Mitsubishi Electric PUZ-HA30NHA4, PUZ-HA36NHA4, PUZ-HA36NHA, PUZ-HA30NHA, PUZ-HA30NHA2 Service Manual
...
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Outdoor unit
SERVICE MANUAL
Outdoor unit
[model name]
PUZ-HA30NHA4
PUZ-HA36NHA4
[Service Ref.]
PUZ-HA30NHA4
PUZ-HA36NHA4
July 2011
No. OCH504
R410A
NOTE:
• This manual describes only
service data of the outdoor
units.
• RoHS compliant products have
<G> mark on the spec name
plate.
PUZ-HA30NHA4
PUZ-HA36NHA4
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
10. TROUBLESHOOTING ··································· 17
11. EASY MAINTENANCE FUNCTION··············· 70
12. FUNCTION SETTING ····································73
13.
MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER
14. DISASSEMBLY PROCEDURE ······················91
·············· 16
············81
PARTS CATALOG (OCB504)
1-1. INDOOR UNIT
Model name Service Ref.
Service
Manual No.
PLA-A18/30/36BA4 PLA-A18/30/36BA4
PKA-A18HA4 PKA-A18HA4
OCH482/OCB482
OCH483/OCB483
PCA-A30/36KA4 PCA-A30/36KA4 OCH484/OCB484
PEA-A18AA4
PEAD-A30/36AA4
PEA-A18AA4.TH
PEAD-A30/36AA4
HWE08070
HWE09050
PKA-A30/36KA4 PKA-A30/36KA4.TH OCH488/OCB488
1
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.
REFERENCE MANUAL
2 SAFETY PRECAUTION
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
2 3
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 to be used indoors during
installation 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 followings.
· 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.
Cautions for units utilizing refrigerant R410A
5
Gravimeter
Unit
[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 syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
[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
· 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
specifications
.
4
2-3. CAUTIONS FOR REFRIGERANT PIPING WORK
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
0.8 [1/32]
0.8 [1/32]
0.8 [1/32]
1.0 [5/128]
—
0.8 [1/32]
0.8 [1/32]
0.8 [1/32]
1.0 [5/128]
1.0 [5/128]
Nominal
dimensions
(inch)
Diagram below: Piping diameter and thickness
Outside
diameter
(mm)
Thickness
: mm [inch]
R410A R22
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
9.1 [11/32-23/64]
13.2 [1/2-33/64]
16.6 [41/64-21/32]
19.7 [49/64-25/32]
—
9.0
13.0
16.2
19.4
23.3
Nominal
dimensions(inch)
Flare cutting dimensions
Outside
diameter(mm)
Dimension A
( )
+0
-0.4
Unit : mm [inch]
R410A R22
1/4
3/8
1/2
5/8
3/4
6.35
9.52
12.70
15.88
19.05
17.0 [43/64]
22.0 [7/8]
26.0 [1-3/64]
29.0 [1-9/64]
—
17.0
22.0
24.0
27.0
36.0
Nominal
dimensions(inch)
Flare nut dimensions
Outside
diameter(mm)
Dimension B
Unit : mm [inch]
R410A R22
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.
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 0.7mm [7/256 inch] 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 intensity, 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 intensity as shown below. Set copper pipe correctly referring to copper pipe flaring dimensions for R410A below. For 1/2 and 5/8 inch, the dimension B changes.
Use torque wrench corresponding to each dimension.
Dimension A
3Tools for R410A (The following table shows whether conventional tools can be used or not.)
5
Dimension B
7
3 FEATURES
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]
+1
40,000
(Btu/h)
30,000
5 100
+1 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 doesn’t 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]
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].
PUZ-HA30NHA4
PUZ-HA36NHA4
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 continuosly 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.
Max.100ft, 30m
The refrigerant circuit with LEV(Linear Expansion Valve) and power receiver always control the optimal refrigerant level
regardless of the length (max.: 100ft [30m] and mim.: 16ft [5m]) 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.
6
4 SPECIFICATIONS
Service Ref.
Power supply Phase Single
Cycle 60Hz
Voltage 208/230V
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) % No. Propeller fan % 2
Fan motor output
kW
0.086 + 0.086
Fan motor
F.L.A.
0.40 + 0.40
Airflow m3/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
lbs
Refrigerant
Charged kg 5.5
R410A
lbs 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 Max. 30
IU - OU ft Max. 100
Piping length m Max. 75
ft Max. 245
PUZ-HA30NHA4
PUZ-HA36NHA4
ANB33FJEMT
120
265
7
Piping Length (one way
)
Charged
Factory
Service Ref. 100ft 110ft 120ft 130ft 140ft 150ft 160ft 165ft
30m 33m 37m 40m 43m 46m 49m 50m
PUZ-HA30NHA4
PUZ-HA36NHA4
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
180ft 200ft 210ft 230ft 245ft
55m 61m 64m 70m 75m
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
Longer pipe than 100 ft,additional charge is required.
Service Ref.
