Mitsubishi Electric PUZ-HA30NHA5, PUZ-HA36NHA5 Service Manual
SERVICE MANUAL
CONTENTS
1. REFERENCE MANUAL ·································· 2
2. SAFETY PRECAUTION ·································· 2
3. FEATURES ······················································ 6
4. SPECIFICATIONS ··········································· 7
5. DATA ································································ 8
6. OUTLINES AND DIMENSIONS ···················· 10
7. WIRING DIAGRAM ·········································11
8. WIRING SPECIFICATIONS ··························· 12
9.
REFRIGERANT SYSTEM DIAGRAM
·············· 16
10. TROUBLESHOOTING ··································· 17
11. EASY MAINTENANCE FUNCTION··············· 73
12. FUNCTION SETTING ···································· 75
13.
MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER
············ 84
14. DISASSEMBLY PROCEDURE ······················ 94
R410A
Notes:
• This manual describes service
data of the outdoor units only.
• RoHS compliant products have
<G> mark on the spec name
plate.
[Model Name]
PUZ-HA30NHA5
PUZ-HA36NHA5
[Service Ref.]
PUZ-HA30NHA5
PUZ-HA36NHA5
PARTS CATALOG (OCB607)
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
No. OCH607
October 2015
2
2 SAFETY PRECAUTION
1
REFERENCE MANUAL
Before obtaining access to terminal, all supply circuits must be disconnected.
Preparation before 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.
Precautions during the repair service.
• 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.
2-1. ALWAYS OBSERVE FOR SAFETY
INDOOR UNIT
Model name Service Ref. Service manual No.
PLA-A18/30/36BA6 PLA-A18/30/36BA6 OCH581/OCB581
PKA-A18HA6 PKA-A18HA6 OCH580/OCB580
PKA-A30/36KA6 PKA-A30/36KA6.TH OCH584/OCB584
PEA-A18AA6 PEA-A18AA6.TH HWE08070
PEAD-A30/36AA5 PEAD-A30/36AA5 HWE14030
PCA-A30/36KA6 PCA-A30/36KA6 OCH585/OCB585
PVA-A30/36AA4 PVA-A30/36AA4 HWE14060
OCH607
3
Cautions for units utilizing refrigerant R410A
2-2. CAUTIONS RELATED TO NEW REFRIGERANT
Use new refrigerant 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.
Store the piping indoors, and both ends of the
piping sealed until just before brazing.
(Leave elbow joints, etc. in their packaging.)
The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
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.
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.
Contamination inside refrigerant piping can cause deterioration of refrigerant oil, etc.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of compressor.
If large amount of mineral oil enters, that can cause deterioration of refrigerant oil, etc.
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.
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.
Flare tool
Electronic refrigerant
charging scale
Vacuum pump adaptor
Size adjustment gauge
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
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.
OCH607
4
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specifications
1 Gauge manifold · Only for R410A
· Use the existing fitting
specifications
.
· Use high-tension side pressure of 5.3MPa·G or over.
2 Charge hose · Only for R410A
· Use pressure performance of 5.09MPa·G or over.
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 · Only for R410A · Top of cylinder (Pink)
· Cylinder with syphon
8 Refrigerant recovery equipment
[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.)
OCH607
5
2-3. 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 time higher than that of R22, their sizes of flared sections and flare nuts are different.
1Thickness 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 7/256 in [0.7 mm] or below.)
2Dimensions 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 air tightness 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.
3Tools for R410A (The following table shows whether conventional tools can be used or not.)
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
1/32 [0.8]
1/32 [0.8]
1/32 [0.8]
5/128 [1.0]
—
1/32 [0.8]
1/32 [0.8]
1/32 [0.8]
5/128 [1.0]
5/128 [1.0]
Nominal
dimensions
(in)
Diagram below: Piping diameter and thickness
Outside
diameter
(mm)
Thickness
: in [mm]
R410A R22
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
11/32-23/64 [ 9.1]
1/2-33/64 [13.2]
41/64-21/32 [16.6]
49/64-25/32 [19.7]
—
9.0
13.0
16.2
19.4
23.3
Nominal
dimensions (in)
Flare cutting dimensions
Outside
diameter (mm)
Dimension A
( )
+0
-0.4
R410A R22
(mm)(in [mm])
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
43/64 [17.0]
7/8 [22.0]
1-3/64 [26.0]
1-9/64 [29.0]
17.0
22.0
24.0
27.0
36.0
Nominal
dimensions (in)
Flare nut dimensions
Outside
diameter (mm)
Dimension B
(in [mm])
R410A
R22 (mm)
—
Gauge manifold
Charge hose
Gas leak detector
Refrigerant recovery equipment
Refrigerant cylinder
Applied oil
Safety charger
Charge valve
Vacuum pump
Flare tool
Bender
Pipe cutter
Welder and nitrogen gas cylinder
Refrigerant charging scale
Vacuum gauge or thermistor vacuum gauge and
vacuum valve
Charging cylinder
Air purge, refrigerant charge
and operation check
Gas leak check
Recover refrigerant
Refrigerant charge
Apply to flared section
Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant
Prevent gas from blowing out
when detaching charge hose
Vacuum drying and air
purge
Flaring work of piping
Bend the pipes
Cut the pipes
Weld the pipes
Recover refrigerant
Check the degree of vacuum. (Vacuum
valve prevents back flow of oil and refrigerant to thermistor vacuum gauge)
Recover refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Tool for HFC refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Ester oil and alkylbenzene
oil (minimum amount)
Tool exclusive for R410A
Tool exclusive for R410A
Tools for other refrigerants can
be used if equipped with adopter for reverse flow check
Tools for other refrigerants
can be used by adjusting
flaring dimension
Tools can be used for other refrigerants
Tools can be used for other refrigerants
Tools can be used for other refrigerants
Tools can be used for other refrigerants
Tools can be used for other
refrigerants
Tool exclusive for R410A
Tools and materials Use R410A tools Can R22 tools be used?
(Usable if equipped
with adopter for rever se flow)
(Usable by adjusting
flaring dimension)
: 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.
Dimension A
Dimension B
OCH607
6
3 FEATURES
HIGH HEATING CAPACITY
Industry-first flash injection circuit is equipped, which enables to
keep the equal capacity to the rating even when outside temperature is 5°F [−15°C].
HIGH SPEED HEATING START UP
The performance of heating start up is improved. Compared to
PUZ-A type, Hyper Heating Inverter reduced the time for heating start up by about half. After starting operation, the airflow
temperature goes up to 105°F [41°C] quickly in 10 minutes. With
industry first shorter and less frequent defrost, defrosting time is
cut down by 15% compared to PUZ-A type and heating operation
can continuously run for maximum 150 minutes.
WIDE HEATING RANGE
The heating range is expanded to −13°F [−25°C] compared to
PUZ-A type which is up to 10°F [−12°C].
CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT.
Maximum 100 ft, 30m
The refrigerant circuit with LEV (Linear Expansion Valve) and power receiver always control the optimal refrigerant level
regardless of the length (maximum: 100 ft [30 m] and minimum: 16 ft [5 m]) of piping. The additional refrigerant charging work during installation often causes problems. It is completely eliminated by chargelss system. This unique system
improves the quality and reliability of the work done. It also helps to speed up the installation time.
PUZ-HA30NHA5
PUZ-HA36NHA5
Outdoor W.B. temp.
Heating capacity
-13°F
[-25°C]
-4°F
[-20°C]
5°F
[-15°C]
14°F
[-10°C]
23°F
[-5°C]
32°F
[0°C]
A36
HA36
40,000
(Btu/h)
30,000
23,500BTU/h
38,000BTU/h
0
Performance
about
60%UP
33,000Btu/h
(Outlet air temp.
105°F[41°C])
About 5min.
Stable
About 50% CUT
Elapsed time(min.)
Heating capacity(peak)
About 10 min.
When stabled,
hot air of 122˚F[50˚C]
PUZ-A type:
Outlet air temp. 105˚F[41˚C]
HA36
Outlet air temp.105˚F[41˚C]
w1
40,000
(Btu/h)
30,000
5 100
w1 Condition
Room temp. 70°F[21°C](D.B.) Outdoor temp. 35°F[1.7°C](D.B.) / 33°F[0.6°C](W.B.) : Hi notch
It does not become
122˚F[50˚C]
when outside air temp.
is too low.
