conditions that
short circuit easily occurs?
Visual inspection
Is the refrigerant gas short?
Conduct refrigerant collection and vacuum drying, and
then add proper amount refrigerant.
In Heating Operation
Check items (Possible causes)
Judgement
Does the outdoor unit fan run normally?
Visual inspection
Is the outdoor unit heat exchanger clogged?
Visual inspection
Is the outdoor unit installed under such conditions that
short circuit easily occurs?
Visual inspection
Is there clogging before or after the EV (capillary)?
Check if there is a temperature difference before and
after EV (capillary).
Check if the main valve unit of EV operates (by noise,
vibration).
Is the check valve clogged?
Check if there is a temperature difference before and
after check valve.
→ If YES, the check valve is caught.
Is the refrigerant gas short?
Conduct refrigerant collection and vacuum drying, and
then add proper amount refrigerant.
Service Diagnosis
169
Troubleshooting by Remote Controller
CHECK 4
SiBE281013
Check for Power Transistor
Judgement according to the continuity check by using an analog tester:
(1) Do not touch the charged area (high voltage) for 10 minutes after turning the power supply off.
(2) If you must touch such an area, make sure that the power supply voltage of power transistor is 50 V or
less.
(3) Disconnect the connector of the outdoor unit fan motor.
When the outdoor unit fan is rotating against a strong wind, the condenser is charged and electric shock
may result. Therefore, disconnect the connector from the outdoor unit fan motor after confirming that the
outdoor unit fan has stopped.
(4) Before measuring the continuity, disconnect the connection between compressor and power transistor.
(5) Measure the continuity in the following procedure.
[Judgement] Normal if the continuity check results in the following.
Power transistor (on inverter PCB)
C+— U
Continuity
C+— V
Continuity
C+— W
Continuity
U — C+
V — C+
W — C+
∞
∞
∞
C- — W
∞
∞
∞
U — C-
Continuity
C- — U
∗
C- — V
V — C-
Continuity
W — C-
Continuity
∗
Note:
∗ If there is continuity, the resistance should be the same as each phase.
∗ If a digital tester is used for the measurement of continuity, ∞ and continuity may be reversed.
170
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
CHECK 5 Check Pressure Sensor
Measure the voltage (DC) between pins 1 and 3 of the connector.
Outdoor unit PCB (A1P)
+5V
Red
Black
GND
White
Micr-ocomputer
A/D input
Pressure sensor
Connector Red
Measure DC voltage here.
Detected Pressure
PH
(Kg/cm²) MPa
51.0 5.0
45.9 4.5
40.8 4.0
35.7 3.5
30.6 3.0
PH
25.5 2.5
20.4 2.0
15.3 1.5
10.2 1.0
5.1 0.5
0 0
-5.1 -0.5
-0.5
PH = 1.38VH – 0.69
PH : Detected pressure (MPa)
VH : Output voltage (V)
0
0.5
1
1.5
2
2.5
Output voltage (VH)
3
3.5
4
VDC
This graph is available for both high pressure sensor
and low pressure sensor.
Service Diagnosis
171
Troubleshooting by Remote Controller
CHECK 6
SiBE281013
Fan Motor Signal Line
(1) Turn the power supply off.
(2) With the fan motor connector disconnected, measure the resistance between each pin, then make sure
that the resistance is more than the value mentioned in the following table.
1 White
2 Orange
3 Brown
GND
4 Blue
5
Measurement point
Judgement
1-4
2-4
1MΩ or more
100kΩ or more
3-4
4-7
100Ω or more
100kΩ or more
6
7 Red
CHECK 7
Electronic expansion valve connector and coil resistance criteria
1 Orange
Measurement point
2 Red
3 Yellow
4 Black
1-5
3-5
2-6
4-6
Judgement
40~50Ω
5 Gray
6 White
172
Service Diagnosis
SiBE281013
CHECK 8
Troubleshooting by Remote Controller
Check for Factors Causing Wet Operation
Referring to the Fault Tree Analysis (FTA) shown below, identify the faulty points.
Refrigerant
dwelling
Faulty crankcase heater
Frequent starts and stops of the compressor
← Refer to CHECK 9 .
Excessive refrigerant charging
Faulty valve coil
Faulty electronic
expansion valve
Faulty valve body
Faulty superheat
degree control
Faulty control
Wet operation
Faulty low pressure sensor
← Are the voltage characteristics normal?
Faulty suction pipe thermistor
← Is the connector properly connected?
Are the thermistor resistance
characteristics normal?
← Is the pressure value checked with
the Service Checker corresponding
to the measurement of the sensor?
Faulty control PCB
Dirty evaporator
Decreased
evaporation
capacity
← Is the heat exchanger clogged?
Faulty fan motor
Decreased
fan airflow
rate
← Are the coil resistance
and insulation normal?
Decreased
fan
output
Faulty control
PCB (including
capacity setting)
← Can the fan motor be
rotated with hands?
Are the motor coil
resistance and insulation
normal?
Note:
∗: Reference values for superheat degree to be used in the judgement of wet operation
� Suction pipe superheat degree: 4°C or more � Discharge pipe superheat degree: 5°C or less
(The values above must be used only for reference purposes. Even it is operated within the range above,
operation may be normal in other conditions.)
Service Diagnosis
173
Troubleshooting by Remote Controller
CHECK 9
SiBE281013
Check for Excessive Refrigerant Charging
As criteria for judging whether refrigerant is excessively charged or not, refer to the following operating
conditions.
<Diagnosis of excessive refrigerant charging>
In cooling operation
(1) Because high pressure rises due to excessive charging, overload control is carried out and capacity tends
to run short.
(2) Considering pressure load, compressor discharge pipe temperature is low.