Compressor model
()
Winding Registance
U-V
U-W
W-V
(
at 20°C,68°F
)
PUZ-HA30NHA4
PUZ-HA36NHA4
ANB33FJEMT
0.188
0.188
0.188
5
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-HA30NHA4
PUZ-HA36NHA4
COOLING
MODE
HEATING
52
SPL(dB)
53
LINE
5ft
3.3ft
MICROPHONE
UNIT
GROUND
DATA
5-1. REFILLING REFRIGERANT CHARGE (R410A : oz, kg)
5-2. COMPRESSOR TECHNICAL DATA
5-3. NOISE CRITERION CURVES
8 9
PUZ-HA30NHA2
Representative matching
PKA-A36KA4
Mode
COOLING HEATING
Total Capacity BTU/h
33,500
2,790
38,000
3,410
Input W
Electrical circuit
Indoor unit model
PKA-A36KA
Phase
Single
Cycle
60Hz
Voltage
230V
Current
0.36A
Outdoor unit model
PUZ-HA36NHA2
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-A30KA4
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-A30KA
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
11
6
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%36 Oval hole
(Foundation Bolt M10<W3/8>)
····Refrigerant GAS pipe connction (FLARE):15.88<5/8>
····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.
Explantion 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>
OUTLINES AND DIMENSIONS
PUZ-HA30NHA4 Unit : mm<inch>
PUZ-HA36NHA4
10
7
1 2 3 4 5 6 7 8
MODEL SW6
+1MODEL SELECT
The black square ( )indicates a switch position.
+
2. SW5 -1 to 5 : Function Switch
SW5-6+2
OFF
ON
30N
OFF
ON
1 2 3 4 5 6
TB1
MC
MF1, MF2
21S4
63H
Terminal Block<Power Supply, Indoor/Outdoor >
Motor for Compressor
Fan Motor
Solenoid Valve (Four-Way Valve)
High Pressure Switch
63L Low Pressure Switch
TABU/V/W
TABS/T
Connection Terminal<U/V/W-Phase>
Connection Terminal <L/N-Phase>
P.B.
Power Circuit Board
TH3,TH32,TH33
TH4
TH6
TH7
TH8
LEV-A, LEV-B,LEV-C
DCL
Thermistor<Outdoor Pipe>
Thermistor<Discharge>
Thermistor<Outdoor 2-Phase Pipe>
Thermistor<Outdoor>
Thermistor<Heatsink>
Electronic Expansion Valve
Reactor
ACTM
Active Filter Module
CB
Main Smoothing Capacitor
CY1, CY2
Capacitor
Diode Bridge
Noise Filter Circuit Board
Connection Terminal<L-Phase>
Connection Terminal<Ground>
52C Relay
N.F.
LI / LO
Connection Terminal<N-Phase>
NI / NO
EI, E2
Controller Circuit Board
C.B.
DS2, DS3
52C
Power Module
IPM
SYMBOL NAME
[LEGEND]
SYMBOL NAME SYMBOL NAME
Connection Terminal<DC Voltage>
TABP1/P2/P
Connection Terminal<DC Voltage>
TABN1/N2/N
Switch<Forced Defrost, Defect History Record
Reset, Refrigerant Address>
Switch<Test Operation>
Switch<Function Switch>
SW1
SW4
SW5
Switch<Function Setup>
Switch<Model Select>
SW7
SW6
Switch<Function Setup>
SW8
Switch
SW9
Switch<Pump Down>
SWP
Connector<Emergency Operation>
CN31
LED1,LED2
F1~F4
LED<Operation Inspection Indicators>
CNM
CNMNT
CNVMNT
CNDM
Connector<A-Control Service Inspection Kit>
Connector
<Connected to Optional M-NET Adapter Board>
Connector
<Connected to Optional M-NET Adapter Board>
Connector < Connected for Option (Contact Input)>
Fuse<T6.3AL250V
>
X51,X52,X55
Relay
SS
Connector<Connection for Option>
SYMBOL
M-NET ADAPTER
NAME
TB7
CN5
CND
CN2M
SW1
SW11
SW12
LED1
LED2
LED3
LED4
LED5
Terminal Block<M-net connection>
Connector<Transmission>
Connector<Power Supply>
Connector<M-NET communication>
Switch<Status of communication>
Switch<Address setting : 1s digit>
Switch<Address setting : 10s digit>
LED<Power Supply : DC5V>
LED<Connection to Outdoor Unit>
LED<Transmission : Sending>
LED<Transmission : Recelving>
LED<Power Supply : DC12V>
CN5
(WHT)
3 1
LED2
SW1
SW11
SW12
LED3
LED4
TB7
LED1
LED5
2
1
CND
(WHT)
CN2M
(WHT)
M-NET ADAPTER
M-NET
A B S
When M-NET adapter is connected
CNVMNT
(WHT)
31
CNDM
(WHT)
CN51
(WHT)
1
3
1
5
CNMNT
(WHT)
CNM
(WHT)
51
LEV-A
(WHT)
LEV-A
C. B.
LEV-B
(RED)
LEV-B
6
3
5
5
1
TH7/6
(RED)
63H
(YLW)
TRANS
X55
X51
TH3
(WHT
)
CNDC
(PNK)
CNF1
(WHT)
CNF2
(WHT)
TH4
(WHT
)
TH7 TH6 TH3 TH4
41 21
TH32
(BLK
)
TH32
2
t
°
1 2 1
SW7
SW6SW1
SW9
CN31
141
MF1
MF2
MS
3~
M M
MS
3~
7
1
CN2
(WHT)
CNS
(WHT)
CNAC
(WHT)
CN4
(WHT)
SV2
(BLU)
SS
(WHT)
21S4
(GRN)
2 1
LED1
LED2
X52
F1
F2
F4
F3
+1+
1
21
43
SW5SW8SW4 SWP
IPM
MS
3~
UVW
21S4
61
31
7
1
3
1
2
3 1
71
LEV-C
(BLU)
6
1
7
2
TH33
(YLW
)
TH33
3
t
°
1
t°t°t°t
°
13 13 13
CN52C
(RED)
221
TABN
TABP
CN3
(WHT)
CNAF
(WHT)
CN2
(WHT)
CN4
(WHT)
CN5
(RED)
