Mitsubishi Electric PUHZ-P125 Service manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
July 2009
No.OCH415
REVISED EDITION-C
SERVICE MANUAL
R410A
Outdoor unit
[model names]
PUHZ-P100VHA2
PUHZ-P125VHA2
PUHZ-P140VHA2
PUHZ-P100VHA3
PUHZ-P125VHA3
PUHZ-P140VHA3
[Service Ref.]
PUHZ-P100VHA2.UK
PUHZ-P125VHA2.UK
PUHZ-P125VHA21.UK
PUHZ-P140VHA2.UK
PUHZ-P140VHA21.UK
PUHZ-P100VHA3.UK
PUHZ-P100VHA3R1.UK
PUHZ-P125VHA3.UK
PUHZ-P125VHA3R1.UK
PUHZ-P140VHA3.UK
PUHZ-P140VHA3R1.UK
Revision:
• PUHZ-P100/125/140
VHA3R1.UK are added in
REVISED EDITION-C.
• Some descriptions have
been modified.
• Please void OCH415
REVISED EDITION-B.
Note:
• RoHS compliant products
have <G> mark on the
spec name plate.
CONTENTS
1. TECHNICAL CHANGES................................. 2
2. REFERENCE MANUAL.................................. 2
3. SAFETY PRECAUTION..................................3
4. FEATURES......................................................6
5. SPECIFICATIONS........................................... 7
6. DATA............................................................... 8
7. OUTLINES AND DIMENSIONS.................... 11
8. WIRING DIAGRAM....................................... 15
9. WIRING SPECIFICATIONS.......................... 16
10. REFRIGERANT SYSTEM DIAGRAM...............21
11. TROUBLESHOOTING...................................23
12. FUNCTION SETTING.................................... 73
13. EASY MAINTENANCE FUNCTION.............. 80
14. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER...........83
15. DISASSEMBLY PROCEDURE..................... 93
PARTS CATALOG (OCB415)
PUHZ-P100VHA2.UK
PUHZ-P100VHA3.UK
1
TECHNICAL CHANGES
PUHZ-P100VHA3.UK
PUHZ-P125VHA3.UK
PUHZ-P140VHA3.UK
PUHZ-P100VHA3R1.UK
PUHZ-P125VHA3R1.UK
PUHZ-P140VHA3R1.UK
• Fan grille has been changed.
• Structural parts have been changed. (Munsell 5Y 7/1 → 3Y 7.8/1.1)
PUHZ-P100VHA2.UK
PUHZ-P125VHA21.UK
PUHZ-P140VHA21.UK
PUHZ-P100VHA3.UK
PUHZ-P125VHA3.UK
PUHZ-P140VHA3.UK
OUTDOOR CONTROLLER BOARD (C.B) has been changed.
(Corresponding to the additional combination between PKA-RP•HAL/KAL, PCA-RP•KA and PEAD-RP•JA(L))
* In case of UL error, the compressor may be damaged if the unit is restarted by remote controller.
To avoid the damage, unit has the system that is not able to be restarted unless the power is turned OFF once.
PUHZ-P125VHA2.UK
PUHZ-P140VHA2.UK
PUHZ-P125VHA21.UK
PUHZ-P140VHA21.UK
4-WAY VALVE and COIL (21S4) have been changed.
2
REFERENCE MANUAL
INDOOR UNIT’S SERVICE MANUAL
Service
Manual No.
Model name
Service Ref.
PLA-RP50/60/71/100/125/140BA
PLA-RP140BA2
PLA-RP50/60/71/100/125/140BA(#2).UK
PLA-RP50/60/71BA1.UK
PLA-RP140BA2R1.UK
PCA-RP50/60/71/100/125/140GA
PCA-RP50GA2
PCA-RP50/60/71/100/125/140GA(#1)
PCA-RP50GA2(#1)
PCA-RP71/125HA
PCA-RP71/125HA(#1)
PKA-RP50GAL
PKA-RP50GAL(#1)
PKA-RP60/71/100FAL
PKA-RP50FAL2
PKA-RP60/71/100FAL(#1)
PKA-RP50FAL2(#1)
PEAD-RP50/60/71/125/140EA
PEAD-RP100EA2
PEAD-RP50/60/71/125/140EA(#1).UK
PEAD-RP100EA2(#1).UK
PEAD-RP60/71/100GA
PEAD-RP60/71/100GA(#1).UK
PKA-RP60/71/100KAL
PKA-RP60/71/100KAL.TH
OCH452
OCB452
PKA-RP35/50HAL
PKA-RP35/50HAL
OCH453
OCB453
PCA-RP50/60/71/100/125/140KA
PCA-RP50/60/71/100/125/140KA
OCH454
OCB454
PEAD-RP35/50/60/71/100/125/140JA(L)
PEAD-RP35/50/60/71/100/125/140JA(L).UK
2
OCH412
OCB412
OC328
OC329
OC330
OC331
HWE0521
HWE0506
HWE08130
BWE08240
3
SAFETY PRECAUTION
3-1. CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilizing refrigerant R410A
Use new refrigerant pipes.
Do not use refrigerant other than R410A.
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.
If other refrigerant (R22 etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil etc.
Make sure that the inside and outside of refrigerant piping is clean and it has no contamination
such as sulfur hazardous for use, oxides, dirt,
shaving particles, etc.
In addition, use pipes with specified thickness.
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.
Contamination inside refrigerant piping can cause deterioration of refrigerant oil etc.
Gauge manifold
Charge hose
Gas leak detector
Torque wrench
Tools for R410A
Flare tool
Size adjustment gauge
Vacuum pump adaptor
Electronic refrigerant
charging scale
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.)
Handle tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of compressor.
If dirt, dust or moisture enters into refrigerant cycle, that can
cause deterioration of refrigerant oil or malfunction of compressor.
Use ester oil, ether oil or alkylbenzene oil (small
amount) as the refrigerant oil applied to flares
and flange connections.
Do not use a charging cylinder.
If large amount of mineral oil enters, that can cause deterioration of refrigerant oil etc.
If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
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.
[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
Unit
Gravimeter
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No.
1
Tool name
Specifications
Gauge manifold
· Only for R410A
· Use the existing fitting specifications. (UNF1/2)
· Use high-tension side pressure of 5.3MPa·G or over.
2
Charge hose
3
Electronic scale
· Only for R410A
· Use pressure performance of 5.09MPa·G or over.
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
8
Refrigerant recovery equipment
· Only for R410A
· Top of cylinder (Pink)
· Cylinder with syphon
4
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 0.7mm or below.)
Diagram below: Piping diameter and thickness
Thickness (mm)
Nominal
Outside
dimensions(inch) diameter (mm)
R410A
R22
0.8
0.8
6.35
1/4
0.8
0.8
9.52
3/8
0.8
0.8
12.70
1/2
1.0
1.0
15.88
5/8
—
1.0
19.05
3/4
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 airtightness and intensity, flare cutting dimension of copper pipe for R410A have been specified separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also
have 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
Dimension B
Flare cutting dimensions
Outside
Nominal
diameter
dimensions(inch)
6.35
1/4
9.52
3/8
12.70
1/2
15.88
5/8
19.05
3/4
(mm)
Dimension A ( +0
-0.4 )
R410A
R22
9.0
9.1
13.0
13.2
16.2
16.6
19.4
19.7
—
23.3
Flare nut dimensions
Outside
Nominal
diameter
dimensions(inch)
6.35
1/4
9.52
3/8
12.70
1/2
15.88
5/8
19.05
3/4
(mm)
Dimension B
R22
R410A
17.0
17.0
22.0
22.0
+36.0mm for
24.0
26.0
indoor unit
27.0
29.0 +
of RP100,
—
36.0
125 and 140
3Tools for R410A (The following table shows whether conventional tools can be used or not.)
R410A tools
Can R22 tools be used? Can R407C tools be used?
Tool exclusive for R410A
Tool exclusive for R410A
Tool for HFC refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Ester oil and alkylbenzene
Ester oil:
Alkylbenzene oil: minimum amount
oil (minimum amount)
Prevent compressor malfunction Tool exclusive for R410A
Safety charger
when charging refrigerant by
spraying liquid refrigerant
Prevent gas from blowing out Tool exclusive for R410A
Charge valve
when detaching charge hose
Vacuum drying and air
Tools for other refrigerants can
Vacuum pump
(Usable if equipped
(Usable if equipped
with adopter for reverwith adopter for reverpurge
be used if equipped with adopse flow)
se flow)
ter for reverse flow check
Flaring work of piping
Tools for other refrigerants
Flare tool
(Usable by adjusting
(Usable by adjusting
can be used by adjusting
flaring dimension)
flaring dimension)
flaring dimension
Bend the pipes
Tools for other refrigerants can be used
Bender
Tools for other refrigerants can be used
Cut the pipes
Pipe cutter
Tools for other refrigerants can be used
Welder and nitrogen gas cylinder Weld the pipes
Tools for other refrigerants can be used
Refrigerant charging scale Refrigerant charge
Vacuum gauge or thermis- Check the degree of vacuum. (Vacuum Tools for other refrigerants
valve prevents back flow of oil and refri- can be used
tor vacuum gauge and
gerant to thermistor vacuum gauge)
vacuum valve
Refrigerant charge
Charging cylinder
Tool exclusive for R410A
: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.)
: Tools for other refrigerants can be used under certain conditions.
: Tools for other refrigerants can be used.
Tools and materials
Gauge manifold
Charge hose
Gas leak detector
Refrigerant recovery equipment
Refrigerant cylinder
Applied oil
Use
Air purge, refrigerant charge and
Operation check
Gas leak check
Refrigerant recovery
Refrigerant charge
Apply to flared section
5
4
FEATURES
PUHZ-P125VHA2.UK
PUHZ-P140VHA2.UK
PUHZ-P125VHA21.UK
PUHZ-P140VHA21.UK
PUHZ-P125VHA3.UK
PUHZ-P140VHA3.UK
PUHZ-P100VHA2.UK
PUHZ-P100VHA3.UK
PUHZ-P125VHA3R1.UK
PUHZ-P140VHA3R1.UK
PUHZ-P100VHA3R1.UK
CHARGELESS SYSTEM
PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT.
(Max.30m (PUHZ-P125/P140))
The refrigerant circuit with LEV (Linear Expansion Valve) and Accumulator always control the optimal refrigerant
level regardless of the length (30m max. and 5m min.) of piping. The additional refrigerant charging work during
installation often causes problems. Heretofore it is completely eliminated. This unique system improves the quality
and reliability of the work done. It also helps to speed up the installation time.
6
5
SPECIFICATIONS
PUHZ-P100VHA2.UK
PUHZ-P100VHA3.UK
PUHZ-P100VHA3R1.UK
Service Ref.
OUTDOOR UNIT
Mode
Power supply (phase, cycle, voltage)
Running current
Max. current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
Crankcase heater
Heat exchanger
Fan
Fan(drive) % No.
Fan motor output
Airflow
Defrost method
Noise level
REFRIGERANT PIPING
Dimensions
Weight
Refrigerant
Charge
Oil (Model)
Pipe size O.D.
Connection method
Between the indoor &
outdoor unit
Single, 50Hz, 230V
kW
HP switch
Discharge thermo
dB
dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kg(lbs)
L
mm(in.)
mm(in.)
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
OUTDOOR UNIT
Mode
Power supply (phase, cycle, voltage)
Running current
Max. current
External finish
Refrigerant control
Compressor
Model
Motor output
Starter type
Protection devices
REFRIGERANT PIPING
Dimensions
Weight
Refrigerant
Charge
Oil (Model)
Pipe size O.D.
Connection method
Between the indoor &
outdoor unit
—
Plate fin coil
Propeller fan % 1
0.060
60(2120)
Reverse cycle
50
54
950(37-3/8)
330+30(13+1-3/16)
943(37-1/8)
75(165)
R410A
3.0(6.6)
0.87(FV50S)
9.52(3/8)
15.88(5/8)
Flared
Flared
Max. 30m
Max. 50m
kW
*/min(CFM)
Service Ref.
Crankcase heater
Heat exchanger
Fan
Fan(drive) % No.
Fan motor output
Airflow
Defrost method
Noise level
12.62
28
Munsell 5Y 7/1 / Munsell 3Y 7.8/1.1 (VHA3R1)
Linear Expansion Valve
Hermetic
TNB220FLHMT
2.9
Inverter
12.26
A
A
W
Cooling
Heating
W
D
H
A
A
kW
W
kW
*/min(CFM)
Cooling
Heating
W
D
H
Heating
Cooling
dB
dB
mm(in.)
mm(in.)
mm(in.)
kg(lbs)
kg(lbs)
L
mm(in.)
mm(in.)
Liquid
Gas
Indoor side
Outdoor side
Height difference
Piping length
PUHZ-P125VHA2.UK
PUHZ-P140VHA2.UK
PUHZ-P125VHA21.UK
PUHZ-P140VHA21.UK
PUHZ-P125VHA3.UK
PUHZ-P140VHA3.UK
PUHZ-P125VHA3R1.UK
PUHZ-P140VHA3R1.UK
Heating
Heating
Cooling
Cooling
Single 50Hz, 230V
21.31
16.74
22.48
17.37
29.5
28
Munsell 5Y 7/1 / Munsell 3Y 7.8/1.1 (VHA3R1)
Linear Expansion Valve
Hermetic
TNB306FPGM
3.9
3.4
Inverter
HP switch
Discharge thermo
30
Plate fin coil
Propeller fan % 2
0.060+0.060
100(3,530)
Reverse cycle
51
52
55
56
950(37-3/8)
330+30(13+1-3/16)
1,350(53-1/8)
99(218)
R410A
4.5(9.9)
0.87(FV50S)
9.52(3/8)
15.88(5/8)
Flared
Flared
Max. 30m
Max. 50m
7
6
DATA
6-1. REFILLING REFRIGERANT CHARGE (R410A : kg)
Service Ref.
