SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
June 2015
SERVICE MANUAL
Outdoor unit
[Model Name]
PUHZ-P200YKA
PUHZ-P250YKA
No. OCH582
R410A
REVISED EDITION-B
[Service Ref.]
PUHZ-P200YKA.UK
PUHZ-P200YKAR1.UK
PUHZ-P250YKA.UK
PUHZ-P250YKAR1.UK
Revision:
• Added
PUHZ-P200YKAR1.UK and
PUHZ-P250YKAR1.UK in
REVISED EDITION-B.
•Some descriptions have been
modified.
• Please void OCH582
REVISED EDITION-A.
Note:
•This manual describes service
data of the outdoor units only.
CONTENTS
TECHNICAL CHANGES····································· 2
1. REFERENCE MANUAL·································· 3
2. SAFETY PRECAUTION·································· 3
3. FEATURES······················································ 7
4. SPECIFICATIONS··········································· 8
5. DATA································································ 9
6. OUTLINES AND DIMENSIONS···················· 12
7. WIRING DIAGRAM······································· 13
8. WIRING SPECIFICATIONS··························· 14
9. REFRIGERANT SYSTEM DIAGRAM·············· 19
10. TROUBLESHOOTING··································· 21
11. FUNCTION SETTING···································· 75
12. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER·····83
13. EASY MAINTENANCE FUNCTION·············· 92
14. DISASSEMBLY PROCEDURE······················ 95
PARTS CATALOG (OCB582)
TECHNICAL CHANGES
PUHZ-P200YKA.UK PUHZ-P200YKAR1.UK
PUHZ-P250YKA.UK PUHZ-P250YKAR1.UK
1. Software modification to be able to connect with PAC-IF013B-E/PAC-SIF013B-E (AHU interface) has been made.
OCH582B
2
1
REFERENCE MANUAL
INDOOR UNIT SERVICE MANUAL
Service
Manual No.
Model Name
Service Ref.
PLA-RP50/60/71/125/100BA
PLA-RP50/60/71/125/100BAR4.UK
OCH412
OCB412
PCA-RP50/60/71/100/125KAQ
PCA-RP50/60/71/100/125KAQR2(-ER)
OCH491
OCB491
PKA-RP50HAL
PKA-RP50HALR1(-ER)
OCH453
OCB453
PKA-RP60/71/100KAL
PKA-RP60/71/100KALR1.TH(-ER)
OCH452
OCB452
PSA-RP71/100/125KA
PSA-RP71/100/125KA
OCH528
OCB528
PEAD-RP50/60/71/100/125JA(L)Q
PEAD-RP50/60/71/100/125JA(L)QR2.UK
HWE10090
BWE10160
PEA-RP200/250GAQ
PEA-RP200/250GAQ.TH-AF
HWE10070
BWE10140
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.
OCH582B
3
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.
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.
Contamination inside refrigerant piping can cause deterioration of refrigerant oil, etc.
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.
The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
If large amount of mineral oil enters, that can cause deterioration of refrigerant oil, etc.
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.
If other refrigerant (R22, etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil, etc.
Use a vacuum pump with a reverse flow check
valve.
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.
Gauge manifold
Charge hose
Gas leak detector
Torque wrench
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.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.
Use the specified refrigerant only.
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.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
[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
OCH582B
Gravimeter
4
[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.
▼
Disconnect the existing air conditioner from the
pipes.
• If the existing air conditioner cannot operate, use a
refrigerant recovery device to collect the refrigerant.
• In case existing pipes were used for gas or oil
heat pump systems, be sure to clean the pipes for
P200/250 models.
▼
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.
▼
Test run
OCH582B
5
(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
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
OCH582B
Use
Air purge, refrigerant charge
and operation check
Gas leak check
Refrigerant recovery
Refrigerant charge
Apply to flared section
6
3
FEATURES
PUHZ-P200YKA
PUHZ-P250YKA
CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT
Maximum 30 m (PUHZ-P200/250)
The refrigerant circuit with LEV (Linear Expansion Valve) and 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.
OCH582B
7
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
REFRIGERANT PIPING
Dimensions
Weight
Refrigerant
Charge
Oil (Model)
Pipe size O.D.
Connection method
Between the indoor &
outdoor unit
OCH582B
A
kW
PUHZ-P200YKA.UK
PUHZ-P250YKA.UK
PUHZ-P200YKAR1.UK
PUHZ-P250YKAR1.UK
3 phase 50 Hz, 400 V
21
19
Munsell 3Y 7.8/1.1
Linear Expansion Valve
Hermetic
ANB52FRNMT
5.5
4.7
Line start
HP switch
Comp. surface thermo
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
58
60
127 (281)
6.5
9.52 (3/8)
25.4 (1)
8
—
Plate fin coil
Propeller fan o 2
0.200 + 0.200
140 (4,940)
Reverse cycle
1,050 (41-5/16)
330 + 40 (13+1-9/16)
1,338 (52-11/16)
R410A
2.30 (FVC68D)
Flared
Flared & Brazing
Maximum 30 m
Maximum 70 m
59
62
135 (298)
7.7
12.7 (1/2)
25.4 (1)
5
DATA
5-1. REFILLING REFRIGERANT CHARGE (R410A: kg) PUHZ-P200/250
Piping length (one way)
Service Ref.
40 m
Initial
50 m
60 m
charged
10 m
20 m
30 m
70 m
PUHZ-P200YKA.UK
PUHZ-P200YKAR1.UK
5.9
6.2
6.5
+ 0.9 (7.4) + 1.8 (8.3) + 2.7 (9.2) + 3.6 (10.1)
6.5
PUHZ-P250YKA.UK
PUHZ-P250YKAR1.UK
6.9
7.3
7.7
+ 1.2 (8.9) + 2.4 (10.1) + 3.6 (11.3) + 4.8 (12.5)
7.7
Additional charge is required for pipes longer than 30 m.
5-2. ADJUSTING THE AMOUNT OF REFRIGERANT PUHZ-P200/250
Permitted
pipe length
Service Ref.
PUHZ-P200YKA.UK
PUHZ-P200YKAR1.UK
Amount of additional refrigerant charge (kg)
Initial charge
(kg)
30 m and less
6.5
No additional
70 m or less
PUHZ-P250YKA.UK
PUHZ-P250YKAR1.UK
charge necessary
7.7
5-3. COMPRESSOR TECHNICAL DATA
(at 20°C)
Service Ref.
PUHZ-P200/250YKA.UK
PUHZ-P200/250YKAR1.UK
Compressor model
ANB52FRNMT
Winding
Resistance
(")
U-V
0.30
U-W
0.30
W-V
0.30
OCH582B
9
31–40 m and less 41–50 m and less 51–60 m and less 61–70 m and less
0.9 kg
1.8 kg
2.7 kg
3.6 kg
1.2 kg
2.4 kg
3.6 kg
4.8 kg
MICROPHONE
5-4. NOISE CRITERION CURVES
1m
UNIT
1.5m
GROUND
PUHZ-P200YKA.UK
PUHZ-P200YKAR1.UK
MODE SPL(dB)
COOLING
58
HEATING
60
LINE
PUHZ-P250YKA.UK
PUHZ-P250YKAR1.UK
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
10
LINE
90
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
125
NC-20
250
500
1000
2000
4000
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
90
MODE SPL(dB)
COOLING
59
HEATING
62
8000
BAND CENTER FREQUENCIES, Hz
OCH582B
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
10
8000
5-5. STANDARD OPERATION DATA
PLA-RP100BAR4.UK
Representative matching
Total
Mode
Cooling
Heating
Cooling
Heating
Capacity
W
19,000
22,400
22,000
27,000
Input
kW
5.92
6.36
7.83
8.41
Indoor unit
PLA-RP100BAR4.UK
Phase , Hz
Electrical circuit
Voltage
V
Input
Current
Refrigerant circuit
PLA-RP125BAR4.UK
1, 50
1, 50
230
230
kW
0.14
0.13
0.15
0.14
A
0.94
0.87
1.00
0.94
Outdoor unit
PUHZ-P200YKA.UK
PUHZ-P200YKAR1.UK
PUHZ-P250YKA.UK
PUHZ-P250YKAR1.UK
3, 50
3, 50
400
400
Phase , Hz
Outdoor Indoor side
side
PLA-RP125BAR4.UK
Voltage
V
Current
A
7.77
8.63
10.57
11.78
Discharge pressure
MPa
2.97
2.81
3.03
2.99
Suction pressure
MPa
0.89
0.63
0.83
0.63
Discharge temperature
°C
66.8
68.8
74.5
79.2
Condensing temperature
°C
48.8
45.0
50.3
50.2
Suction temperature
°C
7.6
−2.1
5.6
−2.0
Ref. pipe length
m
7.5
7.5
7.5
7.5
D.B.
°C
27
20
27
20
W.B.
°C
19
15
19
15
D.B.
°C
13.3
41.6
12.4
45.3
D.B.
°C
35
7
35
7
W.B.
°C
24
6
24
6
SHF
0.74
—
0.71
—
BF
0.21
—
0.18
—
Intake air temperature
Discharge air temperature
Intake air temperature
OCH582B
11
6
OUTLINES AND DIMENSIONS
Unit: mm
PUHZ-P200YKA.UK
PUHZ-P200YKAR1.UK
PUHZ-P250YKA.UK
PUHZ-P250YKAR1.UK
OCH582B
12
7
WIRING DIAGRAM
PUHZ-P200YKA.UKPUHZ-P250YKA.UK
PUHZ-P200YKAR1.UKPUHZ-P250YKAR1.UK
NAME
Terminal Block <Power Supply>
Terminal Block <Indoor/Outdoor>
Motor for Compressor
Fan Motor
Solenoid Valve (Four-Way Valve)
High Pressure Switch
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>
Capacitor
SYMBOL
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.
SW1
SW4
SW5
SW6
SW7
SW8
TH32 TH7 TH6 TH3
1 3
63H
(YLW)
3
CNDC
(PNK)
1
3
4
SW7
SW6
1
1
TB7
M-NET
3 SV1
(GRY)
CN51 1
(WHT)
3 SS
(WHT)
1
5
*1. MODEL SELECT
The black square (■) indicates a switch position.
MODEL
SW6
SW5-6 *2
RED FUSE2 RED
WHT FUSE1 WHT
21S4
ON
200Y OFF
7
2
t°
1 2
CN6
(WHT)
1 2
CN5
(RED)
1
CN2
(RED)
L3OUT
*2. SW5-1 to 5: Function switch
BLK
TB-L3
S3
RS
TB-P3
TB-P1
TB-U
TB-V
TB-W
RED
WHT
BLK
YLW
ORN
V W
U MS
3~
BRN
S2
RED
RED
X52CA TB-L1
CY1
CY2
INDOOR
UNIT
RED
TB-L2
L3IN
WHT
DCL
MC
2
CNAC1
(WHT) 1
RED
LI1
CNAC2
3 (RED)
LO1
RED
WHT
LI2
LO2
WHT
BLK
LI3
LO3
BLK
BLU
NI
TB1
L1
POWER
SUPPLY
3N ~
400V 50Hz
L2
L3
GRN/YLW
N
CNCT
(RED) 1 2 1
3
M-NET ADAPTER
SYMBOL
TB7
CN5
CND
CN2M
OCH582B
NAME
Terminal Block <M-NET connection>
Connector <Transmission>
Connector <Power Supply>
Connector <M-NET communication>
13
2
3
3
WHT
WHT
CNDC 1
(PNK)
GD2
BLK
N.F.
BLK
GD1
ON
OFF
1 2 3 4 5 6 7 8
7 1 2
CN4
(WHT)
X52CB
S1
1 2 3 4 5 6
2
ON
250Y OFF
BLK
TB2
ON
OFF
1 2 3 4 5 6 7 8
TH8
P.B.
CND
(WHT)
3 1
3
CN3S 1 3
(WHT)
X54
3
CN2M
(WHT)
CN31
CNDM 1 3
(WHT)
X52
21S4 1
(GRN)
F4
M-NET ADAPTER
2
A B S
7
F3
*1
SW9
14
CNM
(WHT)
2
CNAC
(WHT)
1 2
CNS
(WHT)
3
1
CN4
(WHT)
1 2
CN2
1 (RED) 7
TRANS
*1
1 3 1
5
CNVMNT CNMNT
(WHT) (WHT)
1
5
LEV-A
(WHT)
CNF2
(WHT)
1
CN5
(WHT)
1
5
t°
4 1 2
1 2 1
TH3
TH32 TH7/6
(BLK) (RED) (WHT)
2
5
X51
7
3
LED2
1
5
M
SW1
CNF1
7 (WHT)
1
MF2
MS
3~
When M-NET adapter is connected
SW5
t° t°
t°
NAME
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>
Connector
CNMNT
<Connect to Optional M-NET Adapter Board>
Connector
CNVMNT
<Connect to Optional M-NET Adapter Board>
LED1, LED2 LED <Operation Inspection Indicators>
Fuse <T6.3AL250V>
F3, F4
X51, X52, X54 Relay
SW4 SWP SW8
C. B.
SYMBOL
SW9
SWP
CN31
CN3S
CNDM
CN51
SV1
SS
CNM
LEV-A
63H
MF1
MS
3~
NAME
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>
Switch <Function Switch>
LED1
SYMBOL
TB1
TB2
MC
MF1, MF2
21S4
63H
TH3
TH6
TH7
TH8
TH32
LEV-A
ACL4
DCL
RS
FUSE1, FUSE2
CY1, CY2
1 CNL
(BLU)
ACL4
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
P200/250Y
Outdoor unit power supply
3N~ (3 ph 4-wires), 50 Hz, 400 V
Outdoor unit input capacity main switch (Breaker) *1
32A
Outdoor unit power supply
5 × Min. 4
Indoor unit-Outdoor unit
*2 Cable length 50 m:3×4 (Polar)/Cable length 80 m:3×6 (Polar)
1 × Min. 2.5
Indoor unit-Outdoor unit earth
*2
2 × 0.3 (Non-polar)
Remote controller-Indoor unit
*3
Outdoor unit L1-N, L2-N, L3-N (3 phase) *4
230 V AC
Indoor unit-Outdoor unit S1-S2
*4
230 V AC
Indoor unit-Outdoor unit S2-S3
*4
24 V DC
Remote controller-Indoor unit
*4
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.
• Maximum 50 m. Total maximum for PEA. Wiring size 3 × 1.5 (Polar).
*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 code..
2. Power supply cables and Indoor/Outdoor unit connecting cables shall not be lighter than polychloroprene sheathed flexible cable.
(Design 60245 IEC 57)
3. Install an earth longer than other cables.
Power supply
Isolator
3 poles isolator
S1
S1
A-Control S2
Outdoor Unit
S2
S3
S3
A-Control
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.
Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fire or communication failure.
Synchronized twin and triple system Electrical wiring
• Synchronized triple
• Synchronized twin
Outdoor
unit
Unit
power
supply
B
L
N
C
Indoor/outdoor
unit connection
cable
S1
S2
S3
B Earth leakage breaker
C wiring circuit breaker or
isolating switch
Indoor
unit
1
2
Remote
controller
S1
S2
S3
1
2
Unit
power
supply
B
C
B Earth leakage breaker
C wiring circuit breaker or
isolating switch
L1
L2
L3
N
S1
S2
S3
Indoor/outdoor
unit connection
cable
Unit
power
supply
S1
S2
S3
1:1 System (Indoor: PEA-200, 250)
Outdoor
unit
Outdoor
unit
Indoor
unit
B
S1
S2
S3
B Earth leakage breaker
C wiring circuit breaker or
isolating switch
Outdoor
unit No.1
Remote
controller
B
Unit
power
supply
Unit
power
supply
B
C
B Earth leakage breaker
C wiring circuit breaker or
isolating switch
Unit
power
supply
B
L1
L2
L3
N
S1
S2
S3
14
Indoor/outdoor
unit connection
cable
Outdoor
unit No.2
C
L1
L2
L3
N
S1
S2
S3
OCH582B
Indoor/outdoor
connection cable
S1
S2
S3
Remote
controller
S1
S2
S3
Indoor
unit
Indoor
unit
1
2
1
2
S1
S2
S3
S1
S2
S3
1:2 System (Indoor: PEA-400, 500)
C
1
2
1
2
L
N
C
Indoor
unit
L1
L2
L3
N
Indoor
unit
Indoor
unit
L1
L2
L3
N
C
S1
S2
S3
TB4-1
1
2
Indoor/outdoor
unit connection
cable
TB4-2
S1
S2
S3
Remote
controller
B
Unit
power
supply
8-2. SEPARATE INDOOR UNIT/OUTDOOR UNIT POWER SUPPLIES
The following illustrations show available connection patterns.
The outdoor unit power supply patterns vary on models.
Simultaneous twin/triple system
<For models without heater>
The optional indoor power supply terminal kit is required.
H
D
G
L
A
B
C
N
J
B
C
H
G
L
L
L
N
N
N
S1
S1
S1
S2
S2
S2
S3
S3
S3
S3
1
1
1
2
2
2
E
F
A Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E Indoor unit/outdoor unit connecting cables
F Remote controller
G Indoor unit
H Option
J Indoor unit power supply
K Indoor unit earth
H
G
S1
K
S2
K
Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.
If the indoor and outdoor units have separate power supplies, refer to the table below.
If the optional indoor power supply terminal kit is used, change the indoor unit
electrical box wiring referring to the figure in the right and the DIP switch settings of
Electric heater
the outdoor unit control board.
L
N
Required
S1
S2
S3
ORANGE
CN01
Indoor unit
control board
Indoor unit power supplied from outdoor unit
(when shipped from factory)
Electric heater
(For models with
heater)
L
N
S1
S2
S3
Connectors
CND
Note: There are 3 types of labels; A, B, and C.
Affix the appropriate label to the units according to the wiring method.
If the indoor and
outdoor units have
separate power
supplies, change the
connections of the
connectors as shown
in the following
figure.
BLUE YELLOW
YELLOW BLUE
3
ON
OFF
1 2
(SW8)
Set the SW8-3 to ON.
CND
Required
BLUE YELLOW
BLUE YELLOW
Indoor power supply terminal kit (option)
Indoor unit electrical box connector connection change
Label affixed near each wiring diagram
for the indoor and outdoor units
Outdoor unit DIP switch settings (when
using separate indoor unit/outdoor unit
power supplies only)
(For models with
heater)
Indoor unit specifications
Required
Connectors (connections when shipped
from the factory are for indoor unit power
supplied from outdoor unit)
ORANGE
CN01
Indoor unit
control board
Separate indoor unit/outdoor unit power
supplies
Indoor unit model
Indoor unit power supply
Indoor unit input capacity
Main switch (Breaker)
Indoor unit power supply
Indoor unit power supply earth
Indoor unit-Outdoor unit
Indoor unit-Outdoor unit earth
Remote controller-Indoor unit
RP35–140
~/N (single), 50 Hz, 230 V
16 A
*1
Circuit
rating
Wiring
Wire No. o size
(mm2)
3 o Min. 1.5
1 o Min. 1.5
2 o Min. 0.3
*2
–
2 o 0.3 (Non-polar)
*3
Indoor unit L-N
*4
230 V AC
–
Indoor unit-Outdoor unit S1-S2
*4
Indoor unit-Outdoor unit S2-S3
*4
24 V DC
Remote controller-Indoor unit
*4
12 V DC
*1. A breaker with at least 3 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductor of the supply.
*2. Maximum 120 m
*3.The 10 m wire is attached in the remote controller accessory. Maximum 500 m
*4.The figures are NOT always against the ground.
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Power supply cables and indoor unit/outdoor unit connecting cables shall not be lighter than polychloroprene sheathed
flexible cable. (Design 60245 IEC 57)
3. Install an earth longer than other cables.
OCH582B
15
8-3. INDOOR – OUTDOOR CONNECTING CABLE
WIRING SPECIFICATIONS FOR 220−240 V, 50 Hz
(INDOOR-OUTDOOR CONNECTING CABLE)
Cross section of cable
Round
Wire size (mm2)
Number of wires
2.5
3
Polarity
Clockwise : S1-S2-S3
(Pay attention to stripe of yellow and green.)