TH8
CB
1
4
1
7
7
1
2
1
2
1
2
2
2
3
2
6
RED
RED
TABP2
WHT
WHT
t
°
P. B.
CNDC
(PNK)
TABU
TABV
TABW
BLK
WHT
DS2
DS3
U
TABT
TABS
TABP1
TABN1
BLK
1
TABN2
WHT
WHT
BLU
BLU
RED
U
CY1
CY2
LI NI
LO NO
EI
E2
U
POWER SUPPLY
208/230V 60Hz
INDOOR
UNIT
TB1
L1 L2 GR S1 S2 S3
N. F.
MC
1
2
2
3
1
3
1
1
2
2
CN5
(RED)
RED
RED
CNAC1
(WHT)
CNAC2
(RED)
CN52C
(BLK)
52C
BLU
DCL
ACTM
L1
L2
N2
N1
P
Io
RED
BLK
RED
WHT
WHT
BLK
61
4
BLU
YLW
GRN
ORN
BRN
63H
63L
(RED)
31
63L
LEV-C
M
5
3
5
1
RED
5
+
Use copper supply wires.
BLK
BLK
1 2 3 4 5 6 7 8
OFF
ON
36N
OFF
ON
1 2 3 4 5 6
CN51
Connector < Connected for Option (Signal output)>
PUZ-HA30NHA4 PUZ-HA36NHA4
WIRING DIAGRAM
11
8
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
Outdoor unit power supply
Wiring circuit breaker or isolating switch
Outdoor unit
Indoor unit/outdoor unit connecting cords
Remote controller
Indoor unit
Indoor unit earth
S1
S2
L1
L2
GR
1
2
S1
S2
S3
S3
S1
S2
L1
L2
GR
1
2
S1
S2
S3
1
2
S1
S2
S3
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
– –
Indoor unit power supply
Minimum circuit ampacity
Maximum rating of overcurrent protective device
*1. Max. 45 m, 147 ft
If AWG13 used, Max. 50m, 164ft
If AWG13 used and S3 separated, Max. 80m, 262ft
*2. The 10 m, 30 ft wire is attached in the remote controller accessory. Max 1500 ft
*3. The figures are NOT always against the ground.
S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulataed 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 % Min. AWG 10
1 % Min. AWG 10
3 % AWG 16 (polar)
1 % Min. AWG 16
2% AWG 22 (Non-polar)
AC 208/230 V
AC 208/230 V
DC 24 V
DC 12 V
Wir
ing
Wire No
. %
size
Circuit
rating
S1
S2
S3
S1
S2
S3
A-Control
Outdoor Unit
3 poles isolator
208/230V
Single phase
Isolator
A-Control
Indoor Unit
*4
• Turn on the main power when the ambient temperature is -20 °C, -4 °F or higher.
• In below -20 °C, -4 °F condition, it needs at least 4 hr standby to operate in order to warm the electrical parts.
WIRING SPECIFICATIONS
12 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
L1
L2
GR
GR
1
2
L1
L2
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 refering 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. Max. 50 m, 165 ft
*2. The 10 m, 30 ft wire is attached in the remote controller accessory. Max. 500 m, 1500 ft
*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 300V 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 % Min. AWG16 2 % Min. AWG16
1 % Min. AWG16 1 % Min. AWG16
2 % AWG22 (polar) 2 % AWG22 (polar)
2 % AWG22 (Non-polar) 2 % AWG22 (Non-polar)
AC 208/230 V AC 208/230 V
DC24 V DC24 V
DC12 V DC12 V
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
* 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
L1
GR
L2
1
2
L1
L2
GR GR
S1
S2
S3
1
2
L1
L2
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.
%
size
– –
– –
Option
Option
CN01
Indoor unit earth
15
8-3. INDOOR – OUTDOOR CONNECTING CABLE
+ The Max. cable length may vary depending on the condition of installation, humidity or materials, etc.
Indoor unit-Outdoor unit
Outdoor power supply
Max. 45m, 147ft
3 % AWG15(polar)
Max. 50m, 164ft
3 % AWG13(polar)
Max. 80m, 262ft
3 % AWG13(polar) and S3 separated
Wire No. % 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. 120m, 393ft
2 % Min. AWG22
Wire No. % Size
+ The optional indoor power supply terminal kit is necessary.
Group
remote
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 for
transmission
wire
Central
remote
controller
M-NET transmission wire
×
Bad example (Multi spot grounding of shield wire)
Good example 1 (Single spot grounding of shield wire)
Power
supply
appliance
M-NET type
outdoor unit
Central
remote
controller
Power
supply
appliance
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
Central
remote
controller
Power
supply
appliance
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)
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 208/230V power supply. If it is connected,
electronic parts on M-NET P.C. board may be burnt out.
(3) Use 2-core x 1.25mm2 [AWG16] 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 would be ok 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.
14
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
System
controller
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 for
transmission
wire
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
System
controller
Power
supply
unit for
transmission
wire
M-NET wiring
Transmission
wire
Shield
part
M-NET
terminal
block
Ground
wire
A B S
●
2
(1) Use 2-core x 1.25mm
[AWG16] 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.
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 -6 on the outdoor controller board. [Initial setting: all
switches are OFF. (All refrigerant addresses are “00”.)]