PUHZ-P100VHA2.UK
PUHZ-P100VHA3.UK
PUHZ-P100VHA3R1.UK
PUHZ-P125VHA2.UK
PUHZ-P125VHA21.UK
PUHZ-P125VHA3.UK
PUHZ-P125VHA3R1.UK
PUHZ-P140VHA2.UK
PUHZ-P140VHA21.UK
PUHZ-P140VHA3.UK
PUHZ-P140VHA3R1.UK
10m
Piping length (one way)
30m
40m
20m
50m
Initial
charged
2.9
3.0
3.6
4.2
4.8
3.0
4.3
4.4
4.5
5.1
5.7
4.5
4.3
4.4
4.5
5.1
5.7
4.5
Longer pipe than 20 or 30m, additional
charge is required.
6-2. COMPRESSOR TECHNICAL DATA
(at 20˚C)
Unit
PUHZ-P100VHA2.UK
PUHZ-P100VHA3.UK
PUHZ-P100VHA3R1.UK
PUHZ-P125,140VHA2.UK
PUHZ-P125,140VHA21.UK
PUHZ-P125,140VHA3.UK
PUHZ-P125,140VHA3R1.UK
Compressor model
TNB220FLHMT
TNB306FPGM
U-V
0.88
0.53
U-W
0.88
0.53
W-V
0.88
0.53
Winding
Resistance
()
8
6-3. NOISE CRITERION CURVES
PUHZ-P100VHA2.UK
PUHZ-P100VHA3.UK
PUHZ-P100VHA3R1.UK
MICROPHONE
1m
UNIT
MODE SPL(dB)
COOLING
50
HEATING
54
LINE
1.5m
GROUND
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
125
NC-20
250
500
1000
2000
4000
8000
BAND CENTER FREQUENCIES, Hz
PUHZ-P125VHA2.UK
PUHZ-P125VHA21.UK
PUHZ-P125VHA3.UK
PUHZ-P125VHA3R1.UK
MODE SPL(dB)
COOLING
51
HEATING
55
LINE
PUHZ-P140VHA2.UK
PUHZ-P140VHA21.UK
PUHZ-P140VHA3.UK
PUHZ-P140VHA3R1.UK
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
10
LINE
90
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
125
NC-20
250
500
1000
2000
4000
8000
BAND CENTER FREQUENCIES, Hz
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
90
MODE SPL(dB)
COOLING
52
HEATING
56
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
10
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
63
125
NC-20
250
500
1000
2000
4000
BAND CENTER FREQUENCIES, Hz
9
8000
6-4. STANDARD OPERATION DATA
PLA-RP100BA
Representative matching
Electrical circuit
Total
Mode
Heating
Cooling
Heating
Cooling
Heating
Capacity
W
9,400
11,200
12,300
14,000
13,600
16,000
Input
kW
3.12
3.28
4.09
4.11
5.21
4.98
Indoor unit
PLA-RP100BA
PLA-RP125BA
PLA-RP140BA(2)
Phase , Hz
1 , 50
1 , 50
1 , 50
230
230
230
Volts
V
Input
kW
0.14
0.13
0.15
0.14
0.16
0.15
A
0.94
0.87
1.00
0.94
1.07
1.00
Amperes
Outdoor unit
Volts
PUHZ-P100VHA2
PUHZ-P100VHA3
PUHZ-P125VHA2
PUHZ-P125VHA3
PUHZ-P140VHA2
PUHZ-P140VHA3
1 , 50
1 , 50
1 , 50
230
230
230
V
Current
A
MPa
(.f/%)
MPa
(.f/%)
12.26
2.90
(29.6)
0.92
(9.4)
12.62
2.57
(26.2)
0.62
(6.3)
17.37
2.68
(27.3)
0.86
(8.8)
16.74
2.56
(26.1)
0.68
(6.9)
22.48
2.79
(28.5)
0.79
(8.1)
21.31
2.75
(28.1)
0.64
(6.5)
Discharge temperature
°C
72.7
75.5
67.8
64.5
72.7
70.8
Condensing temperature
°C
48.6
41.4
45.5
43.4
47.0
47.2
Suction temperature
°C
10.1
0.1
6.8
1.3
4.4
1.0
Ref. pipe length
m
5
5
5
5
5
5
D.B.
°C
27
20
27
20
27
20
W.B.
°C
19
15
19
15
19
15
D.B.
°C
14.8
43.4
13.6
44.2
12.9
48.0
D.B.
°C
35
7
35
7
35
7
W.B.
°C
24
6
24
6
24
6
SHF
0.74
—
0.71
—
0.71
—
BF
0.21
—
0.18
—
0.14
—
Discharge pressure
Refrigerant circuit
PLA-RP140BA(2)
Cooling
Phase , Hz
Outdoor Indoor side
side
PLA-RP125BA
Suction pressure
Intake air temperature
Discharge air temperature
Intake air temperature
The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is : 1(MPa)=10.2(kgf/cm²)
10
Ov
10
mm
Over10
Service space
mm
100
500
Over
Front piping hole
(Knockout)
92
W92
40
65
45
Power supply wiring hole
(2-W27Knockout)
19
92
75
55
Less than
Over100
65
45
92
W92
40
FOUNDATION
Rear piping hole
(Knockout)
Side Air Intake
Handle for moving
Handle for moving
Rear Air Intake
Piping and wiring connections
can be made from 4 directions:
front, right rear and below.
4 PIPING-WIRING DIRECTIONS
Power supply wiring hole
(2-W27Knockout)
Rear trunking hole
(Knockout)
<Foundation bolt height>
Please secure the unit firmly
with 4 foundation (M10) bolts.
(Bolts and washers must be
purchased locally.)
3 FOUNDATION BOLTS
Power supply wiring hole
(2-W27Knockout)
Right trunking hole
(Knockout)
40
W92
Right piping hole
(Knockout)
Piping Knockout Hole Details
Air Intake
Handle for moving
+1 ···Indication of STOP VALVE connection location.
···Refrigerant GAS pipe connction (FLARE)W15.88(5/8 inch)
···Refrigerant LIQUID pipe connection (FLARE)W 9.52(3/8 inch)
Example of Notes
er
Ov
er
Ov
Front trunking hole
(Knockout)
m
00m
r5
mm
10
e
er
55
27
Ov
FREE
500
2 SERVICE SPACE
73 63
Over
Dimensions of space needed
for service access are
shown in the below diagram.
55
27
63
23 27 92
73
30
1 FREE SPACE (Around the unit)
Handle for moving
Side Air Intake
943
The diagram below shows a
basic example.
Explantion of particular details is
given in the installation manuals etc.
73 63
23
30
322
220
175
145
145
145
Earth terminal
950
Air Discharge
Installation Feet
600
Rear Air Intake
42
Drain hole
(5-W33)
71
2
1
Handle for moving
Service panel
Terminal Connections
Left···Power supply wiring
Reight···Indoor/Outdoor wiring
2-12%36 oval holes
(Foundation Bolt M10)
66
175
2-U Shaped notched holes
(Foundfation Bolt M10)
Bottom piping hole
(Knockout)
Rear piping cover
Front piping cover
OUTDOOR UNIT
PUHZ-P100VHA2.UK
PUHZ-P100VHA3.UK
23
330
23
(19)
370
417
28
+1 443
30
473
219
81
45
56
53
71
670
11
+1 447
7
OUTLINES AND DIMENSIONS
Unit : mm(inch)
er
Ov
10
mm
10
Service space
Over
Example of Notes
Ov
er
O
mm
150
ver
500
Over
Front piping hole
(Knockout)
92
W92
65
Power supply wiring hole
(2-W27Knockout)
Front trunking hole 40
45
(Knockout)
19
92
75
Right piping hole
(Knockout)
Piping Knockout Hole Details
55
W92
Air intake
Handle for moving
+1 ···Indication of STOP VALVE connection location.
···Refrigerant GAS pipe connction (FLARE)W15.88(5/8 inch)
···Refrigerant LIQUID pipe connection (FLARE)W 9.52(3/8 inch)
10
mm
m
0m
100
er
55
27
Ov
FREE
Less than
40
65
45
Right trunking hole
(Knockout)
92
W92
40
FOUNDATION
Handle for moving
Handle for moving
Rear piping hole
(Knockout)
Rear trunking hole
(Knockout)
Side Air Intake
Rear Air Intake
Piping and wiring connections
can be made from 4 directions:
front, right, rear and below.
4 PIPING-WIRING DIRECTIONS
Power supply wiring hole
(2-W27Knockout)
<Foundation bolt height>
Please secure the unit firmly
with 4 foundation (M10) bolts.
(Bolts and washers must be
purchased locally.)
Power supply wiring hole
(2-W27Knockout)
Dimensions of space needed
for service access are
shown in the below diagram.
150
500
The diagram below shows a
basic example.
Explantion of particular details is
given in the installation manuals etc.
Over
Over
3 FOUNDATION BOLTS
330
Handle for moving
Side Air Intake
1350
30
322
220
175
145
145
145
Earth terminal
950
Air Discharge
Installation Feet
600
Rear Air Intake
42
Drain hole
(5-W33)
71
2
1
Handle for moving
Service panel
Terminal connection
Left···Power supply wiring
Right···Indoor/Outdoor wiring
2-12 x 36 Oval holes
(Foundation Bolt M10)
66
175
2-U Shaped notched holes
(Foundation Bolt M10)
417
2 SERVICE SPACE
71
635
371
(19)
45
56
370
53
28
Front piping cover
Rear piping cover
Bottom piping hole
(Knockout)
+1 443
1 FREE SPACE (Around the unit)
73 63
23
63
23 27 92
73
1076
30
23
219
30
73 63
23
55
27
+1 447
12
81
PUHZ-P125VHA2.UK
PUHZ-P140VHA2.UK
PUHZ-P125VHA21.UK
PUHZ-P140VHA21.UK
PUHZ-P125VHA3.UK
PUHZ-P140VHA3.UK
Unit : mm(inch)
FREE
over 100mm
Over10
Service space
Front piping hole
(Knockout)
Front trunking hole
(Knockout)
92
W92
40
65
45
Power supply wiring hole
(2-W27Knockout)
19
92
75
55
40
W92
Right piping hole
(Knockout)
Piping Knockout Hole Details
Air Intake
Handle for moving
+1 ···Indication of STOP VALVE connection location.
500
65
45
92
W92
40
Rear piping hole
(Knockout)
Side Air Intake
Handle for moving
Handle for moving
Rear Air Intake
Piping and wiring connections
can be made from 4 directions:
front, right rear and below.
4 PIPING-WIRING DIRECTIONS
Power supply wiring hole
(2-W27Knockout)
Rear trunking hole
(Knockout)
FOUNDATION
<Foundation bolt height>
Please secure the unit firmly
with 4 foundation (M10) bolts.
(Bolts and washers must be
purchased locally.)
3 FOUNDATION BOLTS
Less than
Power supply wiring hole
(2-W27Knockout)
Right trunking hole
(Knockout)
500
Over
···Refrigerant GAS pipe connction (FLARE)W15.88(5/8 inch)
···Refrigerant LIQUID pipe connection (FLARE)W 9.52(3/8 inch)
Example of Notes
over 500mm
over 10mm
73 63
over 10mm
Over
2 SERVICE SPACE
55
27
30
Dimensions of space needed
for service access are
shown in the below diagram.
Handle for moving
Side Air Intake
943
1 FREE SPACE (Around the unit)
73 63
23
63
23 27 92
73
Over100
55
27
330
30
23
322
220
175
145
145
145
Earth terminal
950
Air Discharge
Installation Feet
600
Rear Air Intake
42
Drain hole
(5-W33)
71
2
1
Handle for moving
Service panel
Terminal Connections
Left···Power supply wiring
Reight···Indoor/Outdoor wiring
2-12%36 oval holes
(Foundation Bolt M10)
66
175
2-U Shaped notched holes
(Foundfation Bolt M10)
28
+1 443
The diagram below shows a
basic example.
Explantion of particular details is
given in the installation manuals etc.
71
Bottom piping hole
(Knockout)
Rear piping cover
Front piping cover
670
30
473
219
81
45
56
53
(19)
370
417
+1 447
13
23
OUTDOOR UNIT
PUHZ-P100VHA3R1.UK
Unit : mm(inch)
10
er
10
mm
m
0m
15
er
Service space
10
Over
Example of Notes
Ov
Ov
500
Over
150
Front piping hole
(Knockout)
92
W92
65
Power supply wiring hole
(2-W27Knockout)
Front trunking hole 40
45
(Knockout)
19
92
75
Right piping hole
(Knockout)
Piping Knockout Hole Details
55
W92
Air intake
Handle for moving
+1 ···Indication of STOP VALVE connection location.
···Refrigerant GAS pipe connction (FLARE)W15.88(5/8 inch)
···Refrigerant LIQUID pipe connection (FLARE)W 9.52(3/8 inch)
mm
00
10
mm
er
Ov
er
Ov
FREE
Less than
40
65
45
Right trunking hole
(Knockout)
92
W92
40
FOUNDATION
Handle for moving
Handle for moving
Rear piping hole
(Knockout)
Rear trunking hole
(Knockout)
Side Air Intake
Rear Air Intake
Piping and wiring connections
can be made from 4 directions:
front, right, rear and below.
4 PIPING-WIRING DIRECTIONS
Power supply wiring hole
(2-W27Knockout)
<Foundation bolt height>
Please secure the unit firmly
with 4 foundation (M10) bolts.
(Bolts and washers must be
purchased locally.)
Power supply wiring hole
(2-W27Knockout)
Dimensions of space needed
for service access are
shown in the below diagram.
Over
500
The diagram below shows a
basic example.
Explantion of particular details is
given in the installation manuals etc.