0
Expanded
Up to -13
°F
Outdoor wet-bulb temperature
A36 type
HA36 type
-13°F
10°F
-13°F
[-25°C]
-4°F
[-20°C]
5°F
[-15°C]
14°F
[-10°C]
23°F
[-5°C]
32°F
[0°C]
OCH607
7
4 SPECIFICATIONS
Service Ref.
Power supply Phase Single
Cycle 60 Hz
Voltage 208/230 V
MCA A 28
MOCP A 40
Breaker size A 30
External finish Munsell 3Y 7.8/1.1
Heat exchanger Plate fin coil
Defrost method Reverse cycle
Crankcase heater
kW
—
Compressor Hermetic
Model
Motor output kW 2.5
R.L.A. 20
L.R.A. 27.5
Starter type Inverter
Fan Fan(drive) o No. Propeller fan o 2
Fan motor output
kW
0.086 + 0.086
Fan motor
F.L.A.
0.40 + 0.40
Airflow m
3
/min 100
CFM 3530
Sound level Cooling dB 52
Heating dB 53
Protection devices
HP switch
LP switch
Discharge thermo
Dimension W mm 950
D mm 330+30
H mm 1350
W in 37-12/32
D in 13 + 1-3/16
H in 53-5/32
Weight kg
lb
Refrigerant
Charged kg 5.5
R410A
lb 12
Control Linear expansion valve
Oil Model Ether (FV50S)
Charged L 1.4
oz 45
Refrigerant Pipe size OD mm 9.52
piping Liquid in 3/8
Pipe size OD mm 15.88
Gas in 5/8
Connection method Indoor Flared
Connection method Outdoor Flared
Height difference m Maximum 30
IU - OU ft Maximum 100
Piping length m Maximum 75
ft Maximum 245
PUZ-HA30NHA5
PUZ-HA36NHA5
ANB33FJEMT
120
265
OCH607
8
Piping Length (one way
)
Charged
Factory
Service Ref. 100 ft 110 ft 120 ft 130 ft 140 ft 150 ft 160 ft 165 ft
30 m 33 m 37 m 40 m 43 m 46 m 49 m 50 m
PUZ-HA30NHA5
PUZ-HA36NHA5
194 oz 200 oz 206 oz 212 oz 218 oz 224 oz 230 oz 237 oz 195 oz
5.5 kg 5.7 kg 5.9 kg 6.0 kg 6.2 kg 6.4 kg 6.6 kg 6.7 kg
180 ft 200 ft 210 ft 230 ft 245 ft
55 m 61 m 64 m 70 m 75 m
242 oz 254 oz 260 oz 272 oz 280 oz
6.9 kg 7.2 kg 7.4 kg 7.7 kg 7.9 kg 5.5 kg
Additional charge is required for pipes longer than 100 ft
.
Service Ref.
Compressor model
(")
Winding Resistance
U-V
U-W
W-V
(at 68°F [20°C])
PUZ-HA30NHA5
PUZ-HA36NHA5
ANB33FJEMT
0.188
0.188
0.188
5-1. REFILLING REFRIGERANT CHARGE (R410A: oz, kg)
5-2. COMPRESSOR TECHNICAL DATA
5
DATA
5-3. NOISE CRITERION CURVES
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
BAND CENTER FREQUENCIES, Hz
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
PUZ-HA30NHA5
PUZ-HA36NHA5
COOLING
MODE
HEATING
52
SPL(dB)
53
LINE
5 ft
3.3 ft
MICROPHONE
UNIT
GROUND
OCH607
9
PUZ-HA30NHA5
Representative matching
PKA-A36KA6
Mode
COOLING HEATING
Total Capacity BTU/h
33,500
2,790
38,000
3,410
Input W
Electrical circuit
Indoor unit model
PKA-A36KA6
Phase
Single
Cycle
60 Hz
Voltage
230 V
Current
0.36A
Outdoor unit model
PUZ-HA36NHA5
Phase
Single
Cycle
60Hz
Voltage
230V
Current
Refrigerant circuit
Discharge pressure MPa
Suction pressure MPa
Discharge temperature °C
Condensing temperature °C
Suction temperature °C
Ref. Pipe length m
Discharge pressure PSIG
Suction pressure PSIG
Discharge temperature °F
Condensing temperature °F
Suction temperature °F
Ref. Pipe length ft
side
Indoor
Intake air temperature DB °C
Intake air temperature WB °C
Discharge air temperature DB °C
side
Outdoor
Intake air temperature DB °C
Intake air temperature WB °C
side
Indoor
Intake air temperature DB °F
Intake air temperature WB °F
Discharge air temperature DB °F
side
Outdoor
Intake air temperature DB °F
Intake air temperature WB °F
SHF
BF
PKA-A30KA6
COOLING HEATING
12.2 A
2.58
0.87
70.8
44.4
10.5
7.6
374
126
159
112
51
25
26.7
19.4
12.5
35
23.9
80
67
55
95
75
0.71
0.09
15.4 A
2.94
0.73
75.6
49.7
2.8
7.6
427
106
168
121
37
25
21.1
15.6
43.5
8.3
6.1
70
60
110
47
43
—
—
30,000
2,500
32,000
2,930
PKA-A30KA6
0.57A
11.1 A
2.51
0.88
67.7
43.3
10.8
7.6
364
128
154
110
51
25
26.7
19.4
12.3
35
23.9
80
67
54
95
75
0.70
0.09
13.0 A
2.92
0.71
78.1
49.4
2.5
7.6
424
103
173
121
37
25
21.1
15.6
43.4
8.3
6.1
70
60
110
47
43
—
—
5-4. STANDARD OPERATION DATA
OCH607
10
6
OUTLINES AND DIMENSIONS
PUZ-HA30NHA5 Unit : mm<inch>
PUZ-HA36NHA5
Min. 1000mm
<39-3/8>
Min. 150mm
<5-29/32>
Min. 10mm
<3/8>
Min. 10mm
<3/8>
FREE
<Foundation bolt height>
FOUNDATION
Service space
Terminal Block
Left···Power supply wiring
Right····Indoor/Outdoor wiring
Earth terminal
Service panel
Handle
1
2
23<29/32>
1076<42-3/8>
* 1 447<17-19/32>
* 1 443<17-7/16>
Handle
Front piping cover
Rear piping cover
Air Discharge
Rear Air Intake
Side Air Intake
31<1-7/32>
145
<5-23/32>
145
<5-23/32>
220
<8-21/32>
30<1-3/16>
145
<5-23/32>
81<3-3/16>
219<8-5/8>
71<2-13/16>
71<2-13/16>
Bottom piping hole
(Knockout)
Drain hole
5-[33<1-5/16>
Handle
Side Air Intake
Air intake
Rear Air Intake
Handle
Handle
40<1-9/16>
74<2-19/32>
When installing the conduit.
Set the attachment to the
inner side of each panel.
2-[22.2<7/8>
1/2 Conduit attachment
45<1-25/32>
40<1-9/16>
65<2-9/16>
92<3-5/8>
27<1-1/16>
55<2-3/16>
23<29/32>
73<2-7/8>
63<2-1/2>
Rear piping hole
(Knockout)
Rear trunking hole
(Knockout)
Conduit hole
(2-[27<1-1/16>Knockout)
[92
<3-5/8>
19<3/4>
55<2-3/16>
92<3-5/8>
75
<2-31/32>
40<1-9/16>
73<2-7/8>
63<2-1/2>
23<29/32>
27<1-1/16>
92<3-5/8>
Right piping hole
(Knockout)
Right trunking hole
(Knockout)
Conduit hole
(2-[27<1-1/16>Knockout)
[92
<3-5/8>
92<3-5/8>
65<2-9/16>
45<1-25/32>
40<1-9/16>
27<1-1/16>
55<2-3/16>
23<29/32>
73<2-7/8>
63
<2-1/2>
Front piping hole
(Knockout)
Front trunking hole
(Knockout)
Conduit hole
(2-[27<1-1/16>Knockout)
[92
<3-5/8>
371<14-19/32>
330<13>30<1-3/16>
175<6-7/8>
600<23-5/8>
175<6-7/8>
42<1-21/32>66<2-5/8>
950<37-13/32>
322<12-11/16>
1350<53-5/32>
635<25>
19<3/4>
417<16-13/32>
370<14-9/16>
2-U Shaped notched hole
(Foundation Bolt M10<W3/8>)
56<2-7/32>
28<1-3/32>
53<2-3/32>
45<1-25/32>
2-12 o 36 Oval hole
(Foundation Bolt M10<W3/8>)
1····Refrigerant GAS pipe connection (FLARE)[15.88<5/8>
2····Refrigerant LIQUID pipe connection (FLARE)[ 9.52<3/8>
*1 ····Indication of STOP VALVE connection location.