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.
w Refrigerant addresses can be overlapped if they are in the different group.
w 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”.
15
17
9
Distributor
Thermistor TH7
(Outdoor)
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
(Outdoor
2-phase pipe)
Thermistor TH3
(Outdoor pipe)
Charge plug
(Low pressure)
Charge plug
(High pressure)
Heat inter change circuit
Thermistor TH4
(Discharge)
Compressor
Injection port
Strainer
#50
Solenoid valve
(Four-way valve)
Strainer
#100
Strainer
#100
Strainer
#100
Strainer
#100
Muffler
Ball valve
Thermistor TH33
(Outdoor pipe)
Thermistor
TH32
(Outdoor pipe)
Low pressure
switch 63L
High pressure
switch 63H
Refrigerant flow in cooling
Refrigerant flow in heating
REFRIGERANT SYSTEM DIAGRAM
PUZ-HA30NHA4 PUZ-HA36NHA4 unit : mm (inch)
Refrigerant recovering (pump down)
Perform the following procedures to recover the refrigerant when moving the indoor unit or the outdoor unit.
1
Turn on the power supply (circuit breaker).
wWhen power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If
“CENTRALLY CONTROLLED” is displayed, the refrigerant recovering (pump down) cannot be completed normally.
2
After the liquid stop valve is closed, set the SWP switch on the control board of the outdoor unit to ON. The compressor
(outdoor unit) and ventilators (indoor and outdoor units) start operating and refrigerant collecting operation begins. LED1
and LED2 on the control board of the outdoor unit are lit.
wSet the SWP switch (push-button type) to ON in order to perform refrigerant recovering operation only when the unit
is stopped. However, refrigerant recovering operation cannot be performed until compressor stops even if the unit is
stopped. Wait 3 minutes until compressor stops and set the SWP switch to ON again.
3Because the unit automatically stops in about 2 to 3 minutes after the refrigerant collecting operation (LED1 is not lit and
LED2 is lit), be sure to quickly close the gas stop valve.
wIn case the outdoor unit is stopped when LED1 is lit and LED2 is not lit, open the liquid stop valve completely, and then
repeat step 2 3 minutes later.
4
wIf the refrigerant collecting operation has been completed normally (LED1 is not lit and LED2 is lit), the unit will remain
stopped until the power supply is turned off.
Turn off the power supply (circuit breaker).
16
10 TROUBLESHOOTING
Unit conditions at service
Error 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
Consider the temporary defects such as the work of
protection devices in the refrigerant circuit including
compressor, poor connection of wiring, noise and etc.
Re-check the symptom, and check the installation
environment, refrigerant amount, when the trouble
occurred, matters related to wiring and etc.
Reset error code logs and restart the unit after finishing
service.
There is no abnormality concerning of parts such as
electrical component, controller board, remote controller
and etc.
Re-check the abnormal symptom.
Conduct trouble shooting and ascertain the cause of the
trouble according to “10-5. Troubleshooting
by inferior
phenomena”.
Continue to operate unit for the time being if the cause
is not ascertained.
There is no abnormality concerning of parts such as
electrical component, controller board, remote controller
and etc.
10-1. TROUBLESHOOTING
<Error code display by self-diagnosis and actions to be taken for service (summary)>
Present and past error codes are logged and 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 at service, are summarized in the
table below. Check the contents below before investigating details.
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 500V Megger
and check that it is 1.0M" or over.
wDo not use 500V 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.)
17
19
[TEST] button
Pipe (liquid) temperature
Displays the remaining
test run time.
"TEST RUN" and the currently selected
operation mode are displayed altemately.
F
• In case of test run, the OFF timer will be activated, and the test run will automatically stop after 2 hours.
Remote Controller Display
Symptoms in test run mode
OUTDOOR BOARD LED Display
Cause
Remote controller displays “PLEASE
WAIT”, and
cannot be operated.
After power is turned on, “PLEASE WAIT”
is displayed for 3 minutes, then error code
is displayed.
No display appears even when remote
controller operation switch is turned on.
(Operation lamp does not light up.)
Display appears but soon disappears
even when remote controller is operated.
• After power is turned on, “PLEASE WAIT” is displayed for 2
minutes during
system startup. (Normal)
• Incorrect connection of outdoor terminal block (L1, L2, and
S1, S2, S3.)
• Outdoor unit’s protection device connector is open.
• Incorrect wiring between the indoor and outdoor unit (Polarity
is wrong for S1, S2, S3.)
• Remote controller transmission wire short
• There is no outdoor unit of address 0.
(Address is other than 0.)
• Remote controller transmission wire open
• After canceling function selection, operation is not possible for
about 30 seconds. (Normal)
After “startup” is displayed, only
green lights up. <00>
After “startup” is displayed,
green (once) and red (once)
blink alternately. <F1>
After “startup” is displayed,
green (once) and red (twice)
blink alternately. <F3, F5, F9>
After “startup” is displayed,
green (twice) and red (once)
blink alternately. <EA. Eb>
After “startup” is displayed, only
green lights up. <00>
After “startup” is displayed, only
green lights up. <00>
< > indicates digital display.
2. Press TEST button twice.
1. Turn on the main power supply.
3. Press OPERATION SWITCH
button.
4. Press AIR DIRECTION button.
5. Check the outdoor unit fan for
correct running.
6. Press the ON/OFF button to reset the test run in progress.
7. Register the contact number.
While the room temperature display on the remote
controller is “PLEASE WAIT”, the remote controller is disabled.