55
27
63
23 27 92
73
30
73 63
Over
3 FOUNDATION BOLTS
330
Handle for moving
Side Air Intake
1350
30
322
220
175
145
145
145
Earth terminal
950
Air Discharge
Installation Feet
600
Rear Air Intake
42
Drain hole
(5-W33)
71
2
1
Handle for moving
Service panel
Terminal connection
Left···Power supply wiring
Right···Indoor/Outdoor wiring
2-12 x 36 Oval holes
(Foundation Bolt M10)
66
175
2-U Shaped notched holes
(Foundation Bolt M10)
417
2 SERVICE SPACE
71
635
371
(19)
45
56
370
53
28
Front piping cover
Rear piping cover
Bottom piping hole
(Knockout)
+1 443
1 FREE SPACE (Around the unit)
73 63
23
55
27
1076
30
23
219
81
+1 447
14
23
PUHZ-P125VHA3R1.UK
PUHZ-P140VHA3R1.UK
Unit : mm(inch)
8
WIRING DIAGRAM
PUHZ-P100VHA2.UK
PUHZ-P125VHA21.UK
PUHZ-P100VHA3.UK
PUHZ-P100VHA3R1.UK
SYMBOL
TB1
MC
MF1,MF2
21S4
SV
CH
63H
TH3
TH4
TH6
TH7
TH8
LEV-A
DCL
ACTM
CB
PUHZ-P125VHA2.UK
PUHZ-P140VHA21.UK
PUHZ-P125VHA3.UK
PUHZ-P125VHA3R1.UK
NAME
Terminal Block<Power Supply, Indoor/Outdoor >
Motor Compressor
Fan Motors
Solenoid Valve (Four-Way Valve)
Solenoid Valve (Bypass Valve)
Crankcase Heater
High Pressure Switch
Thermistor<Outdoor Pipe>
Thermistor<Discharge>
Thermistor<Outdoor 2-Phase Pipe>
Thermistor<Outdoor>
Thermistor<Heatsink>
Electronic Expansion Valve
Reactor
Active Filter Module
Main Smoothing Capacitor
SYMBOL
P.B.
TABU/V/W
TABS/T
TABP1/P2/P
TABN1/N2/N
DS2,3
IPM
N.F.
C.B.
F1~F4
SW1
SW4
SW5
SW6
SW7
PUHZ-P140VHA2.UK
PUHZ-P140VHA3.UK
PUHZ-P140VHA3R1.UK
NAME
Power Circuit Board
Connection Terminal<U/V/W-Phase>
Connection Terminal<L/N- Phase>
Connection Terminal<DC Voltage>
Connection Terminal<DC Voltage>
Diode Bridge
Power Module
Noise Filter Circuit Board
Controller Circuit Board
Fuse<T6.3AL250V>
Switch<Forced Defrost, Defect History Record
Reset, Refrigerant Address>
Switch<Test Operation>
Switch<Function Switch>
Switch<Model Select>
Switch<Function Setup>
SYMBOL
SW8
SW9
SWP
CN31
LED1,LED2
NAME
Switch
Switch
Switch<Pump Down>
Connector<Emergency Operation>
Light Emitting Diodes
<Operation Inspection Indicators>
CNM
Connector<A-Control Service Inspection Kit>
Connector<Connected to Optional M-NET Adapter Board>
CNMNT
CNVMNT
Connector<Connected to Optional M-NET Adapter Board>
CNDM
Connector<Connected for Option (Contact Input)>
X51,X52,X54,X55 Relay
When M-NET adaptor is connected
63H
3
1
CN4
(WHT)
1 2
CN2
1 (WHT) 7
TRANS
CNM
(WHT)
F1
3
CN52C
(RED)
1 2
7
F3
F4
21S4 3
(GRN)
4
1
21S4
3
1 SV2 3
(BLU)
1 SV1/CH 3
(GRY)
1 SS
(WHT)
CN5
(WHT)
LED2
SW12
LED3
LED4
M-NET SUBSTRATE
2
1
CN31
2
2
CNAC
(WHT)
1
2
14
SW11
SW1
LED5 CN2M
(WHT)
LED1
1
SW6
1 31
5
CNVMNT CNMNT
(WHT) (WHT)
SW1
6
3
1
63H
(YLW)
1
CNDC
(PNK)
F2
CNS
(WHT)
LEV-A
(WHT)
SW4 SWP SW8 SW5
CNF2
(WHT)
3
2
1
1
+1
CN51 CNDM
(WHT) (WHT)
+2
1
4 1 2 2 1
TH7/6 TH3 TH4
(RED) (WHT) (WHT)
X51
MS
3~
+1
X54
7
5
X55
1
3
5
t
CND
(WHT)
3 1
3
1
A B S
TB7
3
1
M-NET
5
CH
+2
SV
+2
1
52C
LO
NO
N.F.
CN52C
(BLK)
1
DS3 TABT
–
+
U
1
~
TABP1
E2
U
DCL
+
L
—
1
P
N1
N2
N
S1
S2
6
S3
TB1
CN5
(RED)
U
EI
+ 1 MODEL SELECT
MODEL
SW5-6 + 3
100V
ON
OFF
125V
ON
OFF
140V
ON
OFF
INDOOR
UNIT
Io
ACTM
U
CY1
CY2
4
L2
2
2
1
V
W
MS
3~ MC
L1
1
3
(WHT)
CNAC1
TABP
+
LI
+
3
~
TABN2
2
–
3
+
~
~
DS2 TABS
TABN1
t 2
7
1 CN3
2 (WHT)
1 CN5
2 (RED)
1 CN4
2 (WHT)
TABN
TABP2
TH8
IPM
–
+
NI
6
1
CN2
(WHT)
CB
CNDC
(PNK) 2
1
(RED)
CNAC2
CNAF
(WHT)
7
2
2
P.B.
4
RED TABU
WHT TABV
BLK
TABW
MF2
t
LED1
MS
3~
t
LED2
MF1
t
7
CNF1
(WHT)
X52
1
M
SW9 SW7
TH7 TH6 TH3 TH4
C.B.
5
LEV-A
POWER SUPPLY
~/N 230V 50Hz
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
ON
OFF
ON
OFF
ON
OFF
SW6
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
+ 2 P125, P140 only
+ 3 SW5-1 to 5: Function Switch
15
9
WIRING SPECIFICATIONS
9-1. FIELD ELECTRICAL WIRING (power wiring specifications)
Outdoor unit model
Outdoor unit power supply
P100, 125V
~/N (single), 50 Hz,
230 V
*1
Circuit rating
Wiring
Wire No. %
size (mm2)
Outdoor unit input capacity
Main switch (Breaker)
Outdoor unit power supply
Outdoor unit power supply earth
Indoor unit-Outdoor unit
Indoor unit-Outdoor unit earth
Remote controller-Indoor unit
Outdoor unit L-N (single)
Outdoor unit L1-N, L2-N, L3-N (3 phase)
Indoor unit-Outdoor unit S1-S2
Indoor unit-Outdoor unit S2-S3
Remote controller-Indoor unit
P140V
~/N (single), 50 Hz,
230 V
32 A
40 A
*2
*2
*3
2 % Min. 4
1 % Min. 4
3 % 1.5 (Polar)
1 % Min. 1.5
2 % 0.3 (Non-polar)
2 % Min. 6
1 % Min. 6
3 % 1.5 (Polar)
1 % Min. 1.5
2 % 0.3 (Non-polar)
*4
AC 230 V
AC 230 V
*4
*4
*4
AC 230 V
DC 24 V
DC 12 V
AC 230 V
DC 24 V
DC 12 V
*1. A breaker with at least 3 mm contact separation in each pole shall be provided. Use earth leakage breaker(NV).
*2. Refer to 9-3.
*3. The 10 m wire is attached in the remote controller accessory.
*4. The figures are NOT always necessarily the voltage to ground.
S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulated by the transformer or other device.
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Power supply cords and Indoor/Outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)
3. Install an earth longer than other cables.
Power supply
Isolator
3 poles isolator
S1
S1
A-Control S2
Outdoor Unit
S2
S3
S3
A-Control
Indoor Unit
Warning:
In case of A-control wiring, there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power line
and communication signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, S3 terminals when the power is
energized. If isolator should be used between indoor unit and outdoor unit, please use 3-pole type.
1:1 system
Synchronized twin and triple system Electrical wiring
• Synchronized twin
Outdoor
unit
Unit
power
supply
Earth leakage breaker
wiring circuit breaker or
isolating switch
L
N
S1
S2
S3
Indoor/outdoor
unit connection
cable
Outdoor
unit
Indoor
unit
1
2
S1
S2
S3
Remote
controller
Unit
power
supply
Earth leakage breaker
wiring circuit breaker or
isolating switch
L
N
S1
S2
S3
Indoor/outdoor
unit connection
cable
Indoor
unit
1
2
Indoor
unit
Remote
controller
S1
S2
S3
1
2
S1
S2
S3
• Synchronized triple
Outdoor
unit
Unit
power
supply
Earth leakage breaker
wiring circuit breaker or
isolating switch
16
Indoor
unit
1
2
L
N
S1
S2
S3
Indoor/outdoor
connection cable
S1
S2
S3
Remote
controller
Indoor
unit
Indoor
unit
1
2
1
2
S1
S2
S3
S1
S2
S3
9-2. 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
<For models without heater>
* The optional indoor power supply terminal kit is required.
L
N
Outdoor unit power supply
Earth leakage breaker
Wiring circuit breaker or isolating switch
Outdoor unit
Indoor unit/outdoor unit connecting cords
Remote controller
Indoor unit
Option
Indoor unit power supply
S1
S2
S3
L
N
S1
S2
S3
1
2
* Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.
Simultaneous twin/triple system
<For models without heater>
* The optional indoor power supply terminal kits are required.
L
N
L
L
L
L
N
N
N
N
S1
S1
S1
S2
S2
S2
S3
S3
S3
S3
1
1
1
1
2
2
2
2
S3
S1
S2
S1
S2
Outdoor unit power supply
Earth leakage breaker
Wiring circuit breaker or isolating switch
Outdoor unit
Indoor unit/outdoor unit connecting cords
Remote controller
Indoor unit
Option
Indoor unit power supply
Indoor unit earth
* Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.
If the indoor and outdoor units have separate power supplies, refer to the table below.
If the optional indoor power supply terminal kit is used, change the indoor unit
electrical box wiring refering to the figure in the right and the DIP switch settings of
Electric heater
the outdoor unit control board.
L
N
Required
3
1
2
Indoor unit
control board
Indoor unit power supplied from outdoor unit
(when shipped from factory)
(SW8)
Electric heater
(For models with
heater)
L
N
S1
S2
S3
Connectors
CND or
CN01
Set the SW8-3 to ON.
* There are three types of labels (labels A, B and C). Affix the appropriate labels to
the units according to the wiring method.
If the indoor and
outdoor units have
separate power
supplies, change the
connections of the
connectors as shown
in the following
figure.
BLUE YELLOW
YELLOW BLUE
ON
OFF
S1
S2
S3
CND or
CN01
Required
BLUE YELLOW
BLUE YELLOW
Indoor power supply terminal kit (option)
Indoor unit electrical box connector connection change
Label affixed near each wiring diagram
for the indoor and outdoor units
Outdoor unit DIP switch settings (when
using separate indoor unit/outdoor unit
power supplies only)
(For models with
heater)
Indoor unit specifications
Required
Connectors (connections when shipped
from the factory are for indoor unit power
supplied from outdoor unit)
Indoor unit
control board
Separate indoor unit/outdoor unit power
supplies
Indoor unit model
Indoor unit power supply
Indoor unit input capacity
Main switch (Breaker)
Indoor unit power supply
Indoor unit power supply earth
Indoor unit-Outdoor unit
Indoor unit-Outdoor unit earth
Remote controller-Indoor unit
RP35~140
~/N (single), 50 Hz, 230 V
16 A
*1
Circuit
rating
Wiring
Wire No. % size
(mm2)
2 % Min. 1.5
1 % Min. 1.5
2 % Min. 0.3
*2
–
2 % 0.3 (Non-polar)
*3
Indoor unit L-N
*4
AC 230 V
–
Indoor unit-Outdoor unit S1-S2
*4
Indoor unit-Outdoor unit S2-S3
*4
DC24 V
Remote controller-Indoor unit
*4
DC12 V
*1. A breaker with at least 3 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
*2. Max. 120 m
*3. The 10 m wire is attached in the remote controller accessory. Max. 500 m
*4. The figures are NOT always necessarily the voltage to ground.
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Power supply cords and indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord.
(Design 60245 IEC 57)
3. Install an earth longer than other cables.
17
9-3. INDOOR – OUTDOOR CONNECTING CABLE
The cable shall not be lighter than design 60245 IEC or 60227 IEC.
The cable length may vary depending on the condition of installation, humidity or materials, etc.
Cross section
of cable
Wire size
(mm2)
Number
of wires
2.5
3
Clockwise : S1-S2-S3
2.5
3
Not applicable
(Because center wire has no cover finish)
1.5
4
From left to right : S1-Open-S2-S3
45
*3
2.5
4
Clockwise : S1-S2-S3-Open
Connect S1 and S3 to the opposite angle
60
*4
Polarity
L(m) *5
Round
Flat
50
*1
Flat
Round
Not
applicable
*2
*1 : In case that cable with stripe of yellow and green is available.
*2 : In case that the flat cables are connected as this picture, they can be used up to 80m.
(3C Flat cable × 2)
S1 S2 S3
2
*3 : In case of regular polarity connection (S1-S2-S3), wire size is 1.5mm .
*4 : In case of regular polarity connection (S1-S2-S3)
*5 : Mentioned cable length is just a reference value.
It may be different depending on the condition of installation, humidity or materials, etc.
Outdoor power supply
Indoor unit-Outdoor unit
Indoor unit-Outdoor unit earth
Wire No. % Size ($)
Max. 45m
Max. 50m
Max. 80m
3 % 1.5 (polar)
3 % 2.5 (polar)
3 % 2.5 (polar) and S3 separated
1 % Min. 1.5
1 % Min. 2.5
1 % Min. 2.5
+ The Max. cable length may vary depending on the condition of installation, humidity or materials, etc.
Indoor/Outdoor separate
power supply
Wire No. % Size ($)
Indoor unit-Outdoor unit
2 % Min. 0.3
Max. 120m
Indoor unit-Outdoor unit earth
—
+ The optional indoor power supply terminal kit is necessary.