(3) Subcooled degree of condensate liquid becomes large. Therefore, temperature of blown air passing
through subcooled part decreases in heating operation.
Cooling
High pressure
(∗1)
As compressor frequency
decreases, low pressure rises.
Low pressure
(∗2)
Compressor
frequency
Compressor frequency
Maximum frequency decreases due to high
pressure protection control
Minimum frequency
Compressor frequency
increases in order to
maintain low pressure.
Electronic expansion valve
opening degree decreases
due to wet protection control
Electronic
expansion valve
Suction
superheat degree
Discharge
superheat degree
Minimum opening degree
Suction superheat degree is approx. 0 deg.
(Degree of excessive refrigerant charging)
Adequate level
Excessive charge
Heating
High pressure
(∗1)
Low pressure
(∗2)
As compressor frequency
decreases, low pressure rises.
Compressor
frequency
Electronic
expansion valve
Minimum frequency
Compressor frequency
decreases in order to
maintain high pressure.
Electronic expansion valve
opening degree decreases
due to wet protection control
Minimum opening degree
Suction
superheat degree
Discharge
superheat degree
Suction superheat degree is approx. 0 deg.
(Degree of excessive refrigerant charging)
Adequate level
Excessive charge
Cooling
Heating
∗1
Intermediate heat
High Pressure exchanger
thermistor (∗3)
∗1
High Pressure
Pressure sensor
∗2
Low Pressure
∗2
Low Pressure
Intermediate heat
exchanger
thermistor (∗3)
Pressure sensor
∗3 This measured temperature is used to calculate the equivalent saturation pressure of the refrigerant.
(Refer to P.183.)
174
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
CHECK 10 Clogged Points
Temperature differences must occur before or after the clogged points!
1
3
3
4
5
2
ACC
Indoor Unit
COMP
Outdoor Unit
Check points
Check factor
Causes
Remedies
1
Around
expansion
mechanism
Temperature
difference
z Dust
z Choked moisture
z Reduced effective pipe
diameter due to adherent
contamination, etc.
Replace the electronic
expansion valve.
2
Accumulator
Frosting
z Choked moisture
Blow a nitrogen gas, and
then replace the
refrigerant.
3
Distributor
Temperature
difference
z Dust
z Choked moisture
z Reduced effective pipe
diameter due to adherent
contamination, etc.
Replace the heat
exchanger or distributor.
4
Field piping
Temperature
difference
z Collapsed pipe
Replace the pipe.
5
Stop valve
Temperature
difference
z The stop valve is not fully open.
Open the stop valve fully.
Service Diagnosis
175
Troubleshooting by Remote Controller
CHECK 11
SiBE281013
Check for Inadequate Refrigerant
As criteria for judging whether refrigerant is inadequate or not, refer to the following operating conditions.
<Diagnosis of inadequate refrigerant>
In cooling operation
(1) As suction superheat degree increases due to refrigerant shortage, the electronic expansion valve tends
to open (opens fully) in order to avoid overheat operation.
(2) In response to decreased evaporator capacity caused by refrigerant shortage, capacity is controlled in the
inverter in order to maintain low pressure, which results in a decrease in frequency.
(3) Because of (1) and (2) above, the compressor frequency decreases despite a large difference (large load)
between temperature set by the remote controller and indoor suction temperature, resulting that cooling
capacity becomes unavailable.
(4) If refrigerant shortage worsens, the electronic expansion valve remains fully open and suction superheat
degree further increases. In addition, because the compressor frequency drops to the level of the lowest
frequency (52 Hz) and the refrigerant flow rate decrease, low pressure cannot be maintained.
Refrigerant
shortage warning
Cooling
Abnormal refrigerant
shortage
High pressure
(∗1)
As compressor frequency
decreases, high pressure
decreases.
Actual high
pressure
(Maintains a certain
level of low pressure)
Low pressure
(∗2)
When the refrigerant flow rate
decrease, it is impossible to
maintain a low pressure.
As the electronic expansion valve
opening degree reaches the maximum,
suction superheat degree increases.
Suction superheat degree
Compressor frequency
In response to decreased evaporator capacity
caused by refrigerant shortage, capacity is
controlled in the inverter in order to maintain a low
pressure, which resulting in a decrease in frequency.
Reaches the lowest frequency
The maximum opening degree of the
electronic expansion valve (480 pulses)
Electronic expansion valve
Avoid overheat operation by
changing SH target value
(Degree of inadequate refrigerant)
Adequate level
Inadequate
Cooling
∗1
Intermediate heat
High Pressure exchanger
thermistor (∗3)
∗2
Low Pressure
Pressure sensor
∗3 This measured temperature is used to calculate the equivalent saturation pressure of the refrigerant.
(Refer to P.183.)
176
Service Diagnosis
SiBE281013
Troubleshooting by Remote Controller
<Diagnosis of inadequate refrigerant>
In heating operation
(1) As suction superheat degree increases due to refrigerant shortage, the electronic expansion valve tends
to open (opens fully) to avoid overheat operation.
(2) As suction superheat degree increases due to refrigerant shortage, compressor frequency decreases
because suction superheat degree is controlled in order to prevent oil to the outdoor heat exchanger from
being retained.
(3) Because of (1) and (2) above, evaporator capacity and compressor frequency decrease despite a large
difference (large load) between temperature set by the remote controller and indoor suction temperature,
resulting that high pressure cannot be maintained and heating capacity becomes unavailable. Also a
decrease in evaporator capacity frequently puts the system in defrost operation.
(4) If refrigerant shortage worsens, high pressure becomes smaller than saturated pressure equivalent to
indoor heat exchanger temperature (or indoor suction temperature).
Heating
Refrigerant shortage warning
High pressure
(∗1)
(Maintains a certain
level of high pressure)
Abnormal refrigerant shortage
As compressor frequency
decreases, high pressure decreases.
