SPLIT-TYPE, AIR TO WATER HEAT PUMP
August 2015
SERVICE MANUAL
Outdoor unit
[Model Name]
PUHZ-SW160YKA
PUHZ-SW200YKA
Salt proof model
PUHZ-SW160YKA-BS
PUHZ-SW200YKA-BS
No. OCH583
R410A
REVISED EDITION-A
[Service Ref.]
PUHZ-SW160YKA.UK
PUHZ-SW160YKAR1.UK
PUHZ-SW200YKA.UK
PUHZ-SW200YKAR1.UK
PUHZ-SW160YKA-BS.UK
PUHZ-SW160YKAR1-BS.UK
Revision:
• PUHZ-SW160YKAR1.UK,
PUHZ-SW160YKAR1-BS.UK,
PUHZ-SW200YKAR1.UK and
PUHZ-SW200YKAR1-BS.UK
in REVISED EDITION-A.
•Some descriptions have been
modified.
• Please void OCH583.
Note:
• This manual describes service
data of the indoor units only.
PUHZ-SW200YKA-BS.UK
PUHZ-SW200YKAR1-BS.UK
CONTENTS
TECHNICAL CHANGES······························· 2
1. REFERENCE MANUAL····························· 2
2. SAFETY PRECAUTION····························· 2
3. FEATURES············································· 6
4. SPECIFICATIONS···································· 7
5. DATA····················································· 8
6. OUTLINES AND DIMENSIONS················· 11
7. WIRING DIAGRAM································· 12
8. WIRING SPECIFICATIONS······················ 13
9. REFRIGERANT SYSTEM DIAGRAM············ 15
10. TROUBLESHOOTING····························· 17
11. DISASSEMBLY PROCEDURE·················· 60
PARTS CATALOG (OCB583)
TECHNICAL CHANGES
Service ref. have been changed as follows.
PUHZ-SW160YKA(-BS).UK
PUHZ-SW200YKA(-BS).UK
PUHZ-SW160YKAR1(-BS).UK
PUHZ-SW200YKAR1(-BS).UK
1. A compliance with ErP directive Lot1 has been authorized.
1
REFERENCE MANUAL
INDOOR UNIT SERVICE MANUAL
Service
Manual No.
Model Name
Service Ref.
ERSE-YM9EC
ERSE-MEC
EHSE-YM9EC
EHSE-MEC
ERSE-YM9EC.UK
ERSE-YM9ECR1.UK
ERSE-MEC.UK
ERSE-MECR1.UK
EHSE-YM9EC.UK
EHSE-YM9ECR1.UK
EHSE-MEC.UK
EHSE-MECR1.UK
OCH590
OCB590
PAC-IF012B-E
PAC-IF021B-E
PAC-IF032B-E
PAC-IF012B-E
PAC-IF021B-E
PAC-IF032B-E
OCB427
PAC-SIF051B-E
PAC-SIF051B-E
OCB536
PAC-IF061B-E
PAC-IF062B-E
PAC-IF063B-E
PAC-IF061B-E
PAC-IF062B-E
PAC-IF063B-E
OCB572
2
SAFETY PRECAUTION
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
2-2. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilizing refrigerant R410A
Preparation before the repair service.
Precautions during the repair service.
• Prepare the proper tools.
• Prepare the proper protectors.
• Provide adequate ventilation.
• After stopping the operation of the air conditioner, turn off
the power-supply beaker.
• Discharge the condenser before the work involving the
electric parts.
• Do not perform the work involving the electric parts
with wet hands.
• Do not pour water into the electric parts.
• Do not touch the refrigerant.
• Do not touch the hot or cold areas in the refrigerating cycle.
• When the repair or the inspection of the circuit needs to be
done without turning off the power, exercise great caution
not to touch the live parts.
OCH583A
2
Use a vacuum pump with a reverse flow check
valve.
Use new refrigerant pipes.
In case of using the existing pipes for R22, be careful with
the following:
· Be sure to clean the pipes and make sure that the insides
of the pipes are clean.
· Change flare nut to the one provided with this product.
Use a newly flared pipe.
· Avoid using thin pipes.
Vacuum pump oil may flow back into refrigerant cycle and
that can cause deterioration of refrigerant oil, etc.
Use the following tools specifically designed for
use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Make sure that the inside and outside of refrigerant piping is clean and it has no contaminants
such as sulfur, oxides, dirt, shaving particles, etc,
which are hazard to refrigerant cycle.
In addition, use pipes with specified thickness.
Gauge manifold
Charge hose
Gas leak detector
Torque wrench
Contamination inside refrigerant piping can cause deterioration of refrigerant oil, etc.
Tools for R410A
Flare tool
Size adjustment gauge
Vacuum pump adaptor
Electronic refrigerant
charging scale
Handle tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of compressor.
Store the piping indoors, and both ends of the
piping sealed until just before brazing.
(Leave elbow joints, etc. in their packaging.)
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of compressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.
The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
Use the specified refrigerant only.
If large amount of mineral oil enters, that can cause deterioration of refrigerant oil, etc.
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the
unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the
spec labels provided with our products.
We will not be held responsible for mechanical failure,
system malfunction, unit breakdown or accidents caused
by failure to follow the instructions.
Charge refrigerant from liquid phase of gas
cylinder.
If the refrigerant is charged from gas phase, composition change
may occur in refrigerant and the efficiency will be lowered.
Do not use refrigerant other than R410A.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
If other refrigerant (R22, etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil, etc.
[1] Cautions for service
(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) When performing service, install a filter drier simultaneously.
Be sure to use a filter drier for new refrigerant.
[2] Additional refrigerant charge
When charging directly from cylinder
· Check that cylinder for R410A on the market is a syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Unit
Gravimeter
OCH583A
3
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No.
1
Tool name
Gauge manifold
Specifications
· Only for R410A
· Use the existing fitting specifications. (UNF1/2)
· Use high-tension side pressure of 5.3MPa·G or over.
2
Charge hose
· Only for R410A
3
Electronic scale
4
Gas leak detector
· Use the detector for R134a, R407C or R410A.
5
Adaptor for reverse flow check
· Attach on vacuum pump.
6
Refrigerant charge base
7
Refrigerant cylinder
· Use pressure performance of 5.09MPa·G or over.
—
—
· Only for R410A
· Top of cylinder (Pink)
· Cylinder with syphon
8
Refrigerant recovery equipment
—
2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES
(1) Flowchart
• Refer to the flowchart below to determine if the existing pipes can be used and if it is necessary to use a filter drier.
• If the diameter of the existing pipes is different from the specified diameter, refer to technological data materials to confirm if
the pipes can be used.
The existing pipe thickness meets specifications and the pipes are not damaged.
Measure the existing pipe thickness and
check for damage.
The existing pipe thickness does not meet
specifications or the pipes are damaged.
Check if the existing air conditioner can operate.
After operating the cooling system for about 30
minutes, do a pump down work.
• If the existing air conditioner cannot operate, use a
refrigerant recovery device to collect the refrigerant.
Disconnect the existing air conditioner from the
pipes.
•In case existing pipes were used for gas or oil
heat pump systems, be sure to clean the pipes.
Attach the new air conditioner
Perform the airtight test, vacuum air purging,
additional refrigerant charging (if necessary),
and gas leak check.
The existing pipes cannot be reused.
Use new pipes.
(2) Cautions for refrigerant piping work
New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same
as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working
pressure of R410A is 1.6 times higher than that of R22, their sizes of flared sections and flare nuts are different.
1 Thickness of pipes
Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness
shown below. (Never use pipes of 0.7 mm or below.)
Diagram below: Piping diameter and thickness
Thickness (mm)
Nominal
Outside
dimensions (in) diameter (mm)
R410A
R22
0.8
0.8
6.35
1/4
0.8
0.8
9.52
3/8
0.8
0.8
12.70
1/2
1.0
1.0
15.88
5/8
—
1.0
19.05
3/4
OCH583A
4
2 Dimensions of flare cutting and flare nut
The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that,
R410A is a refrigerant, which has higher risk of leakage because its working pressure is higher than that of other refrigerants. Therefore, to enhance airtightness and strength, flare cutting dimension of copper pipe for R410A has been specified separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also
has partly been changed to increase strength as shown below. Set copper pipe correctly referring to copper pipe flaring
dimensions for R410A below. For 1/2 and 5/8 inch pipes, the dimension B changes.
Use torque wrench corresponding to each dimension.
Dimension A
Dimension B
Flare cutting dimensions
Nominal
Outside
dimensions (in) diameter (mm)
6.35
1/4
9.52
3/8
12.70
1/2
15.88
5/8
19.05
3/4
Dimension A ( +0
-0.4 ) (mm)
R410A
R22
9.0
9.1
13.0
13.2
16.2
16.6
19.4
19.7
—
23.3
Flare nut dimensions
Nominal
Outside
dimensions (in) diameter (mm)
6.35
1/4
9.52
3/8
12.70
1/2
15.88
5/8
19.05
3/4
Dimension B
R410A
17.0
22.0
26.0
29.0*
—
(mm)
R22
17.0
22.0
24.0
27.0
36.0
3 Tools for R410A (The following table shows whether conventional tools can be used or not.)
R410A tools
Can R22 tools be used? Can R407C tools be used?
Tool exclusive for R410A
Tool exclusive for R410A
Tool for HFC refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Ester oil and alkylbenzene
Ester oil:
Alkylbenzene oil: minimum amount
oil (minimum amount)
Prevent compressor malfunction Tool exclusive for R410A
Safety charger
when charging refrigerant by
spraying liquid refrigerant
Prevent gas from blowing out Tool exclusive for R410A
Charge valve
when detaching charge hose
Vacuum drying and air
Tools for other refrigerants can
Vacuum pump
(Usable if equipped
(Usable if equipped
with adapter for reverwith adapter for reverpurge
be used if equipped with adapse flow)
se flow)
ter for reverse flow check
Flaring work of piping
Tools for other refrigerants
Flare tool
(Usable by adjusting
(Usable by adjusting
can be used by adjusting
flaring dimension)
flaring dimension)
flaring dimension
Bend the pipes
Tools for other refrigerants can be used
Bender
Tools for other refrigerants can be used
Cut the pipes
Pipe cutter
Tools for other refrigerants can be used
Welder and nitrogen gas cylinder Weld the pipes
Tools for other refrigerants can be used
Refrigerant charging scale Refrigerant charge
Vacuum gauge or thermis- Check the degree of vacuum. (Vacuum Tools for other refrigerants
valve prevents back flow of oil and refri- can be used
tor vacuum gauge and
gerant to thermistor vacuum gauge)
vacuum valve
Refrigerant charge
Charging cylinder
Tool exclusive for R410A
: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)
: Tools for other refrigerants can be used under certain conditions.
: Tools for other refrigerants can be used.
Tools and materials
Gauge manifold
Charge hose
Gas leak detector
Refrigerant recovery equipment
Refrigerant cylinder
Applied oil
Use
Air purge, refrigerant charge
and operation check
Gas leak check
Refrigerant recovery
Refrigerant charge
Apply to flared section
2-4. PRECAUTIONS FOR SALT PROOF TYPE "-BS" MODEL
Although "-BS" model has been designed to be resistant to salt damage, observe the following precautions to maintain the performance of the unit.
1. Avoid installing the unit in a location where it will be exposed directly to seawater or sea breeze.
2. If the cover panel may become covered with salt, be sure to install the unit in a location where the salt will be washed away
by rainwater. (If a sunshade is installed, rainwater may not clean the panel.)
3. To ensure that water does not collect in the base of the outdoor unit, make sure that the base is level, not at angle. Water
collecting in the base of the outdoor unit could cause rust.
4. If the unit is installed in a coastal area, clean the unit with water regularly to remove any salt build-up.
5. If the unit is damaged during installation or maintenance, be sure to repair it.
6. Be sure to check the condition of the unit regularly.
7. Be sure to install the unit in a location with good drainage.
OCH583A
5
3
FEATURES
PUHZ-SW160YKA
PUHZ-SW200YKA
PUHZ-SW160YKA-BS
PUHZ-SW200YKA-BS
CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT
Maximum 30 m
The refrigerant circuit with LEV (Linear Expansion Valve) and power receiver/ accumulator always control the optimal refrigerant level regardless of the length (30 m maximum and 5 m minimum) of piping. The additional refrigerant charging work
during installation often causes problems. It is completely eliminated by chargeless system. This unique system improves
the quality and reliability of the work done. It also helps to speed up the installation time.
OCH583A
6
4
SPECIFICATIONS
Service Ref.
OUTDOOR UNIT
Power supply (phase, cycle, voltage)
Max. current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Crankcase heater
Heat exchanger
Fan
Fan (drive) o No.
Fan motor output
Airflow
Defrost method
Noise level (SPL)
REFRIGERANT PIPING
Dimensions
Weight
Refrigerant
Charge
Oil (Model)
Pipe size O.D.
Connection method
Between the indoor &
outdoor unit
OCH583A
A
kW
W
kW
K/min(CFM)
Cooling
Heating
W
D
H
dB
dB
mm (in)
mm (in)
mm (in)
kg (lb)
kg (lb)
L
mm (in)
mm (in)
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
PUHZ-SW160YKA(-BS).UK
PUHZ-SW200YKA(-BS).UK
PUHZ-SW200YKAR1(-BS).UK
PUHZ-SW160YKAR1(-BS).UK
3 phase 50Hz, 400V
21
19
Munsell 3Y 7.8/1.1
Linear Expansion Valve
Hermetic
ANB52FRNMT
4.7
4.7
Inverter
HP switch
Comp. surface thermo
HP sensor
—
Plate fin coil
Propeller fan o 2
0.200 + 0.200
140 (4,940)
Reverse cycle
58
60
62
62
1,050 (41-5/16)
330 + 40 (13+1-9/16)
1,338 (52-11/16)
136 (299.88)
R410A
7.7 (17.0)
7.1 (15.7)
2.30 (FVC68D)
12.7 (1/2)
9.52 (3/8)
25.4 (1)
25.4 (1)
Flared
Flared & Brazing
Maximum 30 m
2 to 80 m
7
5
DATA
5-1. ADJUSTING THE AMOUNT OF REFRIGERANT
Permitted
pipe length
Service Ref.
PUHZ-SW160YKA.UK
PUHZ-SW160YKA-BS.UK
PUHZ-SW160YKAR1.UK
PUHZ-SW160YKAR1-BS.UK
PUHZ-SW200YKA.UK
PUHZ-SW200YKA-BS.UK
PUHZ-SW200YKAR1.UK
PUHZ-SW200YKAR1-BS.UK
Amount of additional refrigerant charge (kg)
Initial charge
(kg)
30 m and less
31–40 m and less 41–50 m and less 51–60 m and less 61–70 m and less
0.9 kg
7.1
1.8 kg
2.7 kg
3.6 kg
The additional charge
amount is obtained by
the following formula.
No additional
charge necessary
80 m or less
7.7
1.2 kg
3.6 kg
2.4 kg
71–80 m and less
4.8 kg
Calculate the additional charge amount based on the following procedure.
If the calculation results in an amount that is smaller than the "Additional charge amount for 70 m," perform the additional charge using the amount shown
in "Additional charge amount for 70 m."
Amount of additional
charge [kg]
Main piping:
= Liquid line size
[12.7 over all length [m]
o 0.11 [kg/m]
Additional charge amount SW160
for 70 m
SW200
+
Main piping:
Liquid line size
[9.52 overall length [m]
o 0.09 [kg/m]
+
Branch piping: Liquid
line size
[9.52 overall length [m]
o 0.06 [kg/m]
3.6 kg
4.8 kg
5-2. COMPRESSOR TECHNICAL DATA
(at 20°C)
Service Ref.
PUHZ-SW160/200YKA.UK
PUHZ-SW160/200YKA-BS.UK
PUHZ-SW160/200YKAR1.UK
PUHZ-SW160/200YKAR1-BS.UK
Compressor model
ANB52FRNMT
Winding
Resistance
(")
U-V
0.30
U-W
0.30
W-V
0.30
OCH583A
8
+
Branch piping: Liquid
line size
[6.35 overall length [m]
o 0.02 [kg/m]
–
3.6 (kg)
5-3. NOISE CRITERION CURVES
MICROPHONE
1m
UNIT
1.5 m
GROUND
MODE SPL(dB)
COOLING
58
HEATING
62
PUHZ-SW200YKA.UK
PUHZ-SW200YKA-BS.UK
PUHZ-SW200YKAR1.UK
PUHZ-SW200YKAR1-BS.UK
LINE
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
125
NC-20
250
500
1000
2000
4000
8000
BAND CENTER FREQUENCIES, Hz
OCH583A
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
PUHZ-SW160YKA.UK
PUHZ-SW160YKA-BS.UK
PUHZ-SW160YKAR1.UK
PUHZ-SW160YKAR1-BS.UK
MODE SPL(dB)
COOLING
60
HEATING
62
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
125
NC-20
250
500
1000
2000
4000
BAND CENTER FREQUENCIES, Hz
9
LINE
8000
5-4. <REFERENCE DATA> PLATE HEAT EXCHANGER (ACH70-74 PLATES)
PUHZ-SW200YKA(-BS).UK
PUHZ-SW200YKAR1(-BS).UK
PUHZ-SW160YKA(-BS).UK
PUHZ-SW160YKAR1(-BS).UK
Nominal water flow
Heating
(A7/W35)
Capacity
L/min
63.1
Nominal water flow
kW
22.0
Heating
(A7/W35)
COP
Heating
(A7/W45)
4.20
Power input
kW
5.238
Capacity
kW
22.0
COP
Power input
Heating
(A2/W35)
Capacity
3.20
kW
kW
COP
Heating
(A2/W45)
kW
5.144
Capacity
kW
16.0
Nominal water flow
Capacity
2.36
Power input
Capacity
Heating
(A2/W45)
Capacity
kW
25.0
COP
kW
8.064
Capacity
kW
20.0
Power input
kW
7.142
Capacity
kW
20.0
COP
16.0
Cooling
(A35/W7)
kW
18.0
4.56
kW
Cooling
(A35/W18)
Capacity
OCH583A
+ 7°C
+ 6°C
+ 30°C/+ 35°C
+ 7°C
+ 6°C
+ 40°C/+ 45°C
+ 2°C
+ 1°C
+ 30°C/+ 35°C
+ 2°C
+ 1°C
+ 40°C/+ 45°C
+ 35°C
+ 24°C
+ 12°C/+ 7°C
+ 35°C
+ 24°C
+ 23°C/+ 18°C
10
kW
9.090
L/min
57.3
kW
20.0
2.25
Power input
kW
8.888
Capacity
kW
22.0
kW
5.365
EER
Note: "COP" and "Power input" in the above table do NOT contain the "pump input (based on EN 14511)".