Be sure to connect the indoor-outdoor connecting cables directly to the units (no intermediate connections).
Intermediate connections can lead to communication errors if water enters the cables and causes insufficient insulation to
earth or a poor electrical contact at the intermediate connection point.
18
9-4. M-NET WIRING METHOD
(Points to note)
(1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from
making an influence on the signal communication. Place them at intervals of more than 5cm. Do not put them in the same
conduit tube.
(2) Terminal block (TB7) for transmission wires should never be connected to V power supply. If it is connected,
electronic parts on M-NET P.C. board may burn out.
(3) Use 2-core x 1.25mm² 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.
Group
remote
controller
Power
supply
unit for
transmission
wire
Refrigerant
address 00
M-NET
address 01
Refrigerant
address 00
M-NET
address 02
A-control
A-control
remote
remote
controller
controller
It would be ok if M-NET wire (non-polar, 2-cores) is arranged in addition to the
Refrigerant
address 00
M-NET
address 03
A-control
remote
controller
wiring for A-control.
(4) Earth only one of any appliances through M-NET transmission wire (shield wire). Communication error may occur due to
the influence of electromagnetic noise.
“Ed” error will appear on the LED display of outdoor unit.
“0403” error will appear on the central-control remote controller.
Bad example (Multi spot earthing of shield wire)
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
Good example 1 (Single spot earthing of shield wire)
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
Good example 2 (Single spot earthing of shield wire)
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
If there are more than 2 grounding spots on the shield wire, noise may enter into the shield wire because the earth wire
and shield wire form 1 circuit and the electric potential difference occurs due to the impedance difference among earthing
spots. In case of single spot grounding, noise does not enter into the shield wire because the earth wire and shield wire do
not form 1 circuit.
To avoid communication errors caused by noise, make sure to observe the single spot grounding method described in the
installation manual.
19
M-NET wiring
M-NET
(1) Use 2-core × 1.25mm² shield wire for electric wires.
terminal
Earth
(Excluding the case connecting to system controller.)
block
wire
(2) Connect the wire to the M-NET terminal block. Connect one core of the transmission wire (no-polarity) to A terminal and the other to B. Peel the shield wire,
A B S
twist the shield part to a string and connect it to S terminal.
Transmission
Shield
(3) In the system which several outdoor units are being connected, the terminal
wire part
(A, B, S) on M-NET terminal block should be individually wired to the other
outdoor unit’s terminal, i.e. A to A, B to B and S to S. In this case, choose one of those outdoor units and drive a screw
to fix an ground wire on the plate as shown on the right figure.
9-4-1. M-NET address setting
In A-control models, M-NET address and refrigerant address should be set only for the outdoor unit. Similar to CITY MULTI
system, there is no need to set the address of outdoor unit and remote controller. To construct a central control system, the
setting of M-NET address should be conducted only upon the outdoor unit. The setting range should be 1 to 50 (the same as
that of the indoor unit in CITY MULTI system), and the address number should be consecutively set in a same group.
901
901
901
78
78
901
456
23
78
78
~
23
456
456
23
901
23
901
50
23
456
2
23
456
setting SW12
tens
digit
1
456
SW11
ones
Switng digit
78
<Setting example> M-NET Address No.
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.
(Factory setting: all addresses are set to “0”.)
78
9-4-2. 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”.)]
ON
ON
OFF
Refrigerant
address
ON
OFF
1 2 3 4 5 6
0
ON
1 2 3 4 5 6
ON
9
ON
11
13
7
ON
OFF
1 2 3 4 5 6
12
1 2 3 4 5 6
6
ON
OFF
1 2 3 4 5 6
OFF
1 2 3 4 5 6
5
OFF
1 2 3 4 5 6
10
ON
OFF
1 2 3 4 5 6
4
ON
OFF
1 2 3 4 5 6
ON
OFF
1 2 3 4 5 6
3
OFF
1 2 3 4 5 6
8
ON
OFF
1 2 3 4 5 6
2
ON
OFF
OFF
ON
OFF
1 2 3 4 5 6
1
ON
ON
OFF
1 2 3 4 5 6
OFF
1 2 3 4 5 6
1 2 3 4 5 6
14
15
9-4-3. 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.
Group A
System
controller
Power
supply
unit for
transmission
wire
Group B
Refrigerant
address 00
M-NET
address 01
Group C
Refrigerant
address 00
M-NET
address 02
Refrigerant
address 01
M-NET
address 03
Refrigerant
address 00
M-NET
address 04
TB5
A-control
remote
controller
A-control
remote
controller
A-control
remote
controller
w Refrigerant addresses can be overlapped if they are in the different group.
Group A
System
controller
Power
supply
unit for
transmission
wire
Refrigerant
address 00
M-NET
address 01
Group B
Refrigerant
address 01
M-NET
address 02
Refrigerant
address 00
M-NET
address 04
Refrigerant
address 01
M-NET
address 03
Refrigerant
address 02
M-NET
address 05
TB5
A-control
remote
controller
A-control
remote
controller
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
“3” is right for this situation, the setting is wrong. Taking group A as a good sample, set the minimum M-NET address in the
group for the outdoor unit whose refrigerant address is “00”.
20
10
REFRIGERANT SYSTEM DIAGRAM
Unit : mm(inch)
PUHZ-P100VHA2.UK
PUHZ-P100VHA3.UK
PUHZ-P100VHA3R1.UK
Refrigerant flow in cooling
Refrigerant flow in heating
Stop valve
4-way valve
Service
port
(check)
High pressure
protect switch
Outdoor heat exchanger
(#50)
Strainer
Refrigerant GAS pipe
15.88mm(:5/8)
Service
port
(check)
Thermistor
(TH6)
Thermistor
(TH3)
Muffler
Thermistor
(TH4)
Accumulator
Strainer
(#40)
Distributor
Compressor
(#100)
Strainer
Refrigerant LIQUID pipe
9.52mm(:3/8)
Stop valve
(with service port)
PUHZ-P125VHA2.UK
PUHZ-P125VHA21.UK
PUHZ-P125VHA3.UK
PUHZ-P125VHA3R1.UK
Linear expansion valve
PUHZ-P140VHA2.UK
PUHZ-P140VHA21.UK
PUHZ-P140VHA3.UK
PUHZ-P140VHA3R1.UK
4-way
valve
Stop valve
Refrigerant GAS pipe
15.88mm(:5/8)
(#100)
Strainer
Service port
(check)
High pressure protect switch
Bypass valve
Thermistor
(TH6)
(#50)
Strainer
Distributor
Service
port
(check)
Muffler
Thermistor
(TH4)
Refrigerant LIQUID pipe
9.52mm(:3/8)
Strainer
(#40)
Accumulator
Compressor
Strainer
(#100)
Strainer
(#100)
Linear expansion valve
Stop valve
(with service port)
21
Thermistor (TH3)
Capillary tube
(:4.0%:3.0%-L200)%2
1. Refrigerant recovery (pump down)
Perform the following procedures to recover the refrigerant when moving the indoor unit or the outdoor unit.
1Turn 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.
2After 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 recovery 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 recovery operation only when the unit is
stopped. However, refrigerant recovery 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 recovering 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.
wIf the refrigerant recovering 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.
4Turn off the power supply (circuit breaker.)
2. Start and finish of test run
• Operation from the indoor unit
Execute the test run using the installation manual for the indoor unit.
• Operation from the outdoor unit
By using the DIP switch SW4 on the control board of outdoor unit, test run can be started and finished, and its operation
mode (cooling/heating) can be set up.
<SW4>
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.
ON
OFF
• There may be a faint knocking sound around the machine room after power is supplied, but this is
1
2
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
Operation
starts operating. But this is not a problem with product because the check valve itself generates the Stop
Cooling Heating
sound due to small pressure difference in the refrigerant circuit.
Note:
The operation mode cannot be changed by SW4-2 during test run. (To change test run mode, stop the unit by SW4-1,
change the operation mode and restart the test run by SW4-1.)
22
11
TROUBLESHOOTING
11-1. 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.
Unit conditions at service
Error code
Actions to be taken for service (summary)
Displayed
Judge what is wrong and take a corrective action according
to “11-4. Self-diagnosis action table”.
The trouble is reoccurring.
Not displayed
Conduct trouble shooting and ascertain the cause of the
trouble according to “11-5. Troubleshooting by inferior
phenomena”.
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, weather 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.
Logged
The trouble is not reoccurring.
Not logged
Re-check the abnormal symptom.
Conduct trouble shooting and ascertain the cause
of the trouble according to “11-5. 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.
11-2. 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 leakage, loosened connections and incorrect polarity.
• Measure impedance between the ground and the power supply terminal block (L, N) 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 “Selection of Functions through Remote Controller”.
Make sure to read operation manual before test run. (Especially items to secure safety.)
23
"TEST RUN" and the currently selected
operation mode are displayed alternately.
Displays the remaining
test run time.
Operating procedures
1. Turn on the main power supply.
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
2. Press TEST button twice.
The TEST RUN appears on the screen.
3. Press OPERATION SWITCH
button.
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.)
4. Press AIR DIRECTION button. Check for correct motion of auto-vanes.
5. Check the outdoor unit fan for
correct running.
[TEST] button
Pipe (liquid) temperature
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.
6. Press the ON/OFF button to reset the test run in progress.
7. Register the contact number.
• In case of test run, the OFF timer will be activated, and the test run will automatically stop after 2 hours.
• 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 and triple operation. Malfunctions may not
be displayed regardless of incorrect wiring.
w1 After turning on the power supply, the system will go into start up 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 light up. (After the start up 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 does not function correctly, the causes written below should be considered. Find causes from
the symptoms.
The below symptoms are under test run mode. “start up” in the table means the display status of w1 written above.
Symptoms in test run mode
OUTDOOR BOARD LED Display
Remote Controller Display
< > indicates digital display.
After “startup” is displayed, only
Remote controller displays “PLEASE
green lights up. <00>
WAIT”, and cannot be operated.
After “startup” is displayed,
green(once) and red(once) blink
After power is turned on, “PLEASE WAIT” alternately. <F1>
is displayed for 3 minutes, then error code
After “startup” is displayed,
is displayed.
green(once) and red(twice) blink
alternately. <F3, F5, F9>
After “startup” is displayed,
green(twice) and red(once) blink
No display appears even when remote
alternately. <EA, Eb>
controller operation switch is turned on.
After “startup” is displayed, only
(Operation lamp does not light up.)
green lights up. <00>
Display appears but soon disappears
even when remote controller is operated.
After “startup” is displayed, only
green lights up. <00>
Cause
• After power is turned on, “PLEASE WAIT” is displayed for 2
minutes during system startup. (Normal)
• Incorrect connection of outdoor terminal block (L1, L2, L3 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)
w Press the remote controller’s CHECK button twice to perform self-diagnosis. See the table below for the contents of LCD
display.
LCD
P1
P2
P4
P5
P6
P8
P9
Fb
Contents of trouble
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
U1~UP
F3~F9
E0~E5
E6~EF
---FFFF
PA
Contents of trouble
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)
See the table below for details of the LED display (LED 1, 2, 3) on the indoor controller board.
LED1 (microcomputer power supply)
LED2 (remote controller)
Lights when power is supplied.
Lights when power is supplied for wired remote controller.
The indoor unit should be connected to the outdoor unit with address “0” setting.
LED3 (indoor/outdoor communication)
Flash when indoor and outdoor unit are communicating.
24
Test run [for wireless remote controller]
TEST RUN
TEMP
ON/OFF
MODE
,
FAN
AUTO STOP
VANE
AUTO START
CHECK LOUVER
min
TEST RUN
SET
h
RESET
Measure an impedance between the power supply terminal block on
the outdoor unit and ground with a 500V Megger and check that it is
equal to or greater than 1.0M".
1 Turn on the main power to the unit.
TEST RUN
2 Press the
button twice continuously.
(Start this operation from the status of remote controller display
turned off.)
TEST RUN
and current operation mode are displayed.
MODE
3 Press the
(
) button to activate COOL mode, then
check whether cool air is blown out from the unit.
MODE
4 Press the
(
) button to activate HEAT mode, then
check whether warm air is blown out from the unit.
FAN
5 Press the
button and check whether strong air is blown out
from the unit.
VANE
6 Press the
button and check whether the auto vane operates
properly.
7 Press the ON/OFF button to stop the test run.
CLOCK
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.
25
11-3. HOW TO PROCEED "SELF-DIAGNOSIS"
11-3-1. When a Problem Occurs During Operation
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 the case of group control, for which one 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
ON/OFF button.
(Alternating Display)
Error code (2 or 4 digits)
Address (3 digits) or unit number (2 digits)
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.
11-3-2. 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 shut off.
Check the error code history for each unit using the remote controller.
Switch to self-diagnosis mode.
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] and [15].
Press the CHECK
button twice within 3 seconds. The display content
will change as shown below.
The refrigerant address will begin to flash
approximately 3 seconds after being selected
and the self-diagnosis process will begin.
Unit number or refrigerant address
to be diagnosed
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.)
(Alternating Display)
Error code (2 or 4 digits)
<When there is no error code history>
Address (3 digits) or unit number (2 digits)
<When there is no corresponding unit>
Reset the error history.
Display the error history in the diagnosis result display screen (see step ).
26
Press the
ON/OFF button twice within 3 seconds. The self-diagnosis
address or refrigerant address will flash.
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 two methods.
Press the
CHECK
Press the
button twice within 3 seconds.
ON/OFF button.
Self-diagnosis will be cancelled and the screen will return to the previous state in effect before the start
of self-diagnosis.
Self-diagnosis will be cancelled and the indoor unit will stop.
11-3-3. 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.
Power on indicator
Switch to the remote controller self-diagnosis mode.
Press the CHECK button for 5 seconds or more. The display content will
Press the FILTER button to start self-diagnosis.
change as shown below.
Remote controller self-diagnosis result
[When the remote controller is functioning correctly]
[When the remote controller malfunctions]
(Error display 1) "NG" flashes. ©The remote controller's transmitting-receiving circuit is defective.