Indoor heat exchanger
temperature (Th2)
Indoor suction
temperature (Th1)
Low pressure
(∗2)
A decrease in evaporator
capacity frequently puts the
system in defrost operation.
Suction superheat degree increases.
Suction superheat degree
When frequency drops to the
lowest, a decrease in low
pressure becomes larger.
Drooping control by suction superheat degree
(Prevention of oil to heat exchanger from being
retained)
Compressor frequency
In response to decreased evaporator capacity
caused by refrigerant shortage, capacity is
controlled in the inverter in order to maintain high
pressure, which resulting in a rise in frequency.
Reaches the lowest frequency
The maximum opening degree of the
electronic expansion valve (480 pulses)
Electronic expansion valve
Electronic expansion valve control
by avoiding superheat operation
(Degree of inadequate refrigerant)
Adequate level
Inadequate
Heating
∗1
Pressure sensor
High Pressure
∗2
Low Pressure
Intermediate heat
exchanger
thermistor (∗3)
∗3 This measured temperature is used to calculate the equivalent saturation pressure of the refrigerant.
(Refer to P.183.)
Service Diagnosis
177
SiBE281013
Part 8
Appendix
1. Piping Diagrams..................................................................................179
1.1 RZQG71LV1B ......................................................................................179
1.2 RZQG100-140LV1B .............................................................................179
2. Wiring Diagrams..................................................................................180
2.1 Indoor Unit............................................................................................180
2.2 Outdoor Unit .........................................................................................181
3. Precautions for New Refrigerant (R-410A) .........................................182
3.1 Outline ..................................................................................................182
3.2 Refrigerant Cylinders............................................................................184
3.3 Service Tools........................................................................................185
178
Appendix
SiBE281013
Piping Diagrams
1. Piping Diagrams
1.1
RZQG71LV1B
Electronic
expansion valve
Filter
Filter
Outdoor
heat exchanger
4 way valve
Check valve
Indoor heat exchanger
Pressure
switch
(high)
HPS
Field piping φ9.5
C1220T-O
Field piping φ15.9
C1220T-O
Indoor unit
Service port
(5/16" flare)
Compressor
Accumulator
Accumulator
Compressor
Outdoor unit
Stop valve
(with service port 5/16" flare)
3D069535
1.2
RZQG100-140LV1B
Electronic
expansion valve
Filter
Filter
Outdoor
heat exchanger
4 way valve
Pressure
switch
(high)
Indoor heat exchanger
HPS
Service port
(5/16" flare)
Field piping φ9.5
C1220T-O
Field piping φ15.9
C1220T-O
Indoor unit
Appendix
Stop valve
(with service port 5/16" flare)
Compressor
Accumulator
Accumulator
Compressor
Outdoor unit
3D069536
179
Wiring Diagrams
SiBE281013
2. Wiring Diagrams
2.1
Indoor Unit
2.1.1 FCQG71-140EVEB
INDOOR UNIT
A1P
A2P
A3P
PRINTED CIRCUIT BOARD
PRINTED CIRCUIT BOARD
PRINTED CIRCUIT BOARD
(HUMIDITY SENSOR UNIT)
C21 CAPACITOR
C105 CAPACITOR
HAP LIGHT EMITTING DIODE
(SERVICE MONITOR GREEN)
~
M1F
M1P
M1S
M4S
R1T
THERMISTOR(AIR)
R2T·R3T THERMISTOR(COIL)
S1L FLOAT SWITCH
SS1 SELECTOR SWITCH(EMERGENCY)
V1R
X1M
X2M
Z1C
Z1F
PS
RC
NE
TO OUTDOOR
UNIT (NOTE 8)
1
CONNECTOR FOR OPTIONAL PARTS
X33A CONNECTOR
(ADAPTOR FOR WIRING)
X35A CONNECTOR(GROUP
CONTROL ADAPTOR)
BLK
2
WHT
3
RED
Z1F
V1R C105
+
_
X18A X17A
X15A
WIRED REMOTE CONTROLLER
(OPTIONAL ACCESSORY)
(NOTE 5)
X30A
HAP
A2P
TC
X2A
KCR
F1U
X1A
KHuR
F2U
WHT
X70A
N=1
Z1C
WHT
ORG BRN BLU RED
WHT
X4 X3 X2 X1
KFR
X65A
X33A
(NOTE 3) X20A
COMPRESSOR
OPERATION
FAN
OPERATION
Y2 ADAPTOR FOR WIRING
YC (OPTIONAL ACCESSORY)
(NOTE 4)
C21
+
_
X1A
RED
TERMINAL FOR OPERATION DISPLAY
P2 R1T
P1
SS1
PS
RC
GRN/YLW
(NOTE 2)
CENTRAL REMOTE
CONTROLLER
X1M
YLW
F2
ORG
F1
BLU
P2
BLK P1
t˚
NORM. EMG.
X27A
H05VV-U4G2.5
(NOTE 7)
DIODE BRIDGE
TERMINAL STRIP
TERMINAL STRIP
FERRITE CORE(NOISE FILTER)
NOISE FILTER
POWER SUPPLY CIRCUIT
SIGNAL RECEIVER CIRCUIT
TC SIGNAL TRANSMISSION CIRCUIT
WIRED REMOTE CONTROLLER
R1T THERMISTOR(AIR)
ADAPTOR FOR WIRING
F1U
FUSE( B , 5A, 250V)
F2U
KCR MAGNETIC RELAY
KFR MAGNETIC RELAY
KHuR MAGNETIC RELAY(Hu)
t˚
A1P
X2M
MOTOR(INDOOR FAN)
MOTOR(DRAIN PUMP)
MOTOR(SWING FLAP)
R2T R3T S1L
INDOOR UNIT GRN
HAP
X7A
MSW M3S
X9A
X10A X4A
MSW M2S
X16A
M1F MS
3~
MSW M4S
PS
t˚
X35A
M1P MS
(NOTE 3)
R1T
MSW M1S
CN1
~
A3P
NOTES
:FIELD WIRING
1.