Example of Notes
1 FREE SPACE (Around the unit)
2 SERVICE SPACE
3 FOUNDATION BOLTS
4 PIPING-WIRING DIRECTIONS
Piping Knockout Hole Details
The diagram below shows a
basic example.
Explanation of particular details are
given in the installation manuals, etc.
Dimensions of space needed
for service access are
shown in the below diagram.
Please secure the unit firmly
with 4 foundation (M10<W3/8>)
bolts. (Bolts and washers must
be purchased locally.)
Piping and wiring connections
can be made from 4 directions:
front, right, rear and below.
Min.
10mm<3/8>
Min.
500mm
<19-11/16>
Min.
500mm
<19-11/16>
Min.
150mm
<5-29/32>
Min.
30mm
<1-3/16>
OCH607
11
7
WIRING DIAGRAM
PUZ-HA30NHA5 PUZ-HA36NHA5
TB1
MC
MF1, MF2
21S4
63H
TH3
TH4
TH6
TH7
TH8
LEV-A, LEV-B, LEV-C
DCL
Terminal Block<Power Supply, Indoor/Outdoor>
Motor for Compressor
Fan Motor
Solenoid Valve (4-Way Valve)
High Pressure Switch
63L Low Pressure Switch
Thermistor<Liquid>
TH32
Thermistor<Suction>
TH33
Thermistor<Ref. check>
Thermistor<Discharge>
Thermistor<2-Phase Pipe>
Thermistor<Ambient>
Thermistor
<Heat Sink
>
Linear Expansion Valve
Reactor
P.B.
Power Circuit Board
ACTM
Active Filter Module
CB
Main Smoothing Capacitor
CY1, CY2
Capacitor
Noise Filter Circuit Board
N.F.
Controller Circuit Board
C.B.
SYMBOL NAME SYMBOL NAME
Switch<Function Switch>
Switch<Function Switch>
Switch<Function Switch>
Switch
<Manual Defrost, Defect History Record
Reset, Refrigerant Address>
Switch<Test Operation>
Switch<Function Switch, Model Select>
Switch<Model Select>
SW7
SW1
SW4
SW5
SW6
SW8
SW9
Switch<Pump Down>
SWP
Connector<Emergency Operation>
CN31
F1, F2, F3, F4
CNM
CNMNT
CNVMNT
CNDM
Connector<Connection for Option>
CN51
Fuse<T6.3AL250V
>
SS
Connector<Connection for Option>
Connector<Connection for Option>
Connector<Connection for Option>
Connector<Connection for Option>
Connector<Connection for Option>
1 2 3 4 5 6 7 8
MODEL
SW6
*
1 MODEL SELECT
*
2 SW5 -1 to 5 : Function Switch
SW5-6 *2
OFF
ON
30N
OFF
ON
1 2 3 4 5 6
1 2 3 4 5 6 7 8
OFF
ON
36N
OFF
ON
1 2 3 4 5 6
The black square(■)indicates a switch position.
SYMBOL
M-NET ADAPTER
NAME
TB7
CN5
CND
CN2M
Terminal Block<M-NET connection>
Connector<Transmission>
Connector<Power Supply>
Connector<M-NET communication>
CN5
(WH)
3 1
TB7
2
1
CND
(WH)
CN2M
(WH)
M-NET ADAPTER
M-NET
A B S
When M-NET Adapter is connected
CNVMNT
(WH)
31
CNDM
(WH)
CN51
(WH)
1
3
1
5
CNMNT
(WH)
CNM
(WH)
51
LEV-A
(WH)
LEV-A
C. B.
LEV-B
(RD)
LEV-B
6
3
5
5
1
TH7/6
(RD)
63H
(YE)
TRANS
X55
X51
TH3
(WH)
CNDC
(PK)
CNF1
(WH)
CNF2
(WH)
TH4
(WH)
TH7 TH6 TH3 TH4
41 21
TH32
(BK)
TH32
2
1 2 1
SW7
SW6SW1
SW9
CN31
141
MF1
MF2
M M
7
1
CN2
(WH)
CNS
(WH)
CNAC
(WH)
CN4
(WH)
SV2
(BU)
SS
(WH)
21S4
(GN)
2
1
LED1
LED2
X52
F1
F2
F4
F3
*1*
1
21
43
SW5SW8SW4 SWP
IPM
UVW
21S4
61
31
7
1
3
1
2
3 1
71
LEV-C
(BU)
6
1
7
2
TH33
(YE)
TH33
31
13 13 13
CN52C
(RD)
221
TABN
TABP
CN3
(WH)
CNAF
(WH)
CN2
(WH)
CN4
(WH)
CN5
(RD)
TH8
CB
1
4
1
7
7
1
2
1
2
1
2
2
2
3
2
6
RD
RD
TABP2
WH
WH
P. B.
CNDC
(PK)
TABU
TABV
TABW
BK
WH
DS2
DS3
TABT
TABS
TABP1
TABN1
BK
1
TABN2
WH
WH
BU
BU
RD
CY1
CY2
LI NI
LO NO
EI
E2
POWER SUPPLY
208/230VAC 60Hz
TO INDOOR
UNIT
TB1
L1 L2 GR S1 S2 S3
N. F.
MC
1
2
2
3
1
3
1
1
2
2
CN5
(RD)
RD
RD
CNAC1
(WH)
CNAC2
(RD)
CN52C
(BK)
BU
DCL
ACTM
L1
L2
N2
N1
P
Io
RD
BK
RD
WH
WH
BK
61
4
BU
YEGNOG
BN
63H
63L
(RD)
31
63L
LEV-C
M
5
3
5
1
RD
5
*
Use copper supply wires.
Utilisez des fils d'alimentation en cuivre.
BK
BK
OCH607
12
8
WIRING SPECIFICATIONS
8-1. INDOOR UNIT POWER SUPPLIED FROM OUTDOOR UNIT
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
1:1 System Simultaneous twin system
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 cords
F Remote controller
G Indoor unit
H Indoor unit earth
S1
S2
L1
L2
GR
1
2
S1
S2
S3
S3
1
2
S1
S2
S3
1
2
S1
S2
S3
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.
Affix a label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.
Indoor unit model
PLA-A18, 30
PCA-A30, PKA-A18, 30, 36
PLA-A36
PCA-A36
1A 2A
15A 15A
– –
A
D
C
B
S1
S2
L1
L2
GR
S3
A
D
C
B
E
F
E
F
GG G
HH H
Indoor unit power supply
Minimum circuit ampacity
Maximum rating of overcurrent protective device
*1. Maximum 147 ft [45 m]
If AWG13 is used, maximum 164 ft [50 m].
If AWG13 is used and S3 is separated, maximum 262 ft [80 m].
*2. The 30 ft [10 m] wire is attached in the remote controller accessory. Maximum 1500 ft
*3. 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.