Wait until “PLEASE WAIT” disappears before using remote controller.
“PLEASE WAIT” appears for about 2 minutes after power
supply is turned on. +1
The outdoor unit features automatic capacity control to
provide optimum fan speeds. Therefore, the fan keeps
running at a low speed to meet the current outside air
condition unless it exceeds its available maximum power.
Then, in actuality, the fan may stop or run in the reverse
direction depending on the outside air, but this does not
mean malfunction.
Check for correct motion of auto-vanes.
Cooling mode:
Check if cool air blows and water is drained.
Heating mode: Check if warm air blows. (It takes a little
while until warm air blows.)
The TEST RUN appears on the screen.
Operating procedures
LCD
Contents of inferior phenomena
P1
P2
P4
P5
P6
P8
P9
Fb
Abnormality of room temperature thermistor
Abnormality of pipe temperature thermistor/Liquid
Abnormality of drain sensor/Float switch connector open
Drain overflow protection is working.
Freezing/overheating protection is working.
Abnormality of pipe temperature
Abnormality of pipe temperature thermistor/Cond./Eva
Abnormality of indoor controller board
LCD
Contents of inferior phenomena
U1~UP
F3~F9
E0~E5
E6~EF
----
FFFF
PA
Malfunction outdoor unit
Malfunction
outdoor unit
Remote controller transmitting error
Indoor/outdoor unit communication error
No error history
No applied unit
Forced compressor stop(due to water leakage abnormality)
LED1
(microcomputer power supply)
LED2
(remote controller)
LED3
(indoor/outdoor communication)
Lits when power is supplied.
Lits when power is supplied for wired remote controller.
The indoor unit should be connected to the outdoor unit with address “0” setting.
Blinks when indoor and outdoor unit are communicating.
• The room temperature display section shows the pipe temperature of indoor units during the test run.
• Check that all the indoor units are running properly in case of simultaneous twin operation. Malfunctions may not be displayed regardless of incorrect wiring.
w1 After turning on the power supply, the system will go into startup mode, “PLEASE WAIT” will blink on the display section of
the room temperature, and lamp(green) of the remote controller will blink.
As to INDOOR BOARD LED, LED1 will be lit up, LED2 will either be lit up in case the address is 0 or turned off in case the
address is not 0. LED3 will blink.
As to OUTDOOR BOARD LED, LED1(green) and LED2(red) will be lit up. (After the startup mode of the system finishes,
LED2(red) will be turned off.)
In case OUTDOOR BOARD LED is digital display, and will be displayed alternately every second.
• If one of the above operations doesn’t function correctly, the causes written below should be considered. Find causes from
the symptoms.
The below symptoms are under test run mode. “startup” in the table means the display status of w1 written above.
w Press the remote controller’s
CHECK
button twice to perform self-diagnosis. See the table below for the contents of LCD
display.
See the table below for details of the LED display (LED 1, 2, 3) on the indoor controller board.
18
ON/OFF
TEMP
FAN
VANE
MODE
CHECK
LOUVER
TEST RUN
AUTO STOP
AUTO START
h
min
RESET
SET
CLOCK
TEST
RUN
COOL
,
Test run [for IR wireless remote controller]
TEST RUN
TEST RUN
MODE
COOL
MODE
HEAT
FAN
VANE
OFF
1 2
ON
<SW4>
Stop Operation
Cooling Heating
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.
2 Press the
(Start this operation from the turned off status of remote controller
display.)
and current operation mode are displayed.
3 Press the
check whether cool air is blown out from the unit.
4 Press the
check whether warm air is blown out from the unit.
5 Press the
from the unit.
6 Press the
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.
button twice continuously.
( ) button to activate
( ) button to activate
mode, then
mode, then
button and check whether strong air is blown out
button and check whether the auto vane operates
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,
but this is no 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 compressor starts operating. But 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.)
19
21
10-3. HOW TO PROCEED "SELF-DIAGNOSIS"
10-3-1. When a Problem Occurs During Operation
ON/OFF
When using remote-/local-controller combined operation, cancel the error code after turning off remote operation. During
central control by a MELANS controller, cancel the error code by pressing the
ON/OFF
button.
10-3-2. Self-Diagnosis During Maintenance or Service
Since each unit has a function that stores error codes, the latest check code can be recalled even if it is cancelled by the remote
controller or power is turned off.
Check the error code history for each unit using the remote controller.
Switch to self-diagnosis mode.
Press the
CHECK
button twice within 3 seconds. The display content
will change as shown below.
Set the unit number or refrigerant address you want to diagnose.
Press the [TEMP] buttons ( and ) to select the desired number
or address. The number (address) changes between [01] and [50] or [00]
Display self-diagnosis results.
<When there is error code history>
(For the definition of each error code, refer to the indoor unit's installation manual or service handbook.)
Reset the error history.
Display the error history in the diagnosis result display screen (see step ).
Error code (2 or 4 digits)
(Alternating Display)
Address (3 digits) or unit number (2 digits)
The refrigerant address will begin to blink
approximately 3 seconds after being
selected and the self-diagnosis process will begin.
Unit number or refrigerant address
to be diagnosed
Error code (2 or 4 digits)
(Alternating Display)
Address (3 digits) or unit number (2 digits)
<When there is no error code history> <When there is no corresponding unit>
and
[15].
If a problem occurs in the air conditioner, the indoor and outdoor units will
stop, and the problem is shown in the remote controller display.