:TERMINAL
:CONNECTOR
,
2. IN CASE USING CENTRAL REMOTE CONTROLLER, CONNECT IT TO THE UNIT
IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL.
3. X33A, X35A ARE CONNECTED WHEN THE OPTIONAL ACCESSORIES ARE BEING USED.
4. CONNECT POWER OF ADAPTOR FOR WIRING TO TERMINAL BLOCK(X2M)
OF INDOOR UNIT DIRECTLY.
5. IN CASE OF MAIN/SUB OVERCHANGE,
SEE THE INSTALLATION MANUAL ATTACHED TO REMOTE CONTROLLER.
6. SYMBOLS SHOWS AS FOLLOWS: RED:RED BLK:BLACK WHT:WHITE YLW:YELLOW GRN:GREEN
ORG:ORANGE BRN:BROWN PNK:PINK GRY:GRAY BLU:BLUE
7. SHOWS ONLY IN CASE OF PROTECTED PIPES. USE H07RN-F IN CASE OF NO PROTECTION.
8. MODEL OUTDOOR UNIT SHOWN IN THIS DIAGRAM SHOWS THE OUTLINE OF PRODUCT.
FOR THE DETAIL, SEE WIRING DIAGRAM ATTACHED TO OUTDOOR UNIT.
A3P
R1T
X33A
X1M
A2P
A1P
X35A
X2M
CONTROL BOX
3D069625
2.1.2 FHQG71-140CVEB
INDOOR UNIT
H3P LIGHT EMITTING DIODE
(FILTER SIGN-RED)
A1P PRINTED CIRCUIT BOARD
C105 CAPACITOR(M1F)
H4P LIGHT EMITTING DIODE
(DEFROST-ORANGE)
F1U FUSE(T,3.15A,250V)
HAP LIGHT EMITTING DIODE
H5P LIGHT EMITTING DIODE
(ELEMENT WASHING-RED)
(SERVICE MONITOR GREEN)
KPR MAGNETIC RELAY(M1P) H6P LIGHT EMITTING DIODE
(VENTILATION CLEAN-GREEN)
M1F MOTOR(INDOOR FAN)
M1S MOTOR(SWING FLAP) SS1 SELECTOR SWITCH(MAIN/SUB)
R1T THERMISTOR(AIR) SS2 SELECTOR SWITCH
(WIRELESS ADDRESS SET)
R2T·R3T THERMISTOR(COIL)
SS1 SELECTOR SWITCH(EMERGENCY) CONNECTOR FOR OPTIONAL PARTS
X15A CONNECTOR(FLOAT SWITCH)
V1R DIODE BRIDGE
X24A CONNECTOR
X1M TERMINAL BLOCK
(WIRELESS REMOTE CONTROLLER)
X2M TERMINAL BLOCK
X25A CONNECTOR(DRAIN PUMP)
Z1F NOISE FILTER
Z1C FERRITE CORE(NOISE FILTER) X33A CONNECTOR(ADAPTOR FOR WIRING)
PS POWER SUPPLY CIRCUIT X35A CONNECTOR
(GROUP CONTROL ADAPTOR)
RC SIGNAL RECEIVER CIRCUIT
TC SIGNAL TRANSMISSION CIRCUIT
WIRED REMOTE CONTROLLER
R1T THERMISTOR(AIR)
WIRELESS REMOTE CONTROLLER
(RECEIVER/DISPLAY UNIT)
A2P PRINTED CIRCUIT BOARD
A3P PRINTED CIRCUIT BOARD
BS1 PUSH BUTTON(ON/OFF)
H1P LIGHT EMITTING DIODE(ON-RED)
H2P LIGHT EMITTING DIODE
(TIMER-GREEN)
R1T R2T R3T
TO OUT DOOR
UNIT (NOTE 2)
H05VV-U4G2.5
(NOTE 7)
INDOOR UNIT GRN
t˚
t˚
t˚
A1P
X16A
X27A
NE V1R C105
X30A
X18A
X17A
1
BLK
+
F1U Z1F
_
PS
X24A
SS1
2
WHT
HAP NORM.EMG.
KPR
3
RED
(ONLY FHQG100~140CVEB)
X25A
(NOTE 4)
X2M
Z1C
N=4
X20A
RC
TC
NOTES
:CONNECTOR
:TERMINAL
:FIELD WIRING
1.
2. MODEL OUTDOOR UNIT SHOWN IN THIS DIAGRAM SHOWS THE
X33A
OUTLINE OF PRODUCT. FOR THE DETAIL, SEE WIRING DIAGRAM ATTACHED TO OUTDOOR UNIT.
3. IN CASE USING CENTRAL REMOTE CONTROLLER, CONNECT IT TO THE UNIT
IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL.
4. X15A, X25A ARE CONNECTED WHEN THE DRAIN UP KIT IS BEING USED.
IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL.
5. IN CASE OF MAIN/SUB CHANGEOVER,
SEE THE INSTALLATION MANUAL ATTACHED TO REMOTE CONTROLLER.
6. SYMBOLS SHOWS AS FOLLOWS: BLK:BLACK RED:RED BLU:BLUE WHT:WHITE
PNK:PINK YLW:YELLOW GRY:GRAY GRN:GREEN ORG:ORANGE BRN:BROWN.