*4. Use earth leakage breaker (NV)
1. Wiring size must comply with the applicable local and national code.
2. Use copper supply wires.
3. Use wires rated 600V or more for the power supply cables and the indoor/outdoor unit connecting cables.
4. Install an earth longer than other cables.
Notes:
Outdoor unit model
Outdoor unit power supply
Breaker size
Minimum circuit ampacity
Maximum rating of overcurrent protective device
Outdoor unit power supply
Outdoor unit power supply earth
Indoor unit-Outdoor unit *1
Indoor unit earth
Remote controller-Indoor unit *2
Outdoor unit L1-L2 *3
Indoor unit-Outdoor unit S1-S2 *3
Indoor unit-Outdoor unit S2-S3 *3
Remote controller-Indoor unit *3
HA30
Single, 208/230 V, 60 Hz
30A
28A
40A
2 o Min. AWG 10
1 o Min. AWG 10
3 o AWG 16 (polar)
1 o Min. AWG 16
2 o AWG 22 (Non-polar)
208/230 V AC
24 V DC
Wiring
Wire No. o
size
Circuit
rating
S1
S2
S3
S1
S2
S3
A-Control
Outdoor Unit
3 poles isolator
208/230 V
Single phase
Isolator
A-Control
Indoor Unit
*4
• Turn on the main power when the ambient temperature is −4°F [−20°C] or higher.
• In below −4°F [−20°C] condition, it needs at least 4 hr standby to operate in order to warm the electrical parts.
208/230 V AC
12 V DC
OCH607
13
8-2. SEPARATE INDOOR UNIT/OUTDOOR UNIT POWER SUPPLIES
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
1:1 System
S1
S2
1
2
S1
S2
S3
S3
Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.
The optional indoor power supply terminal kit is required.
Outdoor unit power supply
Wiring circuit breaker or isolating switch
Outdoor unit
Indoor unit/outdoor unit connecting cords
Remote controller
Indoor unit
Indoor unit power supply
Simultaneous twin system
If the indoor and outdoor units have separate power supplies, refer to the table below.
Change the indoor unit electrical box wiring referring to the figure in the right and
the DIP switch settings of the outdoor unit control board.
Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.
Outdoor unit power supply
Wiring circuit breaker or isolating switch
Outdoor unit
Indoor unit/outdoor unit connecting cords
Remote controller
Indoor unit
Indoor unit power supply
ON
OFF 1 2
(SW8)
3
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)
Indoor unit specifications
Required
Required
*1. Maximum 165 ft [50 m]
*2. The 30 ft [10 m] wire is attached in the remote controller accessory . Maximum 1500 ft [500 m]
*3. The figures are NOT always against the ground.
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Use copper supply wires.
3. Use wires rated 300 V or more for the power supply cables.
4. Install an earth longer than other cables.
Indoor unit model
Indoor unit power supply
Minimum circuit ampacity
Maximum rating of overcurrent protective device
Indoor unit power supply
Indoor unit power supply earth
Indoor unit-Outdoor unit *1
Indoor unit earth
Remote controller-Indoor unit *2
Indoor unit L1-L2 *3
Indoor unit-Outdoor unit S1-S2 *3
Indoor unit-Outdoor unit S2-S3 *3
Remote controller-Indoor unit *3
PLA-A18, 30
PCA-A30, PKA-A18
PLA-A36, PCA-A36
Single 208/230 V, 60 Hz ,Single 208/230 V 60 Hz
1 A 2A
15A 15A
2
o Min. AWG16 2 o Min. AWG16
1
o Min. AWG16 1 o Min. AWG16
2
o AWG22 (polar) 2 o AWG22 (polar)
2
o AWG22 (Non-polar) 2 o AWG22 (Non-polar)
208/230 V AC
24 V DC 24 V DC
12 V DC 12 V DC
Circuit
rating
Connectors (connections when shipped
from the factory are for indoor unit power
supplied from outdoor unit)
Indoor unit power supplied from outdoor unit
(Initial setting)
If the indoor and
outdoor units have
separate power
supplies, change the
connections of the
connectors as shown
in the following
figure.
Connectors
Indoor unit
control board
Separate indoor unit/outdoor unit power
supplies
Indoor unit
control board
Note: There are three types of labels (labels A, B, and C).
Affix the appropriate labels to the units according to the wiring method.
S1
S2
1
2
L1
L2
L1
L2
GR GR
L1
L2
GR
S1
S2
S3
1
2
S1
S2
S3
S3
S1
S2
S3
L1
L2
GR
BLUE
BLUE
YELLOW
YELLOW
CN01
S1
S2
S3
L1
L2
GR
YELLOW
BLUE
BLUE
YELLOW
Wiring
Wire No.
o
size
– –
– –
A
Earth leakage breaker
B
C
D
E
F
G
H
Option
J
Option
J
A
Earth leakage breaker
B
C
D
E
F
G
H
A
J
J
D
C
B
E
F
G
A
D
E
F
G G
CN01
K
Indoor unit earth
K
208/230 V AC
H
C
B
C
B
H
C
B
L1
L2
GR
L1
L2
GR
OCH607
14
8-3. INDOOR – OUTDOOR CONNECTING CABLE
Note: The Maximum cable length may vary depending on the condition of installation, humidity or materials, etc.
Indoor unit-Outdoor unit
Outdoor power supply
Max. 147 ft [45 m]
3 o AWG15(polar)
Max. 164 ft [50 m]
3 o AWG13(polar)
Max. 262 ft [80 m]
3 o AWG13(polar) and S3 separated
Wire No. o Size
Be sure to connect the indoor-outdoor connecting cables directly to the units (no intermediate connections).
Intermediate connections can lead to communication errors if water enters the cables and causes insufficient
insulation to ground or a poor electrical contact at the intermediate connection point.
Indoor unit-Outdoor unit
Indoor/Outdoor separate
power supply
Max. 393 ft [120 m]
2 o Min. AWG22
Wire No. o Size
Note: The optional indoor power supply terminal kit is necessary.
8-4. M-NET WIRING METHOD
Points to notice:
(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 5cm. Do not put them in the same conduit tube.
(2) Terminal block (TB7) for transmission wires should never be connected to 208/230 V power supply. If it is connected,
electronic parts on M-NET P.C. board may be burnt out.
(3) Use 2-core x AWG16 [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.
It is acceptable if M-NET wire (non-polar, 2-cores) is arranged in addition to the wiring for A-control.
(4) Ground 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.
If there are more than 2 grounding spots on the shield wire, noise may enter into the shield wire because the ground wire and shield
wire form one circuit and the electric potential difference occurs due to the impedance difference among grounding spots. In case of
single spot grounding, noise does not enter into the shield wire because the ground wire and shield wire do not form 1 circuit.
To avoid communication errors caused by noise, make sure to observe the single spot grounding method described in the
installation manual.
Centralized
controller
Refrigerant
address 00
M-NET
address 01
A-control
remote
controller
A-control
remote
controller
A-control
remote
controller
Refrigerant
address 00
M-NET
address 02
Refrigerant
address 00
M-NET
address 03
Power
supply unit
Centralized
controller
M-NET transmission wire
O Bad example (Multi spot grounding of shield wire)
Good example 1 (Single spot grounding of shield wire)
Power
supply unit
M-NET type
outdoor unit
M-NET type
outdoor unit
M-NET type
outdoor unit
M-NET type
outdoor unit
M-NET transmission wire
M-NET type
outdoor unit
M-NET type
outdoor unit
M-NET type
outdoor unit
M-NET transmission wire
M-NET type
outdoor unit
M-NET type
outdoor unit
Good example 2 (Single spot grounding of shield wire)
Centralized
controller
Centralized
controller
Power
supply unit
Power
supply unit
OCH607
15
8-4-3. Regulations in address settings
In 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.
Note: Refrigerant addresses can be overlapped if they are in the different group.
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 “03” 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”.
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
series, 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.
Address number can be set by using rotary switches
(SW11 for ones digit and SW12 for tens digit), which
is located on the M-NET board of outdoor unit.
(Initial setting: all addresses are set to “0”.)
8-4-2. Refrigerant address setting
In case of multiple grouping system (multiple refrigerant circuits in one 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 1-6 on the outdoor controller board. [Initial setting:
all switches are OFF. (All refrigerant addresses are “00”.)]
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1 2
–
50
M-NET Address No.