Rating conditions
Nominal operating condition
Heating (A7/W35)
Outside air temperature (Dry-bulb)
Outside air temperature (Wet-bulb)
Water temperature (inlet/outlet)
Heating (A7/W45)
Outside air temperature (Dry-bulb)
Outside air temperature (Wet-bulb)
Water temperature (inlet/outlet)
Heating (A2/W35)
Outside air temperature (Dry-bulb)
Outside air temperature (Wet-bulb)
Water temperature (inlet/outlet)
Heating (A2/W45)
Outside air temperature (Dry-bulb)
Outside air temperature (Wet-bulb)
Water temperature (inlet/outlet)
Cooling (A35/W7)
Outside air temperature (Dry-bulb)
Outside air temperature (Wet-bulb)
Water temperature (inlet/outlet)
Cooling (A35/W18)
Outside air temperature (Dry-bulb)
Outside air temperature (Wet-bulb)
Water temperature (inlet/outlet)
2.20
EER
Power input
3.950
2.80
COP
Power input
5.800
3.10
Power input
Nominal water flow
kW
4.00
6.250
45.9
2.76
25.0
kW
L/min
kW
kW
Power input
6.779
EER
Power input
Heating
(A2/W35)
71.7
COP
kW
EER
Cooling
(A35/W18)
16.0
Power input
Power input
Cooling
(A35/W7)
6.875
3.11
COP
Heating
(A7/W45)
Capacity
L/min
4.10
6
OUTLINES AND DIMENSIONS
PUHZ-SW160YKA.UK
PUHZ-SW160YKA-BS.UK
PUHZ-SW200YKA.UK
PUHZ-SW200YKA-BS.UK
PUHZ-SW160YKA.UKPUHZ-SW200YKA.UK
PUHZ-SW160YKA-BS.UKPUHZ-SW200YKA-BS.UK
PUHZ-SW160YKAR1.UKPUHZ-SW200YKAR1.UK
PUHZ-SW160YKAR1-BS.UKPUHZ-SW200YKAR1-BS.UK
OCH583A
11
Unit: mm
7
WIRING DIAGRAM
PUHZ-SW160YKA.UKPUHZ-SW200YKA.UK
PUHZ-SW160YKA-BS.UKPUHZ-SW200YKA-BS.UK
PUHZ-SW160YKAR1.UKPUHZ-SW200YKAR1.UK
PUHZ-SW160YKAR1-BS.UKPUHZ-SW200YKAR1-BS.UK
NAME
Terminal Block <Power Supply>
Terminal Block <Indoor/Outdoor>
Motor for Compressor
Fan Motor
Solenoid Valve (Four-Way Valve)
High Pressure Switch
High Pressure Sensor
Thermistor <Liquid>
Thermistor <2-Phase Pipe>
Thermistor <Ambient>
Thermistor <Heat Sink>
Thermistor <Comp. Surface>
Linear Expansion Valve
Reactor
Reactor
Rush Current Protect Resistor
Fuse <T15AL250V>
SYMBOL
CY1, CY2
P.B.
TB-U/V/W
TB-L1/L2/L3
TB-P1/P3
X52CA/B
N.F.
LI1/LI2/LI3/NI
LO1/LO2/LO3
GD1, GD2
C.B.
NAME
Capacitor
Power Circuit Board
Connection Terminal <U/V/W-Phase>
Connection Terminal <L1/L2/L3-Power Supply>
Connection Terminal
52C Relay
Noise Filter Circuit Board
Connection Terminal <L1/L2/L3/N-Power Supply>
Connection Terminal <L1/L2/L3-Power Supply>
Connection Terminal <Ground>
Controller Circuit Board
Switch <Manual Defrost, Defect History,
Record Reset, Refrigerant Address>
Switch <Test Operation>
Switch <Function Switch, Model Select>
Switch <Model Select>
Switch <Function Switch>
SW1
SW4
SW5
SW6
SW7
63H
1
3
7
F3
21S4 1
(GRN)
F4
4
SW7
SW5
SW9
SW6
CN31
CN3S 1 3
(WHT)
2
CNAC
(WHT)
1 2
CNS
(WHT)
3
14
CNM
(WHT)
CN4
(WHT)
1 2
CN2
1 (RED) 7
TRANS
1
*1
SW1
1 3
63H
(YLW)
3
CNDC
(PNK)
*1
1
5
LEV-A
(WHT)
CNF2
(WHT)
1
2
1 3
63HS
(WHT)
4 1 2
1 2 1
TH32 TH7/6
TH3
(BLK) (RED) (WHT)
CNDM 1 3
(WHT)
3
1
CN51 1
(WHT)
X51
7
M
X54
1
NAME
Switch <Function Switch>
Switch <Function Switch>
Switch <Pump Down>
Connector <Emergency Operation>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
Connector <Connection for Option>
LED <Operation Inspection Indicators>
Fuse <T6.3AL250V>
Relay
t°
SW4 SWP SW8
CNF1
7 (WHT)
1
t° t°
t°
LED2
MF2
MS
3~
C. B.
X52
MF1
MS
3~
SYMBOL
SW8
SW9
SWP
CN31
CN3S
CNDM
CN51
SV1
SS
CNM
LED1, LED2
F3, F4
X51, X52, X54
LEV-A
63HS
TH32 TH7 TH6 TH3
LED1
SYMBOL
TB1
TB2
MC
MF1, MF2
21S4
63H
63HS
TH3
TH6
TH7
TH8
TH32
LEV-A
ACL4
DCL
RS
FUSE1, FUSE2
3 SV1
(GRY)
1
5
3 SS
(WHT)
*1. MODEL SELECT
The black square (■) indicates a switch position.
MODEL
SW6
SW5-6 *2
RED FUSE2 RED
WHT FUSE1 WHT
21S4
TH8
P.B.
ON
160Y OFF
7
2
2
ON
200Y OFF
t°
1 2
CN6
(WHT)
1 2
CN5
(RED)
BLK
1
CN2
(RED)
7 1 2
CN4
(WHT)
L3OUT
BLK
TB-L3
S3
RS
TB-P3
V W
U MS
3~
TB-P1
TB-U
TB-V
TB-W
RED
WHT
BLK
YLW
ORN
S2
TB-L2
L3IN
INDOOR
UNIT
BRN
S1
RED
RED
X52CA TB-L1
CY1
CY2
TB2
RED
DCL
MC
2
TB1
L1
POWER
SUPPLY
3N ~
400V 50Hz
L2
L3
CNCT
(RED) 1 2 1
3
CNAC2
3 (RED)
LO1
RED
RED
LI1
WHT
LI2
LO2
WHT
BLK
LI3
LO3
BLK
BLU
NI
GRN/YLW
N
CNAC1
(WHT) 1
OCH583A
2
12
3
3
WHT
WHT
CNDC 1
(PNK)
GD2
BLK
N.F.
BLK
GD1
1 2 3 4 5 6 7 8
*2. SW5-1 to 5: Function switch
X52CB
WHT
1 2 3 4 5 6 7 8
1 CNL
(BLU)
ACL4
ON
OFF
ON
OFF
1 2 3 4 5 6
1 2 3 4 5 6
8
WIRING SPECIFICATIONS
8-1. FIELD ELECTRICAL WIRING (power wiring specifications)
Circuit rating
Wiring
Wire No. ×
size (mm²)
Outdoor unit model
Outdoor unit power supply
Outdoor unit input capacity main switch (Breaker) *1
Outdoor unit power supply
Indoor unit-Outdoor unit
*2
Indoor unit-Outdoor unit earth
Remote controller-Indoor unit
Outdoor unit L-N (single)
Outdoor unit L1-N, L2-N, L3-N (3 phase)
Indoor unit-Outdoor unit S1-S2
Indoor unit-Outdoor unit S2-S3
Remote controller-Indoor unit
*2
*3
SW160/200
3N~ (3 ph 4-wires), 50 Hz, 400 V
32 A
5 × Min. 4
Cable length 50m: 3×4 (Polar)/
Cable length 80m: 3×6 (Polar)
1 × Min. 2.5
2 × 0.3 (Non-polar)
*4
230 V AC
*4
*4
*4
230 V AC
24 V DC
12 V DC
*1.A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
Make sure that the current leakage breaker is one compatible with higher harmonics.
Always use a current leakage breaker that is compatible with higher harmonics as this unit is equipped with an inverter.
The use of an inadequate breaker can cause the incorrect operation of inverter.
*2.Maximum 80 m. Total maximum including all indoor/indoor connection is 80 m.
• Use one cable for S1 and S2, and another for S3 as shown in the picture.
*3.The 10 m wire is attached in the remote controller accessory.
*4.The figures are NOT always against the ground.
S3 terminal has 24 V DC against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulated by the transformer or other device.
Caution: Be sure to install N-Line. Without N-Line, it could cause damage to the unit.
Notes: 1. Wiring size must comply with the applicable local and national codes.
2. Power supply cables and the cables between indoor and outdoor unit shall not be lighter than polychloroprene sheathed flexible cables. (Design
60245 IEC 57)
3. Be sure to connect the cables between indoor and outdoor unit directly to the units (no intermediate connections are allowed).
Intermediate connections may result in communication errors. If water enters at the intermediate connection point, it may cause insufficient
insulation to ground or a poor electrical contact .
Notes: 1.(IfWiring
size must comply
with is
the
applicablebe
local
and
code.. to prevent water from entering the cables.)
an intermediate
connection
necessary,
sure
to national
take measures
Power
4. 2.Install
ansupply
earth cables
longer and
thanIndoor/Outdoor
other cables. unit connecting cables shall not be lighter than polychloroprene sheathed flexible cable.
(Design
60245 IEC
57)
5. Do
not construct
a system
with a power supply that is turned ON and OFF frequently.
3. Install an earth longer than other cables.
Power supply
Isolator
3 poles isolator
S1
S1
A-Control S2
Outdoor Unit
S2
S3
S3
Indoor Unit
Warning:
In case of A-control wiring, there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between
power line and communication signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, S3 terminals
when the power is energized. If isolator should be used between indoor unit and outdoor unit, please use 3-pole type.
OCH583A
13
8-2. INDOOR – OUTDOOR CONNECTING CABLE
The cable shall not be lighter than design 60245 IEC or 60227 IEC.
Wire No. o Size (mm²)
Outdoor power supply
Indoor unit-Outdoor unit
Indoor unit-Outdoor unit earth
Max. 45 m
Max. 50 m
Max. 80 m
3 o 1.5 (polar)
3 o 2.5 (polar)
3 o 2.5 (polar) and S3 separated
1 o Min. 1.5
1 o Min. 2.5
1 o Min. 2.5
Note: The Max. cable length may vary depending on the condition of installation, humidity or materials, etc.
Indoor/Outdoor separate
power supply
Wire No. o Size (mm²)
Indoor unit-Outdoor unit
2 o Min. 0.3
Max. 120 m
Indoor unit-Outdoor unit earth
—
Note: The optional indoor power supply terminal kit is necessary.
Be sure to connect the indoor-outdoor connecting cables directly to the units (no intermediate connections).
Intermediate connections can lead to communication errors if water enters the cables and causes insufficient
insulation to ground or a poor electrical contact at the intermediate connection point.
Cross section of cable
Round
Wire size (mm2)
Number of wires
2.5
3
2.5
3
1.5
4
2.5
4
Flat
Flat
Round
Polarity
Clockwise : S1-S2-S3
(Pay attention to stripe of yellow and green.)
Not applicable
*4
Not applicable
(since center wire has no cover finish.)
From left to right : S1-Open-S2-S3
(18)
*2
Clockwise : S1-S2-S3-Open
(Connect S1 and S3 to the opposite angle.)
(30)
*3
Note: Power supply cords of appliances shall not be lighter than design 60245 IEC or
227 IEC.
*1 In case that cable with stripe of yellow and green is available.
*2 In case of regular polarity connection (S1-S2-S3), wire size is 1.5 mm2.
*3 In case of regular polarity connection (S1-S2-S3).
*4 In the flat cables are connected as this picture, they can be used up to 30 m.
*5 Mentioned cable length is just a reference value.
It may be different depending on the condition of installation, humidity or
materials, etc.
OCH583A
L (m)*5
(30)
*1
(3C Flat cable × 2)
S1
14
S2
S3
9
REFRIGERANT SYSTEM DIAGRAM
9-1. Refrigerant SYSTEM DIAGRAM
PUHZ-SW160YKA.UKPUHZ-SW200YKA.UK
PUHZ-SW160YKA-BS.UKPUHZ-SW200YKA-BS.UK
PUHZ-SW160YKAR1.UKPUHZ-SW200YKAR1.UK
PUHZ-SW160YKAR1-BS.UKPUHZ-SW200YKAR1-BS.UK
Unit: mm (in)
Refrigerant flow in cooling
Refrigerant flow in heating
Ball valve
Refrigerant GAS pipe
<Brazing>
connection [25.4([1 inch)
High pressure
Charge plug
(High pressure) sensor 63HS
Heat exchanger
Thermistor TH7
Thermistor TH6
(Ambient)
(2-phase pipe)
Strainer
#50
4-way valve
Charge plug
(Low pressure)
High pressure
switch 63H
Muffler
Accumulator
Strainer
#100
Thermistor TH8
(Heat sink)
Oil return hole
with strainer #40
Refrigerant LIQUID pipe
SW160 : connection [9.52([3/8 inch)
SW200 : connection [12.7([1/2 inch)
Stop valve
(with service port)
Thermistor TH3
(Liquid)
Thermistor TH32
(Comp. surface)
Compressor
Strainer Linear expansion valve A Strainer
#100
#100
LEV-A
HEX
Stop valve
OCH583A
15
Distributor
9-2. Refrigerant collecting (pump down)
When relocating or disposing of the indoor/outdoor unit, pump down the system following the procedure below so that no refrigerant is released into the atmosphere.
1 Turn off the power supply (circuit breaker).
2 Connect the low-pressure valve on the gauge manifold to the charge plug (low pressure side) on the outdoor unit.
3 Close the liquid stop valve completely.
4 Supply power (circuit breaker).
• When power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If “CENTRALLY CONTROLLED” is displayed, the refrigerant collecting (pump down) cannot be completed normally.
• Startup of the indoor-outdoor communication takes about 3 minutes after the power (circuit breaker) is turned on. Start the
pump-down operation 3 to 4 minutes after the power (circuit breaker) is turned on.
5 Perform the refrigerant collecting operation (cooling test run).
• Push the pump-down SWP switch (push-button type) on the control board of the outdoor unit. The compressor and ventilators
(indoor and outdoor units) start operating (refrigerant collecting operation begins). (LED1 and LED2 on the control board of
the outdoor unit are lit.)
• Only push the pump-down SWP switch if the unit is stopped. However, even if the unit is stopped and the pump-down SWP
switch is pushed less than 3 minutes after the compressor stops, the refrigerant collecting operation cannot be performed.
Wait until the compressor has been stopped for 3 minutes and then push the pump-down SWP switch again.
6 Fully close the ball valve on the gas pipe side of the outdoor unit when the pressure gauge on the gauge manifold shows 0.05
to 0 MPa [Gauge] (approx. 0.5 to 0 kgf/cm²) and quickly stop the air conditioner.
• Because the unit automatically stops in about 3 minutes when the refrigerant collecting operation is completed (LED1 off,
LED2 lit), be sure to quickly close the gas ball valve. However, if LED1 is lit, LED2 is off, and the unit is stopped, open the
liquid stop valve completely, close the valve completely after 3 minutes or more have passed, and then repeat step 5. (Open
the gas ball valve completely.)
• If the refrigerant collecting operation has been completed normally (LED1 off, LED2 lit), the unit will remain stopped until the
power supply is turned off.
• Note that when the extension piping is very long with a large refrigerant amount, it may not be possible to perform a pump
down operation. In this case, use refrigerant recovery equipment to collect all of the refrigerant in the system.
7 Turn off the power supply (circuit breaker), remove the gauge manifold, and then disconnect the refrigerant pipes.
Warning:
When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes.
• If the refrigerant pipes are disconnected while the compressor is operating and the stop valve (ball valve) is open, the
pressure in the refrigeration cycle could become extremely high if air is drawn in, causing the pipes to burst, personal
injury, etc.
Note: This section is applicable only for PAC-IF061/062B-E/PAC-SIF051B-E or later models.