7. SHOWS ONLY IN CASE OF PROTECTED PIPES. USE H07RN-F IN CASE OF NO PROTECTION.
X36A
X35A X15A
YLW
ORG
BLU
BLK
TRANSMISSION
WIRING
CENTRAL REMOTE
CONTROLLER (NOTE 3)
F2
F1
P2
P1
X1M
GRN
A2P
SS1
SS2
X2A
A3P
H1P
H2PBS1
H3P
H4P
H5P
H6P
P2
P1
R1T
WIRED REMOTE
CONTROLLER
(OPTIONAL ACCESSORY)
(NOTE 5)
X1A
X1A
WIRELESS REMOTE CONTROLLER
RED
(RECEIVER/DISPLAY UNIT)
(OPTIONAL ACCESSORY)
BLU
MS GRN/YLW
BRN
ORG 3~
WHT
M1F
(ONLY FHQG100~140CVEB)
MSW
M1S
(NOTE 4)
X25A
X24A
X15A
A1P
X1M
X33A
X2M
X35A CONTROL BOX
3D069266A
180
Appendix
SiBE281013
2.2
Wiring Diagrams
Outdoor Unit
2.2.1 RZQG71LV1B
TO INDOOR
UNIT
POWER SUPPLY
~220-240V 50Hz
X1M L N
N
L
X1M 1 2 3
BLK WHT RED
BLU
RED
LA
NA
E
Z1F
Z
2
F
F1U
RC
HAP
H1P H3P H5P H7P DS1
ON
NOTE)3
OFF
BS1 BS2 BS3 BS4
A1P
12
(BACK)
X205A
X1M
F6U
H1P~H7P
(FRONT)
EL.COMPO.BOX
NOTE)2
X5A
PS
R1
K11M
ORG LB
K10R
X6A
K1R
HAP
X25A
+
L1R
BRN LC
V2R
_
+
S1PH
+ C3
P<
V1T
_
+ C2
V3R
Y1S
X32A
POSITION OF
COMPRESSOR TERMINAL
V
Z1C
N=5
V
RED WHT BLU
M1F
R5T
R6T
t˚
t˚
t˚
t˚
t˚
t˚
t˚
X111A
X11A
Y1E
X12A
M
X13A
MS
3~
NOTES 1.
:
:
U
V W
MS
M1C 3~
W
R4T
X21A
W
X502A
U
R3T
X106A
V1R
U
A1P
R10T
R2T
F6U
R2_
+
R1T
:
:
:
2. REFER TO THE OPTIONAL MANUAL,
TERMINAL
FOR CONNECTION WIRING TO X6A.
TERMINAL BLOCK
3. THE POSITIONS OF THE SELECTOR SWITCHES
CONNECTOR
(DS1) INDICATE FACTORY SETTING.
RELAY CONNECTOR
REFER TO THE SERVICE MANUAL FOR DETAILS.
4. COLORS BLK:BLACK RED:RED BLU:BLUE WHT:WHITE
FIELD WIRING
YLW:YELLOW ORG:ORANGE GRY:GRAY GRN:GREEN
FUSE
FUSE( T ,3.15A, 250V)
PILOT LAMP(SERVICE MONITOR-ORANGE)
FLASHING LAMP
(SERVICE MONITOR-GREEN)
K11M
K1R
MAGNETIC CONTACTOR
MAGNETIC RELAY (Y1S)
K10R
L1R
M1C
M1F
MAGNETIC RELAY
REACTOR
MOTOR (COMPRESSOR)
MOTOR (FAN)
PS
SWITCHING POWER SUPPLY
R1
R2
R1T
R2T
R3T
RESISTOR
RESISTOR
THERMISTOR (AIR)
THERMISTOR (DISCHARGE)
THERMISTOR (SUCTION)
R4T
R6T
THERMISTOR (COIL)
THERMISTOR (COIL MIDDLE)
THERMISTOR (LIQUID)
R10T
RC
S1PH
THERMISTOR (FIN)
SIGNAL RECEIVER CIRCUIT
HIGH PRESSURE SWITCH
TC
V1R
V2R,V3R
SIGNAL TRANSMISSION CIRCUIT
IGBT POWER MODULE
V1T
X1M
Y1E
IGBT
TERMINAL BLOCK
ELECTRIC EXPANSION VALVE
SOLENOID VALVE (4 WAY VALVE)
R5T
+ C1
CAPACITOR
DIP SWITCH
FUSE( T ,6.3A, 250V)
HAP
Z1C
TC
Z3F
PRINTED CIRCUIT BOARD
PRINTED CIRCUIT BOARD
PUSH BUTTON SWITCH
DS1
F1U
F2U
H2P H4P H6P
Z2C
N=2
X803A
F2U
GRN
L1R
A2P
A2P
A1P
A2P
BS1~BS4
C1~C3
DIODE BRIDGE
Y1S
Z1C,Z2C
NOISE FILTER (FERRITE CORE)
Z1F~Z3F
NOISE FILTER
3D068608
2.2.2 RZQG100-140LV1B
POWER SUPPLY
~220-240V 50Hz
N
L
X1M L N
X1M 1 2 3
Z2C
N=3
Z4C
N=1
GRN/YLW Z3C
N=1
BLK WHT RED
A4P
RED
BLU GRN
E
LA
NA
X803A
E3
F1U Z
2
Z3F
F
X801AF3U
LF RED
X809A
Z1F
RC
TC
NF BLU
LB
NB
A3P
RED
BLU
LC
NC F4U
NOTE)2
X5A
X25A
HAP
+ C2 + C3
_
S1PH
P<
X32A
P ORG
V1T
V3R
+ C1
+
R2_
C4
N GRY
Y1S
R10T
R1T
t˚
t˚
R2T R3T R4T R5T R6T
t˚
t˚
t˚
t˚
t˚
F6U
V1R
U
+
+
_ V2R
+
X6A
K1R
K10R
X2A N=1WHT LE
A1P
X205A
PS
R1
K1M
Z5C
WHT LD
A2P
H2P H4P H6P
H1P H3P H5P H7P DS1
ON
NOTE)3
BS1 BS2BS3BS4 OFF 1 2
X9A
Z4F
L1R
A1P
PRINTED CIRCUIT BOARD
A2P
PRINTED CIRCUIT BOARD
A3P
PRINTED CIRCUIT BOARD
A4P
PRINTED CIRCUIT BOARD
BS1~BS4 PUSH BUTTON SWITCH
C1~C4
CAPACITOR
DS1
DIP SWITCH
F1U,F3U,F4U FUSE( T ,6.3A, 250V)
F6U
FUSE( T ,5.0A, 250V)
H1P~H7P PILOT LAMP(SERVICE MONITOR-ORANGE)
HAP
FLASHING LAMP