2.5
3
Not applicable
(Because center wire has no cover finish)
1.5
4
2.5
4
Flat
Flat
Round
L (m)*5
(30)
*1
Not applicable
*4
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 case that 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.
(3C Flat cable × 2)
-
Wire No. o Size (E)
Indoor/Outdoor separate
power supply
Max. 120m
Indoor unit-Outdoor unit
2 o Min. 0.3
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 earth or a poor electrical contact at the intermediate connection point.
OCH582B
16
8-4. M-NET WIRING METHOD
Points to note:
(1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from
making an influence on the signal communication. Place them at intervals of more than 5 cm. Do not put them in the same
conduit tube.
(2) Terminal block (TB7) for transmission wires should never be connected to 220–240 V power supply. If it is connected,
electronic parts on M-NET P.C. board may burn out.
(3) Use 2-core × 1.25 mm² shield wire (CVVS, CPEVS) for the transmission wire. Transmission signals may not be sent or
received normally if different types of transmission wires are put together in the same multi-conductor cable. Never do this
because this may cause a malfunction.
Refrigerant
address 00
M-NET
address 02
Refrigerant
address 00
M-NET
address 01
Centralized
controller
Power
supply unit
A-control
remote
controller
A-control
remote
controller
Refrigerant
address 00
M-NET
address 03
A-control
remote
controller
It is acceptable if M-NET wire (non-polar, 2-cores) is arranged in addition to the wiring for A-control.
(4) Earth only one of any appliances through M-NET transmission wire (shield wire). Communication error may occur due to
the influence of electromagnetic noise.
“Ed” error will appear on the LED display of outdoor unit.
“0403” error will appear on the central-control remote controller.
O Bad example (Multi spot earthing of shield wire)
Centralized
controller
Power
supply unit
M-NET type
outdoor unit
M-NET type
outdoor unit
M-NET type
outdoor unit
M-NET transmission wire
Good example 1 (Single spot earthing of shield wire)
Centralized
controller
Power
supply unit
M-NET type
outdoor unit
M-NET type
outdoor unit
M-NET type
outdoor unit
M-NET transmission wire
Good example 2 (Single spot earthing of shield wire)
Centralized
controller
Power
supply unit
M-NET type
outdoor unit
M-NET type
outdoor unit
M-NET type
outdoor unit
M-NET transmission wire
If there are more than 2 earthing spots on the shield wire, noise may enter into the shield wire because the earth wire and
shield wire form 1 circuit and the electric potential difference occurs due to the impedance difference among earthing spots.
In case of single spot earthing, noise does not enter into the shield wire because the earth wire and shield wire do not form
1 circuit.
To avoid communication errors caused by noise, make sure to observe the single spot earthing method described in the
installation manual.
OCH582B
17
M-NET wiring
(1) Use 2-core × 1.25 mm² shield wire for electric wires.
(Excluding the case connecting to system controller.)
(2) Connect the wire to the M-NET terminal block. Connect one core of the transmission
wire (non-polar) to A terminal and the other to B. Peel the shield wire, twist the shield
part to a string and connect it to S terminal.
(3) In the system which several outdoor units are being connected, the terminal (A, B,
S) on M-NET terminal block should be individually wired to the other outdoor unit’s
terminal, i.e. A to A, B to B and S to S. In this case, choose one of those outdoor units and
wire on the plate as shown on the right figure.
M-NET
terminal
block
Earth
wire
A
B
S
Transmission Shield
wire part
drive a screw to fix an earth
8-4-1. M-NET address setting
In A-control models, M-NET address and refrigerant address should be set only for the outdoor unit. Similar to CITY MULTI
system, there is no need to set the address of outdoor unit and remote controller. To construct a central control system, the
setting of M-NET address should be conducted only upon the outdoor unit. The setting range should be 1 to 50 (the same as
that of the indoor unit in CITY MULTI system), and the address number should be consecutively set in a same group.
9 01
9 01
78
90 1
901
9 01
23
78
78
9 01
78
~
23
456
23
456
23
456
78
8-4-2. Refrigerant address setting
50
23
456
2nd
digit
2
23
456
setting SW12
1
456
SW11
1st
Switch digit
78
<Setting example> M-NET Address No.
Address number can be set by using rotary switches
(SW11 for 1st digit and SW12 for 2nd digit), which
is located on the M-NET board of outdoor unit.
(Initial setting: all addresses are set to “0”.)
In the case of multiple grouping system (multiple refrigerant circuits in 1 group), indoor units should be connected by remote
controller wiring (TB5) and the refrigerant address needs to be set. Leave the refrigerant addresses to “00” if the group setting is not conducted. Set the refrigerant address by using DIP SW1-3 to -6 on the outdoor controller board. [Initial setting: all
switches are OFF. (All refrigerant addresses are “00”.)]
ON
ON
OFF
Refrigerant
address
ON
OFF
1 2 3 4 5 6
0
ON
ON
ON
9
8
ON
10
5
11
12
1 2 3 4 5 6
6
7
ON
OFF
1 2 3 4 5 6
OFF
1 2 3 4 5 6
ON
OFF
1 2 3 4 5 6
ON
OFF
1 2 3 4 5 6
4
OFF
1 2 3 4 5 6
ON
OFF
1 2 3 4 5 6
3
OFF
1 2 3 4 5 6
ON
OFF
1 2 3 4 5 6
2
ON
OFF
1 2 3 4 5 6
ON
OFF
1 2 3 4 5 6
1
OFF
ON
OFF
1 2 3 4 5 6
ON
OFF
1 2 3 4 5 6
OFF
1 2 3 4 5 6
13
14
1 2 3 4 5 6
15
8-4-3. Regulations in address settings
In the case of multiple grouping system, M-NET and refrigerant address settings should be done as explained in the above
section. Set the lowest number in the group for the outdoor unit whose refrigerant address is “00” as its M-NET address.
Group A
Centralized
controller
Power
supply unit
Group B
Refrigerant
address 00
M-NET
address 01
Group C
Refrigerant
address 00
M-NET
address 02
Refrigerant
address 01
M-NET
address 03
Refrigerant
address 00
M-NET
address 04
TB5
A-control
remote
controller
A-control
remote
controller
A-control
remote
controller
Refrigerant addresses can be overlapped if they are in the different group.
Group A
Centralized
controller
Power
supply unit
Refrigerant
address 00
M-NET
address 01
Group B
Refrigerant
address 01
M-NET
address 02
Refrigerant
address 00
M-NET
address 04
Refrigerant
address 01
M-NET
address 03
Refrigerant
address 02
M-NET
address 05
TB5
A-control
remote
controller
A-control
remote
controller
Note: In group B, M-NET address of the outdoor unit whose refrigerant address is “00” is not set to the minimum in the
group. As “3” is right for this situation, the setting is wrong. Taking group A as a good sample, set the minimum
M-NET address in the group for the outdoor unit whose refrigerant address is “00”.
OCH582B
18
9
REFRIGERANT SYSTEM DIAGRAM
Unit: mm (in)
PUHZ-P200YKA.UKPUHZ-P250YKA.UK
PUHZ-P200YKAR1.UKPUHZ-P250YKAR1.UK
Refrigerant flow in cooling
Refrigerant flow in heating
Ball valve
Charge plug
(High pressure)
Refrigerant GAS pipe
<Blazing>
connection [25.4([1 inch)
Strainer
#50
4-way valve
Charge plug
(Low pressure)
Thermistor TH6
(2-phase pipe)
High pressure
switch 63H
Muffler
Accumulator
Strainer
#100
Stop valve
(with service port)
Thermistor TH3
(Liquid)
Thermistor TH32
(Comp, surface)
Thermistor TH8
(Control protection)
Oil return hole
with strainer #40
Refrigerant LIQUID pipe
P200 : connection [9.52([3/8 inch)
P250 : connection [12.7([1/2 inch)
Compressor
Strainer Linear expansion valve A Strainer
#100
#100
LEV-A
HEX
Stop valve
OCH582B
Heat exchanger
Thermistor TH7
(Ambient)
19
Distributor
9-1. 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.
• Start-up 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.
9-2. Start and finish of test run
• Operation from the indoor unit
Execute the test run using the installation manual for the indoor unit.
• Operation from the outdoor unit
By using the DIP switch SW4 on the control board of outdoor unit, test run can be started and finished, and its operation
mode (cooling/heating) can be set up.
<SW4>
1 Set the operation mode (cooling/heating) using SW4-2.
C D
2 Turn on SW4-1 to start test run with the operation mode set by SW4-2.
ON
3 Turn off SW4-1 to finish the test run.
OFF
• There may be a faint knocking sound around the machine room after power is supplied. However, 1
2
this is not a problem with product because the linear expansion pipe is just moving to adjust
A
B
opening pulse.
A Stop
C Operation
• There may be a knocking sound around the machine room for several seconds after compressor
B
Cooling
D
Heating
starts operating. However, this is not a problem with product because it is generated by the check
valve itself due to a small pressure difference in the refrigerant circuit.
Note:
The operation mode cannot be changed by SW4-2 during test run. (To change test run mode, stop the unit by SW4-1,
change the operation mode and restart the test run by SW4-1.)
OCH582B
20
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 “10-4. SELF-DIAGNOSIS ACTION TABLE”.
The trouble is reoccurring.
Not displayed
Conduct trouble shooting and ascertain the cause of the
trouble according to “10-5. 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
1Re-check the abnormal symptom.
2Conduct trouble shooting and ascertain the cause of the
trouble according to “10-5. 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. CHECK POINT UNDER TEST RUN
10-2-1. Before test run
• After installation of indoor and outdoor units, piping work and electric wiring work, re-check that there is no refrigerant leakage, loosened connections and incorrect polarity.
• Measure impedance between the ground and the power supply terminal block (L, N) on the outdoor unit by 500 V Megger
and check that it is 1.0 M" or over.
• Do not use 500 V Megger to indoor/outdoor connecting wire terminal block (S1, S2, S3) and remote controller terminal block
(1, 2). This may cause malfunction.
• Make sure that test run switch (SW4) is set to OFF before turning on power supply.
• Turn on power supply 12 hours before test run in order to protect compressor.
• For specific models which require higher ceiling settings or auto-recovery feature from power failure, make proper changes of
settings referring to the description of “11. FUNCTION SETTING”.
Make sure to read operation manual before test run. (Especially items to secure safety.)
OCH582B
21
10-2-2. Test run for wired remote controller <PAR-30MAA> <PAR-31MAA>
MENU RETURN SELECT
ON/OFF
Function buttons
F1
1 Select "Service" from the Main menu, and press the
button.
Select "Test run" with the F1 or F2 button, and press the
F3
F4
Service menu
button.
Test run
Input maintenance info.
Function setting
Check
Self check
Main menu:
Cursor
F1
2 Select "Test run" with the F1 or F2 button, and press the
F2
button.
F2
F3
F4
Test run menu
Test run
Drain pump test run
Service menu:
Cursor
F1
Test run
Test run operation
Press the F1 button to go through the operation modes in the order of "Cool
and Heat".
Cool mode: Check the cold air blows out.
Heat mode: Check the warm air blows out.
F3
F4
Remain
Pipe
Cool
Switch disp.
Mode
F1
Check the operation of the outdoor unit’s fan.
Press the
F2
Auto
Fan
F2
F3
F4
button and open the Vane setting screen.
Remain
Auto vane check
Check the auto vane with the F1
F2 buttons.
Press the
button to return to “Test run operation”.
Press the
button.
Vane
F1
When the test run is completed, the “Test run menu” screen will appear.
The test run will automatically stop after 2 hours.
OCH582B
22
F2
F3
F4
<Error information>
When an error occurs, the following screen will appear.
Check the error status, stop the operation, and consult your dealer.
1 Check code, error unit, refrigerant address, unit model name, and serial
number will appear.
The model name and serial number will appear only if the information has
been registered.
Press the F1 or F2 button to go to the next page.
Error information
Error code
Error unit IU
Ref. address
Unt#
Model name
Serial No.
Reset error: Reset button
Page
Reset
F1
Contact information (dealer's phone number) will appear if the information have
been registered.
F2
F3
F4
blinks
Error information
Contact information
Dealer
Tel
Reset error: Reset button
Page
Reset
2 Press the F4 button or the
button to reset the error that is occurring.
Errors cannot be reset while the ON/OFF operation is prohibited.
Error information
Error code
Error unit IU
Ref. address
Unt#
Model name
Serial No.
Reset error: Reset button
Page
Reset
F1
Select "OK" with the F4 button.
F2
F3
F4
Error reset
Reset current error?
F1
F2
Cancel
OK
F3
F4
Error reset
Error reset
Navigating through the screens
• To go back to the Main menu ..........
OCH582B
Main menu:
button
23
blinks
<Checking the error information>
While no errors are occurring, page 2/2 of the error information can be viewed by
selecting "Error information" from the Main menu.
Errors cannot be reset from this screen.
Main
Main menu
Restriction
Energy saving
Night setback
Filter information
Error information
Main display:
Cursor
Page
F1
F2
F3
F4
<Error history>
1 Select "Service" from the Main menu, and press the
button.
Select "Check" with the F1 or F2 button, and press the
Service menu
button.
Test run
Input maintenance info.
Function setting
Check
Self check
Main menu:
Cursor
F1
2 Select "Error history" with the F1 or F2 button, and press the
button.
F2
F3
F4
Check menu
Error history
Refrigerant volume check
Refrigerant leak check
Smooth maintenance
Request code
Service menu:
Cursor
Error history
Error history
3 Select "Error history" from the Check menu, and press the
up to 16 error history records.
button to view
4 records are shown per page, and the top record on the first page indicates
the latest error record.
F1
F2 dd/mm/yy
F3
Error Unt#
Check menu:
Delete
Page
F1
F2
F4
F3
F4
Error history
Deleting the error history
4 To delete the error history, press the F4 button (Delete) on the screen that
shows error history.
A confirmation screen will appear asking if you want to delete the error history.
Delete error history?
Cancel
OK
Press the F4 button (OK) to delete the history.
Error history
"Error history deleted" will appear on the screen.
Press the
Error history deleted
button to go back to the Check menu screen.
Check menu:
OCH582B
24
blinks
10-2-3. Test run for wireless remote controller
Measure an impedance between the power supply terminal block on
the outdoor unit and ground with a 500V Megger and check that it is
equal to or greater than 1.0M".
1 Turn on the main power to the unit.
TEST RUN
2 Press the button
twice continuously.
(Start this operation from the status of remote controller display
turned off.)
TEST RUN
A and
current operation mode are displayed.
MODE
COOL
3 Press the ( ) button to activate mode,
then
check whether cool air blows out from the unit.
MODE
HEAT
4 Press the ( )
button to activate mode,
then
check whether warm air blows out from the unit.
FAN
5 Press the button and check whether strong air blows out
from the unit.
VANE
6 Press the button and check whether the auto vane operates
properly.
7 Press the ON/OFF button to stop the test run. Note:
• Point the remote controller towards the indoor unit receiver
while following steps 2 to 7.
• It is not possible to run in FAN, DRY or AUTO mode.
OCH582B
25
TEST RUN
TEMP
ON/OFF
7
FAN
AUTO STOP
VANE
AUTO START
5
MODE
6
3,4
CHECK LOUVER
min
TEST RUN
2
SET
h
RESET
CLOCK
10-3. HOW TO PROCEED "SELF-DIAGNOSIS"
10-3-1. Self-diagnosis <PAR-30MAA> <PAR-31MAA>
1 Select "Service" from the Main menu, and press the
button.
Select "Self check" with the F1 or F2 button, and press the
Service menu
Test run
Input maintenance info.
Function setting
Check
Self check
button.
Main menu:
Cursor
F1
ith the F1 or F2 button, enter the refrigerant address, and press the
2W
button.
F2
F3
F4
Self check
Ref. address
Select:
Address
F1
3 Check code, unit number, attribute will appear.
F2
F3
F4
Self check
Ref. address
"-" will appear if no error history is available.
Error
Unt #
Grp.IC
Return:
Reset
When there is no error history
F1
F2
F3
F4
Self check
Ref. address
Error --
Unt# -
Return:
4 Resetting the error history.
F1
Press the F4 button (Reset) on the screen that shows the error history.
Reset
F2
F3
Self check
Delete error history?
Navigating through the screens
• To go back to the Main menu ..........
• To return to the previous screen .......
OCH582B
Cancel
F1
If deletion fails, "Request rejected" will appear.
"Unit not exist" will appear if no indoor units that are correspond to the entered
address are found.
button
26
F2
OK
F3
Self check
Ref. address
F4
Error history deleted
Return:
F1
button
F4
Ref. address
A confirmation screen will appear asking if you want to delete the error history.
Press the F4 button (OK) to delete the error history.
-Grp.
F2
F3
F4
10-3-2. Remote controller check <PAR-30MAA> <PAR-31MAA>
If operations cannot be completed with the remote controller, diagnose the remote controller with this function.
1 Select "Service" from the Main menu, and press the
button.
Service menu
Maintenance password
Remote controller check
Select "Remote controller check" with the F1 or F2 button, and press
button.
the
Main menu:
Cursor
F1
elect "Remote controller check" from the Service menu, and press the
2S
but-
ton to start the remote controller check and see the check results.
F2
F3
F4
Remote controller check
Start checking?
To cancel the remote controller check and exit the Remote controller check
menu screen, press the
or the
button.
The remote controller will not reboot itself.
F1
3 OK: No problems are found with the remote controller. Check other
parts for problems.
E3, 6832: There is noise on the transmission line, or the indoor unit or another
remote controller is faulty. Check the transmission line and the
other remote controllers.
NG (ALL0, ALL1): Send-receive circuit fault. Remote controller needs replacing.
ERC: The number of data errors is the discrepancy between the number of
bits in the data transmitted from the remote controller and that of the
data that was actually transmitted over the transmission line. If data
errors are found, check the transmission line for external noise interference.
If the
button is pressed after the remote controller check results are displayed, remote controller check will end, and the remote controller will automatically reboot itself.
Check the remote controller display and see if anything is displayed
(including lines). Nothing will appear on the remote controller display if
the correct voltage (8.5–12 V DC) is not supplied to the remote controller. If this is the case, check the remote controller wiring and indoor
units.
OCH582B
Begin:
27
F2
F3
F4
Remote controller check results screen
Remote controller check
Start checking?
Begin:
F1
F2
F3
F4
10-3-3. Self-diagnosis <Wireless remote controller>
<In case of trouble during operation>
When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform
unusual stop.
<Malfunction-diagnosis method at maintenance service>
[Procedure]
Refrigerant
address
display
CHECK
CHECK
display
Temperature
button
TEMP
ON/OFF
1. Press the CHECK button twice.
• "CHECK" lights, and refrigerant address
"00" flashes.
• Check that the remote controller's
display has stopped before continuing.
2. Press the TEMP buttons.
• Select the refrigerant address of the
indoor unit for the self-diagnosis.
Note: Set refrigerant address using the
outdoor unit’s DIP switch (SW1).
(For more information, see the
outdoor unit installation manual.)
ON/OFF
button
MODE
FAN
AUTO STOP
VANE
AUTO START
CHECK LOUVER
CHECK
button
min
TEST RUN
SET
h
RESET
CLOCK
HOUR
button
3. Point the remote controller at the
sensor on the indoor unit and
• If an air conditioner error occurs, the
press the HOUR button.
indoor unit's sensor emits an intermittent
buzzer sound, the operation light
flashes, and the check code is output.
(It takes 3 seconds at most for check
code to appear.)
4. Point the remote controller at the
sensor on the indoor unit and
• The check mode is cancelled.
press the ON/OFF button.
OCH582B
28
• Refer to the following tables for details on the check codes.