Check for other possible causes, as there is no problem with the remote
controller.
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] flashes.© 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.
When the number of data errors is "02":
Transmission data from remote controller
Transmission data on 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 flash. After
approximately 30 seconds, the state in effect before the diagnosis will be restored.
27
11-3-4. Malfunction-diagnosis method by wireless remote controller
<In case of trouble during operation>
When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform
unusual stop.
<Malfunction-diagnosis method at maintenance service>
[Procedure]
Refrigerant
address
display
CHECK
CHECK
display
Temperature
button
TEMP
ON/OFF
1. Press the CHECK button twice.
• "CHECK" lights, and refrigerant
address "00" flashes.
• Check that the remote controller's
display has stopped before continuing.
2. Press the temperature
buttons.
• Select the refrigerant address of the
indoor unit for the self-diagnosis.
Note: Set refrigerant address using the
outdoor unit’s DIP switch (SW1).
(For more information, see the
outdoor unit installation manual.)
ON/OFF
button
MODE
FAN
AUTO STOP
VANE
AUTO START
CHECK LOUVER
CHECK
button
min
TEST RUN
SET
h
RESET
CLOCK
HOUR
button
3. Point the remote controller at the • If an air conditioner error occurs, the
sensor to the indoor unit and
indoor unit's sensor emits an intermitpress the HOUR button.
tent buzzer sound, the operation light
flashes, and the error code is
output.
(It takes 3 seconds at most for error
code to appear.)
4. Point the remote controller at the • The check mode is cancelled.
sensor to the indoor unit and
press the ON/OFF button.
28
• Refer to the following tables for details on the check codes.
[Output pattern A]
Beeper sounds
OPERATION
INDICATOR
lamp blink
pattern
Beep
Beep Beep Beep
Off
Beep
1st
2 nd
3 rd
nth
On
On
On
On
Beep Beep
1st
Off
On
2 nd · · · Repeated
On
0.5 sec. Approx. 2.5 sec. 0.5 sec. 0.5 sec.
Self-check Approx. 2.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.
starts
(Start signal
Number of blinks/beeps in pattern indicates the check
Number of blinks/beeps in pattern indicates
received)
code in the following table (i.e., n=5 for “P5”)
the check code in the following table
[Output pattern B]
Beeper sounds
OPERATION
INDICATOR
lamp blink
pattern
Beep
Beep Beep Beep
1st
Off
Self-check Approx. 2.5 sec.
starts
(Start signal
received)
On
Approx. 3 sec.
2nd
3 rd
On
On
On
0.5 sec. 0.5 sec. 0.5 sec.
Beep
Beep
nth
1st
On
Off
0.5 sec. Approx. 2.5 sec.
Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “U2”)
On
Approx. 3 sec.
Beep
2 nd · · · Repeated
On
On
0.5 sec. 0.5 sec.
Number of blinks/beeps in pattern indicates
the check code in the following table
[Output pattern A] Errors detected by indoor unit
Wireless remote controller Wired remote controller
Beeper sounds/OPERATION
Symptom
INDICATOR lamp blinks
Check code
(Number of times)
1
P1
Intake sensor error
P2
Pipe (TH2) sensor error
2
P9
Pipe (TH5) sensor error
Indoor/outdoor unit communication error
3
E6,E7
4
P4
Drain sensor error/Float switch connector open
5
P5
Drain pump error
PA
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.)
Remote controller transmission error
E0, E3
–
–
E1, E2
Remote controller control board error
[Output pattern B] Errors detected by unit other than indoor unit (outdoor unit, etc.)
Wireless remote controller Wired remote controller
Beeper sounds/OPERATION
Symptom
INDICATOR lamp blinks
Check code
(Number of times)
Indoor/outdoor unit communication error
1
E9
(Transmitting error) (Outdoor unit)
Compressor overcurrent interruption
2
UP
Open/short of outdoor unit thermistors
3
U3,U4
Compressor overcurrent interruption (When compressor locked)
4
UF
Abnormal high discharging temperature/49 worked/
5
U2
insufficient refrigerant
Abnormal high pressure (63H worked)/Overheating
U1,Ud
6
protection operation
Abnormal temperature of heatsink
U5
7
Outdoor unit fan protection stop
8
U8
9
Compressor overcurrent interruption/Abnormal of power module
U6
Abnormality of superheat due to low discharge temperature
10
U7
Abnormality such as overvoltage or voltage shortage and
11
U9,UH
abnormal synchronous signal to main circuit/Current sensor error
–
–
12
–
–
13
Others
Other errors
14
*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 sec.)” after the initial two beeps to confirm
the self-check start signal was received, the specified refrigerant address is incorrect.
29
Remark
As for indoor unit,
refer to indoor
units service
manual.
Remark
For details, check
the LED display
of the outdoor
controller board.
11-4. 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. (P.33~35)
Error Code
Abnormal points and detection method
None
—
Judgment and action
Case
1 No voltage is supplied to terminal 1 Check following items.
a) Power supply breaker
block (TB1) of outdoor unit.
b) Connection of power supply terminal block
a) Power supply breaker is
(TB1)
turned off.
c) Connection of power supply terminal block
b) Contact failure or disconnec(TB1)
tion of power supply
terminal
c) Open phase (L or N phase)
2 Check following items.
2 Electric power is not supplied
a) Connection of power supply terminal block
to power supply terminal of out(TB1)
door power circuit board.
b) Connection of terminal on outdoor
a) Contact failure of power
power circuit board
supply terminal
Disconnection of connector TABT or TABS
b) Open phase on the outdoor
Refer to 11-9.
power circuit board
:Disconnection of connector
TABT or TABS
3 Electric power is not supplied to 3 Check connection of the connector (CNDC)
on the outdoor controller circuit board.
outdoor controller circuit board.
Check connection of the connector (CNDC)
a) Disconnection of connector
on the outdoor power circuit board
(CNDC)
Refer to 11-9.
4 Disconnection of reactor (DCL) 4 Check connection of reactor. (DCL)
Check connection of “L1” and “L2” on the
active filter module. (ACTM)
5 Disconnection of outdoor noise 5 a) Check connection of outdoor noise filter
circuit board.
filter circuit board or parts failb) Replace outdoor noise filter circuit board.
ure in outdoor noise filter circuit
Refer to 11-9.
board
It is especially needed to check
the resistance RS1 on the noise
filter cuircuit board.
6 Defective outdoor power circuit 6 Replace outdoor power circuit board.
board
7 Replace outdoor controller circuit board (When
7 Defective outdoor controller
items above are checked but the units cannot
circuit board
be repaired).
F5
(5201)
63H connector open
Abnormal if 63H connector circuit is open
for 3 minutes continuously after power is
supplied.
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
30
1 Check connection of 63H connector on
outdoor controller circuit board.
Refer to 11-9.
2 Check the connceting wire on 63H side.
3 Check continuity by tester.
Replace the parts if the parts are defective.
4 Replace outdoor controller circuit board.
Error Code
EA
(6844)
Eb
(6845)
EC
(6846)
Abnormal points and detection method
Case
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”.
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 one 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.
Judgment and action
1 Check disconnection or looseness or polarity 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.
Miswiring of indoor/outdoor unit
connecting wire (converse wiring or disconnection)
Outdoor controller circuit board can
automatically set the unit number of indoor
units.
Abnormal if the indoor unit number can
not be set within 4 minutes after power on
because of miswiring (converse wiring or
disconnection) of indoor/outdoor unit connecting wire.
1 Contact failure or miswiring of 7 Check if refrigerant addresses (SW1-3 to
indoor/outdoor unit connecting
SW1-6 on outdoor controller circuit board)
wire
are overlapping in case of group control
2 Diameter or length of indoor/
system.
outdoor unit connecting wire is
out of specified capacity.
8 Check transmission path, and remove the
4 Defective transmitting receiving
cause.
circuit of outdoor controller circuit
board
w The descriptions above, 1-8, are for EA, Eb
5 Defective transmitting receiving
and EC.
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.
Start-up time over
The unit cannot finish start-up process
within 4 minutes after power on.
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.
31
<Abnormalities detected while unit is operating>
Error Code
Abnormal points and detection method
High pressure (High-pressure switch
63H worked)
Abnormal if high-pressure switch 63H
worked ( w ) during compressor operation.
w 4.15 MPa
63H: High-pressure switch
U1
(1302)
High discharging temperature
(1) Abnormal if discharge temperature
thermistor (TH4) exceeds 125: or
110: continuously for 5 minutes.
Abnormal if condenser/evaporator
temperature thermistor (TH5) exceeds
40: during defrosting and discharge
temperature thermistor (TH4) exceeds
110:.
U2
(1102)
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 fully 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
Judgment and action
1~6Check indoor unit and repair defect.
1 Over-heated compressor
operation 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
1 Check intake super heat.
Check leakage of refrigerant.
Charge additional refrigerant.
2 Check if stop valve is full open.
34 Turn the power off and check if U3 is displayed when the power is turned on again.
When U3 is displayed, refer to “Judgement
and action” for U3.
5 Check linear expansion valve.
Refer to 11-6.
(2) Abnormal if discharge super heat
(Cooling: TH4 – TH5/Heating: TH4 –
TH6) increases.
All the conditions in A or B are detected
simultaneously for 10 minutes
continuously after 6 minutes past from
compressor start-up (including the
thermostat indication or recovery from
defrosting).
<Condition A>
• Heating mode
• When discharge super heat is less
than 70 deg.
• When the TH6 temp is more than the
value obtained by TH7 – 5 deg.
• When the condensing temp of TH5 is
less than 35:.
<Condition B>
• During comp operation (Cooling and
Heating)
• When discharge super heat is less
than 80 deg in Cooling.
• When discharge super heat is less
than 90 deg in Heating.
• When condensing temp of TH6 is
more than –40:. (In Cooling only.)
32
7 Check if stop valve is fully open.
8 Check piping and repair defectives.
9~2 Check outdoor unit and repair defectives.
3 Check the inspected temperature of outside
temperature thermistor on LED display.
(SW2 on A-Control Service Tool : Refer to
11-10.)
4~6 Turn the power off and check F5 is
displayed when the power is turned again.
When F5 is displayed, refer to “Judgment
and action” for F5.
7 Check linear expansion valve.
Refer to 11-6.
8 Replace outdoor controller board.
Error Code
U3
(5104)
Abnormal points and detection method
Case
Open/short circuit of discharge
1 Disconnection or contact
temperature thermistor (TH4)
failure of connector (TH4) on
Abnormal if open (3: or less) or short
the outdoor controller circuit
(217: or more) is detected during
board
compressor operation.
2 Defective thermistor
(Detection is inoperative for 10 minutes
3 Defective outdoor controller
of compressor starting process and for 10
circuit board
minutes after and during defrosting.)
1 Check connection of connector (TH4) on the
outdoor controller circuit board.
Check breaking of the lead wire for
thermistor (TH4). Refer to 11-9.
2 Check resistance value of thermistor (TH4) or
temperature by microcomputer.
(Thermistor/TH4: Refer to 11-6.)
(SW2 on A-Control Service Tool: Refer to
11-10.)
3 Replace outdoor controller board.
Open/short of outdoor unit thermistors 1 Disconnection or contact failure
(TH3, TH6, TH7, and TH8)
of connectors
Outdoor controller circuit
Abnormal if open or short is detected
board: TH3,TH6/TH7
during compressor operation.
Outdoor power circuit board:
Open detection of thermistors TH3 and
CN3
TH6 is inoperative for 10 seconds to 10
minutes after compressor starting and 10 2 Defective thermistor
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.)
3 Defective outdoor controller
circuit board
)
(
U4
(TH3:5105)
(TH6:5107)
(TH7:5106)
(TH8:5110)
Judgment and action
Symbol
TH3
TH6
TH7
TH8
Thermistors
Name
Thermistor <Outdoor pipe>
Thermistor <Outdoor 2-phase pipe>
Thermistor <Outdoor>
Thermistor <Heatsink>
Temperature of heatsink
Abnormal if heatsink thermistor(TH8)
detects temperature indicated below.
P100-140V·············79:
1 Check connection of connector (TH3,TH6/TH7)
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,TH6,TH7,TH8). Refer to 11-9.
2 Check resistance value of thermistor
(TH3,TH6,TH7,TH8) or check temperature by
microcomputer.
(Thermistor/TH3,TH6,TH7,TH8: Refer to 11-6.)
(SW2 on A-Control Service Tool: Refer to
11-10.)
3 Replace outdoor controller circuit board.
WEmergency operation is available in case of
abnormalities of TH3, TH6 and TH7.
Refer to 11-8.
Open detection
Short detection
– 40 or below
– 40 or below
– 40 or below
– 27 or below
90 or above
90 or above
90 or above
102 or above
1 The outdoor fan motor is
locked.
2 Failure of outdoor fan motor
3 Airflow path is clogged.
4 Rise of ambient temperature
U5
(4230)
5 Defective thermistor
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:.)
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 11-6.)
(SW2 on A-Control Service Tool: Refer to
11-10.)
6 Replace outdoor power circuit board.
6 Defective input circuit of
outdoor power circuit board
7 Failure of outdoor fan drive circuit 7 Replace outdoor controller circuit board.
U6
(4250)
Power module
1 Outdoor stop valve is closed.
Check abnormality by driving power module 2 Decrease of power supply voltage
in case overcurrent is detected.
3 Looseness, disconnection or
(UF or UP error condition)
converse of compressor wiring
connection
4 Defective compressor
5 Defective outdoor power circuit
board
33
1 Open stop valve.
2 Check facility of power supply.
3 Correct the wiring (U·V·W phase) to compressor. Refer to 11-9 (Outdoor power circuit
board).
4 Check compressor referring to 11-6.
5 Replace outdoor power circuit board.
Error Code
U8
(4400)
Abnormal points and detection method
Case
1 Check or replace the DC fan motor.
1 Decrease of power supply voltage
2 Disconnection of compressor
wiring
Abnormal if any of followings are detected 3 Defective noise filter circuit
during compressor operation;
board
• Decrease of DC bus voltage to 310V
4 Disconnection or loose connec• Instantaneous decrease of DC bus volttion of CN52C
age to 200V
5 Defective ACT module
• Increase of DC bus voltage to 400V
6 Defective ACT module drive circuit
• Decrease of input current of outdoor unit
of outdoor power circuit board
to 0.5A only if operation frequency is
7 Disconnection or loose connecmore than or equal to 40Hz or comprestion of CNAF
sor current is more than or equal to 5A.