(SERVICE MONITOR-GREEN)
K1M
MAGNETIC CONTACTOR
K1R
MAGNETIC RELAY (Y1S)
MAGNETIC RELAY
K10R
L1R
REACTOR
M1C
MOTOR (COMPRESSOR)
MOTOR (FAN)(UPPER)
M1F
M2F
MOTOR (FAN)(LOWER)
PS
SWITCHING POWER SUPPLY
R1
RESISTOR
R2
RESISTOR
R1T
THERMISTOR (AIR)
R2T
THERMISTOR (DISCHARGE)
R3T
THERMISTOR (SUCTION)
R4T
THERMISTOR (COIL)
R5T
THERMISTOR (COIL MIDDLE)
R6T
THERMISTOR (LIQUID)
R10T
THERMISTOR (FIN)
RC
SIGNAL RECEIVER CIRCUIT
S1PH
HIGH PRESSURE SWITCH
TC
SIGNAL TRANSMISSION CIRCUIT
V1R
IGBT POWER MODULE
V2R,V3R DIODE BRIDGE
V1T
IGBT
X1M
TERMINAL BLOCK
Y1E
ELECTRIC EXPANSION VALVE
Y1S
SOLENOID VALVE (4 WAY VALVE)
Z1C~Z8C NOISE FILTER (FERRITE CORE)
Z1F~Z4F NOISE FILTER
TO INDOOR
UNIT
GRN
X106A
X111A
X107A
X11A
X12A
Z6C
N=1X21A
Y1E
M
X13A
V W
Z1C
N=6
POSITION OF
COMPRESSOR
RED WHT BLU
TERMINAL
X502A
W(C)
U V W
U(S)
MS
M1C 3~
V(R)
Z7C
N=1
M1F
MS
3~
NOTES 1.
MS
M2F 3~
: TERMINAL
: TERMINAL BLOCK
: CONNECTOR
: RELAY CONNECTOR
: FIELD WIRING
L1R
Z8C
N=1
A2P
2. REFER TO THE OPTIONAL MANUAL,
FOR CONNECTION WIRING TO X6A.
3. THE POSITIONS OF THE SELECTOR SWITCHES
(DS1) INDICATE FACTORY SETTING.
REFER TO THE SERVICE MANUAL FOR DETAILS.
4. COLORS BLK:BLACK RED:RED BLU:BLUE WHT:WHITE
YLW:YELLOW ORG:ORANGE GRY:GRAY GRN:GREEN
HAP
C4 A3P
A4P
A1P
(BACK)
X1M
(FRONT)
EL,COMPO,BOX
3D069265
Appendix
181
Precautions for New Refrigerant (R-410A)
SiBE281013
3. Precautions for New Refrigerant (R-410A)
3.1
Outline
3.1.1 About Refrigerant R-410A
„ Characteristics of new refrigerant, R-410A
1. Performance
Almost the same performance as R-22 and R-407C
2. Pressure
Working pressure is approx. 1.4 times more than R-22 and R-407C.
3. Refrigerant composition
Few problems in composition control, since it is a Quasi-azeotropic mixture refrigerant.
HFC units (Units using new refrigerants)
R-407C
R-410A
Refrigerant name
Composing
substances
Design pressure
Non-azeotropic mixture
of HFC32, HFC125 and
HFC134a (*1)
3.2 MPa (gauge pressure)
= 32.6 kgf/cm2
Quasi-azeotropic mixture
of HFC32 and HFC125
(*1)
4.0 MPa (gauge pressure)
= 40.8 kgf/cm2
HCFC units
R-22
Single-component
refrigerant
2.75MPa (gauge pressure)
= 28.0 kgf/cm2
Refrigerant oil
Ozone destruction
factor (ODP)
Synthetic oil (Ether)
Mineral oil (Suniso)
0
0
0.05
Combustibility
Toxicity
None
None
None
None
None
None
∗1. Non-azeotropic mixture refrigerant: mixture of 2 or more refrigerants having different boiling
points.
∗2. Quasi-azeotropic mixture refrigerant: mixture of 2 or more refrigerants having similar boiling
points.
∗3. The design pressure is different at each product. Please refer to the installation manual for
each product.
(Reference) 1 MPa
10.19716 kgf / cm2
Pressure-Enthalpy curves of HFC-32/125 (50/50wt%)
182
Appendix
SiBE281013
Precautions for New Refrigerant (R-410A)
„ Thermodynamic characteristic of R-410A
Temperature
(˚C)
Appendix
Steam pressure
(kPa)
Liquid
Vapor
Density
(kg/m3 )
Liquid
Vapor
Specific heat at constant
pressure (kJ/kgK)
Liquid
Vapor
Specific enthalpy
(kJ/kg)
Liquid
Vapor
DAIREP ver2.0
Specific entropy
(kJ/KgK)
Liquid
Vapor
183
Precautions for New Refrigerant (R-410A)
3.2
SiBE281013
Refrigerant Cylinders
„ Cylinder specifications
•
•
The cylinder is painted refrigerant color (pink).