[Output pattern A]
Beeper sounds
OPERATION
INDICATOR
lamp flash
pattern
Beep
Beep Beep Beep
Off
Beep
1st
2 nd
3 rd
nth
On
On
On
On
Beep Beep
1st
Off
On
2 nd · · · Repeated
On
0.5 s
0.5 s 0.5 s
Approx. 2.5 s 0.5 s
0.5 s
0.5 s
Self-check Approx. 2.5 s
starts
(Start signal
Number of blinks/beeps in pattern indicates the check
Number of blinks/beeps in pattern indicates
received)
code in the following table (i.e., n=5 for “P5”)
the check code in the following table
[Output pattern B]
Beeper sounds
OPERATION
INDICATOR
lamp flash
pattern
Beep
Beep Beep Beep
Off
Self-check Approx. 2.5 s
starts
(Start signal
received)
On
Approx. 3 s
Beep
Beep
1st
2nd
3 rd
nth
1st
On
0.5 s
On
0.5 s
On
0.5 s
On
0.5 s
Off
Approx. 2.5 s
Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “U2”)
On
Approx. 3 s
On
0.5 s
Beep
2 nd · · · Repeated
On
0.5 s
Number of blinks/beeps in pattern indicates
the check code in the following table
[Output pattern A] Errors detected by indoor unit
Wireless remote controller Wired remote controller
Beeper sounds/OPERATION
INDICATOR lamp flashes
Check code
(Number of times)
1
P1
P2
2
P9
3
E6,E7
4
P4
P5
5
PA
6
P6
7
EE
8
P8
9
E4, E5
–
10
–
11
12
Fb (FB)*
14
PL
E0, E3
–
–
E1, E2
Symptom
Intake sensor error
Pipe (TH2) sensor error
Pipe (TH5) sensor error
Indoor/outdoor unit communication error
Drain sensor error/Float switch connector (CN4F) open
Drain pump error
Forced compressor stop (due to water leakage abnormality)
Freezing/Overheating protection operation
Communication error between indoor and outdoor units
Pipe temperature error
Remote controller signal receiving error
Remark
As for indoor
unit, refer to
indoor unit's
service manual.
–
–
Indoor unit control system error (memory error, etc.)
Abnormality of refrigerant circuit
Remote controller transmission error
Remote controller control board error
[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)
Wireless remote controller Wired remote controller
Beeper sounds/OPERATION
Symptom
INDICATOR lamp flashes
Check code
(Number of times)
Indoor/outdoor unit communication error
1
E9
(Transmitting error) (Outdoor unit)
Compressor overcurrent interruption
2
UP
Open/short of outdoor unit thermistors
3
U3,U4
Compressor overcurrent interruption (When compressor locked)
4
UF
5
Abnormal high discharging temperature/insufficient refrigerant
U2
Abnormal high pressure (63H operated)/Overheating
U1,Ud (UD)* protection operation
6
Abnormal temperature of heat sink
U5
7
Outdoor unit fan protection stop
8
U8
9
Compressor overcurrent interruption/Abnormal of power module
U6
–
–
10
Abnormality such as overvoltage or voltage shortage and
11
U9,UH
abnormal synchronous signal to main circuit/Current sensor error
–
–
12
–
–
13
Others
Other errors (Refer to the technical manual for the outdoor unit.)
14
Notes: 1. If the beeper does not sound again after the initial 2 beeps to confirm the self-check start signal was received and
the OPERATION INDICATOR lamp does not come on, there are no error records.
2. If the beeper sounds 3 times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 seconds)” after the initial 2 beeps to confirm
the self-check start signal was received, the specified refrigerant address is incorrect.
*The check code in the parenthesis indicates PAR-30/31MAA model.
OCH582B
29
10-4. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is put on>
Note: Refer to indoor unit section for codes starting with P and E.
Check Code
Abnormal points and detection method
Case
Judgment and action
1No voltage is supplied to terminal 1Check following items.
block (TB1) of outdoor unit.
a) Power supply breaker
a) Power supply breaker is turned
off.
b) Connection of power supply terminal
b) Contact failure or disconnection
block. (TB1)
of power supply terminal
c) Connection of power supply terminal
c) Open phase (L2 or N phase)
block. (TB1)
2Check following items.
2Electric power is not supplied to
power supply terminal of outdoor
power circuit board.
a) Connection of power supply terminal
a) Contact failure of power supply
block. (TB1)
terminal
b) Connection of terminal on outdoor
b) Open phase on the outdoor
power circuit board
power circuit board
(Disconnection of terminal on
outdoor power circuit board)
―
None
3Electric power is not supplied to
outdoor controller circuit board.
a) Disconnection of connector
(CNDC)
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
"10-9. TEST POINT DIAGRAM".
4Disconnection of reactor (DCL or
ACL4)
4 Check connection of reactor. (DCL or
ACL4) Refer to "8. WIRING DIAGRAM".
5Disconnection of outdoor noise fil- 5 a) Check connection of outdoor noise filter
ter circuit board or parts failure in circuit board.
b) Replace outdoor noise filter circuit
outdoor noise filter circuit board.
board. Refer to "10-9. TEST POINT
DIAGRAM".
6 Replace outdoor power circuit board.
6Defective outdoor power circuit
board
7Open of rush current protect resis- 7 Replace rush current protect resistor (RS).
Power circuit board might be short-circuit.
tor (RS)
Check the power circuit board. (Refer to
"10-9. TEST POINT DIAGRAM".)
8Defective outdoor controller circuit 8 Replace controller board (When items
above are checked but the units cannot be
board
repaired.)
F5
(5201)
63H connector open
1Disconnection or contact failure of
Abnormal if 63H connector circuit is open for
63H connector on outdoor control3 minutes continuously after power supply.
ler circuit board
63H: High-pressure switch
2Disconnection or contact failure of
63H
363H is working due to defective
parts.
4Defective outdoor controller circuit
board
OCH582B
30
1Check connection of 63H connector on
outdoor controller circuit board.
Refer to "10-9. 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)
Eb
(6845)
EC
(6846)
Abnormal points and detection method
Case
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. (4
units or more)
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.
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 can
not be set within 4 minutes after power
on because of miswiring (converse wiring
or disconnection) of 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.
1Contact failure or miswiring of
indoor/outdoor unit connecting
7Check if refrigerant addresses (SW1-3 to
wire
SW1-6 on outdoor controller circuit board)
2Diameter or length of indoor/outare overlapping in case of group control
door unit connecting wire is out of
system.
specified capacity.
4Defective transmitting receiving
8Check transmission path, and remove the
circuit of outdoor controller circuit
cause.
board
5Defective transmitting receiving cir- Note: The descriptions above, 1–8, are for
cuit of indoor controller board
EA, Eb and EC.
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.
Start-up time over
1Contact failure of indoor/outdoor
The unit cannot finish start-up process within
unit connecting wire
4 minutes after power on. 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.
OCH582B
Judgment and action
31
<Abnormalities detected while unit is operating>
Check Code
U1
(1302)
Abnormal points and detection method
Case
High pressure (High-pressure switch 63H 1Short cycle of indoor unit
2Clogged filter of indoor unit
operated)
Abnormal if high-pressure switch 63H (4.15 3Decreased airflow caused by dirt
MPa) operated during compressor operation. of indoor fan
4Dirt of indoor heat exchanger
5Locked indoor fan motor
6Malfunction of indoor fan motor
7Defective operation of stop valve
(Not full open)
8Clogged or broken pipe
9Locked outdoor fan motor
0Malfunction of outdoor fan motor
1Short cycle of outdoor unit
2Dirt of outdoor heat exchanger
3Decreased airflow caused by
defective inspection of outside
temperature thermistor
(It detects lower temperature than
actual temperature.)
4Disconnection or contact failure of
connector (63H) on outdoor controller board
5Disconnection or contact failure of
63H connection
6Defective outdoor controller board
7Defective action of linear expansion valve
8Malfunction of fan driving circuit
High comp. surface temperature
1. Abnormal if comp. surface temperature
thermistor (TH32) exceeds 125°C or 110°C
continuously for 5 minutes.
Abnormal if condenser/evaporator temperature
thermistor (TH5) exceeds 40°C during
defrosting and comp. surface temperature
thermistor (TH32) exceeds 110°C.
2. Abnormal if discharge superheat (Cooling: TH32−TH5 / Heating: TH32−TH6)
increases.
All the conditions in A or B are detected
simultaneously for 10 minutes continuously after 6 minutes past from compressor
start-up (including the thermostat indication or recovery from defrosting).
<Condition A>
U2
• Heating mode
• When discharge superheat is less than 70°C.
(TH32:1132) • 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.)
3. Abnormal if comp. surface temperature
thermistor (TH32) exceeds 125°C or
110°C continuously for 5 minutes.
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
U3
of compressor starting process and for 10
(TH32:5132)
minutes after and during defrosting.)
OCH582B
Judgment and action
1–6Check indoor unit and repair defect.
7Check if stop valve is fully open.
8Check piping and repair defect.
9–2 Check outdoor unit and repair defect.
3Check the detected temperature of outside
temperature thermistor on LED display.
(SW2 on A-Control Service Tool : Refer
to "10-10. FUNCTION OF SWITCHES,
CONNECTORS AND JUMPERS".)
4–6Turn 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.
7Check linear expansion valve.
Refer to "10-6. HOW TO CHECK THE
PARTS".
8Replace outdoor controller board.
1Overheated compressor operation 1Check intake superheat.
caused by shortage of refrigerant Check leakage of refrigerant.
Charge additional refrigerant.
2Defective operation of stop valve 2Check if stop valve is fully open.
3Defective thermistor
34Turn the power off and check if U3 is
displayed when the power is on again.
4Defective outdoor controller board
When U3 is displayed, refer to “Judgment
and action” for U3.
5Defective action of linear expansion valve
5Check linear expansion valve.
Refer to "10-6. HOW TO CHECK THE
PARTS".
1Disconnection or contact failure of 1Check connection of connector (TH32) on
the outdoor controller circuit board. Check
connector (TH32) on the outdoor
breaking of the lead wire for thermistor
controller circuit board
(TH32). Refer to "10-9. TEST POINT
2Defective thermistor
DIAGRAM".
3Defective outdoor controller circuit 2Check resistance value of thermistor
(TH32) or temperature by microprocessor.
board
(Thermistor/TH32: Refer to "10-6. HOW TO
CHECK THE PARTS".)(SW2 on A-Control
Service Tool: Refer to "10-10. FUNCTION
OF SWITCHES, CONNECTORS AND
JUMPERS".)
3Replace outdoor controller board.
32
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 mode
of SW2. (PAC-SK52ST)
U4
(Refer to "10-10. FUNCTION OF SWITCHES,
(TH3:5105) CONNECTORS AND JUMPERS".)
(TH6:5107)
(TH7:5106)
(TH8:5110)
Symbol
TH3
TH6
TH7
TH8
(
Judgment and action
)
Thermistors
Name
Thermistor <Liquid>
Thermistor <2-phase pipe>
Thermistor <Ambient>
Thermistor <Heat sink>
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
Temperature of heat sink
Abnormal if heat sink thermistor (TH8)
detects temperature indicated below.
P200/250Y········································· 90:
1The outdoor fan motor is locked. 12 Check outdoor fan.
2 Failure of outdoor fan motor
3 Check air flow path for cooling.
3 Air flow path is clogged.
4 Check if there is something which causes
4 Rise of ambient temperature
temperature rise around outdoor unit.
5 Defective thermistor
(Upper limit of ambient temperature is
6 Defective input circuit of outdoor
46°C.)
power circuit board
Turn off power, and on again to check if
7 Failure of outdoor fan drive circuit
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 "10-6. HOW TO CHECK
THE PARTS".)
(SW2 on A-Control Service Tool: Refer
to "10-10. FUNCTION OF SWITCHES,
CONNECTORS AND JUMPERS".)
6 Replace outdoor power circuit board.
7 Replace outdoor controller circuit board.
Power module
Check abnormality by driving power module
in case overcurrent is detected.
(UF or UP error condition)
1Outdoor stop valve is closed.
2Decrease of power supply voltage
3Looseness, disconnection or
converse of compressor wiring
connection
4Defective compressor
U5
(4230)
U6
(4250)
U8
(4400)
Case
1Disconnection or contact failure of 1 Check connection of connector (TH3,TH6/
connectors
TH7) on the outdoor controller circuit
Outdoor controller circuit
board. Check connection of connector
board: TH3, TH6/TH7
(CN3) on the outdoor power circuit board.
Outdoor power circuit board: CN3
Check breaking of the lead wire for
2Defective thermistor
thermistor (TH3,TH6,TH7,TH8). Refer to
3Defective outdoor controller circuit
"10-9. TEST POINT DIAGRAM"
board
2 Check resistance value of thermistor
(TH3,TH6,TH7,TH8) or check temperature
by microprocessor. (Thermistor TH3,TH6,
TH7, TH8: Refer to "10-6. HOW TO
CHECK THE PARTS".)
(SW2 on A-Control Service Tool: Refer
to "10-10. FUNCTION OF SWITCHES,
CONNECTORS AND JUMPERS.)
3Replace outdoor controller circuit board.
Note: Emergency operation is available
in case of abnormalities of TH3,
TH6 and TH7. Refer to "10-8.
EMERGENCY OPERATION".
5Defective outdoor power circuit
board
Outdoor fan motor
Abnormal if rotational frequency of the fan
motor is not detected during DC fan motor
operation.
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.
OCH582B
1 Failure in the operation of the
DC fan motor
2 Failure in the outdoor circuit
controller board
33
1Open stop valve.
2 Check facility of power supply.
3 Correct the wiring (U•V•W phase) to
compressor. Refer to "10-9. TEST POINT
DIAGRAM". (Outdoor power circuit board).
4 Check compressor referring to "10-6.
HOW TO CHECK THE PARTS".
5 Replace outdoor power circuit board.
1 Check or replace the DC fan motor.
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 points and detection method
Case
Judgment and action
Detailed To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6.
codes Refer to "10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS".
Overvoltage error
• Increase in DC bus voltage to
P200/250Y: 760 V
01
02
04
U9
(4220)
08
10
20
1 Abnormal increase in power source
voltage
2 Disconnection of compressor wiring
1 Check the field facility for the power
supply.
2 Correct the wiring (U.V.W phase) to
compressor. Refer to "10-9. TEST POINT
DIAGRAM" (Outdoor power circuit board).
3 Defective outdoor power circuit board 3 Replace outdoor power circuit board.
4 Compressor has a ground fault.
4 Check compressor for electrical insulation. Replace compressor.
Undervoltage error
1 Decrease in power source voltage,
• Instantaneous decrease in DC
instantaneous stop.
bus voltage to
2 Defective 52C drive circuit in outdoor
P200/250Y: 400 V
power circuit board
3 Disconnection or loose connection of
rush current protect resistor RS
4 Defective rush current protect
resistor RS
1 Check the field facility for the power
supply.
2 Replace outdoor power circuit board.
Input current sensor error/
1 L1-phase open
L1-phase open error
2 Disconnection or loose connection
between TB1 and outdoor noise filter
• Decrease in input current
through outdoor unit to 0.1 A
circuit board
only if operation frequency is 3 D
isconnection or loose connection
more than or equal to 40 Hz
of CN5 on the outdoor power circuit
or compressor current is more
board/CNCT on the outdoor noise filter
than or equal to 6 A.
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
heck the field facility for the power supply.
1C
2 Check the wiring between TB1 and out
door 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.
1 Distortion 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
3 Check RS wiring.
4 Replace RS.
3 Check CN5/CNCT wiring.
4R
eplace outdoor noise filter circuit board.
5 Replace outdoor power circuit board.
6 Replace outdoor controller circuit board.
1 Check the field facility for the power supply.
2 Check earth wiring.
3 Check CN2 wiring.
4 Replace outdoor controller circuit board.
5 Replace outdoor power circuit board.
PFC error (Overvoltage/
Not applicable for P200/250Y 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)
Check the switch setting for Model Select
on the outdoor controller circuit board.
PFC/IGBT error (Undervoltage) Not applicable for P200/250Y model.
• When Compressor is running,
DC bus voltage stays at 310V
or lower for consecutive 10
seconds
Check the switch setting for Model Select
on the outdoor controller circuit board.
Continue to the next page
OCH582B
34
Check Code
Ud
(UD)*
(1504)
Abnormal points and detection method
UL
(1300)
UP
(4210)
Judgment and action
1Defective outdoor fan (fan motor) 1Check outdoor unit air passage.
or short cycle of outdoor unit
during cooling operation
2Defective outdoor pipe thermistor 23 Turn the power off and on again to
check the check code. If U4 is displayed,
(TH3)
follow the U4 processing direction.
3Defective outdoor controller board
*The check code in the parenthesis indicates
PAR-30/31MAA model.
Compressor overcurrent interruption
(When compressor locked)
Abnormal if overcurrent of DC bus or
compressor is detected within 30 seconds
after compressor starts operating.
1Stop valve is closed.
2Decrease of power supply voltage
3Looseness, disconnection or converse of compressor wiring connection
4Defective compressor
UF
(4100)
UH
(5300)
Case
Over heat protection
Abnormal if outdoor pipe thermistor (TH3)
detects 70: or more during compressor
operation.
5Defective outdoor power board
6DIP switch setting difference of
outdoor controller circuit board
1Open stop valve.
2Check facility of power supply.
3Correct the wiring (U•V•W phase) to
compressor. Refer to "10-9. TEST POINT
DIAGRAM" (Outdoor power circuit board).
4Check compressor.
Refer to "10-6. 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
"10-10. FUNCTION OF SWITCHES,
CONNECTORS AND JUMPERS".
Current sensor error or input current error 1Disconnection of compressor
1 Correct the wiring (U•V•W phase) to
compressor. Refer to "10-9. TEST POINT
wiring
• Abnormal if current sensor detects −1.0A
DIAGRAM" (Outdoor power circuit board).
to 1.0A during compressor operation. (This
error is ignored in case of test run mode.) 2Defective circuit of current sensor 2Replace outdoor power circuit board.
on outdoor power circuit board
3Decrease of power supply voltage 3Check the facility of power supply.
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
TH5−Indoor room temperature [ 2°C
Detection mode 2
TH7−TH3 [ 2°C and
TH5−Indoor room temperature [ 4°C and
TH2−Indoor room temperature [ 4°C
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
1Check stop valve.
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 "10-6. HOW TO CHECK THE
PARTS".
4 After recovering refrigerant, remove water
4Clogging with foreign objects in
from entire refrigerant circuit under vacurefrigerant circuit
um more than 1 hour.
Note: Clogging occurs in the parts
which become below freezing
point when water enters in
refrigerant circuit.
Thermistor TH3: Outdoor liquid pipe temperature
TH5: Indoor cond./eva. temperature
TH6: Outdoor 2-phase pipe temperature
TH7: Ambient temperature
Compressor overcurrent interruption
1Stop valve of outdoor unit is
closed.
Abnormal if overcurrent DC bus or compressor is detected after compressor starts oper- 2Decrease of power supply voltage
ating for 30 seconds.
3Looseness, disconnection or converse of compressor wiring connection
4Defective fan of indoor/outdoor
units
5Short cycle of indoor/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
1Open stop valve.
2 Check facility of power supply.
3 Correct the wiring (U•V•W phase) to compressor. Refer to "10-9. TEST POINT
DIAGRAM". (Outdoor power circuit board).
4 Check indoor/outdoor fan.
5Solve short cycle.
6Replace outdoor controller circuit board.
7Check compressor. Refer to "10-6. HOW
TO CHECK THE PARTS".
efore the replacement of the outdoor controller
B
circuit 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.
8Replace outdoor power circuit board
9Check the DIP switch setting of outdoor
controller circuit board
OCH582B
35
Check Code
Abnormal points and detection method
Case
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
1 Abnormal if indoor controller board can
not receive normally any data from remote circuit of indoor controller board of
refrigerant address “0”
controller board or from other indoor controller board for 3 minutes. (Check code: 6Noise has entered into the transmission wire of remote controller.
E4)
2 Indoor controller board cannot receive any
signal from remote controller for 2 minutes. (Check code: E4)
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
Judgment and action
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.
•Total wiring length: maximum 500 m
(Do not use cable o 3 or more.)
•The number of connecting indoor units:
maximum 16 units
•The number of connecting remote controller: maximum 2 units
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.