8 Defective 52C drive circuit of
outdoor controller circuit board
9 Disconnection or loose
connection of CN5 on the
outdoor power circuit board
0 Disconnection or loose
connection of CN2 on the
outdoor power circuit board
1 Check the facility of power supply.
2 Correct the wiring (U·V·W phase) to compressor.
Refer to 11-9 (Outdoor power circuit board).
3 Replace noise filter circuit board.
Overvoltage or voltage shortage and
synchronous signal to main circuit
U9
(4220)
Judgment and action
Outdoor fan motor
1 Failure in the operation of
Abnormal if rotational frequency of the fan
the DC fan motor
motor is not detected during DC fan motor 2 Failure in the outdoor circuit
operation.
controller board
Fan motor rotational frequency is abnormal if;
• Less than 100 rpm detected continuously
for 15 seconds at 20: or more outside
air temperature
• Less than 50 rpm or more than 1500 rpm
detected continuously for 1 minute.
2 Check the voltage of the outdoor circuit
controller board during operation.
3 Replace the outdoor circuit controller
board. (when the failure is still indicated
even after performing the remedy 1
above.)
4 Check CN52C wiring.
5 Replace ACT module.
6 Replace outdoor power circuit board.
7 Check CNAF wiring.
8 Replace outdoor controller circuit board.
9 Check CN5 wiring on the outdoor power
circuit board.
Refer to 11-9.
0 Check CN2 wiring on the outdoor power
circuit board.
Refer to 11-9.
1 Defective outdoor fan (fan
motor) or short cycle of outdoor
unit during cooling operation.
2 Defective outdoor pipe
thermistor (TH3)
3 Defective outdoor controller board
1 Check outdoor unit air passage.
Ud
(1504)
Overheat protection
Abnormal if outdoor pipe thermistor (TH3)
detects 70: or more during compressor
operation.
UF
(4100)
Compressor overcurrent interruption
(When compressor locked)
Abnormal if overcurrent of DC bus or
compressor is detected within 30 seconds
after compressor starts operating.
1 Stop valve is closed.
2 Decrease of power supply voltage
3 Looseness, disconnection or
converse of compressor wiring
connection
4 Defective compressor
1 Open stop valve.
2 Check facility of power supply.
3 Correct the wiring (U·V·W phase) to
compressor.
Refer to 11-9 (Outdoor power circuit board).
4 Check compressor.
Refer to 11-6.
5 Replace outdoor power circuit board.
5 Defective outdoor power board
UH
(5300)
UL
(1300)
Compressor current sensor error or
input current error
Abnormal if compressor current sensor
detects –1.5A to 1.5A during compressor
operation. (This error is ignored in case of
test run mode.)
Abnormal if the input current of 38A is
detected or the input current of 34A or
more is detected for 10 seconds.
1 Disconnection of compressor
wiring
2 Defective circuit of current
sensor on outdoor power
circuit board
23 Turn the power off and on again to check
the error code. If U4 is displayed, follow the
U4 processing direction.
1 Correct the wiring (U·V·W phase) to
compressor. Refer to 11-9 (Outdoor power
circuit board).
2 Replace outdoor power circuit board.
Low pressure
1 Check stop valve.
1 Stop valve of outdoor unit is
Abnormal if the following conditions are
closed during operation.
detected for 3 minutes continuously after
2 Leakage or shortage of refriger2 Check intake super heat.
compressor starts heating operation for 10
ant
Check leakage of refrigerant.
minutes.
Charge additional refrigerant.
(However, this abnormal detection is disre3 Check linear expansion valve.
garded when the compressor driving time 3 Malfunction of linear expansion
Refer to 11-6.
exceeds 30 minutes after power is on.)
valve
TH7-TH3[4:
TH5-Indoor room temperature[2:
Thermistor TH3:Outdoor liquid pipe temperature
TH5:Indoor cond./eva. Temperature
TH7:Outdoor temperature
* In case of UL error, the compressor may be
damaged if the unit is restarted by remote
controller. To avoid the damage, unit has
the system that is not able to be restarted
unless the power is turned OFF once. .
34
Error Code
UP
(4210)
Abnormal points and detection method
Compressor overcurrent interruption
1 Stop valve of outdoor unit is
Abnormal if overcurrent DC bus or comclosed.
pressor is detected after compressor starts 2 Decrease of power supply voltoperating for 30 seconds.
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 outdoor controller board
7 Defective compressor
Remote controller transmission
error(E0)/signal receiving error(E4)
1 Abnormal if main or sub remote controller cannot receive any transmission
normally 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)
E0
or
E4
E1
or
E2
Case
1 Abnormal if indoor controller board
cannot 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 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 Mis-wiring of remote controller
4 Defective transmitting receiving
circuit of remote controller
5 Defective transmitting receiving circuit of indoor controller
board of refrigerant address “0”
6 Noise has entered into the
transmission wire of remote
controller.
Remote controller control board
1 Defective remote controller
1 Abnormal if data cannot be read normally 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)
35
Judgment and action
1 Open stop valve.
2 Check facility of power supply.
3 Correct the wiring (U·V·W phase) to
compressor. Refer to 11-9 (Outdoor power
circuit board).
4 Check indoor/outdoor fan.
5 Solve short cycle.
6 Replace outdoor controller circuit board.
7 Check compressor.
Refer to 11-6.
W Before the replacement of the outdoor controller 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
(Do not use cablex 3 or more.)
• The number of connecting indoor units:
max. 16units
• The number of connecting remote controller: max. 2units
When it is not the above-mentioned problem of
1~3
4 Diagnose remote controllers.
a) When “RC OK” is displayed, remote controllers have no problem.
Turn the power off, and on again to check.
If abnormality generates again, replace
indoor controller board.
b) When “RC NG” is displayed,
replace remote controller.
c)When “RC E3”or “ERC 00-66”is displayed,
noise may be causing abnormality.
* If the unit is not normal after replacing
indoor controller board in group control,
indoor controller board of address “0” may
be abnormal.
1 Replace remote controller.
Error Code
E3
or
E5
E8
(6840)
E9
(6841)
EF
(6607
or
6608)
Abnormal points and detection method
Remote controller transmission
error(E3)/signal receiving error(E5)
1 Abnormal if remote controller could not
find blank of transmission path for 6 seconds and could not transmit.
(Error code: E3)
2 Remote controller receives transmitted
data at the same time and compares the
received and transmitted data. Abnormal
if these data are judged to be different
30 continuous times. (Error code: E3)
Case
1 2 remote controllers are set as
“main.”
(In case of 2 remote controllers)
2 Remote controller is connected
with 2 indoor units or more.
3 Repetition of refrigerant
address
4 Defective transmitting receiving
circuit of remote controller
1 Abnormal if indoor controller board could 5 Defective transmitting receivnot find blank of transmission path.
ing circuit of indoor controller
(Error code: E5)
board
2 Indoor controller board receives trans6 Noise has entered into transmitted data at the same time and commission wire of remote controlpares the received and transmitted data.
ler.
Abnormal if these data are judged to
be different 30 continuous times. (Error
code: E5)
Judgment and action
1 Set a remote controller to main, and the
other to sub.
2 Connect remote controller with only one
indoor unit.
3 Change the address to a separate setting.
4~6 Diagnose remote controller.
a) When “RC OK” is displayed, remote controllers have no problem.
Turn the power off, and on again to check.
When becoming abnormal again, replace
indoor controller board.
b)When “RC NG” is displayed, replace
remote controller.
c)When “RC E3” or “ERC 00-66” is displayed, noise may be causing abnormality.
Indoor/outdoor unit communication
error (Signal receiving error)
(Outdoor unit)
(1) Abnormal if outdoor controller circuit
board could not receive anything
normally for 3 minutes.
1 Contact failure of indoor/out1 Check disconnection or looseness of indoor/
door unit connecting wire
outdoor unit connecting wire of indoor or out2 Defective communication circuit
door units.
of outdoor controller circuit board 2~4 Turn the power off, and on again to
3 Defective communication circuit
check. Replace indoor controller board or
of indoor controller board
outdoor controller circuit board if abnormal4 Noise has entered into indoor/
ity is displayed again.
outdoor unit connecting wire.
Indoor/outdoor unit communication
error (Transmitting error) (Outdoor unit)
(1) Abnormal if “0” receiving is detected 30
times continuously though outdoor controller circuit board has transmitted “1”.
(2) Abnormal if outdoor controller circuit
board could not find blank of transmission
path for three minutes.
1 Indoor/ outdoor unit connecting 1 Check disconnection or looseness of indoor/
wire has contact failure.
outdoor unit connecting wire.
2 Defective communication circuit 2~4 Turn the power off, and on again to
of outdoor controller circuit board
check. Replace outdoor controller circuit
3 Noise has entered power supply.
board if abnormality is displayed again.
4 Noise has entered indoor/ outdoor unit connecting wire.
Non defined error code
This code is displayed when non defined
error code is received.
1 Noise has entered transmission 12 Turn the power off, and on again to check.
Replace indoor controller board or outdoor
wire of remote controller.
controller circuit board if abnormality is
2 Noise has entered indoor/ outdisplayed again.
door unit connecting wire.
3 Outdoor unit is not a series of 3 Replace outdoor unit with power-inverter type
outdoor unit.
power-inverter.
4 Model name of remote control- 4 Replace remote controller with MA remote
controller.
ler is PAR-S25A.
Serial communication error
1.Abnormal if serial communication
between outdoor controller circuit
board and outdoor power circuit board
is defective.
12 Check connection of each connector CN2
1 Breaking of wire or contact
and CN4 between the outdoor controller
failure of connector CN2
circuit board and the outdoor power circuit
between the outdoor controller
board.
circuit board and the outdoor
power circuit board
2 Breaking of wire or contact
failure of connector CN4
between the outdoor controller
circuit board and the outdoor
power circuit board
3 Defective communication circuit 3 Replace outdoor power circuit board.
of outdoor power circuit board
4 Defective communication circuit 4 Replace outdoor controller circuit board.
of outdoor controller circuit board
for outdoor power circuit board
2. Abnormal if communication between
outdoor controller circuit board and
M-NET board is not available.
1 Breaking of wire or contact
1 Check disconnection, looseness, or breaking of
connection wire between outdoor controller cirfailure of connector between
cuit board (CNMNT) and M-NET board (CN5).
outdoor controller circuit board
2 Check disconnection, looseness, or breaking
and M-NET board
of connection wire between outdoor controller
2 Contact failure of M-NET board
circuit board(CNMNT) and M-NET board (CND).
power supply line
3 Noise has entered into M-NET 3 Check M-NET transmission wiring method.
transmission wire.
Ed
(0403)
36
Error Code
P8
Abnormal points and detection method
Pipe temperature
1 Slight temperature difference
<Cooling mode>
between indoor room
Detected as abnormal when the pipe
temperature and pipe <liquid
temperature is not in the cooling range 3
or condenser/evaporator>
minutes later of compressor start and 6
temperature thermistor
minutes later of the liquid or condenser/
• Shortage of refrigerant
evaporator pipe is out of cooling range.
• Disconnected holder of pipe
Note 1) It takes at least 9 min. to detect.
<liquid or condenser/
Note 2) Abnormality P8 is not detected in
evaporator> thermistor
drying mode.
• Defective refrigerant circuit
Cooling range : Indoor pipe temperature
2 Converse connection of
(TH2 or TH5) – intake temperature
extension pipe (on plural units
(TH1) [ -3 deg
connection)
TH: Lower temperature between liquid pipe 3 Converse wiring of indoor/
temperature and condenser/
outdoor unit connecting wire
evaporator temperature
(on plural units connection)
4 Defective detection of indoor
<Heating mode>
room temperature and pipe
When 10 seconds have passed after the
<condenser/evaporator>
compressor starts operation and the hot
temperature thermistor
adjustment mode has finished, the unit is
5 Stop valve is not opened
detected as abnormal when condenser/
completely.
evaporator pipe temperature is not in heating range within 20 minutes.
Note 3) It takes at least 27 minutes to
detect abnormality.
Note 4) It excludes the period of defrosting
(Detection restarts when defrosting
mode is over)
Heating range : 3 deg [ (Condenser/
Evaporator temperature(TH5) –
intake temperature(TH1))
<M-NET communication error>
Error Code
A0
(6600)
A2
(6602)
A3
(6603)
1~4
(
Check pipe <liquid or condenser/
evaporator> temperature with room
temperature display on remote
controller and outdoor controller circuit
board.
Pipe <liquid or condenser/evaporator>
temperature display is indicated by
setting SW2 of outdoor controller circuit
board as follows.
Conduct temperature check with outdoor
controller circuit board after connecting
‘A-Control Service Tool(PAC-SK52ST)’.
)
Temperature display of indoor liquid pipe
Indoor 1
1
2
3
4
5
6
Temperature display of indoor condenser/
evaporator pipe Indoor 1
1
2
3
4
5
6
ON
ON
OFF
OFF
Temperature display of indoor liquid pipe
Indoor 2
1
2
3
4
5
6
Temperature display of indoor condenser/
evaporator pipe Indoor 2
1
2
3
5
6
OFF
OFF
A-Control Service Tool
4
ON
ON
SW2 setting
23Check converse connection of extension
pipe or converse wiring of indoor/outdoor
unit connecting wire.
(Note) “Indoor unit” in the text indicates M-NET board in outdoor unit.
Abnormal points and detection method
Case
Duplicate address definition
1 There are 2 or more same
This error is displayed when transmission
address of controller of outfrom the units of same address is detected.
door unit, indoor unit, FRESH
Note) The address and attribute displayed
MASTER, or LOSSNAY.
at remote controller indicate the con- 2 Noise has entered into transtroller that detected abnormality.
mission signal and signal was
transformed.