OCH583A
16
10
TROUBLESHOOTING
10-1. TROUBLESHOOTING
<Check code displayed by self-diagnosis and actions to be taken for service (summary)>
Present and past check codes are logged, and they can be displayed on the wired remote controller and control board of outdoor unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summarized in the table below. Check the contents below before investigating details.
Unit conditions at service
Check code
Actions to be taken for service (summary)
Displayed
Judge what is wrong and take a corrective action according
to “10-2. SELF-DIAGNOSIS ACTION TABLE”.
The trouble is reoccurring.
Not displayed
Conduct trouble shooting and ascertain the cause of the
trouble according to “10-3. TROUBLESHOOTING OF
PROBLEMS”.
1Consider the temporary defects such as the work of
protection devices in the refrigerant circuit including
compressor, poor connection of wiring, noise, etc.
Re-check the symptom, and check the installation
environment, refrigerant amount, weather when the
trouble occurred, matters related to wiring, etc.
2Reset check code logs and restart the unit after finishing
service.
3There is no abnormality in electrical component,
controller board, remote controller, etc.
Logged
The trouble is not reoccurring.
Not logged
OCH583A
17
1Re-check the abnormal symptom.
2Conduct trouble shooting and ascertain the cause of the
trouble according to “10-3. TROUBLESHOOTING OF
PROBLEMS”.
3Continue to operate unit for the time being if the cause
is not ascertained.
4There is no abnormality concerning of parts such as
electrical component, controller board, remote controller,
etc.
10-2. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is put on>
Check Code
Abnormal points and detection method
Note: Refer to indoor unit section for codes starting with P and E.
Judgment and action
Case
1No voltage is supplied to termi- 1Check following items.
nal block (TB1) of outdoor unit.
a) Power supply breaker is
a) Power supply breaker
turned off.
b) Contact failure or disconnecb) Connection of power supply terminal block
tion of power supply terminal
(TB1)
c) Open phase (L2 or N phase)
c) Connection of power supply terminal block
(TB1)
2Electric power is not supplied
to power supply terminal of outdoor power circuit board.
a) Contact failure of power
supply terminal
b) Open phase on the outdoor
power circuit board
(Disconnection of terminal
on outdoor power circuit
board)
3Electric power is not supplied
to outdoor controller circuit
board.
a) Disconnection of connector
(CNDC)
None
—
2Check following items.
a) Connection of power supply terminal block
(TB1)
b) Connection of terminal on outdoor power
circuit board
3 Check connection of the connector (CNDC)
on the outdoor controller circuit board.
Check connection of the connector CNDC
on the noise filter circuit board. Refer to "106. TEST POINT DIAGRAM".
4Disconnection of reactor (ACL4) 4 Check connection of reactor. (ACL4)
Refer to "8. WIRING DIAGRAM".
5Disconnection of outdoor noise 5 a) Check connection of outdoor noise filter
circuit board.
filter circuit board or parts failure in outdoor noise filter circuit b) Replace outdoor noise filter circuit board.
Refer to "10-6. TEST POINT DIAGRAM".
board
6Defective outdoor power circuit 6 Replace outdoor power circuit board.
board
F5
(5201)
7Open of rush current protect
resistor (RS)
7 Replace rush current protect resistor (RS)
Power circuit board might be short-circuit.
Check the power circuit board. (Refer to "106. TEST POINT DIAGRAM".)
8Defective outdoor controller
circuit board
8 Replace controller board. (When items
above are checked but the units cannot be
repaired.)
63H connector open
1Disconnection or contact failure
Abnormal if 63H connector circuit is open
of 63H connector on outdoor
for 3 minutes continuously after power supcontroller circuit board
ply.
2Disconnection or contact failure
63H: High-pressure switch
of 63H
363H is working due to defective
parts.
4Defective outdoor controller
circuit board
OCH583A
18
1Check connection of 63H connector on
outdoor controller circuit board.
Refer to "10-6. TEST POINT DIAGRAM".
2Check the 63H side of connecting wire.
3Check continuity by tester.
Replace the parts if the parts are defective.
4Replace outdoor controller circuit board.
Check Code
EA
(6844)
Abnormal points and detection method
Case
Judgment and action
Miswiring of indoor/outdoor unit
connecting wire
1.Outdoor controller circuit board can
automatically check the number of
connected indoor units. Abnormal if the
number cannot be checked automatically
due to miswiring of indoor/outdoor unit
connecting wire, etc. after power is
turned on for 4 minutes.
2.Abnormal if outdoor controller circuit
board recognizes excessive number of
indoor units.
1Contact failure or miswiring of
indoor/outdoor unit connecting
wire
2Diameter or length of indoor/
outdoor unit connecting wire is
out of specified capacity.
3Excessive number of indoor
units are connected to 1 outdoor unit.
4Defective transmitting receiving
circuit of outdoor controller
circuit board
5Defective transmitting receiving
circuit of indoor controller board
6Defective indoor power board
72 or more outdoor units have
refrigerant address “0” .
(In case of group control)
8Noise has entered into power
supply or indoor / outdoor unit
connecting wire.
1Check disconnection or looseness or polarity
of indoor/outdoor unit connecting wire of
indoor and outdoor units.
2Check diameter and length of indoor/outdoor
unit connecting wire.
Total wiring length: 80 m
(including wiring connecting each indoor unit
and between indoor and outdoor unit)
Also check if the connection order of flat
cable is S1, S2, S3.
3Check the number of indoor units that are
connected to one outdoor unit. (If EA is
detected)
4–6 Turn the power off once, and on again to
check.
Replace outdoor controller circuit board,
indoor controller board or indoor power
board if abnormality occurs again.
7Check if refrigerant addresses (SW1-3 to
SW1-6 on outdoor controller circuit board) are
overlapping in case of group control system.
Eb
(6845)
Miswiring of indoor/outdoor unit
connecting wire (converse wiring or
disconnection)
Outdoor controller circuit board can
automatically set the unit number of indoor
units.
Abnormal if the indoor unit number cannot
be set within 4 minutes after power on
because of miswiring (converse wiring
or disconnection) of indoor/outdoor unit
connecting wire.
1Contact failure or miswiring of
indoor/outdoor unit connecting 8Check transmission path, and remove the
cause.
wire
2Diameter or length of indoor/
Note: The descriptions above 1–8, are for EA,
outdoor unit connecting wire is
Eb and EC.
out of specified capacity.
4Defective transmitting receiving
circuit of outdoor controller circuit
board
5Defective transmitting receiving
circuit of indoor controller board
6Defective indoor power board
72 or more outdoor units have
refrigerant address “0” .
(In case of group control)
8Noise has entered into power
supply or indoor/outdoor unit
connecting wire.
Startup time over
The unit cannot finish startup process
within 4 minutes after power on.
1Contact failure of indoor/
outdoor unit connecting wire
2Diameter or length of indoor/
outdoor unit connecting wire is
out of specified capacity.
72 or more outdoor units have
refrigerant address “0” .
(In case of group control)
8Noise has entered into power
supply or indoor/outdoor unit
connecting wire.
EC
(6846)
OCH583A
19
<Abnormalities detected while unit is operating>
Check Code
Abnormal points and detection method
High pressure (High-pressure switch
63H operated)
Abnormal if high-pressure switch 63H
(4.15MPa) operated during compressor
operation.
U1
(1302)
High comp. surface temperature
(1) Abnormal if comp. surface thermistor (TH32)
exceeds 125°C or 115°C continuously for
5 minutes.
Abnormal if comp. surface thermistor (TH32)
exceeds 110°C or more continuously for
30 seconds after 90 seconds have passed
since the defrosting operation started.
(2) Abnormal if discharge superheat
(Cooling: TH32−T63HS
Heating: TH32−T63HS ) increases.
All the conditions in A or B are detected
simultaneously for 10 minutes continuously after 6 minutes past from compressor startup (including the thermostat indication or recovery from defrosting).
<Condition A>
U2
(TH32:1132) • Heating mode
• When discharge superheat is less than
70°C.
• When the TH6 temp is more than the
value obtained by TH7−5:.
• When the condensing temp of TH5 is
less than 35:.
<Condition B>
• During compressor operation (Cooling
and Heating)
• When discharge superheat is less than
80°C in Cooling.
• When discharge superheat is less than
90°C in Heating.
• When condensing temp of TH6 is
more than −40:. (In Cooling only.)
U3
(TH32:5132)
Open/short circuit of comp. surface
thermistor (TH32)
Abnormal if open (−20°C or less) or
short (217°C or more) is detected during
compressor operation.
(Detection is inoperative for 10 minutes
of compressor starting process and for 10
minutes after and during defrosting.)
OCH583A
Case
1Decreased water flow
2Clogged filter of water pipe
3Locked water pump
4Malfunction of water pump
5Dirt of indoor heat exchanger
6Defective operation of stop
valve (Not full open)
7Clogged or broken pipe
8Locked outdoor fan motor
9Malfunction of outdoor fan motor
0Short cycle of outdoor unit
1Dirt of outdoor heat exchanger
2Decreased airflow caused by
defective inspection of outside
temperature thermistor
(It detects lower temperature
than actual temperature.)
3Disconnection or contact failure
of connector (63H) on outdoor
controller board
4Disconnection or contact failure
of 63H connection
5Defective outdoor controller board
6Defective action of linear
expansion valve
7Malfunction of fan driving circuit
1Overheated compressor
operation caused by shortage
of refrigerant
2Defective operation of stop
valve
3Defective thermistor
4Defective outdoor controller
board
5Defective action of linear
expansion valve
Judgment and action
1−5 Check water circuit and repair defect.
6Check if stop valve is fully open.
7Check piping and repair defect.
8−1 Check outdoor unit and repair defect.
2Check the detected temperature of outside
temperature thermistor on LED display.
(SW2 on A-Control Service Tool : Refer
to "10-7. FUNCTION OF SWITCHES,
CONNECTORS AND JUMPERS".)
3−5Turn the power off and check if F5 is
displayed when the power is turned on
again.
When F5 is displayed, refer to “Judgment
and action” for F5.
6Check linear expansion valve.
Refer to "10-4. HOW TO CHECK THE PARTS".
7Replace outdoor controller board.
1Check intake superheat.
Check leakage of refrigerant.
Charge additional refrigerant.
2Check if stop valve is fully open.
34Turn the power off and check if U3 is
displayed when the power is on again.
When U3 is displayed, refer to “Judgment
and action” for U3.
5Check linear expansion valve.
Refer to "10-4. HOW TO CHECK THE
PARTS".
1Disconnection or contact failure 1Check connection of connector (TH32) on the
outdoor controller circuit board. Check breaking
of connector (TH32) on the
of the lead wire for thermistor TH32). Refer to
outdoor controller circuit board
"10-6. TEST POINT DIAGRAM".
2Defective thermistor
2Check resistance value of thermistor (TH32)
3Defective outdoor controller
or temperature by microprocessor.(Thermistor/
circuit board
TH32: Refer to "10-4. HOW TO CHECK THE
PARTS".)(SW2 on A-Control Service Tool:
Refer to "10-7. FUNCTION OF SWITCHES,
CONNECTORS AND JUMPERS".)
3Replace outdoor controller board.
20
Check Code
Abnormal points and detection method
Open/short of outdoor unit thermistors
(TH3, TH6, TH7, and TH8)
Abnormal if open or short is detected during
compressor operation.
Open detection of thermistors TH3 and TH6
is inoperative for 10 seconds to 10 minutes
after compressor starting and 10 minutes
after and during defrosting.
Note:Check which unit has abnormality
in its thermistor by switching the
U4
mode of SW2. (PAC-SK52ST) (Refer
(TH3:5105)
to "10-7. FUNCTION OF SWITCHES,
(TH6:5107)
CONNECTORS AND JUMPERS".)
(TH7:5106)
(TH8:5110)
Symbol
TH3
TH6
TH7
TH8
U6
(4250)
U8
(4400)
)
(
Thermistors
Name
Thermistor <Liquid>
Thermistor <2-phase pipe>
Thermistor <Ambient>
Thermistor <Heat sink>
Temperature of heat sink
Abnormal if heat sink thermistor (TH8)
detects 90:.
U5
(4230)
Judgment and action
connection
1Check
of connector (TH3,TH6/TH7)
1Disconnection or contact failure
on the outdoor controller circuit board. Check
of connectors
connection of connector (CN3) on the outdoor
Outdoor controller circuit
power circuit board. Check breaking of the lead
board: TH3, TH6/TH7
wire for thermistor (TH3,TH6,TH7,TH8). Refer to
Outdoor power circuit board:
"10-6. TEST POINT DIAGRAM"
CN3
2Check resistance value of thermistor
2Defective thermistor
(TH3,TH6,TH7,TH8) or check temperature by
3Defective outdoor controller
microprocessor. (Thermistor/TH3,TH6,TH7,TH8:
circuit board
Refer to "10-4. HOW TO CHECK THE PARTS".)
(SW2 on A-Control Service Tool: Refer to "10-7.
FUNCTION OF SWITCHES, CONNECTORS AND
JUMPERS.)
3Replace outdoor controller circuit board.
Case
1The outdoor fan motor is
locked.
2 Failure of outdoor fan motor
3 Air flow path is clogged.
4 Rise of ambient temperature
5 Defective thermistor
6 Defective input circuit of
outdoor power circuit board
7 Failure of outdoor fan drive
circuit
Open detection
Short detection
−40: or below
−40: or below
−40: or below
−27: or below
90: or above
90: or above
90: or above
102: or above
12 Check outdoor fan.
3 Check air flow path for cooling.
4 Check if there is something which causes
temperature rise around outdoor unit.
(Upper limit of ambient temperature is 46°C.)
Turn off power, and on again to check if U5 is
displayed within 30 minutes.
If U4 is displayed instead of U5, follow the
action to be taken for U4.
5 Check resistance value of thermistor (TH8)
or temperature by microcomputer. (Thermistor/
TH8: Refer to "10-4. HOW TO CHECK THE PARTS".)
(SW2 on A-Control Service Tool: Refer to "10-7.
FUNCTION OF SWITCHES, CONNECTORS AND
JUMPERS".)
6 Replace outdoor power circuit board.
7 Replace outdoor controller circuit board.
Power module
1Outdoor stop valve is closed.
Check abnormality by driving power module 2Decrease of power supply voltage
in case overcurrent is detected.
3Looseness, disconnection or
(UF or UP error condition)
converse of compressor wiring
connection
4Defective compressor
5Defective outdoor power circuit
board
1Open stop valve.
2 Check facility of power supply.
3 Correct the wiring (U•V•W phase) to
compressor. Refer to "10-6. TEST POINT
DIAGRAM". (Outdoor power circuit board).
4 Check compressor referring to "10-4. HOW
TO CHECK THE PARTS".
5 Replace outdoor power circuit board.
Outdoor fan motor
1 Failure in the operation of the
Abnormal if rotational frequency of the fan
DC fan motor
motor is not detected during DC fan motor 2 Failure in the outdoor circuit
operation.
controller board
Fan motor rotational frequency is abnormal
if;
• 100 rpm or below detected continuously
for 15 seconds at 20: or more outside
air temperature.
• 50 rpm or below or 1500 rpm or more
detected continuously for 1 minute.
1 Check or replace the DC fan motor.
OCH583A
21
2 Check the voltage of the outdoor circuit
controller board during operation.
3 Replace the outdoor circuit controller board.
(when the failure is still indicated even after
performing the action 1 above.)
Check Code
Abnormal point and detection method
Judgment and action
Case
Detailed To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6.
codes Refer to "10-7. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS".
01
02
Overvoltage error
bnormal increase in power source 1 Check the field facility for the power supply.
1 A
2C
orrect the wiring (U.V.W phase) to
• Increase in DC bus voltage to
voltage
compressor. Refer to "10-6. TEST
760 V
2 Disconnection of compressor wiring
POINT DIAGRAM" (Outdoor power
circuit board).
3 Replace outdoor power circuit board.
3 Defective outdoor power circuit
4 Check compressor for electrical
board
insulation. Replace compressor.
4 Compressor has a ground fault.
Undervoltage error
1 Check the field facility for the power
1 Decrease in power source voltage,
• Instantaneous decrease in DC
instantaneous stop.
supply.
bus voltage to 400 V
2 Defective 52C drive circuit in outdoor 2 Replace outdoor power circuit board.
power circuit board
3D
isconnection or loose connection of 3 Check RS wiring.
rush current protect resistor RS
4D
efective rush current protect
resistor RS
04
U9
(4220)
08
10
20
4 Replace RS.
1 L1-phase open
Input current sensor error/
L1-phase open error
2D
isconnection or loose connection
• Decrease in input current
between TB1 and outdoor noise
through outdoor unit to 0.1A
filter circuit board
only if operation frequency is
3D
isconnection or loose connection
more than or equal to 40Hz
of CN5 on the outdoor power circuit
or compressor current is more
board/CNCT on the outdoor noise
than or equal to 6A.
filter board
4 Defective ACCT (AC current trans)
on the outdoor noise filter circuit
board
5 Defective input current detection
circuit in outdoor power circuit board
6 Defective outdoor controller circuit
board
1C
heck the field facility for the power
supply.
2 Check the wiring between TB1 and
outdoor noise filter circuit board.
Abnormal power synchronous
signal
• No input of power synchronous
signal to power circuit board
• Power synchronous signal
of 44 Hz or less, or 65 Hz or
more is detected on power
circuit board.
1C
heck the field facility for the power
supply.
2 Check earth wiring.
1D
istortion of power source voltage,
noise superimposition.