Note: If the unit is not normal after replacing indoor
controller board in group control, indoor controller board of address “0” may be abnormal.
E1
or
E2
E3
or
E5
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)
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)
1Abnormal if indoor controller board could
not find blank of transmission path.
(Check code: E5) 2Indoor controller board 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: E5)
OCH582B
1Defective remote controller
1Replace remote controller.
12 remote controllers are set as
“main.” (In case of 2 remote controllers)
2Remote controller is connected
with 2 indoor units or more.
3Repetition of refrigerant address
4Defective transmitting receiving
circuit of remote controller
5Defective transmitting receiving
circuit of indoor controller board
6Noise has entered into
transmission wire of remote
controller.
1Set a remote controller to main, and the
other to sub.
36
2Remote controller is connected with only 1
indoor unit.
3The address changes to a separate
setting.
4−6 Diagnose remote controller.
a) When “RC OK” is displayed, remote
controllers have no problem.
Turn the power off, and on again to
check.
When becoming abnormal 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.
Check Code
E6
(6840
E7
E8
(6840)
E9
(6841)
Abnormal points and detection method
Case
Judgment and action
heck LED display on outdoor controller
C
1Contact failure, short circuit or
circuit board. (Connect A-Control service
miswiring (converse wiring) of
tool (PAC-SK52ST)) Refer to EA−EC item if
indoor/outdoor unit connecting
wire
LED displays EA−AC.
2Defective transmitting receiving
1Check disconnecting or looseness of
circuit of outdoor controller circuit
indoor/outdoor unit connecting wire of
board.
indoor unit or outdoor unit.
Check all the units in case of twin/triple/
3Defective transmitting receiving
circuit of indoor controller board.
quadruple indoor unit system.
4Noise has entered into indoor/
2–4Turn the power off, and on again to
outdoor unit connecting wire.
check.
If abnormality generates again, replace
5Defective fan motor
indoor controller board or outdoor controller
6Defective rush current resistor of
outdoor power circuit board
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 error 1Defective transmitting receiving
1–3 Turn the power off, and on again to
check. If abnormality generates again,
(Transmitting error)
circuit of indoor controller board
replace indoor controller board.
Abnormal if “1” receiving is detected 30
2Noise has entered into power
supply.
times continuously though indoor controller
board has transmitted “0”.
3Noise has entered into outdoor
control wire.
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.
Indoor/outdoor unit communication error 1Contact failure of indoor/outdoor
(Signal receiving error)
unit connecting wire
(Outdoor unit)
2Defective communication circuit of
outdoor controller circuit board
Abnormal if outdoor controller circuit board
could not receive anything normally for 3
3Defective communication circuit of
indoor controller board
minutes.
4Noise has entered into Indoor/
outdoor unit connecting wire.
Indoor/outdoor unit communication error 1Indoor/outdoor unit connecting
wire has contact failure.
(Transmitting error) (Outdoor unit)
2Defective communication circuit of
1Abnormal if “0” receiving is detected 30
times continuously though outdoor conoutdoor controller circuit board
troller circuit board has transmitted “1”.
3Noise has entered power supply.
2Abnormal if outdoor controller circuit board 4Noise has entered Indoor/outdoor
could not find blank of transmission path for
unit connecting wire.
3 minutes.
Non defined check code
This code is displayed when non defined
check code is received.
EF
(6607
or
6608)
OCH582B
1Check disconnection or looseness of
Indoor/outdoor unit connecting wire of
indoor or outdoor units.
2–4 Turn the power off, and on again to
check. Replace indoor controller board
or outdoor controller circuit board if
abnormality is displayed again.
1Check disconnection or looseness of
indoor/outdoor unit connecting wire.
2–4 Turn the power off, and on again to
check. Replace outdoor controller circuit board if abnormality is displayed
again.
1Noise has entered transmission
12 Turn the power off, and on again to
wire of remote controller.
check. Replace indoor controller board or
2Noise has entered Indoor/outdoor
unit connecting wire.
outdoor controller circuit board if
abnormality is displayed again.
3Outdoor unit is not a series of
power-inverter.
3Replace outdoor unit with power-inverter
type outdoor unit.
37
Check Code
Ed
(0403)
Abnormal points and detection method
Pipe temperature
<Cooling mode>
Detected as abnormal when the pipe
temperature is not in the cooling range
3 minutes after compressor start and
6 minutes after the liquid or condenser/
evaporator pipe is out of cooling range.
Note 1: It takes at least 9 minutes to detect.
Note 2: Abnormality P8 is not detected in
drying mode.
Cooling range :
Indoor pipe temperature (TH2 or
TH5)−intake temperature (TH1) [ −3:
TH: Lower temperature between liquid pipe
temperature and condenser/evaporator
temperature
P8
PL
Case
Serial communication error
1Breaking of wire or contact failure
1 Abnormal if serial communication between of connector CN2 between the
outdoor controller circuit board and outoutdoor controller circuit board
door power circuit board is defective.
and the outdoor 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
of outdoor power circuit board
4Defective communication circuit of
outdoor controller circuit board for
outdoor power circuit board
1Breaking of wire or contact fail2 Abnormal if communication between
ure of connector between outoutdoor controller circuit board and
door controller circuit board and
M-NET board is not available.
M-NET board
2Contact failure of M-NET board
power supply line
3Noise has entered into M-NET
transmission wire.
<Heating mode>
When 10 seconds have passed after the
compressor starts operation and the hot
adjustment mode has finished, the unit is
detected as abnormal when condenser/
evaporator pipe temperature is not in heating
range within 20 minutes.
Note 3: It takes at least 27 minutes to detect
abnormality.
Note 4: It excludes the period of defrosting
(Detection restarts when defrosting
mode is over)
Heating range:
3: [ (Condenser/ Evaporator
temperature(TH5)−intake
temperature(TH1))
Abnormal refrigerant circuit
During Cooling, Dry, or Auto 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.
OCH582B
Judgment and action
12 Check connection of each connector CN2
and CN4 between the outdoor controller
circuit board and the outdoor power circuit board.
3Replace outdoor power circuit board.
4Replace outdoor controller circuit board.
1Check disconnection, looseness, or breaking
of connection wire between outdoor controller circuit board (CNMNT) and M-NET board
(CN5).
2Check disconnection, looseness, or breaking
of connection wire between outdoor controller circuit board (CNMNT) and M-NET board
(CND).
3Check M-NET transmission wiring method.
1Slight temperature difference
1–4 Check pipe <liquid or condenser/
evaporator> temperature with room
between indoor room temperature
and pipe <liquid or condenser/
temperature display on remote controller
evaporator> temperature
and outdoor controller circuit board.
thermistor
Pipe <liquid or condenser/evaporator>
• Shortage of refrigerant
temperature display is indicated by set• Disconnected holder of
ting SW2 of outdoor controller circuit
pipe <liquid or condenser/
board as follows.
evaporator> thermistor
Conduct temperature check with outdoor
• Defective refrigerant circuit
controller circuit board after connecting
2 Converse connection of extension
pipe (on plural units connection)
‘A-Control Service Tool (PAC-SK52ST)’.
3 Converse wiring of indoor/outdoor
Temperature display of indoor condenser/
Temperature display of indoor liquid pipe
unit connecting wire (on plural
evaporator pipe Indoor 1
Indoor 1
3
1
2
3
4
5
6
1
2
4
5
6
units connection)
ON
ON
4 Defective detection of indoor
OFF
OFF
room temperature and pipe
Temperature display of indoor condenser/
Temperature display of indoor liquid pipe
<condenser/evaporator>
evaporator pipe Indoor 2
Indoor 2
temperature thermistor
1
2
3
4
5
6
1
2
3
4
5
6
ON
ON
5 Stop valve is not opened
OFF
OFF
completely.
(
)
A-Control Service Tool
SW2 setting
23 Check converse connection of extension
pipe or converse wiring of indoor/outdoor
unit connecting wire.
1Abnormal operation of 4-way valve
2 Disconnection of or leakage in
refrigerant pipes
3 Air into refrigerant piping
4 Abnormal operation (no rotation) of
indoor fan
· Defective fan motor
· Defective indoor control board
5 Defective refrigerant circuit
(clogging)
38
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.
4Refer to "10-6. HOW TO CHECK THE
PARTS".
5 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.
<M-NET communication error>
Check Code
A0
(6600)
Note: “Indoor unit” in the text indicates M-NET board in outdoor unit.
Case
Judgment and action
Abnormal points and detection method
Address duplicate definition
This error is displayed when transmission
from the units of same address is detected.
Note: The address and attribute displayed
at remote controller indicate the
controller that detected abnormality.
1There are 2 or more same
address of controller of outdoor
unit, indoor unit, FRESH
MASTER, or LOSSNAY.
2Noise has entered into
transmission signal and signal
was transformed.
Search the unit with same address as
abnormality occurred. If the same address
is found, shut the power supply of outdoor
unit and indoor unit and FRESH MASTER or
LOSSNAY at the same time for 2 minutes or
more after the address is corrected, and turn
the power on again.
Check transmission waveform or noise on
transmission wire.
A2
(6602)
Hardware error of transmission processor 1Error is detected if waveform is
1If the works of transmission wire is done
Transmission processor intended to transmit
with the power on, shut off the power
transformed when wiring works of
“0”, but “1” appeared on transmission wire.
supply of outdoor unit and indoor unit and
transmission wire of outdoor unit,
Note: The address and attribute display at
FRESH MASTER or LOSSNAY at the
indoor unit, FRESH MASTER or
remote controller indicate the controller LOSSNAY are done, or polarity is
same time for 2 minutes or more, and turn
that detected abnormality.
the power on again.
changed with the power on and
transmission data collide each
2Check transmission waveform or noise on
transmission wire.
other.
2Defective transmitting receiving
circuit of transmission processor
3Transmission data is changed by
the noise on transmission
A3
(6603)
BUS BUSY
1Transmission processor could
not transmit signal because short
1.Overtime error by collision damage
cycle voltage of noise and the like
Abnormal if transmitting is not possible for
8 to 10 minutes continuously because of
have entered into transmission
collision of transmission.
wire continuously.
2.Data could not reach transmission wire for 2Transmission quantity has
8 to 10 minutes continuously because of
increased and transmission is
noise, etc.
not possible because there was
Note: The address and attribute displayed
wiring mistake of terminal block
at remote controller indicate the
for transmission wire (TB3) and
controller that detected abnormality.
terminal block for central control
(TB7) in outdoor unit.
3Transmission are mixed with
others and occupation rate on
transmission wire rose because
of defective repeater (a function
to connector or disconnect
transmission of control and
central control system) of outdoor
unit, then abnormality is detected.
1Check if transmission wire of indoor unit,
FRESH MASTER, LOSSNAY, or remote
controller is not connected to terminal block
for central control (TB7) of outdoor unit.
2Check if transmission wire of indoor
unit, FRESH MASTER or LOSSNAY
is not connected to terminal block for
transmission wire of outdoor unit.
3Check if terminal block for transmission
wire (TB3) and terminal block for central
control (TB7) is not connected.
4Check transmission waveform or noise on
transmission wire.
Communication error with communication 1Data of transmission processor or
processor
unit processor is not transmitted
Defective communication between unit
normally because of accidental
processor and transmission processor
trouble such as noise or thunder
Note: The address and attribute display at
surge.
remote controller indicate the controller 2Address forwarding from unit
that detected abnormality.
processor is not transmitted
normally because of defective
transmission processor hardware.
Turn off the power supply of outdoor
unit, indoor unit and FRESH MASTER or
LOSSNAY at the same time for 2 minutes or
more, and turn the power on again. System
returns normally if abnormality was accidental
malfunction. If the same abnormality
generates again, abnormality-generated
controller may be defective.
A6
(6606)
OCH582B
39
Check Code
A7
(6607)
Abnormal points and detection method
Case
NO ACK signal
1.Transmitting side controller detects
abnormal if a message was transmitted
but there is no reply (ACK) that a
message was received. Transmitting side
detects abnormality every 30 seconds, 6
times continuously.
Note: The address and attribute displayed
at remote controller indicate the
controller that did not reply (ACK).
Common factor that has no relation
with abnormality source
1The unit of former address does
not exist as address switch has
changed while the unit was
energized.
2Extinction of transmission wire
voltage and signal is caused by
over-range transmission wire.
• Maximum distance.......200 m
•Remote controller line..(12 m)
3Extinction of transmission wire
voltage and signal is caused by
type-unmatched transmission
wire.
Type......
With shield wire
CVVS, CPEVS
With normal wire (no shield)
VCTF, VCTFK, CVV CVS, VVR, VVF, VCT
Diameter.....1.25 mm2 or more
4Extinction of transmission wire
voltage and signal is caused by
over-numbered units.
5Accidental malfunction of
abnormality-detected controller
(noise, thunder surge)
6Defective of abnormalitygenerated controller
2.If displayed address or attribute is outdoor
unit, indoor unit detects abnormality when
indoor unit transmits signal to outdoor unit
and there was no reply (ACK).
3.If displayed address or attribute is indoor
unit, remote controller detects abnormality
when remote controller transmits signal to
indoor unit and there was no reply (ACK).
Judgment and action
Always try the following when the error
“A7” occurs.
1Turn off the power supply of outdoor
unit, indoor unit and FRESH MASTER or
LOSSNAY at the same time for 2 minutes
or more, and turn the power on again. If
malfunction was accidental, the unit returns
to normal.
2Check address switch of abnormalitygenerated address.
3Check disconnection or looseness of
abnormality-generated or abnormalitydetected transmission wire (terminal block
and connector)
4Check if tolerance range of transmission
wire is not exceeded.
5Check if type of transmission wire is correct
or not.
If the cause of trouble is in 1–5 above,
repair the defect, then turn off the power
supply of outdoor unit, indoor unit and FRESH
MASTER or LOSSNAY at the same time for
2 minutes or more, and turn the power on
again.
• If the cause of trouble is not in 1–5 above
in single refrigerant system (one outdoor
unit), controller of displayed address or
attribute is defective.
1Contact failure of transmission
wire of outdoor unit or indoor unit •If the cause of trouble is not in 1–5 above
in different refrigerant system (2 or more
2Disconnection of transmission
connector (CN2M) of outdoor unit outdoor units), judge with 6.
3Defective transmitting receiving
6If address of abnormality source is the
circuit of outdoor unit or indoor
address that should not exist, there is the
unit
unit that memorizes nonexistent address
information. Delete useless address
information with manual setting function of
remote controller.
This applies only to the system FRESH
MASTER or LOSSNAY is connected to,
or the system that is equipped with group
1During group operation with
setting of different refrigerant system.
indoor unit of multi-refrigerant
system, if remote controller
transmits signal to indoor unit
while outdoor unit power supply
of one refrigerant system is
turned off or within 2 minutes of
restart, abnormality is detected.
2Contact failure of transmission
wire of remote controller or indoor
unit
3Disconnection of transmission
connector (CN2M) of indoor unit
4Defective transmitting receiving
circuit of indoor unit or remote
controller
If the cause of trouble is not any of 1–6
above, replace the controller board of
displayed address or attribute.
If the unit does not return normally, multi
controller board of outdoor unit may be
defective (repeater circuit).
Replace multi controller board one by one to
check if the unit returns normally.
Continue to the next page
OCH582B
40
Check Code
Abnormal points and detection method
Case
Judgment and action
Same as mentioned in “A7” of the previ4.If displayed address or attribute is remote 1During group operation with
indoor unit of multi-refrigerant
ous page.
controller, indoor unit detects abnormalsystem, if indoor unit transmits
ity when indoor unit transmits signal to
signal to remote controller while
remote controller and there was no reply
outdoor unit power supply of one
(ACK).
refrigerant system is turned off or
within 2 minutes of restart, abnormality is detected.
2Contact failure of transmission
wire of remote controller or indoor
unit
3Disconnection of transmission
connector (CN2M) of indoor unit
4Defective transmitting receiving
circuit of indoor unit or remote
controller
A7
(6607)
5.If displayed address or attribute is FRESH 1During sequential operation of
indoor unit and FRESH MASTER
MASTER, indoor unit detects abnormalof other refrigerant system, if
ity when indoor unit transmits signal to
indoor unit transmits signal to
FRESH MASTER and there was no reply
FRESH MASTER while out(ACK).
door unit power supply of same
refrigerant system with FRESH
MASTER is turned off or within 2
minutes of restart, abnormality is
detected.
2Contact failure of transmission
wire of indoor unit or FRESH
MASTER
3Disconnection of transmission
connector (CN2M) of indoor unit
or FRESH MASTER
4Defective transmitting receiving
circuit of indoor unit or FRESH
MASTER
6.If displayed address or attribute is
1If the power supply of LOSSNAY
is off, indoor unit detects abnorLOSSNAY, indoor unit detects abnormalmality when it transmits signal to
ity when indoor unit transmits signal to
LOSSNAY.
LOSSNAY and there was no reply (ACK).
2During sequential operation of
indoor unit and LOSSNAY of
other refrigerant system, if indoor
unit transmits signal to LOSSNAY
while outdoor unit power supply
of same refrigerant system with
LOSSNAY is turned off or within 2
minutes of restart, abnormality is
detected.
3Contact failure of transmission
wire of indoor unit of LOSSNAY
4Disconnection of transmission
connector (CN2M) of indoor unit
5Defective transmitting receiving
circuit of indoor unit or LOSSNAY
7.If displayed address or attribute is nonex- 1The unit of former address does
not exist as address switch has
istent.
changed while the unit was energized.
2Abnormality is detected when
indoor unit transmits signal
because the address of FRESH
MASTER and LOSSNAY are
changed after sequential operation of FRESH MASTER and
LOSSNAY by remote controller.
OCH582B
41
Check Code
A8
(6608)
Abnormal points and detection method
Case
Judgment and action
M-NET NO RESPONSE
1Transmitting condition is repeated 1Check transmission waveform or noise on
transmission wire.
fault because of noise and the
Abnormal if a message was transmitted and
there were reply (ACK) that message was
like.
2Turn off the power supply of outdoor unit
and indoor unit and FRESH MASTER or
received, but response command does not 2Extinction of transmission wire
LOSSNAY at the same time for 2 minutes
voltage and signal is caused by
return. Transmitting side detects abnormality
or more, and turn the power on again. If
over-range transmission wire.
every 30 seconds, 6 times continuously.
malfunction was accidental, the unit returns
• Maximum distance ...... 200 m
Note: The address and attribute displayed at
to normal. If the same abnormality generremote controller indicate the control•Remote controller line矣 (12 m)
ates again, controller of displayed address
ler that did not reply (ACK).
3Extinction of transmission wire
and attribute may be defective.
voltage and signal is caused by
type-unmatched transmission
wire.
Type.........
With shield wire
CVVS, CPEVS
With normal wire (no shield)
VCTF, VCTFK, CVV
CVS, VVR, VVF, VCT
Diameter ..... 1.25 mm2 or more
4Accidental malfunction of abnormality-generated controller
10-5. TROUBLESHOOTING OF PROBLEMS
Phenomena
1. Remote controller display does not
work.
Factor
Countermeasure
1Check LED2 on indoor controller board.
1 12 V DC is not supplied to remote controller.
(1) When LED2 is lit.
(Power supply display is not indicated on LCD.)
Check the remote controller wiring for
21
2–15 V DC is supplied to remote controller, however,
no display is indicated.
breaking or contact failure.
• “PLEASE WAIT” is not displayed.
(2) When LED2 is blinking.
• “PLEASE WAIT” is displayed.
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
on the remote controller.
WAIT” is displayed to start up.
2Self-diagnosis of remote controller
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
3C
ommunication error between the indoor and outdoor unit communication error. Check LED3 on
indoor controller board.
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 "10-10. FUNCTION
OF SWITCHES, CONNECTORS AND
JUMPERS".
Check protection device connector (63H)
for contact failure.
Refer to "10-9. 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.
OCH582B
42
Phenomena
Factor
4. Even controlling by the wireless
1 The pair number settings of the wireless remote
remote controller, no beep is heard
controller and indoor controller board are
and the unit does not start operating.
mismatched.
Operation display is indicated on
wireless remote controller.