<Setting example>
Switching
setting
SW11
ones
digit
SW12
tens
digit
OFF
ON
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
0
Refrigerant
address
OFF
ON
8
OFF
ON
1
OFF
ON
9
OFF
ON
10
OFF
ON
11
OFF
ON
12
OFF
ON
13
OFF
ON
14
OFF
ON
15
OFF
ON
2
OFF
ON
3
OFF
ON
4
OFF
ON
5
OFF
ON
6
OFF
ON
7
A-control
remote
controller
Group A Group B Group C
A-control
remote
controller
TB5
A-control
remote
controller
Refrigerant
address 00
M-NET
address 01
Refrigerant
address 00
M-NET
address 02
Refrigerant
address 01
M-NET
address 03
Refrigerant
address 00
M-NET
address 04
Power
supply unit
Centralized
controller
Power
supply unit
A-control
remote
controller
A-control
remote
controller
TB5
Group A Group B
Refrigerant
address 00
M-NET
address 01
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
Centralized
controller
●
M-NET wiring
(1) Use 2-core x AWG16 [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(M1), B(M2), 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 drive a screw
to fix an ground wire on the plate as shown on the right figure.
Transmission
wire
Shield
part
M-NET
terminal
block
Ground
wire
A B S
OCH607
16
9
REFRIGERANT SYSTEM DIAGRAM
PUZ-HA30NHA5 PUZ-HA36NHA5 Unit: mm (in)
Distributor
Thermistor TH7
(Ambient)
Heat exchanger
Refrigerant
GAS pipe
connection
[15.88(5/8)
Refrigerant
LIQUID pipe
connection
[9.52
(3/8)
Stop valve
(with service port)
Strainer
(#100)
Power
receiver
Linear
expansion valve-B
Linear
expansion valve-C
Linear expansion valve-A
Thermistor
TH6
(2-phase pipe)
Thermistor TH3
(Liquid)
Charge plug
(Low pressure)
Charge plug
(High pressure)
Heat inter change circuit
Thermistor TH4
(Discharge)
Compressor
Injection port
Strainer
(#50)
Solenoid valve
(4-way valve)
Strainer
(#100)
Strainer
(#100)
Strainer
(#100)
Strainer
(#100)
Muffler
Ball valve
Thermistor TH33
(Ref. check)
Thermistor
TH32
(Suction)
Low pressure
switch 63L
High pressure
switch 63H
Refrigerant flow in cooling
Refrigerant flow in heating
Thermistor TH8
(Heat sink)
Power circuit board
REFRIGERANT COLLECTING (PUMP DOWN)
When relocating or disposing of the indoor/outdoor unit, pump down the system following the procedures 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 “CEN-
TRALLY 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.
OCH607
17
10 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.
10-1. TROUBLESHOOTING
Unit conditions at service
Check code
Actions to be taken for service (summary)
The trouble is reoccurring.
Displayed
Not displayed
Judge what is wrong and take a corrective action according
to “10-4. SELF-DIAGNOSIS ACTION TABLE”.
Conduct trouble shooting and ascertain the cause of the
trouble according to “10-5. TROUBLESHOOTING BY
INFERIOR PHENOMENA”.
The trouble is not reoccurring.
Logged
Not logged
1 Consider 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, when the trouble
occurred, matters related to wiring, etc.
2
Reset check code logs and restart the unit after finishing
service.
3 There is no abnormality concerning of parts such as
electrical component, controller board, remote controller,
etc.
1 Re-check the abnormal symptom.
2
Conduct troubleshooting and ascertain the cause of the
trouble according to “10-5. TROUBLESHOOTING
BY
INFERIOR PHENOMENA”.
3 Continue to operate unit for the time being if the cause
is not ascertained.
4 There is no abnormality concerning of parts such as
electrical component, controller board, remote controller,
etc.
10-2. CHECK POINT UNDER TEST RUN
(1) Before test run
• After installation of indoor and outdoor units, piping work and electric wiring work, re-check that there is no refrigerant leak-
age, loosened connections and incorrect polarity.
• Measure impedance between the ground and the power supply terminal block (L1, L2) on the outdoor unit by 500 V Megger
and check that it is 1.0 M" or over.
Note: 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 requires higher ceiling settings or auto-recovery feature from power failure, make proper changes
of settings referring to the description of “12. FUNCTION SETTING".
Make sure to read operation manual before test run. (Especially items to secure safety.)
OCH607
18
F1 F2 F3 F4
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Test run
Input maintenance info.
Function setting
Check
Self check
F1 F2 F3 F4
Test run menu
Cursor
Service menu:
Test run
Drain pump test run
1
Select "Service" from the Main menu, and press the button.
2
Select "Test run" with the F1 or F2 button, and press the button.
Select "Test run" with the F1
or F2 button, and press the button.
F1 F2 F3 F4
Cool
Pipe
Auto
Switch disp.
Mode Fan
RemainTest run
F1 F2 F3 F4
Remain
Vane
Cool mode: Check the cold air blows out.
Heat mode: Check the heat blows out.
Press the F1
button to go through the operation modes in the order of "Cool
and Heat".
Check the auto vane with the F1
F2 buttons.
Press the
button to return to “Test run operation”.
Press the
button.
When the test run is completed, the “Test run menu” screen will appear.
The test run will automatically stop after 2 hours.
Test run operation
Auto vane check
Press the button and open the Vane setting screen.
Function buttons
F1 F2 F3 F4
MENU RETURN SELECT ON/OFF
10-2-1. Test run for wired remote controller
Check the operation of the outdoor unit fan.
OCH607
19
F1 F2 F3 F4
Error information
Error code
Error unit IU
Ref. address Unt#
Model name
Serial No.
ResetPage
Error information
Contact information
Dealer
Tel
ResetPage
Reset error: Reset button
Reset error: Reset button
blinks
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.
When an error occurs, the following screen will appear.
Check the error status, stop the operation, and consult your dealer.
Contact information (dealer's phone number) will appear if the information has
been registered.
F1 F2 F3 F4
F1 F2 F3 F4
Error information
Error reset
Error reset
Error code
Error unit IU
Ref. address Unt#
Model name
Serial No.
ResetPage
Reset current error?
Error reset
OKCancel
Main menu:
Reset error: Reset button
blinks
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.
Select "OK" with the
F4
button.
Navigating through the screens
• To go back to the Main menu ..........
button
<Error information>
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20
F1 F2 F3 F4
Main
Main display:
Cursor Page
Main menu
Restriction
Energy saving
Night setback
Filter information
Error information
blinks
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.
<Checking the error information>
<Error history>
F1 F2 F3 F4
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Test run
Input maintenance info.
Function setting
Check
Self check
Check menu
Cursor
Service menu:
Error history
Refrigerant volume check
Refrigerant leak check
Smooth maintenance
Request code
F1 F2 F3 F4
Error history
Page
Delete
Check menu:
Error Unt#
dd/mm/yy
Error history
Cancel OK
Delete error history?
Error history
Check menu:
Error history deleted
2
Select "Error history" with the F1 or F2 button, and press the button.
Select "Check" with the F1
or F2 button, and press the button.
3
Select "Error history" from the Check menu, and press the button to view
up to 16 error history records.
4 records are shown per page, and the top record on the rst page indicates
the latest error record.
Error history
4
To delete the error history, press the F4 button (Delete) on the screen that
shows error history.
A conrmation screen will appear asking if you want to delete the error history.
Press the F4
button (OK) to delete the history.
"Error history deleted" will appear on the screen.
Press the
button to go back to the Check menu screen.
Deleting the error history
1
Select "Service" from the Main menu, and press the button.
OCH607
21
10-2-3. Start and finish of test run [For outdoor controller board]
• 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.
1Set the operation mode (cooling/heating) using SW4-2.
2Turn on SW4-1 to start test run with the operation mode set by SW4-2.
3Turn off SW4-1 to finish the test run.
• There may be a faint knocking sound around the machine room after power is supplied.
However, this is not a problem with product because the linear expansion pipe is just moving to adjust opening pulse.
• There may be a knocking sound around the machine room for several seconds after com-
pressor starts operating. However, this is not a problem with product because the check
valve itself generates the sound because pressure difference is small 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.)
ON/OFF
TEMP
FAN
VANE
MODE
CHECK
LOUVER
TEST RUN
AUTO STOP
AUTO START
h
min
RESET
SET
CLOCK
TEST
RUN
COOL
7
5
6
2
3,4
Test run [for IR wireless remote controller]
Measure an impedance between the power supply terminal block on
the outdoor unit and ground with a 500 V Megger and check that it is
equal to or greater than 1.0 M".