2 Disconnection or loose connection
of earth wiring
3 Disconnection or loose connection
of CN2 on the outdoor power circuit
board /controller circuit board
4 Defective power synchronous signal
circuit in outdoor controller circuit
board
5 Defective power synchronous signal
circuit in outdoor power circuit board
PFC error (Overvoltage/
Not applicable for SW160/200Y model.
Undervoltage/Overcurrent)
• PFC detected any of the following:
a) Increase of DC bus voltage
to 420 V.
b) Decrease in PFC control
voltage to 12 V DC or lower.
c) Increase in input current
to 50 A peak. (For models
equipped with single-phase
PFC only)
PFC/IGBT error
Not applicable for SW160/200Y model.
(Undervoltage)
• When Compressor is running, DC bus voltage stays at
310V or lower for consecutive 10 seconds. (For models
equipped with single-phase
PAM converter only)
OCH583A
22
3 Check CN5/CNCT wiring.
4R
eplace outdoor noise filter circuit
board.
5 Replace outdoor power circuit board.
6 Replace outdoor controller circuit board.
3 Check CN2 wiring.
4 Replace outdoor controller circuit board.
5 Replace outdoor power circuit board.
Check the switch setting for Model Select
on the outdoor controller circuit board.
Check the switch setting for Model Select
on the outdoor controller circuit board.
Check Code
Ud
(1504)
UE
Abnormal point and detection method
Over heat protection
Abnormal if thermistor <liquid> (TH3)
detects 70: or more during compressor
operation.
UL
(1300)
Judgment and action
1Defective outdoor fan (fan
1Check outdoor unit air passage.
motor) or short cycle of outdoor
unit during cooling operation
2Defective thermistor <liquid>
23 Turn the power off and on again to check
(TH3)
the check code. If U4 is displayed, follow the
3Defective outdoor controller
U4 processing direction.
board
Abnormal pressure of pressure sensor 1Disconnection or contact
(63HS)
failure of connector (63HS) on
Abnormal if pressure sensor (63HS)
the outdoor controller circuit
detects 0.1 MPa or less.
board
Detection is inoperative for 3 minutes after 2Defective pressure sensor
compressor starting and 3 minutes after
and during defrosting.
3Defective outdoor controller
circuit board
1Check connection of connector (63HS) on
the outdoor controller circuit board.
Check breaking of the lead wire for thermistor
(63HS).
2 Check pressure by microprocessor.
(Pressure sensor/ 63HS)
(SW2: Refer to "10-7. FUNCTION OF
SWITCHES, CONNECTORS AND JUMPERS". )
3Replace outdoor controller board.
Compressor overcurrent interruption
(When compressor locked)
Abnormal if overcurrent of DC bus or
compressor is detected within 30 seconds
after compressor starts operating.
1Open stop valve.
2Check facility of power supply.
3Correct the wiring (U•V•W phase) to
compressor. Refer to "10-6. TEST POINT
DIAGRAM" (Outdoor power circuit board).
4Check compressor.
Refer to "10-4. HOW TO CHECK THE PARTS".
5Replace outdoor power circuit board.
6Check the dip switch setting of outdoor controller circuit board. Refer to "Model Select" in
"1) Function of switches" in "10-7. FUNCTION
OF SWITCHES, CONNECTORS AND
JUMPERS".
UF
(4100)
UH
(5300)
Case
1Stop valve is closed.
2Decrease of power supply
voltage
3Looseness, disconnection or
converse of compressor wiring
connection
4Defective compressor
5Defective outdoor power board
6DIP switch setting difference of
outdoor controller circuit board.
Current sensor error or input current error 1Disconnection of compressor
wiring
• Abnormal if current sensor detects −1.0A
2Defective circuit of current
to 1.0A during compressor operation.
sensor on outdoor power circuit
(This error is ignored in case of test run
board
mode.)
3Decrease of power supply
voltage
4Leakage or shortage of
refrigerant
1 Correct the wiring (U•V•W phase) to
compressor. Refer to "10-6. TEST POINT
DIAGRAM" (Outdoor power circuit board).
2Replace outdoor power circuit board.
Low pressure
Abnormal if the following conditions are
detected for continuously 3 minutes after
compressor starts heating operating for 10
minutes.
1. Heating mode
• Detection mode 1
TH7−TH3 [ 4°C and
T63HS−Indoor room temperature [ 2°C
• Detection mode 2
TH7−TH3 [ 2°C,
T63HS−Indoor room temperature [ 4°C and
TH2−Indoor room temperature [ 4°C
1Check stop valve.
2. Cooling mode
TH6−TH7 [ 2°C and
TH3−TH7 [ 2°C and
Indoor room temperature−Indoor liquid
pipe temperature (TH2) [ 5°C
1Stop valve of outdoor unit is
closed during operation.
2Leakage or shortage of
refrigerant
2 Check intake superheat.
Check leakage of refrigerant.
Check additional refrigerant.
3Malfunction of linear expansion 3 Check linear expansion valve.
valve
Refer to "10-4. HOW TO CHECK THE
PARTS".
4Clogging with foreign objects in
refrigerant circuit
4 After recovering refrigerant, remove water
Note: Clogging occurs in the
from entire refrigerant circuit under vacuum
parts which become below
more than 1 hour.
freezing point when water
enters in refrigerant circuit.
Thermistor TH3: Outdoor liquid pipe temperature
TH6: Outdoor 2-phase pipe temperature
TH7: Ambient temperature
T63HS: Condensing temperature
OCH583A
3Check the facility of power supply.
4Check leakage of refrigerant.
23
Check Code
UP
(4210)
Abnormal points and detection method
Case
Compressor overcurrent interruption
1Stop valve of outdoor unit is
Abnormal if overcurrent DC bus or comclosed.
pressor is detected after compressor starts 2Decrease of power supply voltage
operating for 30 seconds.
3Looseness, disconnection or
converse of compressor wiring
connection
4Defective fan of outdoor units
5Short cycle of outdoor units
6Defective input circuit of
outdoor controller board
7Defective compressor
8Defective outdoor power circuit
board
9DIP switch setting difference of
outdoor controller circuit board
Judgment and action
1Open stop valve.
2 Check facility of power supply.
3 Correct the wiring (U•V•W phase) to
compressor. Refer to "10-6. TEST POINT
DIAGRAM". (Outdoor power circuit board).
4 Check outdoor fan.
5 Solve short cycle.
6 Replace outdoor controller circuit board.
7 Check compressor. Refer to "10-4. HOW TO
CHECK THE PARTS".
efore the replacement of the outdoor controller circuit
B
board, disconnect the wiring to compressor from the
outdoor power circuit board and check the output voltage among phases, U, V, W, during test run. No defect
on board if voltage among phases (U-V, V-W and W-U)
is same. Make sure to perform the voltage check with
same performing frequency.
8 Replace outdoor power circuit board
9 Check the DIP switch setting of outdoor
controller circuit board
Remote controller transmission error
(E0)/signal receiving error (E4)
1 Abnormal if main or sub remote controller cannot receive normally any transmission from indoor unit of refrigerant
address “0” for 3 minutes.
(Check code : E0)
2 Abnormal if sub remote controller could
not receive any signal for 2 minutes.
(Check code: E0)
E0
or
E4
E1
or
E2
1 Abnormal if indoor controller board
cannot receive normally any data from
remote controller board or from other
indoor controller board for 3 minutes.
(Check code: E4)
2 Indoor controller board cannot receive
any signal from remote controller for 2
minutes. (Check code: E4)
Remote controller control board
1Abnormal if data cannot be normally
read from the nonvolatile memory of the
remote controller control board.
(Check code: E1)
2Abnormal if the clock function of remote
controller cannot be normally operated.
(Check code: E2)
OCH583A
1Contact failure at transmission
wire of remote controller
2All remote controllers are set
as “sub” remote controller.
In this case, E0 is displayed
on remote controller, and E4
is displayed at LED (LED1,
LED2) on the outdoor controller
circuit board.
3Miswiring of remote controller
4Defective transmitting receiving
circuit of remote controller
5Defective transmitting receiving circuit of indoor controller
board of refrigerant address “0”
6Noise has entered into the
transmission wire of remote
controller.
1Defective remote controller
24
1Check disconnection or looseness of indoor
unit or transmission wire of remote controller.
2Set one of the remote controllers “main” if
there is no problem with the action above.
3Check wiring of remote controller.
Refer to the indoor unit's Installation Manual
for remote controller connection.
If the cause of trouble is not any of 1–3 above,
4Diagnose remote controllers.
a) When “RC OK” is displayed, remote controllers
have no problem. Turn the power off, and on
again to check. If abnormality generates again,
replace indoor controller board.
b) When “RC NG” is displayed, replace
remote controller.
c) When “RC E3” or “ERC 00–66” is displayed, noise may be causing abnormality.
1Replace remote controller.
Check Code
E3
or
E5
E6
(6840)
E7
E8
(6840)
Abnormal points and detection method
Case
Judgment and action
Remote controller transmission error
(E3)/signal receiving error (E5)
1Abnormal if remote controller could not
find blank of transmission path for 6
seconds and could not transmit.
(Check code: E3)
2Remote controller receives transmitted
data at the same time, compares the
data, and when detecting it, judges
different data to be abnormal 30
continuous times. (Check code: E3)
12 remote controllers are set as 1Set a remote controller to main, and the
“main.”
other to sub.
(In case of 2 remote controllers)
Refer to the indoor unit's
Installation Manual for remote
controller connection.
2Repetition of refrigerant
2The address changes to a separate setting.
address
3Defective transmitting receiving 3−5 Diagnose remote controller.
circuit of remote controller
a) When “RC OK” is displayed, remote
controllers have no problem.
4Defective transmitting receiving
circuit of indoor controller board
3Abnormal if indoor controller board could
Turn the power off, and on again to check.
not find blank of transmission path.
When becoming abnormal again, replace
5Noise has entered into
(Check code: E5)
transmission wire of remote
indoor controller board.
controller.
4Indoor controller board receives
b) When “RC NG” is displayed, replace
transmitted data at the same time,
remote controller.
compares the data, and when detecting
c) When “RC E3” or “ERC 00–66” is
it, judges different data to be abnormal
displayed, noise may be causing
30 continuous times. (Check code: E5)
abnormality.
Indoor/outdoor unit communication
error (Signal receiving error)
1Abnormal if indoor controller board could
not receive any signal normally for 6
minutes after turning the power on.
2Abnormal if indoor controller board could
not receive any signal normally for 3
minutes.
3Consider the unit as abnormal under
the following condition. When 2 or more
indoor units are connected to an outdoor
unit, indoor controller board could not
receive a signal for 3 minutes from
outdoor controller circuit board, a signal
which allows outdoor controller circuit
board to transmit signals.
1Contact failure, short circuit or
miswiring (converse wiring) of
indoor/outdoor unit connecting
wire
2Defective transmitting receiving
circuit of outdoor controller
circuit board.
3Defective transmitting receiving
circuit of indoor controller
board.
4Noise has entered into indoor/
outdoor unit connecting wire.
5Defective fan motor
6Defective rush current resistor
of outdoor power circuit board
heck LED display on outdoor controller circuit
C
board. (Connect A-Control service tool (PACSK52ST))
Refer to EA−EC item if LED displays EA−AC.
1Check disconnecting or looseness of indoor /
outdoor unit connecting wire of indoor unit or
outdoor unit.
Check all the units in case of twin/triple/
quadruple indoor unit system.
2–4Turn the power off, and on again to check.
If abnormality generates again, replace indoor
controller board or outdoor controller circuit
board.
Note: Other indoor controller board may have
defect in the case of twin/triple/quadruple
indoor unit system.
5Turn the power off, and detach fan motor
from connector (CNF1, 2). Then turn the
power on again.
If abnormality is not displayed, replace fan
motor.
If abnormality is displayed, replace outdoor
controller circuit board.
6 Check the rush current resistor on outdoor
power circuit board with tester. If open is
detected, replace the power circuit board.
Indoor/outdoor unit communication
1Defective transmitting receiving 1–3 Turn the power off, and on again to
error (Transmitting error)
circuit of indoor controller board
check. If abnormality generates again,
Abnormal if “1” receiving is detected 30
replace indoor controller board.
2Noise has entered into power
times continuously though indoor controller
supply.
board has transmitted “0”.
3Noise has entered into outdoor
control wire.
Indoor/outdoor unit communication
1Contact failure of indoor/
1Check disconnection or looseness of indoor/
error (Signal receiving error)
outdoor unit connecting wire
outdoor unit connecting wire of indoor or
(Outdoor unit)
outdoor units.
2Defective communication circuit
Abnormal if outdoor controller circuit board
of outdoor controller circuit board 2–4 Turn the power off, and on again to
could not receive anything normally for 3
check. Replace indoor controller board
3Defective communication circuit
minutes.
of indoor controller board
or outdoor controller circuit board if
abnormality is displayed again.
4Noise has entered into indoor/
outdoor unit connecting wire.
OCH583A
25
Check Code
Abnormal points and detection method
E9
(6841)
Indoor/outdoor unit communication
error (Transmitting error) (Outdoor unit)
1Abnormal if “0” receiving is detected 30
times continuously though outdoor controller circuit board has transmitted “1”.
2Abnormal if outdoor controller circuit
board could not find blank of transmission
path for 3 minutes.
1Indoor/ outdoor unit connecting 1Check disconnection or looseness of indoor/
wire has contact failure.
outdoor unit connecting wire.
2Defective communication circuit 2–4 Turn the power off, and on again to
of outdoor controller circuit board
check. Replace outdoor controller circuit
board if abnormality is displayed again.
3Noise has entered power supply.
4Noise has entered indoor/ outdoor unit connecting wire.
Non defined check code
This code is displayed when non defined
check code is received.
1Noise has entered transmission 12 Turn the power off, and on again to check.
wire of remote controller.
Replace indoor controller board or outdoor
controller circuit board if abnormality is
2Noise has entered indoor/ outdoor unit connecting wire.
displayed again.
3Outdoor unit is not a series of 3Replace outdoor unit with power-inverter type
power-inverter.
outdoor unit.
EF
(6607
or
6608)
Ed
(0403)
PL
Case
Judgment and action
Serial communication error
1Breaking of wire or contact
12 Check connection of each connector CN2
1 Abnormal if serial communication
failure of connector CN2
and CN4 between the outdoor controller
between outdoor controller circuit board
between the outdoor controller
circuit board and the outdoor power circuit
and outdoor power circuit board is defeccircuit board and the outdoor
board.
tive.
power circuit board
2Breaking of wire or contact
failure of connector CN4
between the outdoor controller
circuit board and the outdoor
power circuit board
3Defective communication circuit 3Replace outdoor power circuit board.
of outdoor power circuit board
4Defective communication circuit 4Replace outdoor controller circuit board.
of outdoor controller circuit board
for outdoor power circuit board
Abnormal refrigerant circuit
During Cooling operation, the following
conditions are regarded as failures when
detected for 1 second.
a)The compressor continues to run for 30
or more seconds.
b)The liquid pipe temperature or the
condenser/evaporator temperature is
75°C or more.
These detected errors will not be
cancelled until the power source is
reset.
OCH583A
1Abnormal operation of 4-way
valve
2 Disconnection of or leakage in
refrigerant pipes
3 Air into refrigerant piping
4 Defective refrigerant circuit
(clogging)
26
1When this error occurs, be sure to
replace the 4-way valve.
2Check refrigerant pipes for disconnection or
leakage.
3After the recovery of refrigerant, vacuum
dry the whole refrigerant circuit.
4 Check refrigerant circuit for operation.
To avoid entry of moisture or air into
refrigerant circuit which could cause
abnormal high pressure, purge air in
refrigerant circuit or replace refrigerant.
10-3. TROUBLESHOOTING OF PROBLEMS
Phenomena
1. Remote controller display does not
work.
Factor
1 12 V DC is not supplied to remote controller.
(Power supply display
is not indicated on LCD.)
2 12–15 V DC is supplied to remote controller, however, no display is indicated.
• “PLEASE WAIT” is not displayed.
• “PLEASE WAIT” is displayed.
5. Remote controller display works
normally and the unit performs
heating operation, however, the
capacity cannot be fully obtained.
1 Linear expansion valve fault
Opening cannot be adjusted well due to linear
expansion valve fault.
2 Refrigerant shortage
3 Lack of insulation for refrigerant piping
4 Bypass circuit of outdoor unit fault
Countermeasure
1Check LED2 on indoor controller board.
(1) When LED2 is lit.
Check the remote controller wiring for
breaking or contact failure.
(2) When LED2 is blinking.
Check short circuit of remote controller
wiring.
(3) When LED2 is not lit.
Refer to phenomena No.3 below.
2Check the following.
• Failure of remote controller if “PLEASE
WAIT” is not displayed
• Refer to phenomena No.2 below if
“PLEASE WAIT” is displayed.
2. “PLEASE WAIT” display is remained 1 At longest 2 minutes after the power supply “PLEASE 1Normal operation
2Self-diagnosis of remote controller
on the remote controller.
WAIT” is displayed to start up.
2 Communication error between the remote controller 3”PLEASE WAIT” is displayed for 6 minutes at most in case of indoor/outdoor
and indoor unit
unit communication error. Check LED3 on
3 Communication error between the indoor and outindoor controller board.
door unit
(1) When LED3 is not blinking.
4 Outdoor unit protection device connector is open.
Check indoor/outdoor connecting wire
for Miswiring.
(Converse wiring of S1 and S2, or
break of S3 wiring.)
(2) When LED3 is blinking.
Indoor/outdoor connecting wire is
normal.
4Check LED display on outdoor controller
circuit board. Refer to "10-7. FUNCTION
OF SWITCHES, CONNECTORS AND
JUMPERS".