Countermeasure
1 Check the pair number settings.
5. When operating by the wireless
remote controller, beep sound is
heard, however, unit does not start
operating.
1 Normal operation
1 No operation for 2 minutes at most after the power
supply ON.
2 Normal operation
2 Local remote controller operation is prohibited.
• Remote controlling adaptor is connected to CN32 on
the indoor controller board.
• Local remote controller operation is prohibited by
centralized controller, etc. since it is connected to
MELANS.
3 Phenomena of No.2.
3 Check the phenomena No.2.
6. Remote controller display works
normally and the unit performs
cooling operation, however, the
capacity cannot be fully obtained.
(The air does not cool well.)
1 Refrigerant shortage
2 Filter clogging
3 Heat exchanger clogging
4 Air duct short cycle
1 • If refrigerant leaks, discharging
temperature rises and LEV opening
increases. Inspect leakage by checking
the temperature and opening.
• Check pipe connections for gas leakage.
2 Open intake grille and check the filter.
Clean the filter by removing dirt or dust on it.
3 • If the filter is clogged, indoor pipe
temperature rises and discharging
pressure increases. Check if heat
exchanger is clogged by inspecting
discharging pressure.
• Clean the heat exchanger.
4 Remove the blockage.
7. 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 Filter clogging
5 Heat exchanger clogging
6 Air duct short cycle
7 Bypass circuit of outdoor unit fault
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 Open intake grille and check the filter.
Clean the filter by removing dirt or dust
on it.
5 • If the filter is clogged, indoor pipe
temperature rises and discharging
pressure increases. Check if heat
exchanger is clogged by inspecting
discharging pressure.
• Clean the heat exchanger.
6 Remove the blockage.
7 Check refrigerant system during operation.
8. 1 For 3 minutes after temperature
12 Normal operation
(For protection of compressor)
adjuster turns off, the 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.)
OCH582B
43
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 start-up 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
OCH582B
44
• 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
(TB4) of the indoor unit which
is used to connect the indoor
unit and the outdoor unit.
198 to 264 V AC?
YES
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.
• Defective indoor
controller board
• Replace the indoor
controller board.
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
Check the voltage of indoor
controller board (CN2D).
12 to 16 V DC?
YES
NO
Check the voltage of the unit after
removing the indoor power board
(CN2S).
12 to 16 V DC?
YES
NO
• Miswiring, breaking
• Check if there is miswiring
or poor connection of or breaking of wire.
indoor/outdoor
connecting wire
NO
• Defective indoor
power board
OCH582B
45
• Replace the indoor
power board.
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 (TB4)
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
• Not abnormal
• Influence of
electromagnetic noise There may be the influence
of electromagnetic noise.
Check the transmission wire
and get rid of the causes.
NO
YES
OCH582B
46
• 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 (TB6) of
the remote 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 (TB5)
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 (TB5) 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
OCH582B
47
• 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
on the display of remote
devices of the air conditioner are actuated.
controller.
What is check code?
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
while that time.
2 “FILTER” is displayed on the
screen.
2 This indicates that it is time to clean the air filters.
Clean the air filters. Press the FILTER button on
the remote controller twice to clear “FILTER” from
the display.
See the operation manual that came with the
product for how to clean the filters.
3 “STANDBY” is displayed on the 3 This 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.
4 “DEFROST” is displayed on
4 The outdoor unit gets frosted when the outside
the screen. (No air comes out of
temperature is low and the humidity is high.
the unit.)
“DEFROST” indicates the DEFROST
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.
OCH582B
48
Refer to “SELF-DIAGNOSIS
ACTION TABLE”.
Check if servicing is
required for the error.
Display time of “FILTER”
depends on the model.
Long life filter: 2500 hrs.
Standard filter: 100 hrs.
Phone Calls From Customers
How to Respond
Note
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.
2 Check if filters are not dirty and clogged. If filters
are clogged, the airflow amount will be reduced
and the unit capacity will be lowered. See the
instruction manual that came with the product for
how to clean the filters.
1 A gas escaping sound is heard
Sound
comes out
sometimes.
from the air
conditioner.
2 A cracking sound is heard
sometimes.
3 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.
Something 1 The fan speed does not match
is wrong
the setting of the remote
with the
controller during DRY
blower…..
operation.(No air comes out
sometimes during DRY
operation.)
1 This is not a malfunction.
During the DRY operation, the blower’s ON/OFF is
controlled by the microcomputer to prevent
overcooling and to ensure efficient dehumidification.
The fan speed cannot be set by the remote
controller during DRY operation.
2 The fan speed does not match
the setting of the remote
controller in HEAT operation.
2 This is not a malfunction.
1) When the HEAT operation starts, to prevent the
unit from blowing cold air, the fan speed is
gradually increased from zero to the set speed,
in proportion to the temperature rise of the
discharged air.
2) When the room temperature reaches the set
temperature and the outdoor unit stops,
the unit starts the LOW AIR operation.
3) During the HEAT operation, the DEFROST
operation is performed to defrost the outdoor
unit. During the DEFROST operation, the
blower is stopped to prevent cold air coming
out of the indoor unit.
OCH582B
49
The up/down vane will be
automatically set to
horizontal blow in these
cases listed up on the left
(1–3). After a while, the
up/down vane will be
automatically moved
according to the setting of
the remote controller.
Phone Calls From Customers
Something 3 Air blows out for a while after
is wrong
HEAT operation is stopped.
with the
blower…..
How to Respond
Note
3 This is not a malfunction.
The blower is operating just for cooling down the
heated-up air conditioner. This will be done within
1 minute.
This control is conducted only when the HEAT
operation is stopped with the electric heater ON.
However, this control is also
applied to the models which
has no electric heater.
Something 1 The airflow direction is changed 1 If the up/down vane is set to downward in COOL
is wrong
during COOL operation.
operation, it will be automatically set to horizontal
with the
blow by the microcomputer in order to prevent
airflow
water from dropping down.
direction….
“1 Hr.” will be displayed on the remote controller if
the up/down vane is set to downward with the fan
speed set to be less than “LOW”.
2 The airflow direction is changed 2 In HEAT operation, the up/down vane is
during HEAT operation.
automatically controlled according to the
temperature of the indoor unit’s heat exchanger.
(The airflow direction cannot be
In the following cases written below, the up/down
set by remote controller.)
vane will be set to horizontal blow, and the setting
cannot be changed by remote controller.
1) At the beginning of the HEAT operation
2) While the outdoor unit is being stopped by
thermostat or when the outdoor unit gets started
to operate.
3) During DEFROST operation
The airflow direction will be back to the setting of
remote controller when the above situations are
released.
“STANDBY” will be displayed
on the remote controller in
case of 1 and 2.
“DEFROSTING” will be
displayed on the screen in
case of 3.
3 The airflow direction does not
3 1) Check if the vane is set to a fixed position.
(Check if the vane motor connector is
change.
removed.)
(Up/down vane, left/right louver)
2) Check if the air conditioner has a function for
switching the air direction.
3) If the air conditioner does not have that
function, “NOT AVAILABLE” will be displayed
on the remote controller when “AIR
DIRECTION” or “LOUVER” button is pressed.
The air conditioner starts operating even though
any buttons on the remote controller are not
pressed.
1 Check if you set ON/OFF timer.
The air conditioner starts operating at the time
designated if ON timer has been set before.
2 Check if any operations are ordered by distant
control system or the central remote controller.
While “CENTRALLY CONTROLLED INDICATOR”
is displayed on the remote controller, the air
conditioner is under the control of external
directive.
There might be a case that
“CENTRALLY CONTROLLED
INDICATOR” will not be
displayed.
3 Check if power is recovered from power failure
(black out).
The units will automatically start operating when
power is recovered after power failure (black out)
occurs. This function is called “auto recovery
feature from power ”.
The air conditioner stops even though any
1 Check if you set ON/OFF timer.
buttons on the remote controller are not pressed.
The air conditioner stops operating at the time
designated if OFF timer has been set before.
2 Check if any operations are ordered by distant
control system or the central remote controller.
While “CENTRALLY CONTROLLED INDICATOR” is
displayed on the remote controller, the air conditioner is
under the control of external directive.
OCH582B
50
There might be a case that
“CENTRALLY
CONTROLLED INDICATOR”
will not be displayed.
Phone Calls From Customers
How to Respond
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.
OCH582B
51
Note
10-6. HOW TO CHECK THE PARTS
PUHZ-P200YKA.UKPUHZ-P250YKA.UK
PUHZ-P200YKAR1.UKPUHZ-P250YKAR1.UK
Check points
Parts name
Thermistor (TH3)
<Liquid>
Thermistor (TH6)
<2-phase pipe>
Thermistor (TH7)
<Ambient>
Thermistor (TH8)
<Heat sink>
Thermistor (TH32)
<Comp. Surface>
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
P200/250
Open or short
1215 ± 122 "
Motor for compressor Measure the resistance between the terminals with a tester.
U
(Winding temperature 20°C)
(MC)
V
W
Normal
Abnormal
Refer to “5-3. 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
OCH582B
Normal
Gray - Black
Gray - Red
Gray - Yellow
46 ± 3 "
52
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.
Did the fuse blow?
Yes
No
Replace the outdoor controller circuit board
(C.B) and fan motor (MF1, 2).
Wiring contact check
Contact of fan motor connector (CNF1, 2)
Is there contact failure?
Yes
Recover wiring.
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?
Yes
Yes
No
Check the operation of fan.
Replace the outdoor
controller circuit board.
Fail
Replace the outdoor controller circuit board.
OK
Check the operation.
Replace the fan motor.
END
Fail
Replace the fan motor.
OCH582B
53
OK
END
10-7. HOW TO CHECK THE COMPONENTS
<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
4.3 k"
30:
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"
4 k"
90:
100
50
0
25
50
75
100
Temperature (:)
125
500
High temperature thermistor
• Thermistor <Comp. Surface> (TH32)
400
Resistance (k")
Thermistor R120 = 7.465 k" ± 2%
B constant = 4057 ± 2%
1
1
Rt =7.465exp{4057( 273+t – 393)}
20:
30:
40:
50:
60:
250
160
104
70
48
k"
k"
k"
k"
k"
70:
34 k"
24 k"
80:
90: 17.5 k"
100: 13.0 k"
110: 9.8 k"
300
200
100
0
OCH582B
54
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
LEV-B
LEV-C
<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 power 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)
OCH582B
55
(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
OCH582B
56
10-8. EMERGENCY OPERATION
(1) When any check codes shown below is displayed on outdoor unit, or microcomputer for wired remote controller or indoor
unit has a failure while no other problems are found, emergency operation will be available by setting the emergency operation switch (SWE) ON and short-circuiting the connector (CN31) on outdoor controller board.
●When following abnormalities occur, emergency operation will be available.
Check code Inspected content
U4
Open/short of outdoor unit thermistor (TH3/TH6/TH7/TH8)
E8
Indoor/outdoor unit communication error • Signal receiving error (Outdoor unit)
E9
Indoor/outdoor unit communication error • Transmitting error (Indoor unit)
E0–E7
Ed
Communication error other than outdoor unit
Communication error between outdoor controller board and M-NET board (Serial communication error)
(2) Check the following items and cautions for emergency operation
1 Make sure that there is no abnormality in outdoor unit other than the above abnormalities. (Emergency operation will not
be available when check code other than the above are indicated.)
2 For emergency operation, it is necessary to set the emergency operation switch (SWE) on indoor controller board. Refer
to the electrical wiring diagram of indoor unit for how to set the indoor unit.
3 During emergency operation, the air-conditioner will continuously be operated by supplying power and stopping it: It can
not be turned on or off by remote control, and temperature control is not possible.
4 Do not perform emergency heating operation for an extended period of time: If the outdoor unit starts defrosting during
this period, cold air will blow out from the indoor unit.
5 Do not perform emergency cooling operation for more than 10 hours: Neglecting this could result in freezing the heat
exchanger in indoor unit.
(3) Emergency operation procedure
1 Turn the main power supply off.
2 Turn on the emergency operation switch (SWE) on indoor controller board.
3 Set the shorting pins of emergency operation connector (CN31) on outdoor controller board to ON.
4 Use SW4-2 on outdoor controller board to set the operation mode (cooling or heating). (SW4-1 is not used.)
CN31
SW4
ON
1
2
Heating
ON
Cooling
OFF
Shorting pins
5 Turning the main power supply on will start the emergency operation.
(4) Releasing emergency operation
1 Turn the main power supply off.
2 Set the emergency operation switch (SWE) on indoor controller board to OFF.
3 Set the shorting pins of emergency operation connector (CN31) on outdoor controller
board to OFF.
4 Set SW4-2 on outdoor controller board as shown in the right.
Note: If shorting pins are not set on emergency operation connector (CN31), the setting remains OFF.
OCH582B
57
SW4
Heating
ON
1
2
Cooling
(5) Operation data during emergency operation
During emergency operation, no communication is performed with the indoor unit, so the data items needed for operation
are set to the following values:
Operation mode
Operation data
Remarks
COOL
HEAT
Intake temperature (TH1)
27:
20.5:
—
Indoor pipe temperature (TH2)
5:
45:
—
Indoor 2-phase pipe temperature (TH5)
5:
50:
—
Set temperature
25:
22:
—
Outdoor liquid pipe temperature (TH3)
45:
5:
(*1)
Outdoor comp. surface temperature (TH32)
80:
80:
(*1)
Outdoor 2-phase pipe temperature (TH6)
50:
5:
(*1)
Outdoor ambient temperature (TH7)
35:
7:
(*1)
Temperature difference code
(room temperature - set temperature) (∆Tj)
Discharge superheat (SHd)
5
5
30:
30:
(*2)
Sub-cool (SC)
5:
5:
(*2)
—
*1. If the thermistor temperature data is normal (not open/short), that data is loaded into the control as valid data.
When the unit enters emergency operation and TH values are mismatched, set the thermistors to open/short.
And the unit runs emergency operation with the values listed above.
*2. If one thermistor is set to open/short, the values for SHd/SC will be different from the list above.
[Example] When liquid temperature thermistor (TH3) has an open or short circuit.
Thermistor
COOL
HEAT
TH3
45:
5:
Ta
Tb
TH6
TH32
Regard normal figure as effective data.
Tc
Td
Regard normal figure as effective data.
TH5
5:
50:
TH2
5:
45:
Discharge superheat (SHd)
Cooling = TH32−TH6 = Tc−Ta
Heating = TH32−TH5 = Td−50
Degree of subcooling (SC)
Cooling = TH6−TH3 = Ta−45
Heating = TH5−TH2 = 50−45 = 5:
OCH582B
58
10-9. TEST POINT DIAGRAM
Outdoor controller circuit board
PUHZ-P200YKA.UK
PUHZ-P250YKA.UK
PUHZ-P200YKAR1.UKPUHZ-P250YKAR1.UK
SW1
Forced defrost,
detect history
record reset,
refrigerant address
SW7
Demand control setting
<CAUTION> TEST POINT1 is high voltage.
CNDM
1–2: Input of low-level sound priority mode
1–3: 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
CNMNT
Connect to
M-NET adapter (CN5)
21S4
4-way valve
CNVMNT
Connect to
M-NET adapter (CND)
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)
OCH582B
CNS
S1–S2: 230 V AC
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)
CNDC
250–330 V DC
(1+, 3−)
(Noise filter circuit board)
59
+ −
Communication power supply
D71 Voltage
24 V DC
Outdoor noise filter circuit board
PUHZ-P200YKA.UK
PUHZ-P250YKA.UK
PUHZ-P200YKAR1.UKPUHZ-P250YKAR1.UK
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
OCH582B
LO1, LO2, LO3
POWER SUPPLY
(Connect to the
outdoor power
circuit board (CN5))
LO1-LO2/LO2-LO3/LO3-LO1: 400 V AC OUTPUT
(Connect to the outdoor power circuit board (TB-L1, L2, L3))
60
Outdoor power circuit board
PUHZ-P200YKA.UK
PUHZ-P250YKAR1.UK
PUHZ-P200YKA.UK
PUHZ-P250YKAR1.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
OCH582B
61
Outdoor M-NET board (optional)
LED13
Receiving
CN2M
ConnecttoM-NET
LED12
Transmitting
LED11
Outdoorunit
connectingdisplay
SW1
Switchforcommunication
displaybetween
M-NETandoutdoorboard
CN5
Serialcommunication
withoutdoorboard
LED2
Energizing
displayof
M-NETboard
(5Vpowersupply)
CND
Powersupply(5V/12V)input
2 to 35VDCInput
1, 2 : +
1 to 312VDCInput 3:–
)[
LED1
Energizingdisplay
ofM-NETboard
(12Vpowersupply)
]
SW12
M-NETaddress
(10sdigit)
SW11
M-NETaddress(1sdigit)
)
10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS
Theblacksquare( )indicatesaswitchposition.
(1) Function of switches
Type
of Switch No.
switch
1
Forced defrost *1
2
Abnormal history clear
3
Dip
switch
SW1
Action by the switch operation
Function
4
Refrigerant address setting
5
OFF
Start
Normal
When compressor is working
in heating operation. *1
Normal
off or operating
Clear
ON
ON
ON
ON
1 2 3 4 5 6
0
ON
1 2 3 4 5 6
1
ON
1 2 3 4 5 6
2
ON
1 2 3 4 5 6
3
ON
1 2 3 4 5 6
4
1 2 3 4 5 6
5
1 2 3 4 5 6
6
1 2 3 4 5 6
7
ON
ON
1 2 3 4 5 6
8
ON
6
SW4
Push
switch
ON
1 2 3 4 5 6
9
ON
1 2 3 4 5 6
12
ON
1 2 3 4 5 6
10
ON
1 2 3 4 5 6
13
When power supply ON
1 2 3 4 5 6
11
ON
1 2 3 4 5 6
14
1 2 3 4 5 6
15
1
Test run
Operating
OFF
2
Test run mode setting
Heating
Cooling
Pump down
Start
Normal
SWP
Effective timing
ON
Under suspension
Under suspension
*1Forceddefrostshouldbedoneasfollows.
1ChangetheDIPSW1-1ontheoutdoorcontrollerboardfromOFFtoON.
2Forceddefrostwillstartbytheaboveoperation1ifalltheseconditionswrittenbelowaresatisfied.
•Heatmodesetting
•10minuteshavepassedsincecompressorstartedoperatingorpreviouscompulsorydefrostingfinished.
•Pipetemperatureislessthanorequalto8°C.
Forceddefrostwillfinishifcertainconditionsaresatisfied.
ForceddefrostcanbedoneifaboveconditionsaresatisfiedwhenDIPSW1-1ischangedfromOFFtoON.
AfterDIPSW1-1ischangedfromOFFtoON,thereisnoproblemifDIPSW1-1isleftONorchangedtoOFFagain.
Thisdependsontheserviceconditions.
OCH582B
62
Continuetothenextpage
Type of
Switch No.
Switch
SW5
SW7*4
SW8
DIP
switch
SW9
Function
Action by the switch operation
ON
OFF
—
—
1
No function
2
Power failure
automatic recovery *2
Auto recovery
No auto recovery
When power supply ON
3,4,5
No function
—
—
—
6
1
2
3
4
5
6
1
2
3
1
2
3,4
Model select
Mode select *3
No function
Max Hz setting (cooling)
Max Hz setting (heating)
No function
Defrost setting
No function
No function
No function
No function
Function switch
No function
3
ON
200Y OFF
4
Model select
6
ON
250Y OFF
7
8
SW5
Always
—
Always
Always
—
Always
—
—
—
—
Always
—
The black square (■) indicates a switch position.