The cylinder valve is equipped with a siphon tube.
Siphon tube
Cylinder
Refrigerant can be charged in liquid state with cylinder in
upright position.
Caution: Do not lay cylinder on its side during charging, since
it cause refrigerant in gas state to enter the system.
„ Handling of cylinders
(1) Laws and regulations
R-410A is liquefied gas, and the High Pressure Gas Safety Law must be observed in
handling them. Before using, refer to the High Pressure Gas Safety Law.
The Law stipulates standards and regulations that must be followed to prevent accidents
with high pressure gases. Be sure to follow the regulations.
(2) Handing of vessels
Since R-410A is high pressure gas, it is contained in high pressure vessels.
Although those vessels are durable and strong, careless handling can cause damage that
can lead to unexpected accidents. Do not drop vessels, let them fall, apply impact or roll
them on the ground.
(3) Storage
Although R-410A is not flammable, it must be stored in a well-ventilated, cool, and dark
place in the same way as any other high pressure gases.
It should also be noted that high pressure vessels are equipped with safety devices that
releases gas when the ambient temperature reaches more than a certain level (fusible plug
melts) and when the pressure exceeds a certain level (spring-type safety valve operates).
184
Appendix
SiBE281013
3.3
Precautions for New Refrigerant (R-410A)
Service Tools
R-410A is used under higher working pressure, compared to previous refrigerants
(R-22, R-407C). Furthermore, the refrigerating machine oil has been changed from Suniso oil to
Ether oil, and if oil mixing is occurred, sludge results in the refrigerants and causes other
problems. Therefore, gauge manifolds and charge hoses that are used with a previous
refrigerant (R-22, R-407C) can not be used for products that use new refrigerants.
Be sure to use dedicated tools and devices.
„ Tool compatibility
Compatibility
HFC
HCFC
Tool
R-410A
R-407C
Gauge manifold
Charge hose
• Do not use the same tools for R-22
and R-410A.
• Thread specification differs for
R-410A and R-407C.
✕
✕
{
Charging cylinder
Gas detector
{
✕
Vacuum pump
(pump with reverse flow
preventive function)
Weighting instrument
Reasons for change
R-22
{
• Weighting instrument used for HFCs.
• The same tool can be used for HFCs.
• To use existing pump for HFCs,
vacuum pump adaptor must be
installed.
{
✕
Charge mouthpiece
Flaring tool (Clutch type)
{
Torque wrench
Pipe cutter
{
{
Pipe expander
Pipe bender
{
{
Pipe assembling oil
✕
Refrigerant recovery
device
Check your recovery device.
Refrigerant piping
See the chart below.
• Seal material is different between
R-22 and HFCs.
• Thread specification is different
between R-410A and others.
• For R-410A, flare gauge is necessary.
• Torque-up for 1/2 and 5/8
• Due to refrigerating machine oil
change. (No Suniso oil can be used.)
• Only f19.1 is changed to 1/2H material
while the previous material is "O".
As for the charge mouthpiece and packing, 1/2UNF20 is necessary for mouthpiece size of
charge hose.
„ Copper tube material and thickness
Pipe size
φ6.4
φ9.5
φ12.7
φ15.9
φ19.1
Material
O
O
O
O
O
R-407C
Thickness
t (mm)
0.8
0.8
0.8
1.0
1.0
Material
O
O
O
O
1/2H
R-410A
Thickness
t (mm)
0.8
0.8
0.8
1.0
1.0
* O: Soft (Annealed)
H: Hard (Drawn)
Appendix
185
Precautions for New Refrigerant (R-410A)
SiBE281013
1. Flaring tool
Flare gauge
„ Specifications
• Dimension A
Unit:mm
Nominal size
A +0−0.4
Tube O.D.
Do
Class-2 (R-410A)
Class-1 (Conventional)
1/4
6.35
9.1
9.0
3/8
9.52
13.2
13.0
1/2
12.70
16.6
16.2
5/8
15.88
19.7
19.4
3/4
19.05
24.0
23.3
„ Differences
• Change of dimension A
Dimension A
For class-1: R-407C
For class-2: R-410A
Conventional flaring tools can be used when the work process is changed.
(change of work process)
Previously, a pipe extension margin of 0 to 0.5 mm was provided for flaring. For R-410A air
conditioners, perform pipe flaring with a pipe extension margin of 1.0 to 1.5 mm.
(For clutch type only)
Conventional tool with pipe extension margin adjustment can be used.
186
Appendix
SiBE281013
Precautions for New Refrigerant (R-410A)
2. Torque wrench
„ Specifications
• Dimension B
Unit:mm
Nominal size
Class-1
Class-2
Previous
1/2
5/8
24
27
26
29
24
27
No change in tightening torque
No change in pipes of other sizes
„ Differences
• Change of dimension B
Only 1/2", 5/8" are extended
For class-1: R-407C
For class-2: R-410A
Dimension B
3. Vacuum pump with check valve
Vacuum pump adaptor
Reverse flow preventive
vacuum adaptor
„ Specifications
• Discharge speed
50 l/min (50 Hz)
60 l/min (60 Hz)
• Suction port UNF7/16-20(1/4 Flare)
UNF1/2-20(5/16 Flare) with adaptor
z Maximum degree of vacuum
Select a vacuum pump which is able to keep
the vacuum degree of the system in excess of
–100.7 kPa (5 torr – 755 mmHg).
„ Differences
• Equipped with function to prevent reverse oil flow
• Previous vacuum pump can be used by installing adaptor.