1 Turn on the main power to the unit.
2 Press the
TEST RUN
button twice continuously.
(Start this operation from the turned off status of remote controller
display.)
TEST RUN
and current operation mode are displayed.
3 Press the
MODE
( ) button to activate
COOL
mode, then
check whether cool air blows out from the unit.
4 Press the
MODE
( ) button to activate
HEAT
mode, then
check whether warm air blows out from the unit.
5 Press the
FAN
button and check whether strong air blows out
from the unit.
6 Press the
VANE
button and check whether the auto vane operates
properly.
7 Press the ON/OFF button to stop the test run.
Notes:
• 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.
OFF
1 2
ON
<SW4>
A B
C D
A Stop C Operation
B Cooling D Heating
10-2-2. Test run for wireless remote controller
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22
F1 F2 F3 F4
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Test run
Input maintenance info.
Function setting
Check
Self check
kcehc fleS
:tceleS
Ref. address
sserddA
kcehc fleS
Ref. address
Return:
teseR
Error Unt # CI.prG
Self check
Return:
Reset
Ref. address
Error Grp.
--
-
Unt#
--
When there is no error history
Self check
Delete error history?
Ref. address
Cancel OK
Self check
Return:
Ref. address
Error history deleted
2
With theF1or
F2
button, enter the refrigerant address, and press the button.
Select "Self check" with the F1 or F2 button, and press the button.
1
Select "Service" from the Main menu, and press the button.
3
Check code, unit number, attribute will appear.
"-" will appear if no error history is available.
4
Resetting the error history.
Press the
F4
button (Reset) on the screen that shows the error history.
A conrmation screen will appear asking if you want to delete the error history.
Press the
F4
button (OK) to delete the error history.
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.
Navigating through the screens
• To go back to the Main menu ..........
button
• To return to the previous screen .......
button
10-3. HOW TO PROCEED "SELF-DIAGNOSIS"
10-3-1. Self-diagnosis
OCH607
23
If operations cannot be completed with the remote controller, diagnose the remote controller with this function.
F1 F2 F3 F4
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Maintenance password
Remote controller check
F1 F2 F3 F4
Remote controller check
:nigeB
Start checking?
Remote controller check
:nigeB
Start checking?
1
Select "Service" from the Main menu, and press the button.
Select "Remote controller check" with the F1
or F2 button, and press
the
button.
2
Select "Remote controller check" from the Service menu, and press the but-
ton to start the remote controller check and see the check results.
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.
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.
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. The remote controller needs replac-
ing.
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 interfer
ence.
Remote controller check results screen
If the button is pressed after the remote controller check results are displayed, remote controller check will end, and the remote controller will automati-
cally reboot itself.
10-3-2. Remote controller check
3
OCH607
24
• "CHECK" lights, and refrigerant
address "00" blinks.
• Check that the remote controller's
display has stopped before continuing.
• 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.)
• If an air conditioner error occurs, the
indoor unit's sensor emits an intermit tent buzzer sound, the operation lamp
blinks, and the check code is output.
(It takes 3 seconds at most for check
code to appear.)
• The check mode is cancelled.
[Procedure]
1. Press the CHECK button twice.
2. Press the TEMP buttons.
3. Point the remote controller at the
sensor on the indoor unit and
press the HOUR button.
4. Point the remote controller at the
sensor on the indoor unit and
press the ON/OFF button.
<Malfunction-diagnosis method at maintenance service>
10-3-4. Malfunction-diagnosis method by IR 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.
ON/OFF
TEMP
FAN
VANE
MODE
CHECK
LOUVER
TEST RUN
AUTO STOP
AUTO START
h
min
RESET
SET
CLOCK
CHECK
CHECK
display
Temperature
button
CHECK
button
Refrigerant
address
display
HOUR
button
ON/OFF
button
OCH607
25
[Output pattern A] Errors detected by indoor unit
[Output pattern B]
E9
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.
OPERATION
INDICATOR
lamp blink
pattern
Beep Beep Beep Beep Beep
Beep Beep
Off
Approx. 2.5 s
On
Approx. 3 s
On
0.5 sOn0.5 sOn0.5 s
On
0.5 s
Off
Approx. 2.5 sOnApprox. 3 sOn0.5 sOn0.5 s
··· Repeated
Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “U2”)
Number of blinks/beeps in pattern indicates
the check code in the following table
n
th
1st2nd3
rd
1st2
nd
Self-check
starts
(Start signal
received)
Beeper sounds
[Output pattern B]
OPERATION
INDICATOR
lamp blink
pattern
Beep
Beep Beep Beep Beep Beep Beep
Off
Approx. 2.5 sOn0.5 sOn0.5 s.On0.5 s
On
0.5 s
Off
Approx. 2.5 sOn0.5 sOn0.5 s
··· Repeated
Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “P5”)
Number of blinks/beeps in pattern indicates
the check code in the following table
n
th
1st2nd3
rd
1st2
nd
Self-check
starts
(Start signal
received)
Beeper sounds
• Refer to the following tables for details on the check codes.
[Output pattern A]
Notes:
*The check code in the parenthesis indicates PAR-30/31MAA model.
Beeper sounds/OPERATION
INDICATOR lamp blinks Check code
(Number of times)
IR wireless remote controller
Wired remote controller
Errors detected by unit other than indoor unit (outdoor unit, etc.)
Symptom Remark
1
Indoor/outdoor unit communication error
2
(Transmitting error) (Outdoor unit)
3
Open/short of outdoor unit thermistors
4
Compressor overcurrent interruption (When compressor locked)
5
Abnormal high discharging temperature/49C worked/
insufficient refrigerant
6
Abnormal high pressure (63H worked)/Overheating
protection operation
7
Abnormal temperature of heat sink
8
Outdoor unit fan protection stop
9
Compressor overcurrent interruption/Abnormal of power module
11
Abnormality such as overvoltage or voltage shortage and
abnormal synchronous signal to main circuit/Current sensor error
12
13
U2
U5
UP
U3,U4
UF
U1,Ud (UD)*
U8
U6
U9,UH
Others
–
–
–
–
14
Other errors
For details, check
the LED display
of the outdoor
controller board.
Compressor overcurrent interruption
Beeper sounds/OPERATION
INDICATOR lamp blinks 1 Check code
Symptom Remark
(Number of times)
IR wireless remote controller
Wired remote controller
1 P1
Intake sensor error
P9
Pipe (TH5) sensor error
2
P2
Pipe (TH2) sensor error
3 E6,E7
Indoor/outdoor unit communication error
4 P4
Drain sensor error/Float switch connector open
5
P5
PA
Drain pump error
Forced compressor stop (due to water leakage abnormality)
6 P6
Freezing/Overheating protection operation
7 EE
Communication error between indoor and outdoor units
8 P8
Pipe temperature error
9 E4, E5
Remote controller signal receiving error
10
–
11
–
–
–
12
14
Fb (FB)*
PL
Indoor unit control system error (memory error, etc.)
Refrigerant circuit abnormal
–
E0, E3
–
E1, E2
Remote controller control board error
Remote controller transmission error
As for indoor
unit, refer to
indoor unit's
service manual.
OCH607
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10-4. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is turned on>
Check code
Abnormal point and detection method Case
Judgment and action
None
—
1 No voltage is supplied to termi-
nal block(TB1) of outdoor unit.
a) Power supply breaker is
turned off.
b) Contact failure or disconnec-
tion of power supply terminal
c) Open phase (L1 or L2
phase)
2 Electric power is not charged
to power supply terminal of
outdoor power circuit board.
a) Contact failure of power
supply terminal
b) Open phase on the outdoor
power circuit board
Disconnection of connector
TABT or TABS
3 Electric power is not supplied
to outdoor controller circuit
board.
a) Disconnection of connector
(CNDC)
4 Disconnection of reactor (DCL)
5 Disconnection of outdoor noise
filter circuit board or parts failure in outdoor noise filter circuit
board
It is especially needed to check
the resistance RS1 on the
noise filter circuit board.