MODEL
SW6
SW5-6*5
2
5
—
Following SW5-6 reference
Demand function
Low noise mode
—
—
Max Hz (cooling) o 0.8
Normal
Max Hz (heating) o 0.8
Normal
—
—
For high humidity
Normal
—
—
—
—
—
—
—
—
Valid
Normal
—
—
1
SW6
Effective timing
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
ON
OFF
ON
OFF
1 2 3 4 5 6
1 2 3 4 5 6
6
*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
OCH582B
63
(2) Function of connector
Action by open/ short operation
Types
Connector
Function
Connector
CN31
Emergency operation
Short
Open
Start
Normal
Effective timing
When power supply ON
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
D
Orange
X
X
F
Brown
SW1
CNDM
1
Red
B
3
ACircuit diagram example
(low noise mode)
BOn-site arrangement
CExternal input adapter
(PAC-SC36NA-E)
X: Relay
DOutdoor unit control board
EMaximum 10 m
FPower supply for relay
E
(b) On demand control (Local wiring)
By performing the following modification, energy consumption can be reduced to 0–100% of the normal consumption.
The demand function 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.
1Complete the circuit as shown when using the external input adapter (PAC-SC36NA-E). (Option)
2By setting SW7-1 on the control board of the outdoor unit, the energy consumption (compared to the normal consumption) can
be limited as shown below.
SW7-1
Demand
function
ON
SW2
OFF
ON
ON
OFF
A
SW3
OFF
OFF
ON
ON
Energy consumption
100%
75%
50%
0% (Stop)
C
X
Y
F
SW2
SW3
Orange
X
Brown
Red
Y
B
OCH582B
D
CNDM
1
3
ACircuit diagram example
(Demand function)
BOn-site arrangement
X, Y: Relay
E
64
CExternal input adapter
(PAC-SC36NA-E)
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.
Check
code
*1
F5
Inspection method
1Check if connector (63H) on the outdoor controller board is
not disconnected.
2Check continuity of pressure switch (63H) by tester.
P.30
— 1Check if indoor/outdoor connecting wire is connected correctly. P.31
2Check if 4 or more indoor units are connected to outdoor unit. (EA)
— 3Check if noise entered into indoor/outdoor connecting wire P.31
or power supply.
(Eb)
4Re-check error by turning off power, and on again.
P.31
—
(EC)
E6 1Check if indoor/outdoor connecting wire is connected correctly. P.37
E7
—
2Check if noise entered into indoor/outdoor connecting wire or
power supply.
3Check if noise entered into indoor/outdoor controller board.
4Re-check error by turning off power, and on again.
P.37
P.37
(E8)
—
P.37
(E9)
E0 1Check if connecting wire of indoor unit or remote controller P.36
is connected correctly.
Remote controller transmitting error
is detected by remote controller.
E3 2Check if noise entered into transmission wire of remote
P.36
Remote controller signal receiving
error is detected by indoor unit.
E4
P.36
Remote controller transmitting error
is detected by indoor unit.
E5
4 blinking Check code is not defined.
controller.
3Re-check error by turning off power, and on again.
P.36
EF 1Check if remote controller is MA remote controller(PAR-21MAA).
P.37
PL 1Be sure to replace the 4-way valve.
P.38
Ed 1Check if connector (CN4) on outdoor controller board and
P.38
A0–A8
P.39 to
P.42
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.
2Check refrigerant pipes for disconnection or leakage.
3After the recovery of refrigerant, vacuum dry the whole
refrigerant circuit.
4Refer to “10-6.HOW TO CHECK THE PARTS”.
5Check refrigerant circuit for operation.
5 blinking Serial communication error
<Communication between outdoor
controller board and outdoor power
board>
<Communication between outdoor
controller board and M-NET P.C. board>
Communication error of M-NET
system
outdoor power board is not disconnected.
2Check if there is poor connection of connector on outdoor
controller board(CNMNT and CNVMNT).
3Check M-NET communication signal.
*1.Check code displayed on remote controller
OCH582B
Detailed
reference
page
65
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
Open/short
of comp. surface
5 blinking
thermistor (TH32)
4 blinking 1 blinking Abnormality of room temperature thermistor (TH1)
Abnormality of pipe temperature thermistor /Liquid (TH2)
Abnormality of pipe temperature
thermistor/Condenser-Evaporator
2 blinking Abnormality of drain sensor (DS)
Float switch(FS) connector open
P.32
P.32
U8 1Check the outdoor fan motor.
P.33
Ud
UF 1Check if stop valves are open.
P.35
P.35
UH
U6
U3 1Check if connectors(TH3, TH6 ,TH7 and TH32)on outdoor controller
P.35
P.35
P.33
P.32
2Check if connector (TH3) on outdoor controller board is disconnected.
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.
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
board and connector (CN3) on outdoor power board are not disconnected.
2Measure resistance value of outdoor thermistors.
P.33
U5 1Check if indoor/outdoor units have a short cycle on their air ducts.
P.33
U9 1Check looseness, disconnection, and converse connection of
P.34
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.
P1 1Check if connectors (CN20, CN21, CN29 and CN44) on indoor
controller board are not disconnected.
P2 2Measure resistance value of indoor thermistors.
P9
*2
*2
*2
P4 1Check if connector (CN31)(CN4F) on indoor controller board is not
*2
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.
3 blinking Freezing (cooling)/overheating P6 1Check if indoor unit has a short cycle on its air duct.
2Check if heat exchanger and filter is not dirty.
(heating) protection
3Measure resistance value on indoor and outdoor fan motors.
*2
4 blinking Abnormality of pipe
temperature
*2
4Check if the inside of refrigerant piping is not clogged.
P8 1Check if indoor thermistors(TH2 and TH5) are not disconnected from holder.
2Check if stop valve is open.
3Check converse connection of extension pipe. (on plural units connection)
4Check if indoor/outdoor connecting wire is connected correctly.
(on plural units connection)
*1 Check code displayed on remote controller
*2 Refer to the indoor unit’s service manual.
OCH582B
66
<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
OFF/FAN
C
COOLING/DRY *
H
HEATING
d
DEFROSTING
*C5 is displayed during replacement operation.
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
2
3
4
Display
F5
E8
E9
EA
Eb
EC
E0–E7
Inspection unit
Outdoor unit
Indoor unit 1
Indoor unit 2
Indoor unit 3
Indoor unit 4
Display
U1
U2
U3
U4
U5
U6
U8
Ud
UF
UH
UL
UP
PL
P1–P8
A0–A7
Contents to be inspected (During operation)
Abnormal high pressure (63H operated)
Abnormal 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
Communication error of M-NET system
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
OCH582B
67
The black square ( ) indicates a switch position.
Pipe temperature/Liquid (TH3)
−40 to 90
ON
Explanation for display
Display detail
SW2 setting
1 2 3 4 5 6
−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 2 s Unit
:
10
Comp. surface temperature (TH32)
−52 to 221
ON
1 2 3 4 5 6
ON
−52 to 221
(When the comp. surface 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 2 s
1
05
:
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 2 s
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 2 s
2
45
10 hours
Step
1 2 3 4 5 6
ON
1 2 3 4 5 6
Compressor integrating operation times
0 to 9999
ON
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 100 Hz or more, hundreds digit, tens
digit and ones digit are displayed by turns.
(Example) When 125 Hz;
0.5 s 0.5 s 2 s
1
25
A
1 2 3 4 5 6
ON
1 2 3 4 5 6
LEV-A opening pulse
0 to 480
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 2 s
1
50
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)
ON
1 2 3 4 5 6
1 2 3 4 5 6
OCH582B
68
Hz
Pulse
Code
display
Code
display
The black square ( ) indicates a switch position.
SW2 setting
ON
Display detail
Explanation for display
Unit
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 2 s
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 2 s
1
30
:
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
Compressor operating current on error
occurring
0 to 50
0 to 50
A
1 2 3 4 5 6
ON
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 2 s
2
45
Code
display
1 2 3 4 5 6
ON
Code
display
1 2 3 4 5 6
ON
1 2 3 4 5 6
OCH582B
Test run elapsed time
0 to 120
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 2 s
1
05
69
Minute
Minute
The black square ( ) indicates a switch position.
Explanation for display
Display detail
SW2 setting
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
ON
Code
40
50
P200YKA
P250YKA
1 2 3 4 5 6
Outdoor unit setting information
ON
• The tens digit (Total display for applied setting)
Setting details
Display details
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
Code
display
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
OCH582B
70
The black square ( ) indicates a switch position.
SW2 setting
ON
Explanation for display
Display detail
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
ON
1 2 3 4 5 6
ON
0 to 255
(When the temperature is 100°C or more, hundreds
digit, tens digit and ones digit are displayed by
turns.)
Discharge superheat SHd
0 to 255
Cooling = TH32−TH6
Heating = TH32−TH5
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 2 s
9
C4
Number of defrost cycles
0 to FFFE
1 2 3 4 5 6
ON
0 to 500
(When it is 100 or more, hundreds digit, tens digit
and ones digit are displayed by turns.)
Input current of outdoor unit
1 2 3 4 5 6
U9 error detail history (latest)
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
ON
OCH582B
71
2 cycles
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
°C
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
°C
Code
display
V
The black square ( ) indicates a switch position.
ON
1 2 3 4 5 6
Explanation for display
Display detail
SW2 setting
Capacity save
0 to 100
When air conditioner is connected to
M-NET and capacity save mode is
demanded, a value from “0” to “100” is
displayed.
0 to 100
(When the capacity is 100% hundreds digit, tens digit
and ones digit are displayed by turns.)
(Example) When 100%;
0.5 s 0.5 s 2 s
1
00
Unit
%
When there is no setting of
capacity save, “100” is displayed.
ON
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
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
Fan step on error occurring
0 to 10
ON
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 2 s 1
25
Code
display
Hz
0 to 10
Step
1 2 3 4 5 6
Indoor room temperature (TH1) on error
occurring
8 to 39
ON
Code
display
8 to 39
:
1 2 3 4 5 6
OCH582B
72
The black square ( ) indicates a switch position.
SW2 setting
ON
1 2 3 4 5 6
ON
Explanation for display
Display detail
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 2 s
15
−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 2 s
15
Indoor pipe temperature/Cond./Eva.
(TH5) on error occurring
−39 to 88
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
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 2 s
15
Outdoor temperature/Ambient (TH7) on
error occurring
−39 to 88
1 2 3 4 5 6
ON
1 2 3 4 5 6
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
1 2 3 4 5 6
Cooling = TH32−TH6
Heating = TH32−TH5
Sub cool on error occurring SC
0 to 130
ON
1 2 3 4 5 6
−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 2 s
15
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 2 s
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 2 s
Cooling = TH6−TH3
Heating = TH5−TH2
1
ON
1 2 3 4 5 6
4
OCH582B
73
:
:
:
:
:
:
:
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 2 s
Thermo-ON time until error stops
0 to 999
Unit
15
Minute
The black square ( ) indicates a switch position.
Unit
Explanation for display
Display detail
SW2 setting
Indoor pipe temperature/Liquid (TH2 (3)) −39 to 88
Indoor 3
(When the temperature is 0°C or less, “–” and
−39 to 88
temperature are displayed by turns.)
ON
:
1 2 3 4 5 6
ON
1 2 3 4 5 6
Indoor pipe temperature/Cond./Eva. (TH5 −39 to 88
(When the temperature is 0°C or less, “–” and
(3))
Indoor 3
temperature are displayed by turns.)
−39 to 88
When there is no indoor unit, “00” is displayed.
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
Time to current limit activates from com- 0 to 180
pressor turns ON.
0 to 180
ON
Seconds
1 2 3 4 5 6
Detailed code of check code U9
ON
1 2 3 4 5 6
OCH582B
Description
Normal
Overvoltage error
Undervoltage error
T open-phase
Abnormal power synchronous signal
Defective power board
Q1 current, overvoltage
74
Detected at Display
—
00
Power board
01
Power board
02
04
Controller board
08
Power board
Power board
10
Code
11
FUNCTION SETTING
11-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER
Each function can be set as necessary using the remote controller. The setting of function for each unit can only be done by
the remote controller. Select function available from the table 1.
<Table 1> Function selections
(1) Functions available when setting the unit number to 00 (Select 00 referring to 4 setting the indoor unit number.)
Function
Mode No. Setting No.
Settings
Power failure
automatic recovery
Indoor temperature
detecting
OFF
ON
Average data from each indoor unit
Data from the indoor unit with remote controller
Data from main remote controller*
LOSSNAY
Not supported
connectivity
Supported (Indoor unit does not intake outdoor air through LOSSNAY)
Supported (Indoor unit intakes outdoor air through LOSSNAY)
Power supply
240V
voltage
220V, 230V
Auto operation mode Single set point
Dual set point
Frost prevention
2: (Normal)
temperature
3:
Humidifier control
When the compressor operates, the humidifier also operates.
When the fan operates, the humidifier also operates.
Change of
Standard
defrosting control
For high humidity
Refrigerant leakage 80%
setting (%)
60%
01
02
03
04
06
15
16
17
21
: Initial setting
(when sent from the factory)
1
2
1
2
3
1
2
3
1
2
1
2
1
2
1
2
1
2
1
2
Remarks
The setting is
applied to all
the units in the
same
refrigerant
system.
*The function is available only when the wired remote controller is used. The function is not available for floor standing models.
Meaning of "Function setting"
mode02:indoor temperature detecting
OUTDOOR
OUTDOOR
No Indoor temperature(ta)=
INDOOR
REMOTE
(MAIN)
No.1 Average data of the
sensor on all the
indoor units
Initial ta=(A+B)/2
setting
INDOOR
INDOOR
REMOTE
(MAIN)
REMOTE
(SUB)
INDOOR
REMOTE
(SUB)
OUTDOOR
OUTDOOR
INDOOR
INDOOR
REMOTE
(MAIN)
REMOTE
(SUB)
REMOTE
(MAIN)
ta=(A+B)/2
ta=A
ta=A
No.2 The data of the sensor
on the indoor unit that
connected
with remote controller
ta=A
ta=B
ta=A
ta=A
No.3 The data of the sensor
on main remote
controller
ta=C
ta=C
ta=C
ta=C
OCH582B
75
(2) Functions available when setting the unit number to 01–03 or AL (07 in case of wireless remote controller)
• When setting functions for an indoor unit in an independent system, set the unit number to 01 referring to 4 setting the
indoor unit number of Operating Procedure.
• When setting functions for a simultaneous- Twin Triple indoor unit system, set the unit number to 01 to 03 for each indoor
unit in case of selecting different functions for each unit referring to 4 setting the indoor unit number of Operating Procedure.
• When setting the same functions for an entire simultaneous Twin Triple-indoor unit system, set refrigerant address to AL (07
in case of wireless remote controller) referring to 4 setting the indoor unit number of Operating Procedure.
Function
: Initial setting (Factory setting)
- : Not available
Ceiling
Ceiling
Floor
Mode Setting 4-Way
Wall mounted
standing concealed
No. No. cassette suspended
Settings
PLA-BA
Filter sign
Air flow
(Fan speed)
No.of air outlets
Optional high efficiency
filter
Vane setting
Optional humidifier
(PLA only)
Vane differential setting
in heating mode
(cold wind prevention)
Swing
Set temperature in heating
mode (4 deg up) *
Fan speed during the
heating thermo OFF
Fan speed during the
cooling thermo OFF
Detection of abnormality of
the pipe temperature (P8)
100h
2500h
No filter sign indicator
Quiet
Standard
High ceiling
4 directions
3 directions
2 directions
Not supported
Supported
No vanes (Vane No.3 setting : PLA only)
Vane No.1 setting
Vane No.2 setting
Not supported
Supported
No.1 setting (TH5: 24–28°C)
No.2 setting (Standard, TH5:28–32°C)
No.3 setting (TH5: 32–38°C)
Not available Swing
PLA-BA
Available
Wave air flow
Available
Not available
Extra low
Stop
Set fan speed
Set fan speed
Stop
Available
Not available
}
07
08
09
10
11
13
14
23
24
25
27
28
PCA-KAQ PKA-HAL PKA-KAL PSA-KA PEA-GA
1
2
3
1
2
3
1
2
3
1
2
1
2
3
1
2
1
2
3
1
2
1
2
1
2
3
1
2
1
2
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
* PKA-HAL/KAL: 2 deg up
PEAD-RP•JA(L)Q
Function
Settings
Filter sign
External static pressure
External static pressure
Set temperature in heating
mode (4 deg up)
Fan speed during the
heating thermo OFF
Fan speed during the
cooling thermo OFF
Detection of abnormality
of the pipe
Mode No.11
Setting No.
100h
2500h
No filter sign indicator
35/50/70/100/150Pa
35/50/70/100/150Pa
Available
Not available
Extra low
Stop
Set fan speed
Set fan speed
Stop
Available
Not available
Settings
Mode Setting
No. No.
07
08
10
24
25
27
28
: Initial setting
(Factory setting)
1
2
3
Refer to the right table
Refer to the right table
1
2
1
2
3
1
2
1
2
Setting No.
Initial setting
External static
pressure
Mode No. 08 Mode No. 10 (Factory setting)
35Pa
1
2
50Pa
1
3
70Pa
2
1
100Pa
2
2
150Pa
2
3
PLA-BA
PCA-KAQ
1
Vane No.3 setting
No Vanes
Less smudging
( Downward position than the standard )
No vane function
2
Vane No.1 setting
Standard
Standard
3
Vane No.2 setting
Less draft * (Upward position than the standard) Less draft * (Upward position than the standard)
* Be careful of the smudge on ceiling.
OCH582B
76
11-1-1. Selecting functions using the wired remote controller <PAR-30MAA> <PAR-31MAA>
<Service menu>
Maintenance password is required
1 Select "Service" from the Main menu, and press the
button.
At the main display, the menu button and select "Service" to make the
maintenance setting.
Main
Main menu
Maintenance
Initial setting
Service
Main display:
Cursor
2 When the Service menu is selected, a window will appear asking for the pass-
F1
F2
F3
Service menu
word.
To enter the current maintenance password (4 numerical digits), move the
cursor to the digit you want to change with the F1 or F2 button.
Page
F4
Enter maintenance password
Select:
Cursor
Set each number (0 through 9) with the F3 or F4 button.
F1
Then, press the
F2
F3
button.
Note:The initial maintenance password is "9999". Change the default
password as necessary to prevent unauthorized access. Have the
password available for those who need it.
:If you forget your maintenance password, you can initialize the
password to the default password "9999" by pressing and holding
the F1 and F2 buttons simultaneously for three seconds on the
maintenance password setting screen.
3 If the password matches, the Service menu will appear.
Service menu
The type of menu that appears depends on the connected indoor units’ type.
Test run
Input maintenance info.
Function setting
Check
Self check
Main menu:
Cursor
Note:Air conditioning units may need to be stopped to make certain settings. There may be some settings that cannot be made when the
system is centrally controlled.
Service menu
Maintenance password
Remote controller check
Main menu:
Cursor
A screen will appear that indicates the setting has been saved.
Service menu
Not available.
Please stop the unit.
OCH582B
Navigating through the screens
• To go back to the Main menu ...................
button
• To return to the previous screen................
button
77
Service menu:
F4
<Function setting>
1 Select "Service" from the Main menu, and press the
Service menu
button.
Select "Function setting" with the F1 or F2 button, and press the
Test run
Input maintenance info.
Function setting
Check
Self check
button.
Main menu:
Cursor
F1
2 Set the indoor unit refrigerant addresses and unit numbers with the F1
through F4 buttons, and then press the
setting.
button to confirm the current
F2
Monitor:
refrigerant address will start fan operation.
F1
the system appears highlighted.
Non-highlighted items indicate that no function settings are made.
Screen appearance varies depending on the "Unit No." setting.
Cursor
F2
and change the setting number with the F3 or F4 button.
data from the remote controller to the indoor units.
When the transmission is successfully completed, the screen will return to the
Function setting screen.
Note:• Make the above settings only on Mr. Slim units as necessary.
• The above function settings are not available for the City Multi units.
• Table 1 summarizes the setting options for each mode number. Refer to
the indoor unit Installation Manual for the detailed information about initial settings, mode numbers, and setting numbers for the indoor units.
• Be sure to write down the settings for all functions if any of the initial
settings has been changed after the completion of installation work.
OCH582B
78
F4
Cursor
F2 setting
F3
F4
Function
Grp.
Ref. address
Mode 1
Mode 2
Mode 3
Mode 4
Request:
F1
button to send the setting
F3
F1
Cursor
5 When the settings are completed, press the
Address
Function setting
Grp.