Appendix
187
Precautions for New Refrigerant (R-410A)
SiBE281013
4. Leak tester
„ Specifications
• Hydrogen detecting type, etc.
• Applicable refrigerants
R-410A, R-407C, R-404A, R-507A, R-134a, etc.
„ Differences
• Previous testers detected chlorine. Since HFCs do not contain chlorine, new tester detects
hydrogen.
5. Refrigerant oil (Air compal)
„ Specifications
• Contains synthetic oil, therefore it can be used for piping work of every refrigerant cycle.
• Offers high rust resistance and stability over long period of time.
„ Differences
• Can be used for R-410A and R-22 units.
6. Gauge manifold for R-410A
„ Specifications
• High pressure gauge
- 0.1 to 5.3 MPa (-76 cmHg to 53 kg/cm2)
• Low pressure gauge
- 0.1 to 3.8 MPa (-76 cmHg to 38 kg/cm2)
• 1/4" → 5/16" (2 min → 2.5 min)
• No oil is used in pressure test of gauges.
→ For prevention of contamination
188
Appendix
SiBE281013
Precautions for New Refrigerant (R-410A)
•
Temperature scale indicates the relationship between pressure and temperature in gas
saturated state.
„ Differences
• Change in pressure
• Change in service port diameter
7. Charge hose for R-410A
(Hose with ball valve)
„
•
•
•
Specifications
Working pressure 5.08 MPa (51.8 kg/cm2)
Rupture pressure 25.4 MPa (259 kg/cm2)
Available with and without hand-operate valve that prevents refrigerant from outflow.
„
•
•
•
Differences
Pressure proof hose
Change in service port diameter
Use of nylon coated material for HFC resistance
8. Charging cylinder
Can not be used
„ Specifications
• Use weigher for refrigerant charge listed below to charge directly from refrigerant cylinder.
„ Differences
• The cylinder can not be used for mixed refrigerant since mixing ratio is changed during
charging.
When R-410A is charged in liquid state using charging cylinder, foaming phenomenon is
generated inside charging cylinder.
Appendix
189
Precautions for New Refrigerant (R-410A)
SiBE281013
9. Weigher for refrigerant charge
„ Specifications
• High accuracy
TA101A (for 10-kg cylinder) = ± 2g
TA101B (for 20-kg cylinder) = ± 5g
• Equipped with pressure-resistant sight glass to check liquid refrigerant charging.
• A manifold with separate ports for HFCs and previous refrigerants is equipped as standard
accessories.
„ Differences
• Measurement is based on weight to prevent change of mixing ratio during charging.
10.Charge mouthpiece
„ Specifications
• For R-410A, 1/4"→ 5/16" (2 min → 2.5 min)
• Material is changed from CR to H-NBR.
„ Differences
• Change of thread specification on hose connection side (For the R-410A use)
• Change of sealer material for the HFCs use.
190
Appendix
Warning
z Daikin Industries, Ltd.’s products are manufactured for export to numerous countries throughout the
world. Daikin Industries, Ltd. does not have control over which products are exported to and used in
a particular country. Prior to purchase, please therefore confirm with your local authorised importer,
distributor and/or retailer whether this product conforms to the applicable standards, and is suitable
for use, in the region where the product will be used. This statement does not purport to exclude,
restrict or modify the application of any local legislation.
z Ask a qualified installer or contractor to install this product. Do not try to install the product yourself.
Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion.
z Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or
contractor to install those parts and accessories. Use of unauthorised parts and accessories or
improper installation of parts and accessories can result in water or refrigerant leakage, electrical
shock, fire or explosion.
z Read the User's Manual carefully before using this product. The User's Manual provides important
safety instructions and warnings. Be sure to follow these instructions and warnings.
If you have any enquiries, please contact your local importer, distributor and/or retailer.
Cautions on product corrosion
1. Air conditioners should not be installed in areas where corrosive gases, such as acid gas or alkaline gas, are produced.
2. If the outdoor unit is to be installed close to the sea shore, direct exposure to the sea breeze should be avoided. If you need to install
the outdoor unit close to the sea shore, contact your local distributor.
Organization:
DAIKIN INDUSTRIES, LTD.
AIR CONDITIONING MANUFACTURING DIVISION
JMI-0107
Scope of Registration:
THE DESIGN/DEVELOPMENT AND MANUFACTURE OF
COMMERCIAL AIR CONDITIONING, HEATING, COOLING,
REFRIGERATING EQUIPMENT, COMMERCIAL HEATING
EQUIPMENT, RESIDENTIAL AIR CONDITIONING
EQUIPMENT, HEAT RECLAIM VENTILATION, AIR
CLEANING EQUIPMENT, MARINE TYPE CONTAINER
REFRIGERATION UNITS, COMPRESSORS AND VALVES.
Organization:
DAIKIN INDUSTRIES
(THAILAND) LTD.
JQA-1452
All of the Daikin Group’s business
facilities and subsidiaries in Japan
are certified under the ISO 14001
international standard for
environment management.
Scope of Registration:
THE DESIGN/DEVELOPMENT
AND MANUFACTURE OF AIR
CONDITIONERS AND THE
COMPONENTS INCLUDING
COMPRESSORS USED FOR THEM
Dealer
Head Office:
Umeda Center Bldg., 2-4-12, Nakazaki-Nishi,
Kita-ku, Osaka, 530-8323 Japan
Tokyo Office:
JR Shinagawa East Bldg., 2-18-1, Konan,
Minato-ku, Tokyo, 108-0075 Japan
http://www.daikin.com/global_ac/
c All rights reserved
zSpecifications, designs and other content appearing in this brochure are current as of November 2010 but subject to change without notice.
SiBE281013
Printed in Japan 11/2010 AK
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