[CHECK] and the refrigerant address are displayed on the temperature
display, and the error code and unit number are displayed alternately as
shown below. (If the outdoor unit is malfunctioning, the unit number will
be "00".)
In case of group control, for which remote controller controls multiple
refrigerant systems, the refrigerant address and error code of the unit
that first experienced trouble (i.e., the unit that transmitted the error
code) will be displayed.
To clear the error code, press the button.
20
Transmission data from remote controller
Transmission data on transmission path
When the number of data errors is "02":
Press the
ON/OFF
button twice within 3 seconds. The self-diagnosis
address or refrigerant address will blink.
When the error history is reset, the display will look like the one shown below.
However, if you fail to reset the error history, the error content will be displayed again.
Cancel self-diagnosis.
Self-diagnosis can be cancelled by the following 2 methods.
Press the
CHECK
button twice within 3 seconds. → Self-diagnosis will be cancelled and the screen will return to the previous state in effect before the start
of self-diagnosis.
Press the
ON/OFF
button. → Self-diagnosis will be cancelled and the indoor unit will stop.
10-3-3. Remote Controller Diagnosis
If the air conditioner cannot be operated from the remote controller, diagnose the remote controller as explained below.
First, check that the power-on indicator is lit.
If the correct voltage (DC12 V) is not supplied to the remote controller, the
indicator will not light.
If this occurs, check the remote controller's wiring and the indoor unit.
Switch to the remote controller self-diagnosis mode.
Press the
CHECK
button for 5 seconds or more. The display content will
change as shown below.
Press the
FILTER
button to start self-diagnosis.
Remote controller self-diagnosis result
[When the remote controller is functioning correctly]
Check for other possible causes, as there is no problem with the remote
controller.
[When the remote controller malfunctions]
(Error display 1) "NG" blinks. → The remote controller's transmitting-receiv-
ing circuit is defective.
The remote controller must be replaced with a new one.
[Where the remote controller is not defective, but cannot be operated.]
(Error display 2) [E3], [6833] or [6832] blinks. → Transmission is not possible.
There might be noise or interference on the transmission path, or the indoor unit
or other remote controllers are defective. Check the transmission path and other
controllers.
(Error display 3)
"ERC" and the number of data errors are displayed.
→ Data error has occurred.
The number of data errors is the difference between the number of bits sent from
the remote controller and the number actually transmitted through the transmission path. If such a problem is occurring, the transmitted data is affected by noise,
etc. Check the transmission path.
To cancel remote controller diagnosis
Press the
CHECK
button for 5 seconds or more. Remote controller diagnosis will be cancelled, "PLEASE WAIT" and operation lamp will blink. After
approximately 30 seconds, the state in effect before the diagnosis will be restored.
Power on indicator
21
23
10-3-4. Malfunction-diagnosis method by IR wireless remote controller
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
<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]
1. Press the CHECK button twice.
• "CHECK" lights, and refrigerant
address "00" blinks.
• Check that the remote controller's
display has stopped before continuing.
2. Press the temperature
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.
• 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 error code is output.
(It takes 3 seconds at most for error
code to appear.)
• The check mode is cancelled.
22
[Output pattern A] Errors detected by indoor unit
[Output pattern B]
E9
*1If 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.
*2If the beeper sounds 3 times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” 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 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.On0.5 sec.On0.5 sec.
Off
Approx. 2.5 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.
· · · 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 sec.On0.5 sec.On0.5 sec.On0.5 sec.
On
0.5 sec.
Off
Approx. 2.5 sec.On0.5 sec.On0.5 sec.
· · · 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]
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 heatsink
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
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 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 Fb
Indoor unit control system error (memory error, etc.)
–
E0, E3
– E1, E2
Remote controller control board error
Remote controller transmission error
As for indoor
unit, refer to
indoor unit's
service manual.
23
25
10-4. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is turned on> (Note 1) Refer to indoor unit section for code P and code E.
Error Code Abnormal point and detection method Case
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
None
—
(CNDC)
4 Disconnection of reactor (DCL)
Judgment and action
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.
3 Check connection of the connector (CNDC)
on the outdoor controller circuit board.
Check
4 Check connection of reactor. (DCL)
connection of the connector, CNDC,
on the outdoor power circuit board. Refer to
10-9.
Check connection of “L1” and “L2” on the
active filter module.(ACTM)
Refer to 10-9.
F3
(5202)
63L connector open
Abnormal if 63L connector circuit is open
for 3 minutes continuously after power supply.
63L: Low-pressure switch
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 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
5 a) Check connection of outdoor noise filter
circuit board.
b) Replace outdoor noise filter circuit board.
Refer to 10-9.
6 Replace outdoor power circuit board.
7 Replace controller board (When items
above are checked but the units cannot be
repaired).
1 Check connection of 63L connector on
outdoor controller circuit board.
Refer to 10-9.
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.
24
Error Code Abnormal point and detection method Judgment and action
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
Case
1 Check connection of 63H connector on
outdoor controller circuit board.
Refer to 10-9.
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)
EA
(6844)
Eb
(6845)
EC
(6846)
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
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 and 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”.
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.
Start-up time over
The unit cannot finish start-up process
within 4 minutes after power on.
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 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.
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.
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 Check connection of connector(63H,63L) on
outdoor controller circuit board.
Refer to 10-9.
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.
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: 80m
(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.
w The descriptions above 1-8 are for EA, Eb
and EC.