6 Defective outdoor power circuit
board
7 Defective outdoor controller
circuit board
1 Check following items.
a) Power supply breaker
b) Connection of power supply terminal
block (TB1)
c) Connection of power supply terminal
block (TB1)
2 Check following items.
a) Connection of power supply terminal
block (TB1)
b) Connection of terminal on outdoor
power circuit board
Disconnection of connector TABT or
TABS
Refer to "10-9. TEST POINT DIAGRAM".
3 Check connection of the connector (CNDC)
on the outdoor controller circuit board.
Check connection of the connector, CNDC,
on the outdoor power circuit board. Refer to
"10-9. TEST POINT DIAGRAM".
4 Check connection of reactor. (DCL)
Check connection of “L1” and “L2” on the
active filter module.(ACTM)
Refer to "10-9. TEST POINT DIAGRAM".
5 a) Check connection of outdoor noise filter
circuit board.
b) Replace outdoor noise filter circuit board.
Refer to "10-9. TEST POINT DIAGRAM".
6 Replace outdoor power circuit board.
7 Replace controller board (When items
above are checked but the units cannot be
repaired).
F3
(5202)
63L connector open
Abnormal if 63L connector circuit is open for
3 minutes continuously after power supply.
63L: Low pressure switch
1 Disconnection or contact failure
of 63L connector on outdoor
controller circuit board
2 Disconnection or contact failure
of 63L
3 63L is working due to refriger-
ant leakage or defective parts.
4 Defective outdoor controller
circuit board
1 Check connection of 63L connector on
outdoor controller circuit board.
Refer to "10-9. TEST POINT DIAGRAM".
2 Check the 63L side of connecting wire.
3 Check refrigerant pressure.
Charge additional refrigerant.
Check continuity by tester.
Replace the parts if the parts are defective.
4 Replace outdoor controller circuit board.
Note: Refer to indoor unit section for the
codes starting with P and E.
OCH607
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Check code
Abnormal point and detection method Judgment and action
Eb
(6845)
Miswiring of indoor/outdoor unit
connecting wire (converse wiring or disconnection)
Outdoor controller circuit board can
automatically set the unit number of indoor
units.
Abnormal if the indoor unit number cannot be set within 4 minutes after power on
because of miswiring (converse wiring or
disconnection) of indoor/outdoor unit connecting wire.
EC
(6846)
Startup time over
The unit cannot finish startup process
within 4 minutes after power on.
Case
1 Contact failure of indoor/
outdoor unit connecting wire
2 Diameter or length of indoor/
outdoor unit connecting wire is
out of specified capacity.
7 2 or more outdoor units have
refrigerant address “0”.
(In case of group control)
8 Noise has entered into power
supply or indoor/outdoor unit
connecting wire.
1 Contact failure or miswiring of
indoor/outdoor unit connecting
wire
2 Diameter or length of indoor/
outdoor unit connecting wire is
out of specified capacity.
4 Defective transmitting receiving
circuit of outdoor controller circuit
board
5 Defective transmitting receiving
circuit of indoor controller board
6 Defective indoor power board
7 2 or more outdoor units have
refrigerant address “0” .
(In case of group control)
8 Noise has entered into power
supply or indoor/outdoor unit
connecting wire.
Indoor/outdoor unit connector
miswiring, excessive number of units (4
units or more)
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 the number of
connected indoor units as “4 units or
more”.
1 Check disconnection or looseness or polar-
ity of indoor/outdoor unit connecting wire of
indoor and outdoor units.
2 Check diameter and length of indoor/outdoor
unit connecting wire.
Total wiring length: 262 ft [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.
3 Check 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.
7 Check if refrigerant addresses (SW1-3 to
SW1-6 on outdoor controller circuit board)
are overlapping in case of group control
system.
8 Check transmission path, and remove the
cause.
Note: The descriptions above 1–8 are for EA,
Eb and EC.
1 Contact failure or miswiring of
indoor/outdoor unit connecting
wire
2 Diameter or length of indoor/
outdoor unit connecting wire is
out of specified capacity.
3 4 or more indoor units are
connected to 1 outdoor unit.
4 Defective transmitting receiving
circuit of outdoor controller
circuit board
5 Defective transmitting receiving
circuit of indoor controller board
6 Defective indoor power board
7 2 or more outdoor units have
refrigerant address “0”.
(In case of group control)
8 Noise has entered into power
supply or indoor/outdoor unit
connecting wire.
EA
(6844)
F5
(5201)
63H connector open
Abnormal if 63H connector circuit is open for
3 minutes continuously after power supply.
63H: High pressure switch
1 Disconnection or contact failure
of 63H connector on outdoor
controller circuit board
2 Disconnection or contact failure
of 63H
3 63H is working due to defective
parts.
4 Defective outdoor controller
circuit board
1 Check connection of 63H connector on
outdoor controller circuit board.
Refer to "10-9. TEST POINT DIAGRAM".
2 Check the 63H side of connecting wire.
3 Check continuity by tester.
Replace the parts if the parts are defective.
4 Replace outdoor controller circuit board.
F9
(4119)
2 connector open
Abnormal if both 63H and 63L connector
circuits are open for 3 minutes continuously
after power supply.
63H: High pressure switch
63L: Low pressure switch
1 Disconnection or contact failure
of connector (63H,63L) on
outdoor controller circuit board.
2 Disconnection or contact failure
of 63H, 63L
3 63H and 63L are working due
to defective parts.
4 Defective outdoor controller
board
1 Check connection of connector (63H,63L) on
outdoor controller circuit board.
Refer to "10-9. TEST POINT DIAGRAM".
2 Check the 63H and 63L side of connecting
wire.
3 Check continuity by tester.
Replace the parts if the parts are defective.
4 Replace outdoor controller circuit board.
OCH607
28
<Abnormalities detected while unit is operating>
Check code
Abnormal point and detection method Judgment and action
U1
(1302)
High pressure (High-pressure switch
63H worked)
Abnormal if high-pressure switch 63H
worked (*) during compressor operation.
*602 PSIG [4.15 MPa]
63H: High pressure switch
1 Short cycle of indoor unit
2 Clogged filter of indoor unit
3 Decreased airflow caused by
dirt of indoor fan
4 Dirt of indoor heat exchanger
5 Locked indoor fan motor
6 Malfunction of indoor fan motor
7 Defective operation of stop
valve (Not full open)
8 Clogged or broken pipe
9 Locked outdoor fan motor
0 Malfunction of outdoor fan
motor
1 Short cycle of outdoor unit
2 Dirt of outdoor heat exchanger
3 Decreased airflow caused by
defective inspection of outside
temperature thermistor
(It detects lower temperature
than actual temperature.)
4 Disconnection or contact failure
of connector (63H) on outdoor
controller board
5 Disconnection or contact failure
of 63H connection
6 Defective outdoor controller
board
7 Defective action of linear
expansion valve
8 Malfunction of fan driving
circuit
1–6 Check indoor unit and repair defect.
7 Check if stop valve is fully open.
8 Check piping and repair defect.
9–2 Check outdoor unit and repair defect.
3 Check 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". )
4–6 Turn the power off and check F5 is
displayed when the power is on again.
When F5 is displayed, refer to “Judgment
and action” for F5.
7 Check linear expansion valve.
Refer to "10-6. HOW TO CHECK THE
PARTS".
8 Replace outdoor controller board.
Case
U2
(1102)
High discharge temperature
(1) Abnormal if discharge temperature
thermistor (TH4) exceeds 257˚F
[125:] or 230˚F [110:] continuously
for 5 minutes.
Abnormal if condenser/evaporator
temperature thermistor (TH5) exceeds
104˚F [40:] during defrosting and
discharge temperature thermistor (TH4)
exceeds 230˚F [110:].
(2) Abnormal if discharge superheat
(Cooling: TH4−TH5/Heating: TH4−TH6)
exceeds 126˚F [70:].
1 Overheated compressor opera-
tion caused by shortage of
refrigerant
2 Defective operation of stop
valve
3 Defective thermistor
4 Defective outdoor controller
board
5 Defective action of linear
expansion valve
6 Clogging with foreign objects in
refrigerant circuit.
Note: logging occurs in the parts
which become below
freezing point when water
enters in the refrigerant
circuit.
1 Check intake superheat.
Check leakage of refrigerant.
Charge additional refrigerant.