Ref. address
Mode 1
Mode 2
Mode 3
Mode 4
Request:
Cursor
4 Use the F1 or F2 button to move the cursor to select the mode number,
F4
Function setting
Ref. address
Unit No.
Grp./1/2/3/4/All
<Checking the indoor unit No.>
When the
button is pressed, the target indoor unit will start fan operation.
If the unit is common or when running all units, all indoor units for the selected
3 When data collection from the indoor units is completed, the current setting of F3
F2
Cursor
F3
F4
Function setting
Ref. address
Sending data
F1
F2
F3
F4
11-1-2. Selecting functions using the wireless remote controller (Type C)
Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refrigerant system with wireless function. Refrigerant address cannot be specified by the wireless remote controller.
[Flow of function selection procedure]
CHECK
Flow of function selection procedure
The flow of the function selection procedure is shown below. This example shows how to turn off
the function that raises the set temperature by 4 degrees during HEAT operation. (Mode 24: 2)
The procedure is given after the flow chart.
1 Check the function selection setting.
TEMP
ON/OFF
MODE
FAN
AUTO STOP
VANE
AUTO START
CHECK LOUVER
h
min
TEST RUN
SET
2 Switch to function selection mode.
(Enter address "50"
in check mode,
h
then press the
button.)
RESET
Check mode is the mode entered when
you press the CHECK button twice to display
"CHECK".
3 Specify unit No. "01" (since the function applies to unit 01).
(Set address "01" while still in check mode, then press the
Note: You cannot specify the refrigerant address.
min
6
4 Select mode No. "24" (function that raises set temperature byh 4 degrees during HEAT operation).
(Set address "24" while still in check mode, then press the
button.)
5 Select setting No. "02" (OFF).
(Set address "02" while still in check mode, then press the
h
7
button.)
NO
YES
Change
unit No.
button.)
CLOCK
Finished
NO
YES
8 End function selection mode. Note: When you switch to function selection mode
on the wireless remote controller's operation
(End check mode.)
area, the unit ends function selection mode
automatically if nothing is input for 10 minutes
or longer.
[Operating instructions]
1 Check the function settings.
CHECK
2 Press the button twice continuously. → CHECK is lit and “00” blinks.
Press the TEMP button once to set “50”. Direct the wireless remote controller toward the receiver of the indoor unit and press
h
the button.
3 Set the unit number.
Press the TEMP button to set the unit number. (Press “01” to specify the indoor unitminwhose unit number is 01.)
Direct the wireless remote controller toward the receiver of the indoor unit and press the button.
min
By setting unit number with the button, specified indoor unit starts performing fan operation.
Detect which unit is assigned to which number using this function. If unit number is set to AL, all the indoor units in same
refrigerant system start performing fan operation simultaneously.
Notes:
1. If a unit number that cannot be recognized by the unit is entered, 3 beeps of 0.4 seconds will be heard. Reenter the unit number setting.
2. If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the unit number setting.
4 Select a mode.
Press the TEMP button to set a mode. Press “24” to turn on the function that raises the set temperature by 4 degrees h
during heat operation. Direct the wireless remote controller toward the sensor of the indoor unit and press the button.
→ The sensor-operation indicator will flash and beeps will be heard to indicate the current setting number.
Current setting number: 1 = 1 beep (1 second)
2 = 2 beeps (1 second each)
3 = 3 beeps (1 second each)
Notes:
1. If a mode number that cannot be recognized by the unit is entered, 3 beeps of 0.4 seconds will be heard. Reenter the mode number.
2. If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the mode number.
5 Select the setting number.
Press the TEMP button to select the setting number. (02: Not available)
h
Direct the wireless remote controller toward the receiver of the indoor unit and press the button.
→ The sensor-operation indicator will flash and beeps will be heard to indicate the the setting number.
Setting number: 1 = 2 beeps (0.4 seconds each)
2 = 2 beeps (0.4 seconds each, repeated twice)
3 = 2 beeps (0.4 seconds each, repeated 3 times)
Notes:
1. If a setting number that cannot be recognized by the unit is entered, the setting will turn back to the original setting.
2. If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the setting number.
6 Repeat steps 4 and 5 to make an additional setting without changing unit number.
7 Repeat steps 3 to 5 to change unit number and make function settings on it.
8 Complete the function settings
Press
button.
Do not use the wireless remote controller for 30 seconds after completing the function setting.
OCH582B
79
11-2. FUNCTION SELECTION OF REMOTE CONTROLLER
11-2-1. PAR-30MAA/PAR-31MAA
The functions of the function buttons change depending on
the screen. Refer to the button function guide that appears
at the bottom of the LCD for the functions they serve on a
given screen.
When the system is centrally controlled, the button function
guide that corresponds to the locked button will not appear.
<Main display>
<Main menu>
Fri
Room
Cool
Set temp.
Auto
Mode
Temp.
Fan
Function buttons
F1
F2
F3
Main menu
Vane·Louver·Vent. (Lossnay)
High power
Timer
Weekly timer
OU silent mode
Main display:
Cursor
Page
Function guide
F4
ON/OFF lamp
ON/OFF button
This lamp lights up in green while the unit is in operation.
It blinks while the remote controller is starting up or when
there is an error.
Press to turn ON/OFF the indoor unit.
SELECT button
Press to save the setting.
Function button F1
Main display : Press to change the operation mode.
Main menu : Press to move the cursor down.
RETURN button
Press to return to the previous screen.
Function button F2
MENU button
Main display : Press to decrease temperature.
Main menu : Press to move the cursor up.
Press to bring up the Main menu.
Backlit LCD
Function button F3
Operation settings will appear.
When the backlight is off, pressing any button turns the
backlight on and it will stay lit for a certain period of time
depending on the screen.
Main display : Press to increase temperature.
Main menu : Press to go to the previous page.
Function button F4
Main display : Press to change the fan speed.
Main menu : Press to go to the next page.
When the backlight is off, pressing any button turns
the backlight on and does not perform its function.
(except for the
(ON/OFF) button)
OCH582B
Main
80
Menu structure <PAR-30MAA><PAR-31MAA>
Main menu
Press the MENU button.
Move the cursor to the desired item with the
F1
and
F2
buttons, and press the SELECT button.
Vane · Louver · Vent. (Lossnay)
High power
Timer
ON/OFF timer
Auto-Off timer
Weekly timer
Restriction
Temp. range
Operation lock
Energy saving
Auto return
Schedule
Night setback
Filter Information
Error Information
Maintenance
Auto descending panel
Manual vane angle
Initial setting
Main/Sub
Clock
Main display
Contrast
Display details
Auto mode
Administrator password
Language selection
Service
Test run
Input maintenance info.
Function setting
Lossnay (City Multi only)
Check
Self check
Maintenance password
Remote controller check
Not all functions are available on all models of indoor units.
OCH582B
81
Main menu list <PAR-30MAA><PAR-31MAA>
Main menu list
Setting and display items
Setting details
Vane · Louver · Vent. (Lossnay)
Use to set the vane angle.
• Select a desired vane setting from five different settings.
Use to turn ON/OFF the louver.
• Select a desired setting from "ON" and "OFF."
Use to set the amount of ventilation.
• Select a desired setting from "Off," "Low," and "High."
High power
Use to reach the comfortable room temperature quickly.
• Units can be operated in the High-power mode for up to 30 minutes.
Timer
ON/OFF timer*
Use to set the operation ON/OFF times.
• Time can be set in 5-minute increments.
Auto-Off timer
Use to set the Auto-Off time.
• Time can be set to a value from 30 to 240 in 10-minute increments.
Weekly timer*
Restriction
Energy saving
Use to set the weekly operation ON/OFF times.
• Up to 8 operation patterns can be set for each day.
(Not valid when the ON/OFF timer is enabled.)
Temp. range
Use to restrict the preset temperature range.
• Different temperature ranges can be set for different operation modes.
Operation lock
Use to lock selected functions.
• The locked functions cannot be operated.
Auto return
Use to get the units to operate at the preset temperature after performing energy-save operation for a
specified time period.
• Time can be set to a value from 30 and 120 in 10-minute increments.
(This function will not be valid when the preset temperature ranges are restricted.)
Schedule*
Set the start/stop times to operate the units in the energy-save mode for each day of the week, and set the
energy-saving rate.
• Up to 4 energy-save operation patterns can be set for each day.
• Time can be set in 5-minute increments.
• Energy-saving rate can be set to a value from 0% or 50 to 90% in 10% increments.
Night setback*
Use to make Night setback settings.
• Select "Yes" to enable the setting, and "No" to disable the setting. The temperature range and the start/stop times can be set.
Filter information
Use to check the filter status.
• The filter sign can be reset.
Error information
Use to check error information when an error occurs.
• Check code, error source, refrigerant address, unit model, manufacturing number, contact information (dealer's
phone number) can be displayed.
(The unit model, manufacturing number, and contact information need to be registered in advance to be displayed.)
Maintenance
Initial setting
Service
Auto descending panel Auto descending panel (Optional parts) Up/Down you can do.
Manual vane angle
Use to set the vane angle for each vane to a fixed position.
Main/Sub
When connecting two remote controllers, one of them needs to be designated as a sub controller.
Clock
Use to set the current time.
Main display
Use to switch between "Full" and "Basic" modes for the Main display.
• The initial setting is "Full."
Contrast
Use to adjust screen contrast.
Display details
Make the settings for the remote controller related items as necessary.
Clock: The initial settings are "Yes" and "24h" format.
Temperature: Set either Celsius (°C) or Fahrenheit (°F).
Room temp. : Set Show or Hide.
Auto mode: Set the Auto mode display or Only Auto display.
Auto mode
Whether or not to use the Auto mode can be selected by using the button.
This setting is valid only when indoor units with the Auto mode function are connected.
Administrator password
The administrator password is required to make the settings for the following items.
• Timer setting • Energy-save setting • Weekly timer setting
• Restriction setting • Outdoor unit silent mode setting • Night set back
Language selection
Use to select the desired language.
Test run
Select "Test run" from the Service menu to bring up the Test run menu.
• Test run • Drain pump test run
Input maintenance
Select "Input maintenance Info." from the Service menu to bring up the Maintenance information screen.
The following settings can be made from the Maintenance Information screen.
• Model name input • Serial No. input • Dealer information input
Function setting
Make the settings for the indoor unit functions via the remote controller as necessary.
Check
Error history: Display the error history and execute “delete error history”.
Refrigerant leak check: Refrigerant leaks can be judged.
Smooth maintenance: The indoor and outdoor maintenance data can be displayed.
Request code: Details of the operation data including each thermistor temperature and error history can be checked.
Self check
Error history of each unit can be checked via the remote controller.
Maintenance password Use to change the maintenance password.
Remote controller check When the remote controller does not work properly, use the remote controller checking function to troubleshoot the problem.
* Clock setting is required.
OCH582B
82
12
MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER
12-1. HOW TO "MONITOR THE OPERATION DATA"
12-1-1. PAR-30MAA/PAR-31MAA
Details on the operation data including each thermistor temperature and error history can be confirmed with the remote controller.
1 Select "Service" from the Main menu, and press the
button.
Select "Check" with the F1 or F2 button, and press the
Check menu
Error history
Refrigerant volume check
Refrigerant leak check
Smooth maintenance
Request code
Service menu:
button.
Cursor
Select "Request code" with the F1 or F2 button, and press the
button.
F1
2 Set the Refrigerant address and Request code.
F2
F3
F4
Request code
Ref.address
Request code
Select the item to be changed with the F1 or F2 button.
Select the required setting with the F3 or F4 button.
Request:
Cursor
■<Ref.address>setting [ 0 ] – [ 15 ]
−
+
■<Request code>setting
F1
Press the
F2
F3
F4
button, Data will be collected and displayed.
Request code
Ref.address
Request code
Request code: 004
Discharge temperature: 69˚C
Request:
Cursor
OCH582B
83
−
+
12-2. Request code list
Request code
Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed.
Description
Request content
(Display range)
Unit
0
Operation state
Refer to 12-2-1. Detail Contents in Request Code.
–
1
Compressor-Operating current (rms)
0–50
A
2
Compressor-Accumulated operating time
0–9999
10 hours
3
Compressor-Number of operation times
0–9999
100 times
4
Comp. surface temperature (TH32)
3–217
:
5
Outdoor unit -Liquid pipe 1 temperature (TH3)
−40–90
:
Outdoor unit-2-phase pipe temperature (TH6)
−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
0–9999
rpm
0–9999
rpm
LEV (A) opening
0–500
Pulses
25
Primary current
0–50
A
26
DC bus voltage
180–370
V
29
Number of connected indoor units
0–4
30
Indoor unit-Setting temperature
17–30
31
Indoor unit-Intake air temperature <Measured by thermostat> 8–39
Remarks
6
7
8
11
14
15
19
20
Outdoor unit-Fan 1 speed
(Only for air conditioners with DC fan motor)
Outdoor unit-Fan 2 speed
(Only for air conditioners with DC fan motor)
"0" is displayed if the air conditioner is a single-fan
type.
21
22
23
24
27
28
32
33
34
35
Indoor unit-Intake air temperature (Unit No. 1)
Units
:
:
8–39
:
<Heat mode-4-deg correction>
Indoor unit-Intake air temperature (Unit No. 2)
8–39
:
<Heat mode-4-deg correction>
Indoor unit-Intake air temperature (Unit No. 3)
8–39
:
<Heat mode-4-deg correction>
Indoor unit-Intake air temperature (Unit No. 4)
"0" is displayed if the target unit is not present.
8–39
:
<Heat mode-4-deg correction>
36
37
Indoor unit -Liquid pipe temperature (Unit No. 1)
−39–88
:
38
Indoor unit -Liquid pipe temperature (Unit No. 2)
:
39
Indoor unit -Liquid pipe temperature (Unit No. 3)
−39–88
−39–88
40
Indoor unit -Liquid pipe temperature (Unit No. 4)
−39–88
:
42
Indoor unit-Cond./Eva. pipe temperature (Unit No. 1)
−39–88
:
43
Indoor unit-Cond./Eva. pipe temperature (Unit No. 2)
−39–88
:
44
Indoor unit-Cond./Eva. pipe temperature (Unit No. 3)
−39–88
:
45
Indoor unit-Cond./Eva. pipe temperature (Unit No. 4)
−39–88
:
48
Thermostat ON operating time
0–999
Minutes
49
Test run elapsed time
0–120
Minutes
"0" is displayed if the target unit is not present.
:
41
"0" is displayed if the target unit is not present.
46
47
OCH582B
84
Not possible to activate maintenance mode during the test run.
Request code
Description
Request content
(Display range)
Unit
50
Indoor unit-Control state
Refer to 12-2-1.Detail Contents in Request Code.
–
51
Outdoor unit-Control state
Refer to 12-2-1.Detail Contents in Request Code.
–
52
Compressor-Frequency control state
Refer to 12-2-1.Detail Contents in Request Code.
–
53
Outdoor unit-Fan control state
Refer to 12-2-1.Detail Contents in Request Code.
–
54
Actuator output state
Refer to 12-2-1.Detail Contents in Request Code.
–
55
Error content (U9)
Refer to 12-2-1.Detail Contents in Request Code.
–
56
57
58
59
60
Signal transmission demand capacity
0–255
%
61
Contact demand capacity
Refer to 12-2-1.Detail Contents in Request Code.
–
62
External input state (silent mode, etc.)
Refer to 12-2-1.Detail Contents in Request Code.
–
63
64
65
66
67
68
69
70
Outdoor unit-Capacity setting display
Refer to 12-2-1.Detail Contents in Request Code.
–
71
Outdoor unit-Setting information
Refer to 12-2-1.Detail Contents in Request Code.
–
M-NET adapter connection (presence/absence)
"0000": Not connected
"0001": Connected
–
89
Display of execution of replace/wash operation
"0000": Not washed
"0001": Washed
–
90
Outdoor unit-Microprocessor version information
Examples) Ver 5.01 → "0501"
Ver
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
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)
OCH582B
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)
85
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
Remarks
3 : TH3
106
Abnormal thermistor display
(TH3/TH6/TH7/TH8)
6 : TH6
7 : TH7
Sensor
8 : TH8
number
0 : No thermistor error
107 Operation mode at time of error
Displayed in the same way as request code "0".
–
108 Compressor-Operating current at time of error
0–50
A
109 Compressor-Accumulated operating time at time of error 0–9999
10 hours
110 Compressor-Number of operation times at time of error 0–9999
3–217
111 Comp. surface temperature (TH32) at time of error
100 times
:
−40–90
:
−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
:
112 Outdoor unit -Liquid pipe 1 temperature (TH3) at time of error
113
114 Outdoor unit-2-phase pipe temperature (TH6) at time of error
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
"0" is displayed if the air conditioner is a singlefan type.
124
0–500
Pulses
0–999
Minutes
132 Indoor -Liquid pipe temperature at time of error
−39–88
:
133 Indoor -Cond/Eva. pipe temperature at time of error
−39–88
:
−39–88
:
150 Indoor -Actual intake air temperature
−39–88
:
151 Indoor -Liquid pipe temperature
−39–88
:
152 Indoor -Cond/Eva. pipe temperature
−39–88
:
125 LEV (A) opening at time of error
126
127
128
129
130 Thermostat ON time until operation stops due to error
131
134
Indoor at time of error
• Intake air temperature <Thermostat judge temperature>
135
136
137
138
139
140
~
146
147
148
149
OCH582B
86
Average value of all indoor units is displayed if the air conditioner consists of 2 or more indoor units (twin, triple, quad).
Average value of all indoor units is displayed if the air conditioner consists of 2 or more indoor units (twin, triple, quad).
Request code
Description
Request content
(Display range)
Unit
Remarks
153
154
155
Indoor-Fan operating time
(After filter is reset)
Indoor-Total operating time
(Fan motor ON time)
0–9999
1 hour
0–9999
10 hours
156
0–255
Fan control data
–
For indoor fan phase control
"00 **" "**" indicates fan control data.
–
For indoor fan pulsation control
"00 **" "**" indicates fan control data.
–
For indoor DC brushless motor control
162 Indoor unit-Model setting information
Refer to 12-2-1. Detail Contents in Request Code.
–
163 Indoor unit-Capacity setting information
Refer to 12-2-1. Detail Contents in Request Code.
–
164 Indoor unit-SW3 information
Undefined
–
165 Wireless pair No. (indoor control board side) setting
Refer to 12-2-1. Detail Contents in Request Code.
–
166 Indoor unit-SW5 information
Undefined
–
Examples) Ver 5.01 → "0501"
Ver
157 Indoor fan output value (Sj value)
158
Indoor fan output value
(Pulsation ON/OFF)
159 Indoor fan output value (duty value)
160
161
167
~
189
190 Indoor unit-Microprocessor version information
191 Indoor unit-Microprocessor version information (sub No.) Auxiliary information (displayed after version information)
Examples) Ver 5.01 A000 → "A000"
–
192
~
764
765 Stable operation (Heat mode)
This request code is not provided to collect data. It is used to fix the operation state.
766 Stable operation (Cool mode)
This request code is not provided to collect data. It is used to fix the operation state.
767 Stable operation cancellation
OCH582B
This request code is not provided to collect data. It is used to cancel the operation state that has been
fixed by request codes "765" and "766".
87
12-2-1. Detail Contents in Request Code
[Operation state] (Request code :" 0")
Relay output state
Data display
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
Four-way valve
Solenoid valve
–
–
–
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
[Indoor unit – Control state] (Request code :" 50 ")
Data display
Unit No. 4 state
Unit No. 3 state
Unit No. 2 state
Unit No. 1 state
Display
0
1
2
3
4
5
6
7
F
State
Normal
Preparing for heat operation
–
–
Heater is ON.
Anti-freeze protection is ON.
Overheat protection is ON.
Requesting compressor to turn OFF
There are no corresponding units.
[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
0
Display
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.