Hardware error of transmission
processor
Transmission processor intended to transmit “0”, but “1” appeared on transmission
wire.
Note) The address and attribute display at
remote controller indicate the controller that detected abnormality.
Judgment and action
Case
1 Error is detected if wave form is
Judgment and action
Search the unit with same address as abnormality occurred. If the same address is found, turn off
the power supply of outdoor unit, indoor unit and
FRESH MASTER or LOSSNAY at the same time
for 2 minutes or more after the address is corrected, and turn the power on again.
Check transmission wave form or noise on transmission wire.
1 If the work of transmission wire is done with
transformed when wiring works of
the power on, shut off the power supply of
transmission wire of outdoor unit,
outdoor unit and indoor unit and FRESH
indoor unit, FRESH MASTER or
MASTER or LOSSNAY at the same time for
LOSSNAY are done, or polarity is
2 minutes or more, and turn the power on
changed with the power on and
again.
transmission data collide each other.
2 Defective transmitting receiving
2 Check transmission wave form or noise on
circuit of transmission processor
transmission wire.
3 Transmission data is changed by
the noise on transmission.
BUS BUSY
1 Transmission processor could
not transmit because short cycle
1. Overtime error by signal collision damvoltage of noise and the like
age
have entered into transmission
Abnormal if transmitting is not possible
wire continuously.
for 8-10 minutes continuously because
2 Transmission quantity has
of collision of transmission.
increased and transmission is
2. Data could not reach transmission wire
not possible because there was
for 8-10 minutes continuously because
wiring mistake of terminal block
of noise or etc.
for transmission wire (TB3) and
Note) The address and attribute displayed
terminal block for central control
at remote controller indicate the con(TB7) in outdoor unit.
troller that detected abnormality.
3 Transmission is mixed with
others and occupation rate on
transmission wire rose because
of defective repeater (a function
to connector or disconnect transmission of control and central
control system) of outdoor unit,
then abnormality is detected.
37
1 Check if transmission wire of indoor unit,
FRESH MASTER, LOSSNAY, or remote controller is not connected to terminal block for
central control (TB7) of outdoor unit.
2 Check if transmission wire of indoor unit,
FRESH MASTER or LOSSNAY is not connected to terminal block for transmission wire
of outdoor unit.
3 Check if terminal block for transmission wire
(TB3) and terminal block for central control
(TB7) is not connected.
4 Check transmission wave form or noise on
transmission wire.
Error Code
Abnormal points and detection method
Case
A6
(6606)
Communication error with communication processor
Defective communication between unit
processor and transmission processor
Note) The address and attribute display at
remote controller indicate the controller that detected abnormality.
1 Data of transmission processor or unit processor is not
transmitted normally because
of accidental trouble such as
noise or thunder surge.
2 Address forwarding from unit
processor is not transmitted
normally because of defective
transmission processor hardware.
NO ACK signal
1. Transmitting side controller detects
abnormal if a message was transmitted
but there is no reply (ACK) that a message was received. Transmitting side
detects abnormality every 30 seconds, 6
times continuously.
Note) The address and attribute displayed
at remote controller is indicate the
controller that did not reply (ACK).
Common factor that has no relation with abnormality source
1 The unit of former address
does not exist as address
switch has changed while the
unit was energized.
2 Extinction of transmission wire
voltage and signal is caused by
over-range transmission wire.
• Maximum distance......200m
• Remote controller line...(12m)
3 Extinction of transmission wire
voltage and signal is caused by
type-unmatched transmission
wire.
Type.....
With shield wireCVVS, CPEVS
With normal wire (no shield)VCTF, VCTFK, CVV
CVS, VVR, VVF, VCT
Diameter....1.25mm² or more
A7
(6607)
2. If displayed address or attribute is outdoor unit, indoor unit detects abnormality
when indoor unit transmitted to outdoor
unit and there was no reply (ACK).
3. If displayed address or attribute is indoor
unit, remote controller detects abnormality when remote controller transmitted to
indoor unit and there was no reply (ACK).
Judgment and action
Turn off the power supply of outdoor unit,
indoor unit and FRESH MASTER or
LOSSNAY at the same time for 2 minutes or
more, and turn the power on again. System
returns normally if abnormality was accidental malfunction. If the same abnormality
generates again, abnormality-generated controller may be defective.
Always try the followings when the error
“A7” occurs.
1 Turn off the power supply of outdoor
unit, indoor unit and FRESH MASTER or
LOSSNAY at the same time for 2 minutes or
more, and turn the power on again. If malfunction was accidental, the unit returns to
normal.
2 Check address switch of abnormality-generated address.
3 Check disconnection or looseness of abnormality-generated or abnormality-detected
transmission wire (terminal block and connector)
4 Check if tolerance range of transmission wire
is not exceeded.
5 Check if type of transmission wire is correct
or not.
If there were some troubles of 1-5 above,
repair the defective, then turn off the power
supply of outdoor unit and indoor unit and
4 Extinction of transmission wire FRESH MASTER or LOSSNAY at the same
voltage and signal is caused
time for 2 minutes or more, and turn the power
by over-numbered units.
on again.
5 Accidental malfunction of
abnormality-detected controller • If there was no trouble with 1-5 above in
single refrigerant system (one outdoor unit),
(noise, thunder surge)
controller of displayed address or attribute is
6 Defective of abnormality-gendefective.
erated controller
• If there was no trouble with 1-5 above in different refrigerant system (two or more outdoor
units), judge with 6.
1 Contact failure of transmission
wire of outdoor unit or indoor unit 6 If address of abnormality source is the
2 Disconnection of transmission
address that should not exist, there is the
connector (CN2M) of outdoor unit
unit that memorizes nonexistent address
3 Defective transmitting receiving
information. Delete useless address informacircuit of outdoor unit or indoor
tion with manual setting function of remote
unit
controller.
Only the system FRESH MASTER or
LOSSNAY are connected to, or the system
that is equipped with group setting of different refrigerant system.
1 During group operation with
indoor unit of multi- refrigerant
If there was no trouble with 1-6 above, replace
system, if remote controller
the controller board of displayed address or
transmit to indoor unit while
attribute.
outdoor unit power supply of
one refrigerant system is put off If the unit does not return normally, multi-conor within two minutes of restart, troller board of outdoor unit may be defective
(repeater circuit).
abnormality is detected.
2 Contact failure of transmission Replace multi-controller board one by one to
check if the unit returns normally.
wire of remote controller or
indoor unit
3 Disconnection of transmission
connector (CN2M) of indoor unit
4 Defective transmitting receiving
circuit of indoor unit or remote
controller
Continued to the next page.
38
From the previous page.
Error Code
Abnormal points and detection method
Case
Judgment and action
Same as mentioned in “A7” of the previous
4. If displayed address or attribute is
1 During group operation with
indoor unit of multi- refrigerant page
remote controller, indoor unit detects
system, if indoor unit transmit
abnormality when indoor unit transmitted
to remote controller while outto remote controller and there was no
door unit power supply of one
reply (ACK).
refrigerant system is turned off
or within two minutes of restart,
abnormality is detected.
2 Contact failure of transmission
wire of remote controller or
indoor unit
3 Disconnection of transmission
connector (CN2M) of indoor
unit
4 Defective transmitting receiving
circuit of indoor unit or remote
controller
A7
(6607)
5. If displayed address or attribute is
1 During sequential operation
of indoor unit and FRESH
FRESH MASTER, indoor unit detects
MASTER of other refrigerant
abnormality when indoor unit transmitted
system, if indoor unit transmits
to FRESH MASTER and there was no
to FRESH MASTER while
reply (ACK).
outdoor unit power supply of
same refrigerant system with
FRESH MASTER is turned off
or within 2 minutes of restart,
abnormality is detected.
2 Contact failure of transmission
wire of indoor unit or FRESH
MASTER
3 Disconnection of transmission
connector (CN2M) of indoor
unit or FRESH MASTER
4 Defective transmitting receiving
circuit of indoor unit or FRESH
MASTER
6. If displayed address or attribute is
1 If the power supply of
LOSSNAY is off, indoor unit
LOSSNAY, indoor unit detects abnordetects abnormality when it
mality when indoor unit transmitted to
transmits to LOSSNAY.
LOSSNAY and there was no reply (ACK).
2 During sequential operation
of indoor unit and LOSSNAY
of other refrigerant system,
if indoor unit transmits to
LOSSNAY while outdoor unit
power supply of same refrigerant system with LOSSNAY
is turned off or within 2 minutes of restart, abnormality is
detected.
3 Contact failure of transmission wire of indoor unit of
LOSSNAY
4 Disconnection of transmission
connector (CN2M) of indoor
unit
5 Defective transmitting receiving circuit of indoor unit or
LOSSNAY
7. When displayed address or attribute is
nonexistent
1 The unit of former address
does not exist as address
switch has changed while the
unit was energized.
2 Abnormality is detected
when indoor unit transmitted because the address
of FRESH MASTER and
LOSSNAY are changed after
sequential operation of FRESH
MASTER and LOSSNAY by
remote controller.
39
Error Code
Abnormal points and detection method
M-NET NO RESPONSE
Abnormal if a message was transmitted
and there was reply (ACK) that message
was received, but response command
does not return. Transmitting side detects
abnormality every 30 seconds, 6 times
continuously.
Note) The address and attribute displayed
at remote controller is indicate the
controller that did not reply (ACK).
A8
(6608)
Case
Judgment and action
1 Transmitting condition repeats
fault because of noise and the
like.
2 Extension of transmission wire
voltage and signal is caused
by over-range transmission
wire.
• Maximum distance......200m
• Remote controller line...(12m)
3 Extension of transmission wire
voltage and signal is caused
by type-unmatched transmission wire.
Type.....
With shield wireCVVS, CPEVS
With normal wire (no shield)VCTF, VCTFK, CVV
CVS, VVR, VVF, VCT
Diameter.....1.25mm² or more
4 Accidental malfunction of
abnormality-generated controller
1 Check transmission wave form or noise on
transmission wire.
2 Turn off the power supply of outdoor unit
and indoor unit and FRESH MASTER or
LOSSNAY at the same time for 2 minutes or
more, and turn the power on again. If malfunction was accidental, the unit returns to
normal. If the same abnormality generates
again, controller of displayed address and
attribute may be defective.
11-5. TROUBLESHOOTING BY INFERIOR PHENOMENA
Phenomena
1. Remote controller display does not
work.
Factor
1DC12V is not supplied to remote controller.
(Power supply display
is not indicated on LCD.)
2DC12~15V is supplied to remote controller, however,
no display is indicated.
• “PLEASE WAIT” is not displayed.
• “PLEASE WAIT” is displayed.
Countermeasure
1Check LED2 on indoor controller board.
(1) When LED2 is lit.
Check the remote controller wiring for
breaking or contact failure.
(2) When LED2 is blinking.
Check short circuit of remote controller
wiring.
(3) When LED2 is not lit.
Refer to Phenomena No.3 below.
2Check the following.
• Failure of remote controller if “PLEASE
WAIT” is not displayed
• Refer to Phenomena No.2 below if
“PLEASE WAIT” is displayed.
2. “PLEASE WAIT” display is remained 1At longest 2 minutes after the power supply “PLEASE 1Normal operation
on the remote controller.
WAIT” is displayed to start up.
2Self-diagnosis of remote controller
3”PLEASE WAIT” is displayed for 6 min2Communication error between the remote controller
utes at most, in case of indoor/outdoor
and indoor unit
unit communication error. Check LED3 on
3Communication error between the indoor and outdoor
indoor controller board.
unit
(1)When LED3 is not blinking.
4Outdoor unit protection device connector is open.
Check indoor/outdoor connecting wire
for miswiring.(Converse wiring of S1
and S2, or break of S3 wiring.)
(2)When LED3 is blinking.
Indoor/outdoor connecting wire is normal.
4Check LED display on outdoor controller
circuit board. Refer to 11-10.
Check protection device connector (63L
and 63H) for contact failure.
Refer to 11-9.
3. When pressing the remote controller 1After cancelling to select function from the remote
operation switch, the OPERATION
controller, the remote controller operation switch will
display is appeared but it will be
be not accepted for approx. 30 seconds.
turned off soon.
40
1Normal operation
Factor
Phenomena
Countermeasure
4. Even controlling by the wireless
1The pair number settings of the wireless remote
1Check the pair number settings.
remote controller, no beep is heard
controller and indoor controller board are mismatched.
and the unit does not start operating. Operation display is indicated
on wireless remote controller.
5. When operating by the wireless
remote controller, beep sound is
heard, however, unit does not start
operating.
1No operation for 2 minutes at most after the power
1Normal operation
supply ON
2Local remote controller operation is prohibited.
2Normal operation
• Remote controlling adaptor is connected to CN32
on the indoor controller board.
• Local remote controller operation is prohibited
by centralised controller etc. since it is connected to
MELANS.
3Refer to Phenomena No.2 on previous page.
3Check Phenomena No.2 on previous page.
6. Remote controller display works
normally and the unit performs cooling operation, however, the capacity
cannot be fully obtained. (The air
does not cool well.)
1Refrigerant shortage
2Filter clogging
3Heat exchanger clogging
4Air duct short cycle
1• If refrigerant leaks, discharging temperature rises and LEV opening increases.
Inspect leakage by checking the temperature and opening.
• Check pipe connections for gas leakage.
2Open suction grill and check the filter.
Clean the filter by removing dirt or dust on
it.
3• If the filter is clogged, indoor pipe temperature rises and discharging pressure
increases. Check if heat exchanger is
clogged by inspecting discharging pressure.
• Clean the heat exchanger.
4Remove the shield.
7. Remote controller display works
1• Discharging temperature and indoor
1Linear expansion valve fault
normally and the unit performs heatheat exchanger temperature does not
Opening cannot be adjusted well due to linear expaning operation, however, the capacity
rise.
sion valve fault.
cannot be fully obtained.
Inspect the failure by checking discharg2Refrigerant shortage
ing pressure.