Check protection device connector (63H)
for contact failure.
Refer to "10-6. TEST POINT DIAGRAM".
3. When pressing the remote controller 1 After cancelling to select function from the remote
1Normal operation
operation switch, the OPERATION
controller, the remote controller operation switch will
display is appeared but it will be
be not accepted for approx. 30 seconds.
turned off soon.
1 • If refrigerant leaks, discharging
4. Remote controller display works
1 Refrigerant shortage
temperature rises and LEV opening
normally and the unit performs
increases. Inspect leakage by checking
cooling operation, however, the
the temperature and opening.
capacity cannot be fully obtained.
• Check pipe connections for gas leakage.
6. 1 F
or 3 minutes after temperature
12 Normal operation
adjuster turns off, the compressor
(For protection of compressor)
will not start operating even if
temperature adjuster is turned on.
2 For 3 minutes after temperature
adjuster turns on, the compressor
will not stop operating even if
temperature adjuster is turned off.
(Compressor stops operating
immediately when turning off by
the remote controller.)
OCH583A
27
1•D
ischarging temperature and indoor
heat exchanger temperature does not
rise.
Inspect the failure by checking
discharging pressure.
• Replace linear expansion valve.
2 • If refrigerant leaks, discharging
temperature rises and LEV opening
increases. Inspect leakage by checking
the temperature and opening.
• Check pipe connections for gas leakage.
3 Check the insulation.
4 Check refrigerant system during operation.
12 Normal operation
Symptoms: “PLEASE WAIT” is kept being displayed on the remote controller.
Diagnosis flow
Cause
Inspection method and
troubleshooting
Check the display time of “PLEASE WAIT”
after turning on the main power.
6 minutes
or more
How long is “PLEASE WAIT”
kept being displayed on the
remote controller?
2 minutes
or less
2 to 6
minutes
Are any check codes
displayed on the
remote controller?
Check the LED display of the
outdoor controller circuit board.
Are any check codes
displayed on the LED?
• “PLEASE WAIT”
• Normal
will be displayed
The startup diagnosis will
during the start-up
be over in around 2 minutes.
diagnosis after turning
on the main power.
NO
YES
YES
• Miswiring of indoor/
outdoor connecting
wire
• Breaking of indoor/
outdoor connecting
wire (S3)
• Defective indoor
controller board
• Defective outdoor
controller circuit
board
NO
• Defective indoor
controller board
• Defective remote
controller
OCH583A
28
• Refer to “Self-diagnosis
action table” in order to
solve the trouble.
• In case of communication
errors, the display of
remote controller may not
match the LED display of
the outdoor unit.
Symptoms: Nothing is displayed on the remote controller. 1
Diagnosis flow
Cause
LED display of the indoor
controller board
LED1 :
LED2 :
LED3 :
Inspection method and
troubleshooting
Check the voltage between S1
and S2 on the terminal block
(TB1) of the indoor unit which
is used to connect the indoor
unit and the outdoor unit.
198 to 264 V AC?
NO
Check the voltage among L(L3) and
N on the terminal block (TB1) of the
outdoor power circuit board.
198 to 264 V AC?
NO
• Troubles concerning
power supply.
• Check the power wiring
to the outdoor unit.
• Check the breaker.
• Bad wiring of the
outdoor controller
board.
• The fuses on the
outdoor controller
circuit board are
blown.
• Check the wiring of the
outdoor unit.
• Check if the wiring is bad.
Check if the fuses are blown.
The fuses on the outdoor
controller circuit board will
be blown when the indoor
/outdoor connecting wire
short-circuits.
• Bad wiring of the
outdoor controller
board.
• The fuses on the
outdoor controller
circuit board are
blown.
• Check if miswiring, breaking
or poor contact is causing this
problem. Indoor/outdoor
connecting wire is polarized
3-core type. Connect the
indoor unit and the outdoor
unit by wiring each pair of
S1, S2 and S3 on the both
side of indoor/outdoor
terminal blocks.
YES
Check the voltage between S1
and S2 on the terminal block
(TB1) of the outdoor unit which
is used to connect the indoor
unit and the outdoor unit.
198 to 264 V AC?
YES
OCH583A
29
NO
Symptoms: Nothing is displayed on the remote controller. 2
Diagnosis flow
Cause
LED display of the indoor
controller board
LED1 :
LED2 :
LED3 :
or
Inspection method and
troubleshooting
Check the voltage between S1 and S2 on the terminal block (TB1)
of the indoor unit which is used to connect the indoor unit and the
outdoor unit.
NO
198 to 264 V AC?
YES
Not lighting.
Check the status
of the indoor controller
board LED3 display.
Check the looseness or disconnection
of the indoor/outdoor connecting wire.
Blinking.
Are there looseness or
disconnection of the indoor/
outdoor connecting wire?
YES
NO
• Breaking or poor contact • Fix the breaking or poor
of the indoor/outdoor contact of the indoor/outdoor
connecting wire
connecting wire.
Check the refrigerant address of
the outdoor unit. (SW1-3 to 1-6)
NO
Is the refrigerant
address “0”?
YES
Check the LED display of the
outdoor unit after turning on the
main power again.
Not displayed.
Is anything displayed?
Displayed.
Is “EA” or “Eb”
displayed?
• Normal.
Only the unit which
has the refrigerant
address “0” supplies
power to the remote
controller.
• Set the refrigerant
address to “0”. In case of
the multiple grouping
system, recheck the
refrigerant address again.
• Defective outdoor
controller circuit
board
• Replace the outdoor
controller circuit board.
• Defective outdoor
controller circuit
board
• Replace the outdoor
controller circuit board.
• Defective indoor
controller board
• Replace the indoor controller
board of the indoor unit which
does not operate.
NO
YES
Is “E8” displayed?
YES
NO
Can the unit be restarted?
NO
Can all the indoor
unit be operated?
Check the voltage between S2
and S3 on the terminal block of
the outdoor unit.
17 to 28 V DC?
YES
• Influence of
• Not abnormal.
electromagnetic noise There may be the influence
of electromagnetic noise.
Check the transmission wire
and get rid of the causes.
NO
YES
OCH583A
30
• Defective outdoor
power circuit board
• Replace the outdoor
power circuit board.
• Defective indoor
power board
• Replace the indoor
power board.
Symptoms: Nothing is displayed on the remote controller. 3
Diagnosis flow
Cause
LED display of the indoor
controller board
LED1 :
LED2 :
or
LED3 : —
Inspection method and
troubleshooting
Check the voltage of the
terminal block of
the indoor controller.
10 to 16 V DC?
YES
• Defective
remote controller
• Replace the
remote controller.
NO
Check the status
of the LED2.
Lighting
• Breaking or poor
• Check if there is breaking
contact of the remote or poor contact of the
controller wire
remote controller wire.
Check the voltage of the
terminal block connecting
the remote controller wire.
If it is not between 10 and
16 V DC, the indoor
controller board must be
defective.
Blinking
Check the status of the LED2
after disconnecting the remote
controller wire from the terminal
block of the indoor unit.
Check the status
of the LED2.
Lighting
• The remote controller • Check if the remote
wire short-circuits
controller wire is
short-circuited.
Blinking
• Defective indoor
controller board
OCH583A
31
• Replace the indoor
controller board.
• Before repair
Frequent calling from customers
Phone Calls From Customers
How To Respond
Note
Unit does 1 The operating display of remote 1 Check if power is supplied to air conditioner.
not operate
controller does not come on.
Nothing appears on the display unless power is
at all.
supplied.
2 Unit cannot be restarted for a 2 Wait around 3 minutes to restart unit.
while after it’s stopped.
The air conditioner is in a state of being protected
by the microcomputer’s directive. Once the
compressor is stopped, the unit cannot be
restarted for 3 minutes. This control is also applied
when the unit is turned on and off by remote
controller.
3 Check code appears and blinks 3 Check code will be displayed if any protection
devices of the air conditioner are actuated.
on the display of remote
What is check code?
controller.
Remote
controller
1 “PLEASE WAIT” is displayed
on the screen.
1 Wait around 2 minutes.
An automatic startup test will be conducted for
2 minutes when power is supplied to the air
conditioner. “PLEASE WAIT” will be kept displayed
during that time.
2 “STANDBY” is displayed on the 2This is displayed when the unit starts HEAT
screen.
operation, when the thermostat puts the
compressor in operation mode, or when the
outdoor unit ends DEFROST operation and
returns to HEAT operation.
The display will automatically disappear around
10 minutes later.
While “STANDBY” is displayed on the remote
controller, the airflow amount will be restricted
because the indoor unit’s heat exchanger is not
fully heated up. In addition to that, the up/down
vane will be automatically set to horizontal blow
in order to prevent cold air from directly blowing
out to human body. The up/down vane will return
to the setting specified by the remote controller
when “STANDBY” is released.
3 The outdoor unit gets frosted when the outside
3 “DEFROST” is displayed on
temperature is low and the humidity is high.
the screen. (No air comes out of
“DEFROST” indicates the DEFROST
the unit.)
operation is being performed to melt this frost. The
DEFROST operation ends in around 10 minutes
(at most 15 minutes).
During the DEFROST operation, the indoor unit’s
heat exchanger becomes cold, so the fan is
stopped. The up/down vane will be automatically
set to horizontal blow in order to prevent cold air
from directly blowing out to human body. The
display will turn into “STANDBY” when DEFROST
operation ends.
OCH583A
32
Refer to “SELF-DIAGNOSIS
ACTION TABLE”.
Check if servicing is
required for the error.
Phone Calls From Customers
How To Respond
The room cannot be cooled or heated sufficiently. 1 Check the set temperature of remote controller.
The outdoor unit cannot be operated if the set
temperature is not appropriate.
The outdoor unit operates in the following modes.
COOL: When the set temperature is lower
than the room temperature.
HEAT: When the set temperature is higher
than the room temperature.
Sound
1 A gas escaping sound is heard
comes out
sometimes.
from the air
conditioner.
2 A cracking sound is heard
sometimes.
2 Check there is enough space around the air
conditioner.
If there are any obstacles in the air intake or air
outlet of indoor/outdoor units, they block the
airflow direction so that the unit capacity will be
lowered.
1 This is not a malfunction.
This is the sound which is heard when the flow of
refrigerant in the air conditioner is switched.
2 This is not a malfunction.
This is the sound which is heard when internal
parts of units expand or contract when the
temperature changes.
3 A buzzing sound is heard
sometimes.
3 This is not a malfunction.
This is the sound which is heard when the outdoor
unit starts operating.
4 A ticking sound is heard from
the outdoor unit sometimes.
4 This is not a malfunction.
This is the sound which is heard when the fan of
the outdoor unit is controlling the airflow amount
in order to keep the optimum operating condition.
5 A sound, similar to water
flowing, is heard from the unit.
5 This is not a malfunction.
This is the sound which is heard when the
refrigerant is flowing inside the indoor unit.
A white mist is expelled from the indoor unit.
This is not a malfunction.
This may occur when the operation gets started in
the room of high humidity.
Water or moisture is expelled from the outdoor
unit.
COOL: when pipes or piping joints are cooled, they
get sweated and water drips down.
HEAT: water drips down from the heat exchanger.
Note: Make use of optional parts “Drain Socket” and
“Drain pan” if these water needs to be collected
and drained out for once.
The display of wireless remote controller gets dim Batteries are being exhausted. Replace them and
or does not come on.
press the reset button of remote controller.
The indoor unit does not receive a signal from
remote controller at a long distance.
OCH583A
33
Note
10-4. HOW TO CHECK THE PARTS
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Parts name
Thermistor (TH3)
<Liquid>
Thermistor (TH6)
<2-phase pipe>
Thermistor (TH7)
<Ambient>
Thermistor (TH8)
<Heat sink>
Thermistor (TH32)
<Comp. Surface>
Check points
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 10 to 30°C)
Normal
TH32
Abnormal
160 to 410 k"
TH3
TH6
Open or short
4.3 to 9.6 k"
TH7
TH8
39 to 105 k"
Fan motor(MF1,MF2) Refer to the next page.
Solenoid valve coil
<4-way valve>
(21S4)
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20°C)
Normal
Abnormal
1215 ± 122 "
Open or short
Motor for compressor Measure the resistance between the terminals with a tester.
U
(Winding temperature 20°C)
(MC)
V
W
Normal
Abnormal
Refer to “5-2. COMPRESSOR TECHNICAL DATA”.
Open or short
Linear expansion valve Disconnect the connector then measure the resistance with a tester.
(LEV-A)
(Winding temperature 20°C)
M
Gray
Orange
Red
Yellow
Black
1
2
3
4
5
OCH583A
Normal
Gray - Black
Gray - Red
Gray - Yellow
46 ± 3 "
34
Abnormal
Gray - Orange
Open or short
Check method of DC fan motor (fan motor/outdoor controller circuit board)
1 Notes
· High voltage is applied to the connecter (CNF1, 2) for the fan motor. Pay attention to the service.
· Do not pull out the connector (CNF1, 2) for the motor with the power supply on.
(It causes trouble of the outdoor controller circuit board and fan motor.)
2 Self check
Symptom : The outdoor fan cannot rotate.
Fuse check
Check the fuse (F5) on outdoor
controller circuit board.
Replace the outdoor controller circuit board
(C.B) and fan motor (MF1, 2).
Yes
Did the fuse blow?
No
Wiring contact check
Contact of fan motor connector (CNF1, 2)
Recover wiring.
Yes
Is there contact failure?
No
Power supply check (Remove the connector (CNF1, 2))
Measure the voltage in the outdoor controller circuit board.
TEST POINT 1 : VDC (between 1 (+) and 4 (−) of the fan connector): VDC 250–330 V DC
TEST POINT 2 : VCC (between 5 (+) and 4 (−) of the fan connector): VCC 15 V DC
Is the voltage normal?
Replace the fan motor.
Yes
Yes
No
OK
Check the operation of fan.
Replace the outdoor
controller circuit board.
END
Fail
Replace the outdoor controller circuit board.
OK
Check the operation.
END
Fail
Replace the fan motor.
10-5. HOW TO CHECK THE COMPONENTS
<HIGH PRESSURE SENSOR>
Vout (V)
MULTI
CONTROLLER BOARD
4.5
WHT
SENSOR
2.5
Vout BLU
2
BLK
1
63HS
0.5
2.5
OCH583A
5 V DC
3
5
3-1 : 5 V (DC)
2-1 : Output Vout (DC)
PRESSURE
(MPa)
35
MICRO
PROCESSOR
GND
<Thermistor feature chart>
50
Low temperature thermistors
• Thermistor <Liquid> (TH3)
• Thermistor <2-phase pipe> (TH6)
• Thermistor <Ambient> (TH7)
Resistance (k")
40
Thermistor R0 = 15 k" ± 3%
B constant = 3480 ± 2%
Rt =15exp{3480(
0:
10:
20:
25:
15
9.6
6.3
5.2
k"
k"
k"
k"
1
1
)}
–
273+t 273
30:
4.3 k"
40:
3.0 k"
30
20
10
0
-20 -10 0 10 20 30 40 50
Temperature (:)
200
Medium temperature thermistor
• Thermistor <Heat sink> (TH8)
Thermistor R50 = 17 k" ± 2%
B constant = 4150 ± 3%
Resistance (k")
150
1
1
Rt =17exp{4150( 273+t – 323)}
0: 180 k"
25: 50 k"
50: 17 k"
70:
8 k"
90:
4 k"
100
50
0
• Thermistor <Comp. Surface> (TH32)
Resistance (k")
1
1
Rt =7.465exp{4057( 273+t – 393)}
k"
k"
k"
k"
k"
70:
34 k"
80:
24 k"
90: 17.5 k"
100: 13.0 k"
110: 9.8 k"
300
200
100
0
OCH583A
125
400
Thermistor R120 = 7.465 k" ± 2%
B constant = 4057 ± 2%
250
160
104
70
48
50
75
100
Temperature (:)
500
High temperature thermistor
20:
30:
40:
50:
60:
25
36
25
50
75
Temperature (:)
100
120
Linear expansion valve
(1) Operation summary of the linear expansion valve
• Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the outdoor controller circuit board.
• Valve position can be changed in proportion to the number of pulse signal.
<Connection between the outdoor controller board and the linear expansion valve>
Outdoor controller board
12 V DC
Gray
LEV
1
Drive circuit
3
6
M
2
1
5
4
Orange 2
[4
3
[3
[2
Yellow 4
[2
[1
Black
5
[1
[4
[3
Red
Connector LEV-A
<Output pulse signal and the valve operation>
Output
(Phase)
Output
1
2
3
5
4
6
7
8
[1
ON ON OFF OFF OFF OFF OFF ON
[2
OFF ON
[3
OFF OFF OFF ON
[4
OFF OFF OFF OFF OFF ON ON ON
ON ON OFF OFF OFF OFF
ON ON OFF OFF
(2) Linear expansion valve operation
Valve position (capacity)
C
Close
Opening a valve : 8 → 7 → 6 → 5 → 4 → 3 → 2 → 1 → 8
Closing a valve : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 1
The output pulse shifts in above order.
· When linear expansion valve operation stops, all output phases
become OFF.
· When the switch is turned on, 700 pulse closing valve signal will
be sent till it goes to A point in order to define the valve position.
(The pulse signal is being sent for about 20 seconds.)
When the valve moves smoothly, there is no sound or vibration
occurring from the linear expansion valve : however, when the
pulse number moves from B to A or when the valve is locked,
more sound can be heard.
No sound is heard when the pulse number moves from B to A in
case coil is burnt out or motor is locked by open-phase.