2 Check if stop valve is fully open.
34 Turn the power off and check if U3 is dis-
played when the power is on again.
When U3 is displayed, refer to “Judgment
and action” for U3.
5 Check linear expansion valve.
Refer to "10-6. HOW TO CHECK THE
PARTS".
6 After recovering refrigerant, remove water
from entire refrigerant circuit under vacuum
more than 1 hour.
<Abnormalities detected while unit is operating>
U3
(5104)
Open/short circuit of discharge
temperature thermistor (TH4)
Abnormal if open (37˚F [3:] or less) or
short (422˚F [217:] or more) is detected
during compressor operation.
(Detection is inoperative for 10 minutes
of compressor starting process and for 10
minutes after and during defrosting.)
1 Disconnection or contact failure
of connector (TH4) on the outdoor controller circuit board
2 Defective thermistor
3 Defective outdoor controller cir-
cuit board
1 Check connection of connector (TH4) on the
outdoor controller circuit board.
Check breaking of the lead wire for ther-
mistor (TH4). Refer to "10-9. TEST POINT
DIAGRAM".
2 Check resistance value of thermistor
(TH4) or temperature by microcomputer.
(Thermistor/TH4: 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".)
3 Replace outdoor controller board.
OCH607
29
Thermistors
Open detection Short detection
Symbol Name
TH3,TH32,TH33
TH6
TH7
TH8
−40°F [−40:] or below
−40°F [−40:] or below
−40°F [−40:] or below
−17°F [−27:] or below
194°F [90:] or above
194°F [90:] or above
194°F [90:] or above
216°F [102:] or above
Thermistor <Liquid>, <Suction>, <Ref. check>
Thermistor <2-phase pipe>
Thermistor <Ambient>
Thermistor <Heat sink>
Check code
Abnormal point and detection method Case Judgment and action
U5
(4230)
Temperature of heat sink
Abnormal if heat sink thermistor (TH8)
detects temperature indicated below.
HA30, 36 ······························ 183˚F [84:]
1 The outdoor fan motor is
locked.
2 Failure of outdoor fan motor
3 Air flow path is clogged.
4 Rise of ambient temperature
5 Defective thermistor
6 Defective input circuit of out-
door power circuit board
7 Failure of outdoor fan drive cir-
cuit
12 Check outdoor fan.
3 Check air flow path for cooling.
4 Check if there is something which causes
temperature rise around outdoor unit.
(Upper limit of ambient temperature is 114˚F
[46:].) Turn off power, and on again to
check if U5 is displayed within 30 minutes.
If U4 is displayed instead of U5, follow the
action to be taken for U4.
5 Check resistance value of thermistor (TH8)
or temperature by microcomputer.
(Thermistor/TH8: Refer to "10-6. 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.
U4,
TH32, TH33
(TH3:5105)
(TH6:5107)
(TH7:5106)
(TH8:5110)
Open/short of outdoor unit thermistors
(TH3, TH32, TH33, TH6, TH7, and TH8)
Abnormal if open or short is detected during compressor operation.
Open detection of thermistors
TH3,TH32,TH33 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) (Refer to
"10-10. FUNCTION OF SWITCHES,
CONNECTORS AND JUMPERS".)
1 Check connection of connector
(TH3,TH,32,TH33,TH7/6) on the outdoor
controller circuit board. Check connection of
connector (CN3) on the outdoor power circuit
board. Check breaking of the lead wire for
thermistor (TH3,TH32,TH33,TH6,TH7,TH8).
Refer to "10-9. TEST POINT DIAGRAM".
2 Check resistance value of thermistor
(TH3,TH32,TH33,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".)
3 Replace outdoor controller circuit board.
Note: Emergency operation is available in case
of abnormalities of TH3,TH32,TH33,TH6
and TH7. Refer to "10-8. EMERGENCY
OPERATION".
U6
(4250)
Power module
Check abnormality by driving power module in case overcurrent is detected.
(UF or UP error condition)
1 Outdoor stop valve is closed.
2
Decrease of power supply voltage
3 Looseness, disconnection or
converse of compressor wiring
connection
4 Defective compressor
5 Defective outdoor power circuit
board
1 Open stop valve.
2 Check facility of power supply.
3 Correct the wiring (U·V·W phase) to com-
pressor. 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 Disconnection or contact failure
of connectors
Outdoor controller circuit
board:
TH3, TH32, TH33,TH7/TH6
Outdoor power circuit board:
CN3
2 Defective thermistor
3 Defective outdoor controller cir-
cuit board
(
(
U7
(1520)
Too low superheat due to low discharge
temperature
Abnormal if discharge superheat is continuously detected less than or equal to
5˚F[−15˚C] for 3 minutes even though linear expansion valve has minimum open
pulse after compressor starts operating for
10 minutes.
1 Disconnection or loose connec-
tion of discharge temperature
thermistor (TH4)
2 Defective holder of discharge
temperature thermistor
3 Disconnection or loose connection
of linear expansion valve’s coil
4 Disconnection or loose connec-
tion of linear expansion valve’s
connector
5 Defective linear expansion valve
12 Check the installation conditions of dis-
charge temperature thermistor (TH4).
3 Check the coil of linear expansion valve.
Refer to "10-7. HOW TO CHECK THE
COMPONENTS".
4 Check the connection or contact of LEV-A and
LEV-B on outdoor controller circuit board.
5 Check linear expansion valve. Refer to "10-6.
HOW TO CHECK THE PARTS".
OCH607
30
Check code
Abnormal point and detection method Case Judgment and action
U8
(4400)
Outdoor fan motor
The outdoor fan motor is considered to be
abnormal if the rotational frequency of fan
motor is abnormal when detected during
operation.
Fan motor rotational frequency is abnor mal if;
• 100 rpm or below detected continuously
for 15 seconds at 68˚F [20:] or more
outside air temperature
• 50 rpm or below or 1500 rpm or more
detected continuously for 1 minute.
1 Failure in the operation of the
DC fan motor
2 Failure in the outdoor circuit
controller board
1 Check or replace the DC fan motor.
2 Check the voltage of the outdoor circuit con-
troller board during operation.
3 Replace the outdoor circuit controller board.
(when the failure is still indicated even after
performing the remedy 1 above.)
U9
(4220)
To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6.
Refer to "10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS".
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 Replace outdoor power circuit board.
4 Check compressor for electrical insulation.
Replace compressor.
1 Decrease in power source
voltage, instantaneous stop.
2 Disconnection or loose
connection of CN52C on the
outdoor power circuit board/
controller circuit board
3 Defective converter drive circuit
in outdoor power circuit board
4 Defective 52C drive circuit in
outdoor power circuit board
5 Disconnection or loose
connection of CN2 on the
outdoor power circuit board/
controller circuit board
6 Power circuit failure on DC
supply for 18 V DC output on
outdoor controller circuit board
04
Input current sensor error/
L1-phase open error
• Decrease in input current
through outdoor unit to 0.1 A
only if operation frequency is
more than or equal to 40 Hz
or compressor current is more
than or equal to 6 A.
1 Defective input current detection
circuit in outdoor power circuit
board
2 Defective outdoor controller
circuit board
1 Replace outdoor power circuit board.
2 Replace outdoor controller circuit board.
Detailed
codes
01
Overvoltage error
• Increase in DC bus voltage to
400 V
1 Abnormal increase in power
source voltage
2
Disconnection of compressor
wiring
3 Defective outdoor power circuit
board
4 Compressor has a ground fault.
02
Undervoltage error
• Instantaneous decrease in DC
bus voltage to 200 V
1 Check the field facility for the power supply.
2 Check CN52C wiring.
3 Replace outdoor power circuit board.
4 Replace outdoor power circuit board.
5 Check CN2 wiring.
6 Replace outdoor controller circuit board.
20
PFC/IGBT error (Undervoltage)
• When compressor is running,
DC bus voltage stays at 310 V
or lower for consecutive 10
seconds
1 Incorrect switch settings on the
outdoor controller circuit board
for model select
2 Defective outdoor power circuit
board
3 Defective outdoor controller
circuit board
1 Correction of a model select
2 Replace outdoor power circuit board.
3 Replace outdoor controller circuit board.
OCH607
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