OCH582B
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
88
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
[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
Four-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
Display
Overvoltage
error
: Detected
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
OCH582B
Error content 2
Display
0
1
2
3
89
Converter Fo
error
SS
ON
ON
ON
ON
ON
ON
ON
ON
ON
Display
: Detected
PAM error
ON
ON
ON
ON
[Contact demand capacity] (Request code : " 61")
Data display
0
0
0
Setting content
Setting content
Display
Setting value
0
1
2
3
0%
50%
75%
100%
[External input state] (Request code : "62")
Data display
0
0
0
Input state
Input state
Display
Contact demand
input
Silent mode
input
0
1
2
3
4
5
6
7
8
9
A
b
C
d
E
F
[Outdoor unit -–Capacity setting display] (Request code : "70")
Data display
9
10
11
14
20
25
28
40
50
Capacity
35
50
60
71
100
125
140
200
250
[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
OCH582B
90
Heat pump/
cooling only
Heat pump
Cooling only
Heat pump
Cooling only
Spare 1
input
: Input present
Spare 2
input
[Indoor unit – Model setting information] (Request code : "162" )
Data display
0
Display
0
See the table on the right.
00
01
02
03
04
05
06
07
08
09
0A
0b
0C
0d
0E
0F
10
11
12
13
14
15
16
17
18
19
1A
1b
1C
1d
1E
1F
Model setting state
Display
Display
Model setting state
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
AA
Ab
AC
Ad
AE
AF
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
BA
BB
BC
BD
BE
BF
20
21
22
23
24
25
26
27
28
29
2A
2b
2C
2d
2E
2F
30
31
32
33
34
35
36
37
38
39
3A
3b
3C
3d
3E
3F
PEA-RP200/250GAQ
Model setting state
PLA-RP•BA
PSA-RP•KA
PCA-RP•KAQ
PKA-RP•HAL/KAL
PEAD-RP•JA(L)Q
[Indoor unit – Capacity setting information] (Request code : "163")
Data display
0
0
See the table on the right.
Display
Capacity setting state
Display
Capacity setting state
00
01
02
03
04
05
06
07
08
09
0A
0b
0C
0d
0E
0F
12
16
22
25
28
32
35, 36
40
45
50
56
63
71
80
90
100
10
11
12
13
14
15
16
17
18
19
1A
1b
1C
1d
1E
1F
112
125
140
160
200
224
250
280
[Wireless pair No. (indoor control board side) setting] (Request code :" 165")
Data display
0
Display
0
See the table on the right.
OCH582B
00
01
02
03
91
Pair No. setting state
No.
No.
No.
No.
0
1 J41 disconnected
2 J42 disconnected
3 J41, J42 disconnected
13
EASY MAINTENANCE FUNCTION
13-1. Smooth maintenance
13-1-1. PAR-30MAA/PAR-31MAA
Maintenance data, such as the indoor/outdoor unit’s heat exchanger temperature and compressor operation current can be
displayed with “Smooth maintenance”.
This cannot be executed during test operation.
Depending on the combination with the outdoor unit, this may not be supported by some models.
● Reduces maintenance work drastically.
● Enables you to check operation data of the indoor and outdoor units by remote controller.
Furthermore, use of maintenance stable-operation control that fixes the operating frequency, allows smooth inspection, even for
inverter models.
Smooth Maintenance Function
● Conventional inspection work
Discharge temperature 60°C
Smooth maintenance
Ref.address
Sub cool
OU TH4 temp.
OU TH6 temp.
OU TH7 temp.
●Outdoor unit ●
Cool
Remove the
service panel.
●Indoor unit ●
Measure
the intake air
temperature.
Return:
Page
Easy maintenance information (unit)
1
2
3
Compressor
Accumulated operating
time (o10 hours)
Outdoor unit
4
Number of ON/OFF
5
times (o10 times)
Operating
6
current (A)
Heat exchanger
temperature (:)
Discharge
temperature (:)
Outside air
temperature (:)
Indoor unit
7
8
9
Measure the discharge
temperature.
Intake air
temperature (:)
Heat exchanger
temperature (:)
Filter operating
time* (Hours)
Measure the outside
air temperature.
* The filter operating time is the time that has elapsed since the filter was reset.
Select "Service" from the Main menu, and press the
button.
Select "Check" with the F1 or F2 button, and press the
1
button.
Check menu
Error history
Refrigerant volume check
Refrigerant leak check
Smooth maintenance
Request code
Service menu:
Cursor
Select "Smooth maintenance" with the F1 or F2 button, and press the
button.
Set each item.
F1
F2
2
F4
Smooth maintenance
Ref.address
Stable mode
Select the item to be changed with the F1 or F2 button.
F3
Cool / Heat/ Normal
Select the required setting with the F3 or F4 button.
Begin:
Cursor
■<Ref.address>setting [ 0 ]−[ 15 ]
■<Stable mode>setting [ Cool ] / [ Heat ] / [ Normal ]
Press the
−Address+
Smooth maintenance
button, Fixed operation will start.
Ref.address
Stable mode
Stable mode will take approx. 20 minutes.
Cool / Heat/ Normal
Stabilization→Collecting
Exit:
OCH582B
92
Continue to the next page
The operation data will appear.
3
The Compressor-Accumulated operating (COMP. run) time is 10-hour unit,
and the Compressor-Number of operation times (COMP. ON/OFF) is a 100time unit (fractions discarded).
Smooth maintenance
Cool
Ref. address
COMP. current
COMP. run time
COMP. On / Off
COMP. frequency
Return:
A
Hr
times
Hz
Page
Smooth maintenance
Ref.address
Sub cool
OU TH4 temp.
OU TH6 temp.
OU TH7 temp.
Cool
Return:
Page
Navigating through the screens
• To go back to the Main menu ..........
• To return to the previous screen .......
Smooth maintenance
button
Ref.address
IU air temp.
IU HEX temp.
IU filter time
button
Cool
Return:
Page
■ Refrigerant address
Single refrigerant system
In the case of single refrigerant system, the refrigerant address
is "00" and no operation is required.
Simultaneous twin, triple units belong to this category
(single refrigerant system).
[1:1]
Refrigerant
address=00
[Twin]
Refrigerant
address=00
Outdoor
unit
Outdoor
unit
Indoor unit
01
Indoor unit
01
Remote
controller
Remote
controller
OCH582B
Indoor unit
02
Multi refrigerant system (group control)
Up to 16 refrigerant systems (16 outdoor units) can be connected as a group by 1 remote controller. To check or set the
refrigerant addresses.
Refrigerant
address
00
Outdoor
unit
Refrigerant
address
01
Outdoor
unit
Refrigerant
address
02
Outdoor
unit
Refrigerant
address
15
Outdoor
unit
Indoor unit
01
Indoor unit
01
Indoor unit
01
Indoor unit
01
Remote
controller
93
Hr
<Guide for operation condition>
Retightened
Outdoor Unit
Good
Retightened
Indoor Unit
Good
Retightened
V
1 Accumulated operating time
Time
2 Number of ON/OFF times
Times
3 Current
A
4 Refrigerant/heat exchanger temperature
COOL
: HEAT
Classification
Item
:
5 Refrigerant/discharge temperature
COOL
: HEAT
:
Inspection
Is "D000" displayed stably on the remote
6 Air/outside air temperature
COOL
: HEAT
:
(Air/discharge temperature)
COOL
: HEAT
:
Appearance
Good
Cleaning required
Heat exchanger
Good
Cleaning required
Sound/vibration
None
7 Air/intake air temperature
Present
:
COOL
: HEAT
:
8 Refrigerant/heat exchanger temperature COOL
: HEAT
:
Good
Cleaning required
Filter
Good
Cleaning required
Fan
Good
Cleaning required
Heat exchanger
Good
Cleaning required
Sound/vibration
None
Present
* The filter operating time is the time that has elapsed since the filter was reset.
difference
Inspection
Is "D000" displayed stably on the remote
difference
Notes:
1. Fixed Hz operation may not be possible under the following temperature ranges.
A)In cool mode, outdoor intake air temperature is 40 : or higher or
indoor intake air temperature is 23 : or lower.
B)In heat mode, outdoor intake air temperature is 20 : or higher or
indoor intake air temperature is 25 : or lower.
2. If the air conditioner is operated at a temperature range other than the
ones above but operation is not stabilized after 30 minutes or more have
elapsed, carry out inspection.
3. In heat mode, the operation state may vary due tofrost forming on the
outdoor heat exchanger.
(7 Indoor intake air temperature)— (8Indoor
heat exchanger temperature)
Heat mode
:
Filter may be clogged.*
Inspection A
Performance has dropped. Detailed in-
Heat
spection is necessary.
Inspection B
Refrigerant amount is dropping.
Inspection C
Filter or indoor heat exchanger may be
40
Inspection C
35
30
25
Filter inspection
20
Normal
15
10
Inspection B
Inspection A
5
0 10
20 30 40 50 60 70 80
:
[5 Discharge temperature] – [4 Outdoor
heat exchanger temperature)
clogged.
Note: The above judgement is just guide based on Japanese standard
conditions.
It may be changed depending on the indoor and outdoor
temperature.
* It may be judged as "Filter inspection" due to the outdoor and indoor
temperature, even though it is not clogged.
OCH582B
45
94
(8 Indoor heat exchanger temperature) —
(7 Indoor intake air temperature)
Normal operation state
Filter inspection
:
(7 Indoor intake air temperature)
Result
Normal
:
(8 Indoor heat exchanger temperature) –
Judgement
Cool
Stable Unstable
heat exchanger temperature)
:
Check item
:
Temperature (5 Discharge temperature) – (8 Indoor
Cool mode
Area
:
heat exchanger temperature)
controller?
Time
Decorative panel
Temperature (5 Discharge temperature) – (4 Outdoor
Indoor heat exchanger temperature)
: HEAT
9 Filter operating time*
Stable Unstable
(7 Indoor intake air temperature) – (8
COOL
(Air/discharge temperature)
Result
controller?
Cool
CleanliTemperature
ness
Temperature
Cleanliness
Enter the temperature differences between 5 , 4 , 7 and 8 into
the graph given below.
Operation state is determined according to the plotted areas on
the graph.
For data measurements, set the fan speed to "Hi" before activating maintenance mode.
M"
(Voltage)
pressor
Outdoor Unit
Good
(Insulation resistance)
Com-
Indoor Unit
Terminal block
Check Points
Result
Breaker
Heat
Loose connection
Power supply
Inspection item
45
40
Inspection C
Filter inspection
35
30
25
Normal
20
15
10
Inspection B
Inspection A
5
0 10
20 30 40 50 60 70 80
:
[5 Discharge temperature] – [8 Indoor
heat exchanger temperature)
14
DISASSEMBLY PROCEDURE
PUHZ-P200YKA.UK
PUHZ-P200YKAR1.UK
PUHZ-P250YKA.UK
PUHZ-P250YKAR1.UK
PHOTOS
OPERATING PROCEDURE
1. Removing the service panel and top panel
(1)Removetheservicepanelfixingscrews(4forfront/5x
12),thenslidetheservicepaneldownwardtoremoveit.
(Theservicepanelisfixedtothesidepanel(R)witha
hookontherightside.)
(2)Removethetoppanelfixingscrews(3forfrontand3for
rear/5x12)toremovethetoppanel.
Note: When removing service panel and top panel at the
same time, count one less screw since they share a
screw.
Photo 1
Toppanelfixingscrews
Toppanel
Servicepanel
Wire
grille
fixing
screws
Sidepanel(R)
Slide
Wire
grille
fixing
screws
Servicepanel
fixingscrews
Coverpanel(rear)
Coverpanel(front)
fixingscrews
Coverpanel(front)
2. Removing the fan motor (MF1, MF2)
(1)Removetheservicepanel.(SeePhoto1)
(2)Removethewiregrillefixingscrews(4forfront/5x12),
thenslidethewiregrilleupwardtoremoveit.(SeePhoto1)
(Fortheeachfanmotorontopandunder)
(3)Removethescrewofnut(1forfront/M6),thenslidethe
propellerfanforwardtoremoveit.
(Fortheeachfanmotorontopandunder)
(4)Disconnecttheconnectors,CNF1(WHT)andCNF2(WHT)
onthecontrollercircuitboardintheelectricalpartsbox.
(SeePhoto4)
(5)Loosentheclampfortheleadwireonmotorsupportand
separator.
(6)Releasetheleadwirefromtheholeonseparator.
(7)Removethefanmotorfixingscrews(4forfront/5x20)to
removethefanmotor.
(Fortheeachfanmotorontopandunder)
Photo 2
Frontpanel
Propeller
Nut
Photo 3
Fanmotor
fixingscrews
Fanmotor
Fanmotor
fixingscrews
OCH582B
95
PHOTOS
OPERATING PROCEDURE
3. Removing the electrical parts box
Photo 4
(1)Removetheservicepanel.(SeePhoto1)
(2)Removethetoppanel.(SeePhoto1)
(3)Disconnectthepowersupplycablefromterminalblock.
(4)Disconnecttheindoor/outdoorconnectingwirefrom
Controller
terminalblock.
circuitboard
(5)DisconnecttheconnectorCNF1(WHT),CNF2(WHT),
TH3(WHT),TH7/6(RED),TH32(BLK),63H(YLW),21S4
(GRN),LEV-A(WHT)fromthecontrollercircuitboard.
<Symbolsontheboard>
•Fanmotor(CNF1,CNF2)
•Thermistor<Liquid>(TH3)
Terminalblock
•Thermistor<Ambient/2-PhasePipe>(TH7/6)
(Powersupply)
•Thermistor<Comp.Surface>(TH32)
•Highpressureswitch(63H)
•4-wayvalve(21S4)
•LEV(LEV-A)
(6)Loosentheclamps,fastenersandcablestrapforthelead
wireintheelectricalpartsboxandseparator.
Valvebed
(7)Loosentheleadwiresfixedtothepipeswithbands.
fixingscrew
(8)TodisconnecttheCOMPleadwire,removetheterminal
cover,thenremovetheCOMPleadwirefixingscrews(4
forfront/5x12).
(9)Removetheelectricalpartsboxfixingscrews(2forfront/
Valvebed
4x10),thenslidetheelectricalpartsboxupwardto
removeit.
(Theelectricalpartsboxisfixedtothesidepanel(R)with
ahookontherightside,andtotheseparatorductwitha
hookontheleftside.)
Terminal
cover
Compressor
OCH582B
96
Electricalpartsbox
Electricalparts
boxfixingscrews
Terminalblock
(Indoor/Outdoor)
Sidepanel(R)
Valvebed
fixingscrews
PHOTOS
OPERATING PROCEDURE
4. Disassembling the electrical parts box
Photo 5
(1)Disconnectalltheconnectorsonthecontrollercircuitboard.
(2)Toremovethecontrollercircuitboard,releaseitfromthe
support.
(3)Removecontbasefixingscrews(2forfront/4x10).(Photo5)
(Thecont.baseisfixedtothecontbasepiecewithahook
ontheleftside.)
Screw
(4)Disconnectalltheconnectorsonthenoisefiltercircuit
board.(Photo6)
(5)Toremovethenoisefiltercircuitboard,releaseitfromthesupport.
(6)RemoveN.F.basefixingscrews(2forfront/4x10).(Photo7)
(7)Disconnectalltheconnectorsonthepowercircuitboard.
(8)Toremovethepowercircuitboard,removepowerboardfixing
screws(4forfront/4x12),thenreleasetheboardfromthe
support.(Photo8)
(9)Thereactorisattachedtotherearsideoftheelectrical
partsbox.(Photo9)
(Toremovethereactor,theelectricalpartsboxmustbe
separatedfromtheoutdoorunit.)
Note: When reassembling the electrical parts box, make
sure the wirings are correct.
Photo 7
Photo 6
Noisefilter
circuitboard
(N.F.)
Screw
Photo 9
Photo 8
Contbase
Controller
circuitboard(C.B.)
Screw
Noisefilter
base
Screw
Reactor
Screws
Screws
Screws
Screws
Powercircuit
board(P.B)
5. Removing the thermistor <2-Phase Pipe> (TH6)
(1)Removetheservicepanel.(SeePhoto1)
(2)Removethetoppanel.(SeePhoto1)
(3)DisconnecttheconnectorTH7/6(RED)onthecontroller
circuitboardintheelectricalpartsbox.(SeePhoto4)
(4)Loosenthefastenerfortheleadwireintheelectricalpartsbox.
(5)Loosentheclampfortheleadwireonthetopofelectricalpartsbox.
(6)Pulloutthethermistor<2-phasepipe>(TH6)fromthermistorclip.
Photo 10
Electricalpartsbox
Cont.boxtop
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-phasepipe>
(TH6)
OCH582B
97
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: W
hen 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).
Lead wire of thermistor <Ambient> (TH7)
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.
Photo 12
Damper
Thermistor
<Comp. Surface>
(TH32)
OCH582B
Sensor holder
98
Thermistor <Liquid> (TH3)
Compressor
Valve bed
PHOTOS
OPERATING PROCEDURE
8. Removing the 4-way valve coil (21S4), LEV coil (LEV (A))
and lead wire for high pressure switch.
(1)Removetheservicepanel.(SeePhoto1)
(2)Removethetoppanel.(SeePhoto1)
(3)Removetheelectricalpartsbox.(SeePhoto4)
(4)Loosentheclampfortheleadwireonseparator.
Photo 13
Highpressure
switch
[Removing the lead wire for high pressure switch]
(5)Disconnecttheleadwirefromthehighpressureswitch.
[Removing the 4-way valve coil]
(5)Removethe4-wayvalvecoilfixingscrew(1forfront/M5)
toremovethe4-wayvalvecoil.
(6)Slidethe4-wayvalvecoilforwardtoremoveit.
[Removing the LEV coil]
(5)Loosentheleadwiresfixedtothepipeswithbands.
(6)SlidetheLEVcoilupwardtoremoveit.
4-wayvalve
coil(21S4)
LEVcoil
(LEVA)
Accumulator
9. Removing the 4-way valve, LEV (LEV (A)) and high
pressure switch.
(1)Removetheservicepanel.(SeePhoto1)
(2)Removethetoppanel.(SeePhoto1)
(3)Removetheelectricalpartsbox.(SeePhoto4)
(4)Removethecoverpanel(front).(SeePhoto1)
(5)Removethecoverpanel(rear).(SeePhoto1)
(6)Removethevalvebed.(SeePhoto14)
(7)Removethesidepanel(R).
(8)Recoverrefrigerant.
[Removing the 4-way valve]
(9)Removethe4-wayvalvecoil.(Seephoto13)
(10)Removetheweldedpartof4-wayvalve(4positions)to
removethe4-wayvalve.
[Removing the LEV]
(9)RemovetheLEVcoil.(Seephoto13)
(10)Removetheweldedpartof4-wayvalve(4positions)to
removethe4-wayvalve.
[Removing the high pressure switch]
(9)Disconnecttheleadwirefromthehighpressureswitch.
(10)Removetheweldedpartofhighpressureswitch
(1position)toremovethehighpressureswitch.
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
OCH582B
99
OPERATING PROCEDURE
PHOTOS
10. Removing the compressor (MC)
Photo 14
(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)
Valve bed
(4) Remove the cover panel (front). (See Photo1)
(5) Remove the cover panel (rear). (See Photo 1)
Valve bed
(6) Remove the valve bed. (See photo 14)
fixing screw
(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.
Separator
(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).
Separator
(13) Remove the 3 compressor fixing nuts (M6) to remove the
fixing screw
compressor.
Accumulator
Compressor
(MC)
Compressor
fixing nut
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The compressor can be easily removed by
removing separator.
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
remove the accumulator.
(10) Remove 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.)
Valve
bed
fixing
screws
Photo 15
Inlet
Outlet
Compressor
(MC)
Accumulator
Note: Recover refrigerant without spreading it in the air.
Receiver leg
fixing screws
OCH582B
100
Receiver
leg
OCH582B
101
HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
CCopyright 2014 MITSUBISHI ELECTRIC CORPORATION
Distributed in Jun. 2015 No.OCH582 REVISED EDITION-B
Distributed in Jan. 2015 No.OCH582 REVISED EDITION-A
Distributed in Oct. 2014 No.OCH582
Made in Japan
New publication, effective Jun. 2015
Specifications are subject to change without notice.
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