Open
· Sound can be detected by placing the ear against the screw driver handle while putting the screw driver to the linear expansion
valve.
500 pulse
Opening a valve
all the way
A
B
Pulse number
Extra tightening (about 32 pulse)
OCH583A
37
(3) How to attach and detach the coil of linear expansion valve
<Composition>
Linear expansion valve is separable into the main body and the coil as shown in the diagram below.
Stopper
Main body
Coil
Lead wire
<How to detach the coil>
Hold the lower part of the main body (shown as A) firmly so that
the main body does not move and detach the coil by pulling it
upward.
Be sure to detach the coil holding main body firmly. Otherwise
pipes can bend due to pressure.
A
<How to attach the coil>
Hold the lower part of the main body (shown as A) firmly so that
the main body does not move and attach the coil by inserting it
downward into the main body. Then securely attach the coil stopper to main body. (At this time, be careful that stress is not added
to lead wire and main body is not wound by lead wire.) If the
stopper is not firmly attached to main body, coil may be detached
from the main body and that can cause defective operation of linear expansion valve.
To prevent piping stress, be sure to attach the coil holding the
main body of linear expansion valve firmly. Otherwise pipe may
break.
Be sure to attach
the stopper.
A
OCH583A
38
10-6. TEST POINT DIAGRAM
Outdoor controller circuit board
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<CAUTION> TEST POINT1 is high voltage.
SW1
Manual defrost,
detect history
record reset,
refrigerant address
SW7
Demand control setting
CNDM
1 to 2: Input of low-level sound priority mode
1 to 3: Input of external contact point
CN51
External signal output
• Compressor operating signal
• Abnormal signal
SW6
Model select
SW4
Test operation
SWP
Pump down
SW5
Function switch
SW8
Pipe replace
Wiring replace
CN4
CNM
Transmission to outdoor power circuit
board (CN4)
Connect to A control
service tool
21S4
4-way valve
LEV-A
Linear expansion valve
63H
High pressure switch
CN2
Connect to the outdoor
power circuit board (CN2)
1–5: Reception from
power circuit board
2–5: Zero cross signal
(0–5 V DC)
3,4: Not used
6–5: 16 V DC
7–5: 16 V DC
TH3
Thermistor
<Liquid>
TH7/6
Thermistor
<Ambient/
2-phase pipe>
TH32
Thermistor
<Comp. Surface>
CNAC
2 to 4: Power supply for
outdoor controller
circuit board
(230 V AC)
1 to 3: Power supply for
indoor and
outdoor unit
connection wire
(230 V AC)
VFG
(Voltage between
right pins of PC5C
and PC5D, pin 3
and pin 4)
(Same as
(CNF17(+)-4(−))
VSP
(Voltage between pins of
C5A, C5B):
0 V DC (when stopped),
1– 6.5 V DC (when operated)
OCH583A
CNS
CNF1, CNF2
Connect to the fan motor
1–4: 250–330 V DC
5–4: 15 V DC
6–4: 0–6.5 V DC
7–4: 15 V DC (When stopped)
7.5 V DC (When operated)
(0–15 V pulse)
S1-S2: 230 V AC
CNDC
250–330 V DC
(1+, 3−)
Noise filter circuit board
39
+ −
Communication power supply
D71 Voltage
24 V DC
Outdoor noise filter circuit board
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LI1, LI2, LI3, NI
POWER SUPPLY
LI1-LI2/LI-LI3/LI3-LI1 : 400 V AC input
LI1-NI/LI2-NI/LI3-NI : 230 V AC input
(Connect to the terminal block (TB1))
CNAC1, CNAC2
230 V AC
(Connect to the
outdoor controller
circuit board (CNAC))
GD1
Connect to the earth
GD2
Connect to the earth
CNDC
(Connect to the
outdoor controller
circuit board
(CNDC))
CNCT
Primary current
CNL
Connect to the ACL4
OCH583A
LO1, LO2, LO3
POWER SUPPLY
LO1-LO2/LO2-LO3/LO3-LO1 : 400 V AC OUTPUT
Connect to the outdoor power circuit board (TB-L1, L2, L3)
40
(Connect to the
outdoor power
circuit board (CN5))
Outdoor power circuit board
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PUHZ-SW200YKA-BS.UK
PUHZ-SW200YKAR1-BS.UK
Brief Check of POWER MODULE
Usually, they are in a state of being short-circuited if they are broken.
Measure the resistance in the following points (connectors, etc.).
If they are short-circuited, it means that they are broken.
1. Check of DIODE MODULE
L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1
2. Check of DIP-IPM
P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W
Note: The marks L1 , L2 , L3 , N1 , N2 , P1 , P2 , U , V and W
shown in the diagram are not actually printed on the board.
TB-U, TB-V, TB-W
TB-P3
Connect to the compressor (MC)
Voltage among phases:
10–400 V AC
Connect to the DCL
Diode module
N2
W
V
U
P2
TB-P1
DIP-IPM
Connect to the DCL
TAB connector
on X52CA
P1
Connect to the
RS resistor
L1
L2
L3
N1
TB-L1
TB-L2
TB-L3
Connect to the outdoor
noise filter circuit board
(LO1, LO2, LO3)
400 V AC
L3OUT-L3IN
Lead connect
CN4
CN5
Connect to the
outdoor controller
circuit board (CN4)
Detection of primary
current (Connect to
the outdoor noise filter
circuit board (CNCT))
CN6
Thermistor
<Heat sink> (TH8)
CN2
Connect to the outdoor controller circuit board (CN2)
1–5: Power circuit board → Transmitting
signal to the controller board (0–5 V DC)
2–5: Zero cross signal (0–5 V DC)
3–4: Not used
5 : – 6–5: 16 V DC
1, 2, 6, 7 : +
7–5: 16 V DC
OCH583A
41
10-7. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS
The black square ( ) indicates a switch position.
(1) Function of switches
Type of
Switch No.
Switch
DIP
switch
Function
1
Manual defrost *1
2
Abnormal history clear
3
SW1
4
Refrigerant address
setting
5
DIP
switch
SW8
SW9
SW6
SW5
ON
1 2 3 4 5 6
0
ON
Normal
OFF
Normal
OFF
ON
1 2 3 4 5 6
1
Default
setting
Effective timing
When compressor is working
in heating operation. *1
off or operating
ON
1 2 3 4 5 6
2
1 2 3 4 5 6
3
ON
OFF
When power supply is
ON
1 2 3 4 5 6
5
No function
No function
—
—
—
—
OFF
OFF
—
—
Pump down
Start
Normal
—
Under suspension
1
No function
—
—
OFF
—
2
Power failure
automatic recovery *2
Auto recovery
No auto recovery
OFF
When power supply ON
3,4,5
No function
—
—
OFF
—
—
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
—
Always
—
Always
Always
—
Always
—
—
—
—
—
—
As
shown
in the
left table
—
SWP
SW7*4
Clear
1 2 3 4 5 6
4
1
2
SW4
SW5
Start
ON
6
Push
switch
Action by the switch operation
ON
OFF
6
Model select
Following SW5-6 reference
1
Mode select *3
Demand function
Low noise mode
2
No function
—
—
3 Max Hz setting (cooling) Max Hz (cooling) o 0.8
Normal
4 Max Hz setting (heating) Max Hz (heating) o 0.8
Normal
5
No function
—
—
6
Defrost setting
For high humidity
Normal
1
No function
—
—
2
No function
—
—
3
No function
—
—
1
No function
—
—
2
No function
—
—
3,4
No function
—
—
1
The black square (■) indicates a switch position.
MODEL
SW6
SW5-6 *5
2
3
ON
ON
PUHZ-SW160YKA OFF
OFF
4
1 2 3 4 5 6 7 8
1 2 3 4 5 6
Model select
5
ON
ON
6
PUHZ-SW200YKA OFF
OFF
1 2 3 4 5 6 7 8
1 2 3 4 5 6
7
8
6
*1 Manual defrost should be done as follows.
1 Change the DIP SW1-1 on the outdoor controller board from OFF to ON.
2 Manual defrost will start by the above operation 1 if all these conditions written below are satisfied.
• Heat mode setting
• 10 minutes have passed since compressor started operating or previous manual defrost is finished.
• Pipe temperature is less than or equal to 8°C.
Manual defrost will finish if certain conditions are satisfied.
Manual defrost can be done if above conditions are satisfied when DIP SW1-1 is changed from OFF to ON.
After DIP SW1-1 is changed from OFF to ON, there is no problem if DIP SW1-1 is left ON or changed to OFF again.
This depends on the service conditions.
*2 ‘Power failure automatic recovery’ can be set by either remote controller or this DIP SW. If one of them is set to ON, ‘Auto
recovery’ activates. Please set “Auto recovery” basically by remote controller because all units do not have DIP SW.
Please refer to the indoor unit installation manual.
*3 SW7-1 is setting change over of Demand/Low noise. It is effective only in case of external input.
(Local wiring is necessary. Refer to the next page: Special function)
*4 Please do not use SW7-3 to 7-6 usually. Trouble might be caused by the usage condition.
*5 SW5-1 to 5: Function switch
OCH583A
42
Special function
(a) Low-level sound priority mode (Local wiring)
By performing the following modification, operation noise of the outdoor unit can be reduced by about 3-4 dB.
The low noise mode will be activated when a commercially available timer or the contact input of an ON/OFF switch is added to
the CNDM connector (option) on the control board of the outdoor unit.
•The ability varies according to the outdoor temperature and conditions, etc.
1Complete the circuit as shown when using the external input adapter (PAC-SC36NA-E). (Option)
2SW7-1 (Outdoor unit control board): OFF
3SW1 ON: Low noise mode
SW1 OFF: Normal operation
A
C
X
F
X
Brown
SW1
B
OCH583A
D
Orange
Red
CNDM
1
3
ACircuit diagram example
(low noise mode)
BOn-site arrangement
CExternal input adapter
(PAC-SC36NA-E)
E
43
X: Relay
DOutdoor unit control board
EMaximum 10 m
FPower supply for relay
<Display function of inspection for outdoor unit>
The blinking patterns of both LED1 (green) and LED2 (red) indicate the types of abnormality when it occurs. Types of
abnormality can be indicated in details by connecting an optional part ‘A-Control Service Tool (PAC-SK52ST)’ to connector
CNM on outdoor controller board.
[Display]
(1)Normal condition
Unit condition
When the power is turned on
When unit stops
When compressor is warming up
When unit operates
Outdoor controller board
A-Control Service Tool
LED1 (Green)
LED2 (Red)
Check code
Lighted
Lighted
Lighted
Lighted
Lighted
Not lighted
Not lighted
Lighted
00, etc.
08, etc.
C5, H7, etc.
Indication of the display
Alternately blinking display
Operation mode
(2)Abnormal condition
Indication
Outdoor controller board
LED1 (Green) LED2 (Red)
1 blinking 2 blinking
Error
Contents
Connector (63H) is open.
2 blinking 1 blinking Miswiring of indoor/outdoor unit conne-
cting wire, excessive number of indoor
units (4 units or more)
Miswiring of indoor/outdoor unit connecting wire (converse wiring or disconnection)
Startup time over
2 blinking Indoor/outdoor unit communication error
(signal receiving error) is detected by indoor unit.
Indoor/outdoor unit communication error
(transmitting error) is detected by indoor
unit.
Indoor/outdoor unit communication error
(signal receiving error) is detected by
outdoor unit.
Indoor/outdoor unit communication error
(transmitting error) is detected by outdoor
unit.
3 blinking Remote controller signal receiving
error is detected by remote controller.
Remote controller transmitting error
is detected by remote controller.
Remote controller signal receiving
error is detected by indoor unit.
Remote controller transmitting error
is detected by indoor unit.
4 blinking Check code is not defined.
Check
code
*1
Inspection method
1Check if connector (63H) on the outdoor controller board is
not disconnected.
2Check continuity of pressure switch (63H) by a tester.
P.18
— 1Check if indoor/outdoor connecting wire is connected correctly.
P.19
—
P.19
(EC)
P.25
F5
2Check if 4 or more indoor units are connected to outdoor unit. (EA)
— 3Check if noise entered into indoor/outdoor connecting
P.19
wire or power supply.
(Eb)
4Re-check error by turning off power, and on again.
E6 1Check if indoor/outdoor connecting wire is connected correctly.
2Check if noise entered into indoor/outdoor connecting wire or
E7 power supply.
3Check if noise entered into indoor/outdoor controller board.
4Re-check error by turning off power, and on again.
—
—
E0 1Check if connecting wire of indoor unit, or remote
controller is connected correctly.
2Check
if noise entered into transmission wire of remote
E3
controller.
3Re-check error by turning off power, and on again.
<Communication between outdoor
controller board and outdoor power
board>
P.25
(E8)
P.26
(E9)
P.24
P.25
P.24
E5
P.25
EF 1Check if the remote controller is compatible.
P.26
PL 1Be sure to replace the 4-way valve.
P.26
Ed 1Check if connector (CN4) on outdoor controller board and
P.26
2Check if noise entered into transmission wire of remote controller.
3Check if noise entered into indoor/outdoor connecting wire.
4Re-check error by turning off power, and on again.
outdoor power board is not disconnected.
*1 Check code displayed on remote controller
*2 Refer to the service manual of indoor unit.
OCH583A
P.25
E4
2Check refrigerant pipes for disconnection or leakage.
3After the recovery of refrigerant, vacuum dry the whole
refrigerant circuit.
4Check refrigerant circuit for operation.
5 blinking Serial communication error
Detailed
reference
page
44
Indication
Outdoor controller board
LED1 (Green) LED2 (Red)
Error
Check
Contents
Inspection method
code
*1
3 blinking 1 blinking Abnormality of comp. surface U2 1Check if stop valves are open.
2Check if connectors (TH32 and LEV-A) on outdoor controller
thermistor(TH32)
board are not disconnected.
3Check if unit is filled with specified amount of refrigerant.
4Measure resistance values among terminals on indoor valve and
outdoor linear expansion valve using a tester.
2 blinking Abnormal high pressure (High U1 1Check if indoor/outdoor units have a short cycle on their air ducts.
2Check if connector (63H) on outdoor controller board is not disconnected.
pressure switch 63H operated.)
3Check if heat exchanger and filter is not dirty.
4Measure resistance values among terminals on linear expansion valve
using a tester.
3 blinking Abnormality of outdoor fan
motor rotational speed
Protection from overheat operation(TH3)
4 blinking Compressor overcurrent
breaking(Start-up locked)
Compressor overcurrent breaking
Abnormality of current sensor (P.B.)
Abnormality of power module
5 blinking Open/short of comp. surface
thermistor (TH32)
P.20
Ud
UF 1Check if stop valves are open.
P.23
P.23
U6
U3 1Check if connectors(TH3, TH6,TH7 and TH32)on outdoor controller
P.24
P.23
P.21
P.20
2Check looseness, disconnection, and converse connection of
compressor wiring.
UP 3Measure resistance values among terminals on compressor using a tester.
4Check if outdoor unit has a short cycle on its air duct.
UH 5Check leakage of refrigerant.
board and connector (CN3) on outdoor power board are not disconnected.
2Measure resistance value of outdoor thermistors.
P.21
U5 1Check if indoor/outdoor units have a short cycle on their air ducts.
P.21
U9 1Check looseness, disconnection, and converse connection of
P.22
2Measure resistance value of outdoor thermistor(TH8).
compressor wiring.
2Measure resistance value among terminals on compressor using a tester.
3Check if power supply voltage decreases.
4Check the wiring of CN52C.
Abnormality of pipe temperature
P9
thermistor/condenser-evaporator/
or tank water temperature thermistor
*2
*2
*2
1Check if connectors or terminal blocks on indoor controller board is not
disconnected.
2Measure resistance value of indoor thermistors.
3Measure resistance value among terminals on drain pump using
Indoor drain overflow protection P5
a tester.
4Check if drain pump works.
5Check drain function.
1Check if indoor unit has a short cycle on its air duct.
3 blinking Freezing (cooling)/overheating
2Check if heat exchanger and filter is not dirty.
(heating) protection
P6 3Measure resistance value on indoor and outdoor fan motors.
4Check if the inside of refrigerant piping is not clogged.
P4
*1 Check code displayed on remote controller
*2 Refer to the service manual of indoor unit.
OCH583A
-
P.21
2Check if connector (TH3) on outdoor controller board is disconnected.
4 blinking 1 blinking Abnormality of room temperature
P1 1Check if connectors or terminal blocks on indoor controller board are not
disconnected.
thermistor (TH1)
2Measure resistance value of indoor thermistors.
Abnormality of pipe temperature
P2
thermistor /Liquid (TH2)
2 blinking Abnormality of drain sensor (DS)
Float switch(FS) connector open
P.20
U8 1Check the outdoor fan motor.
Open/short of outdoor thermistors U4
(TH3, TH6, TH7 and TH8)
6 blinking Abnormality of heat sink
temperature
7 blinking Abnormality of voltage
Detailed
reference
page
45
*2
*2
<Outdoor unit operation monitor function>
[When optional part ‘A-Control Service Tool (PAC-SK52ST)’ is connected to outdoor controller board (CNM)]
Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of check code by
controlling DIP SW2 on ‘A-Control Service Tool’.
Operation indicator
SW2 : Indicator change of self diagnosis
Explanation for display
Display detail
SW2 setting
Unit
ON
1 2 3 4 5 6
<Digital indicator LED1 working details>
(Be sure that the 1 to 6 in the SW2 are set to OFF.)
(1) Display when the power supply ON
When the power supply ON, blinking displays by turns.
Wait for 4 minutes at the longest.