25
27
<Abnormalities detected while unit is operating>
<Abnormalities detected while unit is operating>
Error Code
U1
(1302)
Abnormal point and detection method Judgment and action
High pressure (High-pressure switch
63H worked)
Abnormal if high-pressure switch 63H
worked ( w ) during compressor operation.
w 4.15 MPa [602PSIG]
63H: High-pressure switch
Case
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.)
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.
8 Replace outdoor controller board.
U2
(1102)
High discharging temperature
(1) Abnormal if discharge temperature
thermistor (TH4) exceeds 125
[257˚F] or 110: [230˚F] continuously
for 5 minutes.
Abnormal if condenser/evaporator
temperature thermistor (TH5) exceeds
: [104˚F] during defrosting and
40
discharge temperature thermistor (TH4)
exceeds 110: [230˚F].
(2) Abnormal if discharge superheat
(Cooling: TH4 – TH5 / Heating: TH4 –
TH6) exceeds 70degC [126degF].
:
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.
wClogging occurs in the parts
which become below freezing
point when water enters in the
refrigerant circuit.
26
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 “Judgement
and action” for U3.
5 Check linear expansion valve.
Refer to 10-6.
6 After recovering refrigerant, remove water
from entire refrigerant circuit under vacuum
more than 1 hour.
Thermistors
Open detection Short detection
Symbol Name
TH3,TH32,TH33
TH6
TH7
TH8
– 40[-40°F] or below
– 40[-40°F] or below
– 40[-40°F] or below
– 27[-17°F] or below
90[194°F] or above
90[194°F] or above
90[194°F] or above
102[216°F] or above
Thermistor <Outdoor pipe>
Thermistor <Outdoor 2-phase pipe>
Thermistor <Outdoor>
Thermistor <Heatsink>
Error Code Abnormal point and detection method Case Judgment and action
U3
(5104)
U4,
TH32, TH33
(TH3:5105)
(TH6:5107)
(TH7:5106)
(TH8:5110)
Open/short circuit of discharge
temperature thermistor (TH4)
Abnormal if open (3: [37˚F] or less) or
short (217: [422˚F] 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.)
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.
WCheck which unit has abnormality in its
thermistor by switching the mode of SW2.
(PAC-SK52ST) (Refer to 11-10.)
1 Disconnection or contact failure
of connector (TH4) on the out
door controller circuit board
2 Defective thermistor
3 Defective outdoor controller cir-
cuit 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
1 Check connection of connector (TH4) on the
outdoor controller circuit board.
Check breaking of the lead wire for thermis-
tor (TH4). Refer to 10-9.
2 Check resistance value of thermistor (TH4)
or temperature by microcomputer.
(Thermistor/TH4: Refer to 10-6.)
(SW2 on A-Control Service Tool: Refer to 10-10.)
3 Replace outdoor controller board.
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 thermis
tor (TH3,TH32,TH33,TH6,TH7,TH8). Refer
to 10-9.
2 Check resistance value of thermistor (TH3,T
H32,TH33,TH6,TH7,TH8) or check tempera
ture by microcomputer.
(Thermistor/TH3,TH6,TH7,TH8: Refer to 10-6.)
(SW2 on A-Control Service Tool: Refer to 10-10.)
3 Replace outdoor controller circuit board.
WEmergency operation is available in case of
abnormalities of TH3,TH32,TH33,TH6 and
TH7. Refer to 10-8.
-
-
Temperature of heatsink
Abnormal if heat sink thermistor(TH8)
detects temperature indicated below.
HA30, 36 ······························ 84:, 183˚F
U5
(4230)
Power module
Check abnormality by driving power module in case overcurrent is detected.
U6
(4250)
U7
(1520)
(UF or UP error condition)
Too low superheat due to low discharge
temperature
Abnormal if discharge superheat is continuously detected less than or equal to
-15˚C[5˚F] for 3 minutes even though linear expansion valve has minimum open
pulse after compressor starts operating for
10 minutes.
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 circuit
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 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
27
12 Check outdoor fan.
3 Check air flow path for cooling.
4 Check if there is something which causes
temperature rise around outdoor unit.
(Upper limit of ambient temperature is 46:
[114˚F].)
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.)
(SW2 on A-Control Service Tool: Refer to
10-10.)
6 Replace outdoor power circuit board.
7 Replace outdoor controller 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 (Outdoor power circuit
board).
4 Check compressor referring to 10-6.
5 Replace outdoor power circuit board.
12 Check the installation conditions of dis-
charge temperature thermistor (TH4).
3 Check the coil of linear expansion valve.
Refer to 10-7.
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.
29
Error 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 20: [68˚F] 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)
UF
(4100)
Overvoltage or voltage shortage and
synchronous signal to main circuit
Abnormal if any of followings are detected
during compressor operation;
• Decrease of DC bus voltage to 310V
• Instantaneous decrease of DC bus voltage to 200V
• Increase of DC bus voltage to 400V
• Decrease of input current of outdoor unit
to 0.5A only if operation frequency is
more than or equal to 40Hz or compres
sor current is more than or equal to 5A.
Compressor overcurrent interruption
(When compressor locked)
Abnormal if overcurrent of DC bus or
compressor is detected within 30 seconds
after compressor starts operating.