(2) When the display lights (Normal operation)
1 Operation mode display.
1 second
interval
SW2
(Lighting)
ON
LED1
(Initial setting)
1 2 3 4 5 6
The ones digit : Relay output
The tens digit : Operation mode
Display
Operation Model
O
C
H
d
OFF / FAN
COOLING
HEATING
DEFROSTING
2 Display during error postponement
Postponement code is displayed when
compressor stops due to the work of
protection device.
Postponement code is displayed while
error is being postponed.
Display
Warming-up
Compressor
Compressor
4-way valve
Solenoid valve
0
1
2
3
4
5
6
7
8
A
—
—
—
—
—
—
—
—
ON
ON
—
—
—
—
ON
ON
ON
ON
—
—
—
—
ON
ON
—
—
ON
ON
—
ON
—
ON
—
ON
—
ON
—
ON
—
—
(3) When the display blinks
Inspection code is displayed when compressor stops due to the work of protection devices.
Display
0
1
Display
F5
E8
E9
EA
Eb
EC
E0–E7
Inspection unit
Outdoor unit
Indoor unit 1
Display
U1
U2
U3
U4
U5
U6
U8
Ud
UF
UH
UL
UP
PL
P1–P8
Contents to be inspected (During operation)
Abnormal high pressure (63H operated)
Abnormal high discharge temperature and comp. surface thermistor, shortage of refrigerant
Open/short circuit of comp. surface thermistor(TH32)
Open/short of outdoor unit thermistors (TH3, TH6, TH7 and TH8)
Abnormal temperature of heat sink
Abnormality of power module
Abnormality in outdoor fan motor
Overheat protection
Compressor overcurrent interruption (When Comp. locked)
Current sensor error
Abnormal low pressure
Compressor overcurrent interruption
Abnormality of refrigerant
Abnormality of indoor units
Contents to be inspected (When power is turned on)
63H connector(yellow) is open.
Indoor/outdoor communication error (Signal receiving error) (Outdoor unit)
Indoor/outdoor communication error (Transmitting error) (Outdoor unit)
Miswiring of indoor/outdoor unit connecting wire, excessive number of indoor units (4 units or more)
Miswiring of indoor/outdoor unit connecting wire(converse wiring or disconnection)
Startup time over
Communication error except for outdoor unit
OCH583A
46
The black square ( ) indicates a switch position.
SW2 setting
ON
Explanation for display
Display detail
Pipe temperature/Liquid (TH3)
−40 to 90
−40 to 90
(When the coil thermistor detects 0: or below, “–”
and temperature are displayed by turns.)
(Example) When −10:;
0.5 s
0.5 s
2s
1 2 3 4 5 6
−
ON
1 2 3 4 5 6
ON
:
10
−52 to 221
(When the discharge thermistor detects 100: or
more, hundreds digit, tens digit and ones digit are
displayed by turns.)
(Example) When 105:;
0.5 s
0.5 s
2s
1
05
Comp. surface temperature (TH32)
−52 to 221
Unit
:
Output step of outdoor FAN
0 to 10
0 to 10
The number of ON / OFF times of compressor
0 to 9999
0 to 9999
(When the number of times is 100 or more,
hundreds digit, tens digit and ones digit are
displayed by turns.)
(Example) When 42500 times (425 ×100 times);
0.5 s
0.5 s
2s
4
25
100 times
0 to 9999
(When it is 100 hours or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
(Example) When 2450 hours (245 ×10 hours);
0.5 s
0.5 s
2s
2
45
10 hours
Step
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
Compressor integrating operation times
0 to 9999
1 2 3 4 5 6
ON
Compressor operating current
0 to 50
0 to 50
(Omit the figures after the decimal fractions.)
Compressor operating frequency
0 to 255
0 to 255
(When it is 100Hz or more, hundreds digit, tens
digit and ones digit are displayed by turns.
(Example) When 125Hz;
0.5 s
0.5 s
2s
1
25
A
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
0 to 480
(When it is 100 pulse or more, hundreds digit, tens
digit and ones digit are displayed by turns.
(Example) When 150 pulse;
0.5 s
0.5 s
2s
1
50
LEV-A opening pulse
0 to 480
1 2 3 4 5 6
ON
Error postponement code history (1)
of outdoor unit
Postponement code display
Blinking: During postponement
Lighting: Cancellation of postponement
“00” is displayed in case of no postponement.
Operation mode on error occurring
Operation mode of when operation stops due to
error is displayed by setting SW2 like below.
1 2 3 4 5 6
ON
(SW2)
1 2 3 4 5 6
ON
1 2 3 4 5 6
OCH583A
47
Hz
Pulse
Code
display
Code
display
The black square ( ) indicates a switch position.
ON
Pipe temperature/Liquid (TH3) on error
occurring
−40 to 90
−40 to 90
(When the coil thermistor detects 0: or below, “–”
and temperature are displayed by turns.)
(Example) When −15:;
0.5 s
0.5 s
2s
15
Comp. surface temperature (TH32) on
error occurring
−52 to 221
−52 to 221
(When the temperature is 100: or more, the
hundreds digit, tens digit and ones digit are
displayed by turns.)
(Example) When 130:;
0.5 s
0.5 s
2s
1 2 3 4 5 6
ON
Explanation for display
Display detail
SW2 setting
1 2 3 4 5 6
1
ON
Unit
:
:
30
Compressor operating current on error
occurring
0 to 50
0 to 50
Error history (1) (latest)
Alternate display of abnormal unit
number and code
When no error history,
“ 0 ” and “– –” are displayed by turns.
Error history (2)
Alternate display of error unit number
and code
When no error history,
“ 0 ” and “– –” are displayed by turns.
Thermostat ON time
0 to 999
0 to 999
(When it is 100 minutes or more, the hundreds digit,
tens digit and ones digit are displayed by turns.)
(Example) When 245 minutes;
0.5 s
0.5 s
2s
2
45
A
1 2 3 4 5 6
ON
Code
display
1 2 3 4 5 6
ON
Code
display
1 2 3 4 5 6
ON
1 2 3 4 5 6
Test run elapsed time
0 to 120
OCH583A
0 to 120
(When it is 100 minutes or more, the hundreds digit,
tens digit and ones digit are displayed by turns.)
(Example) When 105 minutes;
0.5 s
0.5 s
2s
1
05
48
Minute
Minute
The black square ( ) indicates a switch position.
SW2 setting
Explanation for display
Display detail
The number of connected indoor units
ON
0 to 4
(The number of connected indoor units are displayed.)
Unit
Unit
1 2 3 4 5 6
Capacity setting display
Displayed as an outdoor capacity code.
Capacity
SW160YKA
SW200YKA
ON
Code
40
50
1 2 3 4 5 6
Outdoor unit setting information
Code
display
• The tens digit (Total display for applied setting)
Setting details
Display details
ON
H·P / Cooling only
0 : H·P
Single phase / 3 phase
0 : Single phase 2 : 3 phase
• The ones digit
Setting details
1 2 3 4 5 6
1 : Cooling only
Display details
Defrosting switch 0 : Normal
Code
display
1 : For high humidity
(Example) When heat pump, 3 phase and defrosting
(normal) are set up, “20” is displayed.
ON
Indoor pipe temperature/Liquid (TH2(1))
Indoor 1
−39 to 88
−39 to 88
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
Indoor pipe temperature/Cond./Eva.
(TH5(1))
Indoor 1
−39 to 88
−39 to 88
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
Indoor pipe temperature/Liquid (TH2(2))
Indoor 2
−39 to 88
−39 to 88
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
Indoor pipe temperature/Cond. / Eva.
(TH5(2))
Indoor 2
−39 to 88
−39 to 88
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
Indoor room temperature (TH1)
8 to 39
8 to 39
:
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
:
:
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
:
:
1 2 3 4 5 6
OCH583A
49
The black square ( ) indicates a switch position.
ON
Explanation for display
Display detail
SW2 setting
Unit
Indoor setting temperature
17 to 30
17 to 30
Outdoor pipe temperature/2-phase
(TH6)
−39 to 88
−39 to 88
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
°C
Outdoor Ambient temperature (TH7)
−39 to 88
−39 to 88
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
°C
Outdoor Heat sink temperature (TH8)
−40 to 200
−40 to 200
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
(When the thermistor detects 100: or more,
hundreds digit, tens digit and ones digit are displayed
by turns.)
°C
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
Discharge superheat SHd
0 to 255
ON
1 2 3 4 5 6
Cooling = TH32−T63HS
Heating = TH32−T63HS
Number of defrost cycles
0 to FFFE
ON
1 2 3 4 5 6
0 to 255
(When the temperature is 100°C or more, hundreds
digit, tens digit and ones digit are displayed by
turns.)
0 to FFFE (in hexadecimal notation)
(When more than FF in hex (255 in decimal), the
number is displayed in order of 163's and 162's, and
161's and 160's places.
(Example) When 5000 cycles;
0.5 s
0.5 s
2s
9
Input current of outdoor unit
ON
1 2 3 4 5 6
Description
Normal
Overvoltage error
Undervoltage error
Input current sensor error
L1-phase open error
Abnormal power synchronous signal
ON
1 2 3 4 5 6
OCH583A
50
0.1 A
04
08
300 to 750
(When it is 100 V or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
1 2 3 4 5 6
2 cycles
Display
00
01
02
Display examples for multiple errors:
Overvoltage (01) + Undervoltage (02) = 03
Undervoltage (02) + Power-sync signal error (08) = 0A
DC bus voltage
300 to 750
ON
°C
C4
0 to 500
(When it is 100 or more, hundreds digit, tens digit
and ones digit are displayed by turns.)
U9 error detail history (latest)
°C
Code
display
V
The black square ( ) indicates a switch position.
SW2 setting
ON
Explanation for display
Display detail
Error postponement code history (2)
of outdoor unit
Postponement code display
Blinking: During postponement
Lighting: Cancellation of postponement
“00” is displayed in case of no postponement.
Error postponement code history (3)
of outdoor unit
Postponement code display
Blinking: During postponement
Lighting: Cancellation of postponement
“00” is displayed in case of no postponement.
Error history (3) (Oldest)
Alternate display of abnormal unit number and code.
When no error history, “0” and “– –“ are displayed by
turns.
Error thermistor display
3:
6:
7:
8:
1 2 3 4 5 6
ON
Unit
Code
display
Code
display
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
When there is no error thermistor,
“–“ is displayed.
Outdoor pipe temperature /Liquid (TH3)
Outdoor pipe temperature /2-phase (TH6)
Outdoor Ambient temperature (TH7)
Outdoor Heat sink (TH8)
1 2 3 4 5 6
Operation frequency on error occurring
0 to 255
ON
1 2 3 4 5 6
ON
Fan step on error occurring
0 to 10
0 to 255
(When it is 100Hz or more, hundreds digit, tens digit
and ones digit are displayed by turns.)
(Example) When 125Hz;
0.5 s
0.5 s
2s
1
25
Code
display
Code
display
Hz
0 to 10
Step
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
OCH583A
Indoor room temperature (TH1) on error
occurring
8 to 39
8 to 39
Indoor pipe temperature/Liquid (TH2) on −39 to 88
error occurring
(When the temperature is 0°C or less, “–” and
−39 to 88
temperature are displayed by turns.)
(Example) When −15°C;
0.5 s
0.5 s
2s
15
Outdoor temperature/2-phase pipe (TH6) −39 to 88
(When the temperature is 0°C or less, “–” and
on error occurring
temperature are displayed by turns.)
−39 to 88
(Example) When −15°C;
0.5 s
0.5 s
2s
15
51
:
:
:
The black square ( ) indicates a switch position.
Outdoor temperature/Ambient (TH7) on
error occurring
−39 to 88
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
1 2 3 4 5 6
Cooling = TH32−T63HS
Heating = TH32−T63HS
Sub cool on error occurring SC
0 to 130
ON
1 2 3 4 5 6
Cooling = T63HS−TH3
Heating = T63HS−TH2
Thermo-on time until error stops
0 to 999
ON
−39 to 88
(When the temperature is 0°C or less, “–” and
temperature are displayed by turns.)
(Example) When −15°C;
0.5 s
0.5 s
2s
15
Outdoor temperature/Heat sink (TH8) on −40 to 200
(When the temperature is 0°C or less, “–” and
error occurring
temperature are displayed by turns.)
−40 to 200
(When the temperature is 100°C or more, hundreds
digit, tens digit and ones digit are displayed by
turns.)
Discharge superheat on error occurring
SHd
0 to 255
ON
Explanation for display
Display detail
SW2 setting
1 2 3 4 5 6
0 to 255
(When the temperature is 100°C or more, hundreds
digit, tens digit and ones digit are displayed by
turns.)
(Example) When 150°C;
0.5 s
0.5 s
2s
1
50
0 to 130
(When the temperature is 100°C or more, hundreds
digit, tens digit and ones digit are displayed by
turns.)
(Example) When 115°C;
0.5 s
0.5 s
2s
1
15
0 to 999
(When it is 100 minutes or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
(Example) When 415 minutes;
0.5 s
0.5 s
2s
4
15
Indoor pipe temperature/ Liquid (TH2 (3)) −39 to 88
(When the temperature is 0°C or less, “–” and
Indoor 3
−39 to 88
temperature are displayed by turns.)
ON
Unit
:
:
:
:
Minute
:
1 2 3 4 5 6
ON
1 2 3 4 5 6
Indoor pipe temperature/ Cond./ Eva.
(TH5 (3))
Indoor 3
−39 to 88
OCH583A
−39 to 88
(When the temperature is 0°C or less, “–” and
temperature are displayed by turns.)
When there is no indoor unit, “00” is displayed.
52
:
The black square ( ) indicates a switch position.
SW2 setting
Display detail
Unit
Explanation for display
Controlling status of compressor
operating frequency
The following code will be a help to know the
operating status of unit.
•The tens digit
Display Compressor operating frequency control
1
Primary current control
Secondary current control
2
•The ones digit (In this digit, the total number of
activated control is displayed.)
Display Compressor operating frequency control
Preventive control for excessive temp1
erature rise of discharge temperature
Preventive control for excessive temp2
erature rise of condensing temperature
4
Frosting preventing control
Preventive control for excessive temp8
erature rise of heat sink
(Example)
The following controls are activated.
LED
• Primary current control
• Preventive control for excessive temperature rise of condensing temperature
• Preventive control for excessive temperature rise of heat sink
ON
1 2 3 4 5 6
Code
display
1a
ON
Indoor pipe temperature/ Cond./ Eva.
(TH5 (4))
−39 to 88
−39 to 88
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
Time to current limit activates from compressor turns ON.
0 to 180
0 to 180
U9 error details
To be shown while error call is deferred.
°C
1 2 3 4 5 6
ON
Second
1 2 3 4 5 6
ON
Description
Normal
Overvoltage error
Undervoltage error
Input current sensor error
L1-phase open error
Abnormal power synchronous signal
1 2 3 4 5 6
Display
00
01
02
04
08
Display examples for multiple errors:
Overvoltage (01) + Undervoltage (02) = 03
Undervoltage (02) + Power-sync signal error (08) = 0A
OCH583A
53
Code
display
10-8. Request code list
Request code
Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed.
Refer to indoor unit service manual for how to use the controllers and request codes for indoor unit.
Description
Request content
(Display range)
Unit
0
Operation state
Refer to 10-8-1. Detail Contents in Request Code.
–
1
Compressor-Operating current (rms)
0–50
A
2
Compressor-Accumulated operating time
0–9999
10 hours
3
4
Compressor-Number of operation times
Comp. surface temperature (TH32)
0–9999
3–217
100 times
:
5
Outdoor unit -Liquid pipe 1 temperature (TH3)
−40–90
:
Outdoor unit: 2-phase pipe temperature (TH6) <cooling>
Condensing temperature (T63HS) <heating>
−39–88
:
9
Outdoor unit-Outside air temperature (TH7)
−39–88
:
10
Outdoor unit-Heat sink temperature (TH8)
−40–200
:
12
Discharge superheat (SHd)
0–255
:
13
Sub-cool (SC)
0–130
:
16
Compressor-Operating frequency
0–255
Hz
17
Compressor-Target operating frequency
0–255
Hz
18
Outdoor unit-Fan output step
0–10
Step
19
Outdoor unit-Fan 1 speed
(Only for air conditioners with DC fan motor)
0–9999
20
Outdoor unit-Fan 2 speed
(Only for air conditioners with DC fan motor)
0–9999
rpm
LEV (A) opening
0–500
Pulses
25
Primary current
0–50
A
26
DC bus voltage
180–370
V
Thermostat ON operating time
0–999
Remarks
6
7
8
11
14
15
rpm
21
22
23
24
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
OCH583A
Minutes
54
"0" is displayed if the air conditioner is a single-fan
type.
Request code
Request content
Description
(Display range)
Unit
–
50
51
Outdoor unit-Control state
Refer to 10-8-1.Detail Contents in Request Code.
–
52
Compressor-Frequency control state
Refer to 10-8-1.Detail Contents in Request Code.
–
53
Outdoor unit-Fan control state
Refer to 10-8-1.Detail Contents in Request Code.
–
54
Actuator output state
Refer to 10-8-1.Detail Contents in Request Code.
–
55
Error content (U9)
Refer to 10-8-1.Detail Contents in Request Code.
–
External input state (silent mode, etc.)
Refer to 10-8-1.Detail Contents in Request Code.
–
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
Outdoor unit-Capacity setting display
Refer to 10-8-1.Detail Contents in Request Code.
–
71
Outdoor unit-Setting information
Refer to 10-8-1.Detail Contents in Request Code.
–
72
73
–
74
–
75
76
–
77
–
78
–
79
–
80
–
81
–
82
–
83
84
85
86
87
88
89
90
Outdoor unit-Microprocessor version information
Examples) Ver 5.01 → "0501"
Ver
Auxiliary information (displayed after
91
Outdoor unit-Microprocessor version information (sub No.) version information)
–
Examples) Ver 5.01 A000 → "A000"
92
93
94
95
96
97
98
99
100 Outdoor unit - Error postponement history 1 (latest)
101 Outdoor unit - Error postponement history 2 (previous)
102 Outdoor unit - Error postponement history 3 (last but one)
OCH583A
Displays postponement code. (" - - " is
displayed if no postponement code is present)
Displays postponement code. (" - - " is
displayed if no postponement code is present)
Displays postponement code. (" - - " is
displayed if no postponement code is present)
55
Code
Code
Code
Remarks
Request code
Description
Request content
(Display range)
Unit
103 Error history 1 (latest)
Displays error history. (" --" is displayed if no history is present.)
Code
104 Error history 2 (second to last)
Displays error history. (" --" is displayed if no history is present.)
Code
105 Error history 3 (third to last)
Displays error history. (" --" is displayed if no history is present.)
Code
106
107
108
109
3 : TH3
6 : TH6
Abnormal thermistor display
7 : TH7
(TH3/TH6/TH7/TH8)
8 : TH8
0 : No thermistor error
Operation mode at time of error
Displayed in the same way as request code "0".
Compressor-Operating current at time of error
0–50
Compressor-Accumulated operating time at time of error 0–9999
110 Compressor-Number of operation times at time of error
111 Comp. surface temperature (TH32) at time of error
112 Outdoor unit -Liquid pipe 1 temperature (TH3) at time of error
113
Outdoor unit at time of error:
114 2-phase pipe temperature (TH6) <cooling>
Condensing temperature (T63HS) <heating>
Sensor
number
–
A
10 hours
−40–90
100 times
:
:
−39–88
:
116 Outdoor unit-Outside air temperature (TH7) at time of error −39–88
:
117 Outdoor unit-Heat sink temperature (TH8) at time of error −40–200
:
0–9999
3–217
Remarks
115
118 Discharge superheat (SHd) at time of error
0–255
119 Sub-cool (SC) at time of error
0–130
:
120 Compressor-Operating frequency at time of error
0–255
Hz
0–10
Step
121
122
123
Outdoor unit at time of error
• Fan output step
Outdoor unit at time of error
• Fan 1 speed (Only for air conditioners with DC fan)
Outdoor unit at time of error
• Fan 2 speed (Only for air conditioners with DC fan)
:
0–9999
rpm
0–9999
rpm
124
125 LEV (A) opening at time of error
0–500
Pulses
0–999
Minutes
126
127
128
129
130 Thermostat ON time until operation stops due to error
OCH583A
56
"0" is displayed if the air conditioner is a singlefan type.
10-8-1. Detail Contents in Request Code
[Operation state] (Request code :" 0")
Data display
Relay output state
Display
C
4
0
1
2
3
4
5
6
7
8
A
Relay output state
Operation mode
Operation mode
Display
0
C
H
d
Operation mode
STOP • FAN
COOL • DRY
HEAT
DEFROST
Power currently
supplied to compressor
–
Compressor
4-way valve
Solenoid valve
–
–
–
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
[Outdoor unit – Control state] (Request code :" 51")
0
0
0
Data display
0
0
0
0
0
1
0
0
2
State
Normal
Preparing for heat operation
Defrost
[Compressor – Frequency control state] (Request code :" 52")
Frequency control state 2
Data display
0
Display
0
Frequency control state 2
Frequency control state 1
Frequency control state 1
Display
0
1
2
Current limit control
No current limit
Primary current limit control is ON.
Secondary current limit control is ON.
0
1
2
3
4
5
6
7
8
9
A
b
C
d
E
F
Discharge temperature Condensation temperature
Anti-freeze
Heat sink temperature
overheat prevention
protection control overheat prevention
overheat prevention
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
[Fan control state] (Request code :" 53 ")
Data display
0
0
Fan step correction value by heat sink temperature overheat prevention control
Fan step correction value by cool condensation temperature overheat prevention control
Display
− (minus)
0
1
2
Correction value
−1
0
+1
+2
OCH583A
57
[Actuator output state] (Request code :"54")
Data display
0
0
Actuator output state 1
Actuator output state 2
Actuator output state 1
Display
SV1
0
1
ON
2
3
ON
4
5
ON
6
7
ON
8
9
ON
A
b
ON
C
d
E
F
Actuator output state 2
4-way valve
Compressor
Compressor is
warming up
ON
ON
ON
ON
ON
ON
ON
52C
0
1
ON
2
3
4
5
6
7
ON
ON
ON
ON
ON
SV2
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
[Error content (U9)] (Request code :"55 ")
Data display
0
0
Error content 1
Error content 2
Error content 1
: Detected
Overvoltage
error
Display
Undervoltage
error
L1-phase
open error
Power synchronizing
signal error
0
1
2
3
4
5
6
7
8
9
A
b
C
d
E
F
Error content 2
Display
0
1
2
3
[Outdoor unit – Capacity setting display] (Request code : "70")
Data display
40
50
Capacity
160
200
OCH583A
58
Converter Fo
error
SS
ON
ON
ON
ON
ON
ON
ON
ON
ON
Display
: Detected
PAM error
ON
ON
ON
ON
[Outdoor unit – Setting information] (Request code : "71")
Data display
0
0
Setting information 1
Setting information 2
Setting information 1
Display
Defrost mode
0
Standard
1
For high humidity
Setting information 2
Single-/
Display
3-phase
0
Single-phase
1
2
3-phase
3
OCH583A
59
Heat pump/
cooling only
Heat pump
Cooling only
Heat pump
Cooling only
11
DISASSEMBLY PROCEDURE
PUHZ-SW160YKA.UK
PUHZ-SW200YKA.UK
PUHZ-SW160YKA-BS.UK
PUHZ-SW200YKA-BS.UK
PUHZ-SW160YKAR1.UK
PUHZ-SW200YKAR1.UK
PUHZ-SW160YKAR1-BS.UK
PUHZ-SW200YKAR1-BS.UK
PHOTOS
OPERATING PROCEDURE
Photo 1
1. Removing the service panel and top panel
(1) Remove the service panel fixing screws (4 for front/ 5 x
12), then slide the service panel downward to remove it.
(The service panel is fixed to the side panel (R) with a
hook on the right side.)
(2) Remove the top panel fixing screws (3 for front and 3 for
rear/ 5 x 12) to remove the top panel.
Top panel fixing screws
Service panel
Wire
grille
fixing
screws
Note: When removing service panel and top panel at the same
time, count one less screw since they share a screw.
Top panel
Side panel (R)
Slide
Wire
grille
fixing
screws
Service panel
fixing screws
Cover panel (rear)
Cover panel (front)
fixing screws
Cover panel (front)
2. Removing the fan motor (MF1, MF2)
(1) Remove the service panel. (See Photo 1)
(2) Remove the wire grille fixing screws (4 for front/ 5 x 12),
then slide the wire grille upward to remove it. (See Photo 1)
(For the each fan motor on top and under)
(3) Remove the screw of nut (1 for front/ M6), then slide the
propeller fan forward to remove it.
(For the each fan motor on top and under)
(4) Disconnect the connectors, CNF1 (WHT) and CNF2 (WHT)
on the controller circuit board in the electrical parts box.
(See Photo 4)
(5) Loosen the clamp for the lead wire on motor support and
separator.
(6) Release the lead wire from the hole on separator.
(7) Remove the fan motor fixing screws (4 for front/ 5 x 20) to
remove the fan motor.
(For the each fan motor on top and under)
Photo 2
Front panel
Propeller
Nut
Photo 3
Fan motor
fixing screws
Fan motor
Fan motor
fixing screws
OCH583A
60
PHOTOS
OPERATING PROCEDURE
3. Removing the electrical parts box
(1)
(2)
(3)
(4)
Remove the service panel. (See Photo 1)
Remove the top panel. (See Photo 1)
Disconnect the power supply cable from terminal block.
Disconnect the indoor/outdoor connecting wire from
terminal block.
(5) Disconnect the connector CNF1 (WHT), CNF2 (WHT),
TH3 (WHT), TH7/ 6 (RED), TH32 (BLK), 63H (YLW), 21S4
(GRN), LEV-A (WHT) and 63HS (WHT) from the controller
circuit board.
<Symbols on the board>
• Fan motor (CNF1, CNF2)
• Thermistor <Liquid> (TH3)
• Thermistor <Ambient/ 2-Phase Pipe> (TH7/6)
• Thermistor <Comp. Surface> (TH32)
• High pressure switch (63H)
• 4-way valve (21S4)
• LEV (LEV-A)
• High pressure sensor (63HS)
(6) Loosen the clamps, fasteners and cable strap for the lead
wire in the electrical parts box and separator.
(See photo 4)
(7) Loosen the lead wires fixed to the pipes with bands.
(8) To disconnect the COMP lead wire, remove the terminal
cover, then remove the COMP lead wire fixing screws (4
for front/ 5 x 12).
(9) Remove the electrical parts box fixing screws (2 for front/
4 x 10), then slide the electrical parts box upward to
remove it.
(The electrical parts box is fixed to the side panel (R) with
a hook on the right side, and to the separator duct with a
hook on the left side.)
OCH583A
61
Photo 4
Electrical parts box
Controller
circuit board
Electrical parts
box fixing screws
Terminal block
(Power supply)
Terminal block
(Indoor/Outdoor)
Side panel (R)
Valve bed
fixing screw
Valve bed
Terminal
cover
Compressor
PHOTOS
OPERATING PROCEDURE
4. Disassembling the electrical parts box
Photo 5
(1) Disconnect all the connectors on the controller circuit board.
(2) To remove the controller circuit board, release it from the
support.
(3) Remove cont base fixing screws (2 for front/ 4 x 10). (Photo 5)
(The cont. base is fixed to the cont base piece with a hook
on the left side.)
Screw
(4) Disconnect all the connectors on the noise filter circuit
board. (Photo 6)
(5) To remove the noise filter circuit board, release it from the support.
(6) Remove N.F. base fixing screws (2 for front/ 4 x 10). (Photo 7)
(7) Disconnect all the connectors on the power circuit board.
(8) To remove the power circuit board, remove power board fixing
screws (4 for front/ 4 x 12), then release the board from the
support. (Photo 8)
(9) The reactor is attached to the rear side of the electrical
parts box. (Photo 9)
(To remove the reactor, the electrical parts box must be
separated from the outdoor unit.)
Note: When reassembling the electrical parts box, make
sure the wirings are correct.
Photo 6
Photo 7
Noise filter
circuit board
(N.F.)
Photo 8
Screw
Photo 9
Screw
Screw
Screw
Cont base
Controller
circuit board (C.B.)
Screw
Noise filter
base
Screw
Reactor
Screw
Power circuit
board (P.B)
5. Removing the thermistor <2-Phase Pipe> (TH6)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Disconnect the connector TH7/6 (RED) on the controller
circuit board in the electrical parts box. (See Photo 4)
(4) Loosen the fastener for the lead wire in the electrical parts box.
(5) Loosen the clamp for the lead wire on the top of electrical parts box.
(6) Pull out the thermistor <2-phase pipe> (TH6) from thermistor clip.
Photo 10
Electrical parts box
Cont. box top
Note: When replacing thermistor <2-phase pipe>
(TH6), replace it together with thermistor
<Ambient> (TH7) since they are combined
together. Refer to procedure No.5 on the next
page to remove the thermistor <Ambient> (TH7).
Thermistor
<2-phase pipe>
(TH6)
OCH583A
62
OPERATING PROCEDURE
PHOTOS
6. Removing the thermistor <Ambient> (TH7)
Photo 11
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Disconnect the connector TH7/6 (RED) on the controller
circuit board in the electrical parts box. (See Photo 4)
(4) Loosen the fastener for the lead wire in the electrical parts
box.
(5) Loosen the clamps for the lead wire on top of the electrical
parts box.
(6) Pull out the thermistor <Ambient> (TH7) from thermistor holder.
Note: When replacing thermistor <Ambient> (TH7),
replace it together with thermistor <2-phase pipe>
(TH6), since they are combined together. Refer to
procedure No.4 in the previous page to remove the
thermistor <2-phase pipe>(TH6).
7. Removing the thermistor <Liquid> (TH3), and thermistor
<Comp. surface> (TH32).
(1) Remove the service panel. (See Photo 1)
(2) Disconnect the connector, TH3 (WHT) and TH32 (BLK) on
the controller circuit board in the electrical parts box. (See
Photo 4)
(3) Loosen the fastener, cable strap and band for the lead wire
on the controller circuit board in the electrical parts box.
(4) Loosen the clamp for the lead wire on separator.
(5) Pull out the thermistor <Liquid> (TH3) from thermistor clip.
(6) Remove the top damper, then pull out the thermistor
<Comp. surface> (TH32) from thermistor holder.
(7) Disconnect the connector from the high pressure sensor,
then remove the high pressure sensor.
Lead wire of thermistor <Ambient> (TH7)
Photo 12
High pressure sensor
(63HS)
Thermistor
<Comp. surface>
(TH32)
OCH583A
63
Sensor holder
Thermistor <Liquid> (TH3)
Compressor Damper
PHOTOS
OPERATING PROCEDURE
8. Removing the 4-way valve coil (21S4), LEV coil (LEV (A))
and lead wire for high pressure switch.
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box. (See Photo 4)
(4) Loosen the clamp for the lead wire on separator.
Photo 13
High pressure
switch
[Removing the lead wire for high pressure switch]
(5) Disconnect the lead wire from the high pressure switch.
[Removing the 4-way valve coil]
(5) Remove the 4-way valve coil fixing screw (1 for front/ M5)
to remove the 4-way valve coil.
4-way valve
(6) Slide the 4-way valve coil forward to remove it.
coil (21S4)
LEV coil
(LEV A)
[Removing the LEV coil]
(5) Loosen the lead wires fixed to the pipes with bands.
(6) Slide the LEV coil upward to remove it.
Accumulator
9. Removing the 4-way valve, LEV (LEV (A)) and high
pressure switch.
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box. (See Photo 4)
(4) Remove the cover panel (front). (See Photo 1)
(5) Remove the cover panel (rear). (See Photo 1)
(6) Remove the valve bed. (See Photo 14)
(7) Remove the side panel (R).
(8) Recover refrigerant.
[Removing the 4-way valve]
(9) Remove the 4-way valve coil. (See photo 13)
(10) Remove the welded part of 4-way valve (4 positions) to
remove the 4-way valve.
[Removing the LEV]
(9) Remove the LEV coil. (See photo 13)
(10) Remove the welded part of LEV (2 positions) to remove
the LEV.
[Removing the high pressure switch]
(9) Disconnect the lead wire from the high pressure switch.
(10) Remove the welded part of high pressure switch
(1 position) to remove the high pressure switch.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by
removing the side panel (R).
Note 3: When installing the following parts, cover it with
a wet cloth to prevent it from heating as the
temperature below, then braze the pipes so that
the inside of pipes are not oxidized;
• 4-way valve, 120°C or more
• LEV, 120°C or more
• High pressure switch, 100°C or more
OCH583A
64
OPERATING PROCEDURE
PHOTOS
10. Removing the compressor (MC)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box. (See Photo 4)
(4) Remove the cover panel (front). (See Photo1)
(5) Remove the cover panel (rear). (See Photo 1)
(6) Remove the valve bed. (See photo 14)
(7) Remove the side panel (R). (See Photo 1)
(8) Remove the front panel fixing screws (5 for front/ 5x12
and 2 for front/ 4x10), then slide the front panel upward to
remove it.
(The front panel is fixed with 4 hooks; 3 on the left side
fixing to the side panel (L), and the other on the right side
fixing to the separator.)
(9)Release the lead wire for FM1 and FM2 from the hole on
separator.
(10) Remove the separator fixing screws (4 for front/ 4x10),
then slide the separator upward to remove it.
(The separator is fixed to a hook of the side plate.)
(11) Recover refrigerant.
(12) Remove the welded part of compressor (2 positions).
(13) Remove the 3 compressor fixing nuts (M6) to remove the
compressor.
Photo 14
Valve bed
Valve bed
fixing screw
Valve
bed
fixing
screws
Separator
Accumulator
Compressor
(MC)
Separator
fixing screw
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The compressor can be easily removed by
removing separator.
Compressor
fixing nut
Photo 15
11. Removing the power receiver
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the electrical parts box. (See photo 4)
(4) Remove the cover panel (front). (See Photo 1)
(5) Remove the cover panel (rear). (See Photo 1)
(6) Remove the valve bed. (See Photo 14)
(7) Remove the side panel (R). (See Photo 1)
(8) Recover refrigerant.
(9) Remove the welded part of the accumulator (2 positions) to Compressor
(MC)
remove the accumulator.
(10) Remove the receiver leg fixing screws (2 for front/ 4 x 10),
then slide the power receiver forward to remove it.
(The power receiver is fixed to the base with a hook on
the bottom.)
Inlet
Outlet
Accumulator
Note: Recover refrigerant without spreading it in the air.
Receiver leg
fixing screws
OCH583A
65
Receiver
leg
HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
CCopyright 2015 MITSUBISHI ELECTRIC CORPORATION
Distributed in Aug. 2015 No. OCH583 REVISED EDITION-A
Distributed in Mar. 2015 No. OCH583
Made in Japan
New publication, effective Aug. 2015
Specifications are subject to change without notice.
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