1 Decrease of power supply volt-
age
2 Disconnection of compressor
wiring
3 Defective noise filter circuit
board
4 Disconnection or loose connec-
tion of CN52C
5 Defective ACT module
6 Defective ACT module drive
-
circuit of outdoor power circuit
board
7 Disconnection or loose connec-
tion of CNAF
8 Defective 52C drive circuit of
noise filter circuit board
9 Disconnection or loose con-
nection of CN5 on the outdoor
power circuit board
0 Disconnection or loose con-
nection of CN2 on the outdoor
power circuit board
1 Stop valve is closed.
2 Decrease of power supply volt-
age
3 Looseness, disconnection or
converse of compressor wiring
connection
4 Defective compressor
5 Defective outdoor power board
1 Check the facility of power supply.
2 Correct the wiring (U·V·W phase) to com-
pressor. Refer to 10-9 (Outdoor power circuit
board).
3 Replace noise filter circuit board.
4 Check CN52C wiring.
5 Replace ACT module.
6 Replace outdoor power circuit board.
7 Check CNAF wiring.
8 Replace noise filter circuit board.
9 Check CN5 wiring on the outdoor power cir-
cuit board. Refer to 10-9.
0 Check CN2 wiring on the outdoor power cir-
cuit board. Refer to 10-9.
1 Open stop valve.
2 Check facility of power supply.
3Correct the wiring (U·V·W phase) to compres-
sor.
Refer to 10-9 (Outdoor power circuit board).
4 Check compressor. Refer to 10-6.
5 Replace outdoor power circuit board.
UH
(5300)
Ud
(1504)
Current sensor error
• Abnormal if current sensor detects –1.5A
to 1.5A during compressor operation. (This
error is ignored in case of test run mode.)
Overheat protection
Abnormal if outdoor pipe thermistor (TH3)
detects 70:[158˚F] or more during compressor operation.
1 Disconnection of compressor
wiring
2 Defective circuit of current sen-
sor on outdoor power circuit
board
1 Defective outdoor fan (fan
motor) or short cycle of outdoor unit during coling operation
2 Defective outdoor pipe ther-
mistor (TH3)
28
1 Correct the wiring (U·V·W phase) to compres-
sor. Refer to 10-9 (Outdoor power circuit
board).
2 Replace outdoor power circuit board.
1 Check outdoor unit air passage.
23 Turn the power off and on again to check
the error code. If U4 is displayed, follow the
U4 processing direction.
Error Code Abnormal point and detection method Judgment and action
Abnormal low pressure (63L worked)
Abnormal if 63L is worked (under
-0.03MPa[-4PSIG]) during compressor
operation.
63L: Low-pressure switch
UL
(1300)
1 Stop valve of outdoor unit is
closed during operation.
2 Disconnection or loose con-
nection of connector (63L) on
outdoor controller board
3 Disconnection or loose connec-
tion of 63L
4 Defective outdoor controller
board
5 Leakage or shortage of refriger-
ant
6 Malfunction of linear expansion
valve
Case
1 Check stop valve.
2~4 Turn the power off and on again to check
if F3 is displayed on restarting.
If F3 is displayed, follow the F3 process
ing direction.
5 Correct to proper amount of refrigerant.
6 Check linear expansion valve. Refer to 10-6.
-
UP
(4210)
E0
or
E4
Compressor overcurrent interruption
Abnormal if overcurrent DC bus or compressor is detected after compressor starts
operating for 30 seconds.
Remote controller transmission
error(E0)/signal receiving error(E4)
1 Abnormal if main or sub remote control-
ler cannot receive normally any transmission from indoor unit of refrigerant
address “0” for 3 minutes.
(Error code : E0)
2 Abnormal if sub-remote controller could
not receive any signal for 2 minutes.
(Error code: E0)
1 Abnormal if indoor controller board can
not receive any data normally from
remote controller board or from other
indoor controller board for 3 minutes.
(Error code: E4)
2 Indoor controller board cannot receive
any signal from remote controller for 2
minutes. (Error code: E4)
1 Stop valve of outdoor unit is
closed.
2 Decrease of power supply volt-
age
3 Looseness, disconnection or
converse of compressor wiring
connection
4 Defective fan of indoor/outdoor
units
5 Short cycle of indoor/outdoor
units
6 Defective input circuit of out-
door controller board
7 Defective compressor
1 Contact failure at transmission
wire of remote controller
2 All 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.
3 Miswiring of remote controller
4 Defective transmitting receiving
circuit of remote controller
5 Defective transmitting receiv-
ing circuit of indoor controller
board of refrigerant address “0”.
6 Noise has entered into the
transmission wire of remote
controller.
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 (Outdoor power circuit
board).
4 Check indoor/outdoor fan.
5 Solve short cycle.
6 Replace outdoor controller circuit board.
7 Check compressor. Refer to 10-6.
W Before the replacement of the outdoor con-
troller 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.
1 Check disconnection or looseness of indoor
unit or transmission wire of remote controller.
2 Set one of the remote controllers “main”.
If there is no problem with the action above.
3 Check wiring of remote controller.
• Total wiring length: max. 500m[1640ft]
(Do not use cable o 3 or more.)
• The number of connecting indoor units:
max.16 units
• The number of connecting remote controller: max. 2 units
When above 1~3 find no problem.
4 Diagnose remote controllers.
a) When “RC OK” is displayed, remote con-
trollers 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 00-06” is dis
played, noise may be causing abnormality.
* 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
Remote controller control board
1 Abnormal if data cannot be read nor-
mally from the nonvolatile memory of the
remote controller control board.
(Error code: E1)
2 Abnormal if the clock function of remote
controller cannot be operated normally.
(Error code: E2)
1 Defective remote controller 1 Replace remote controller.
29
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