3Lack of insulation for refrigerant piping
• Replace linear expansion valve.
4Filter clogging
2• If refrigerant leaks, discharging tempera
5Heat exchanger clogging
ture rises and LEV opening increases.
6Air duct short cycle
Inspect leakage by checking the tem7Bypass circuit of outdoor unit fault
perature and opening.
• Check pipe connections for gas leakage.
3Check the insulation.
4Open suction grill and check the filter.
Clean the filter by removing dirt or dust on
it.
5• If the filter is clogged, indoor pipe temperature rises and discharging pressure
increases. Check if heat exchanger is
clogged by inspecting discharging pressure.
• Clean the heat exchanger.
6Remove the shield.
7Check refrigerant system during operation.
12Normal operation
8. 1For 3 minutes after temperature
(For protection of compressor)
adjuster turns off, the compressor
will not start operating even if
temperature adjuster is turned on.
2For 3 minutes after temperature
adjuster turns on, the compressor
will not stop operating even if
temperature adjuster is turned off.
(Compressor stops operating
immediately when turning off by
the remote controller.)
41
12Normal operation
Symptoms: “PLEASE WAIT” is kept being displayed on the remote controller.
Diagnosis flow
Cause
Inspection method and
troubleshooting
Check the display time of “PLEASE WAIT”
after turning on the main power.
6 minutes
or more
How long is “PLEASE WAIT”
kept being displayed on the
remote controller?
2 minutes
or less
2 to 6
minutes
Are any error codes
displayed on the
remote controller?
Check the LED display of the
outdoor controller circuit board.
Are any error codes
displayed on the LED?
• “PLEASE WAIT”
• Normal.
will be displayed
The start-up diagnosis will
during the start-up
be over in around 2 minutes.
diagnosis after turning
on the main power.
NO
YES
YES
• Mis-wiring of indoor/
outdoor connecting
wire
• Breaking of indoor/
outdoor connecting
wire (S3)
• Defective indoor
controller board
• Defective outdoor
controller circuit
board
NO
• Defective indoor
controller board
• Defective remote
controller
42
• Refer to “Self-diagnosis
action table” in order to
solve the trouble.
• In case of communication
errors, the display of
remote controller may not
match the LED display of
the outdoor unit.
Symptoms: Nothing is displayed on the remote controller Diagnosis flow
Cause
LED display of the indoor
controller board
LED1 :
LED2 :
LED3 :
Inspection method and
troubleshooting
Check the voltage between S1
and S2 on the terminal block
(TB4) of the indoor unit which
is used to connect the indoor
unit and the outdoor unit.
AC 198V to AC 264V?
YES
NO
Check the voltage among L(L3) and
N on the terminal block (TB1) of the
outdoor power circuit board.
AC 198V to AC 264V?
NO
• Troubles concerning
power supply
• Check the power wiring
to the outdoor unit.
• Check the breaker.
YES
Check the voltage between S1
and S2 on the terminal block
(TB1) of the outdoor unit which
is used to connect the indoor
unit and the outdoor unit.
AC 198V to AC 264V?
NO
Check the voltage of indoor
controller board (CN2D).
• Bad wiring of the
• Check the wiring of the
outdoor controller board outdoor unit.
• The fuses on the outdoor • Check if the wiring is bad.
controller circuit board are Check if the fuses are blown.
blown.
The fuses on the outdoor
controller circuit board will
be blown when the indoor
/outdoor connecting wire
short-circuits.
DC 12V to DC 16V?
• Bad wiring of the
• Check if miswiring, breaking
outdoor controller board or poor contact is causing this
• The fuses on the outdoor problem. Indoor/outdoor
controller circuit board are connecting wire is polarized
blown.
3-core type. Connect the
YES
YES
NO
indoor unit and the outdoor
unit by wiring each pair of
S1, S2 and S3 on the both
side of indoor/outdoor
terminal blocks.
Check the voltage of the unit after
removing the indoor power board
(CN2S).
DC 12V to DC 16V?
• Defective indoor
controller board
YES
• Replace the indoor
controller board.
• Miswiring, breaking
• Check if there is miswiring
or poor connection of or breaking of wire.
indoor/outdoor
connecting wire
NO
• Defective indoor
power board
43
• Replace the indoor
power board.
Symptoms: Nothing is displayed on the remote controller Diagnosis flow
Cause
LED display of the indoor
controller board
LED1 :
LED2 :
LED3 :
or
Inspection method and
troubleshooting
Check the voltage between S1 and S2 on the terminal block (TB4)
of the indoor unit which is used to connect the indoor unit and the
outdoor unit.
NO
AC 198V to AC 264V?
YES
Not lighting.
Check the status
of the indoor controller
board LED3 display.
Check the looseness or disconnection
of the indoor/outdoor connecting wire.
Blinking.
Are there looseness or
disconnection of the indoor/
outdoor connecting wire?
YES
NO
• Breaking or poor contact • Fix the breaking or poor
of the indoor/outdoor contact of the indoor/outdoor
connecting wire
connecting wire.
Check the refrigerant address of
the outdoor unit. (SW1-3 to 1-6)
NO
Is the refrigerant
address “0”?
YES
Check the LED display of the
outdoor unit after turning on the
main power again.
Not displayed.
Is anything displayed?
Displayed.
Is “EA” or “Eb”
displayed?
• Normal
Only the unit which
has the refrigerant
address “0” supplies
power to the remote
controller.
• Set the refrigerant
address to “0”. In case of
the multiple grouping
system, recheck the
refrigerant address again.
• Defective outdoor
controller circuit
board
• Replace the outdoor
controller circuit board.
• Defective outdoor
controller circuit
board
• Replace the outdoor
controller circuit board.
• Defective indoor
controller board
• Replace the indoor controller
board of the indoor unit which
does not operate.
NO
YES
Is “E8” displayed?
YES
NO
Can the unit be restarted?
NO
Can all the indoor
unit be operated?
Check the voltage between S2
and S3 on the terminal block of
the outdoor unit.
DC 17V to DC 28V?
YES
• Influence of
• Not abnormal.
electromagnetic noise There may be the influence
of electromagnetic noise.
Check the transmission wire
and get rid of the causes.
NO
YES
44
• Defective outdoor
power circuit board
• Replace the outdoor
power circuit board.
• Defective indoor
power board
• Replace the indoor
power board.
Symptoms: Nothing is displayed on the remote controller Diagnosis flow
Cause
LED display of the indoor
controller board
LED1 :
LED2 :
or
LED3 : —
Inspection method and
troubleshooting
Check the voltage of the
terminal block (TB6) of
the remote controller.
DC 10V to DC 16V?
YES
• Defective
remote controller
• Replace the
remote controller.
NO
Check the status
of the LED2.
Lighting
• Breaking or poor
• Check if there is breaking
contact of the remote or poor contact of the
controller wire
remote controller wire.
Check the voltage of the
terminal block (TB5)
connecting the remote
controller wire.
If it is not between DC 10V
and DC16V, the indoor
controller board must be
defective.
Blinking
Check the status of the LED2
after disconnecting the remote
controller wire from the terminal
block (TB5) of the indoor unit.
Check the status
of the LED2.
Lighting
• The remote controller • Check if the remote
wire short-circuits
controller wire is
short-circuited.
Blinking
• Defective indoor
controller board
45
• Replace the indoor
controller board.
• Before repair
Frequent calling from customers
Phone Calls From Customers
How to Respond
Note
Unit does The operating display of remote Check if power is supplied to air conditioner.
not operate
controller does not come on.
Nothing appears on the display unless power is
at all.
supplied.
Unit cannot be restarted for a Wait around 3 minutes to restart unit.
while after it’s stopped.
The air conditioner is in a state of being protected
by the microcomputer’s directive. Once the
compressor is stopped, the unit cannot be
restarted for 3 minutes. This control is also applied
when the unit is turned on and off by remote
controller or thermostat.
Error code appears and blinks Error code will be displayed if any protection
on the display of remote
devices of the air conditioner are actuated.
controller.
What is error code?
Remote
controller
“PLEASE WAIT” is displayed
on the screen.
Wait around 2 minutes.
An automatic startup test will be conducted for
2 minutes when power is supplied to the air
conditioner. “PLEASE WAIT” will be kept being
displayed while that time.
“FILTER” is displayed on the
screen.
This indicates that it is time to clean the air filters.
Clean the air filters. Press the FILTER button on
the remote controller twice to clear “FILTER” from
the display.
See the operation manual that came with the
product for how to clean the filters.
“STANDBY” is displayed on the This is displayed when the unit starts HEAT
screen.
operation, when the thermostat puts the
compressor in operation mode, or when the
outdoor unit ends DEFROST operation and
returns to HEAT operation.
The display will automatically disappear around
10 minutes later.
While “STANDBY” is displayed on the remote
controller, the airflow amount will be restricted
because the indoor unit’s heat exchanger is not
fully heated up. In addition to that, the up/down
vane will be automatically set to horizontal blow
in order to prevent cold air from directly blowing
out to human body. The up/down vane will return
to the setting specified by the remote controller
when “STANDBY” is released.
“DEFROSTING” is displayed on The outdoor unit gets frosted when the outside
the screen. (No air comes out of
temperature is low and the humidity is high.
the unit.)
“DEFROSTING” indicates the DEFROST
operation is being performed to melt this frost. The
DEFROST operation ends in around 10 minutes
(at most 15 minutes).
During the DEFROST operation, the indoor unit’s
heat exchanger becomes cold, so the blower is
stopped. The up/down vane will be automatically
set to horizontal blow in order to prevent cold air
from directly blowing out to human body. The
display will turn into “STANDBY” when DEFROST
operation ends.
46
Refer to “SELF-DIAGNOSIS
ACTION TABLE”.
Check if servicing is
required for the error.
Display time of “FILTER”
depends on the model.
Long life filter: 2500 hrs.
Regular filter: 100 hrs.
Phone Calls From Customers
How to Respond
The room cannot be cooled or heated sufficiently. Check the set temperature of remote controller.
The outdoor unit cannot be operated if the set
temperature is not appropriate.
The outdoor unit operates in the following modes.
COOL: When the set temperature is lower
than the room temperature.
HEAT: When the set temperature is higher
than the room temperature.
Note
Check if filters are not dirty and clogged. If filters
are clogged, the airflow amount will be reduced
and the unit capacity will be lowered. See the
instruction manual that came with the product for
how to clean the filters.
Check there is enough space around the air
conditioner.
If there are any obstacles in the air intake or air
outlet of indoor/outdoor units, they block the
airflow direction so that the unit capacity will be
lowered.
An gas escaping sound is heard This is not a malfunction.
Sound
comes out
sometimes.
This is the sound which is heard when the flow of
from the air
refrigerant in the air conditioner is switched.
conditioner. A cracking sound is heard
This is not a malfunction.
sometimes.
This is the sound which is heard when internal
parts of units expand or contract when the
temperature changes.
A buzzing sound is heard
This is not a malfunction.
sometimes.
This is the sound which is heard when the outdoor
unit starts operating.
A ticking sound is heard from
the outdoor unit sometimes.
This is not a malfunction.
This is the sound which is heard when the blower
of the outdoor unit is controlling the airflow amount
in order to keep the optimum operating condition.
A sound, similar to water
flowing, is heard from the unit.
This is not a malfunction.
This is the sound which is heard when the
refrigerant is flowing inside the indoor unit.
Something The fan speed does not match
is wrong
the setting of the remote
with the
controller during DRY
blower…..
operation.(No air comes out
sometimes during DRY
operation.)
This is not a malfunction. During the DRY
operation, the blower’s ON/OFF is controlled by
the microcomputer to prevent overcooling and to
ensure efficient dehumidification. The fan speed
cannot be set by the remote controller during DRY
operation.
The fan speed does not match
the setting of the remote
controller in HEAT operation.
This is not a malfunction.
1) When the HEAT operation starts, to prevent the
unit from blowing cold air, the fan speed is
gradually increased from zero to the set speed,
in proportion to the temperature rise of the
discharged air.
2) When the room temperature reaches the set
temperature and the outdoor unit stops,
the unit starts the LOW AIR operation.
3) During the HEAT operation, the DEFROST operation
is performed to defrost the outdoor unit.
During the DEFROST operation, the blower is stopped
to prevent cold air coming out of the indoor unit.
47
The up/down vane will be
automatically set to
horizontal blow in these
cases listed up on the left
(
~). After a while, the
up/down vane will be
automatically moved
according to the setting of
the remote controller.
Phone Calls From Customers
Something Air blows out for a while after
is wrong
HEAT operation is stopped.
with the
blower…..
How to Respond
Note
However, this control is also
This is not a malfunction.
The blower is operating just for cooling down the applied to the models which
heated-up air conditioner. This will be done within has no electric heater.
one minute.
This control is conducted only when the HEAT
operation is stopped with the electric heater ON.
Something The airflow direction is changed If the up/down vane is set to downward in COOL
is wrong
during COOL operation.
operation, it will be automatically set to horizontal
with the
blow by the microcomputer in order to prevent
airflow
water from dropping down.
direction….
“1 Hr.” will be displayed on the remote controller if
the up/down vane is set to downward with the fan
speed set to be less than “LOW”.
The airflow direction is changed In HEAT operation, the up/down vane is
during HEAT operation.
automatically controlled according to the
temperature of the indoor unit’s heat exchanger.
(The airflow direction cannot be
In the following cases written below, the up/down
set by remote controller.)
vane will be set to horizontal blow, and the setting
cannot be changed by remote controller.
1) At the beginning of the HEAT operation
2) While the outdoor unit is being stopped by
thermostat or when the outdoor unit gets started
to operate.
3) During DEFROST operation
The airflow direction will be back to the setting of
remote controller when the above situations are
released.
“STANDBY” will be displayed
on the remote controller in
case of and .
“DEFROSTING” will be
displayed on the screen in
case of .
The airflow direction does not
1) Check if the vane is set to a fixed position.
change.
(Check if the vane motor connector is removed.)
2)
Check if the air conditioner has a function for
(Up/down vane, left/right louver)
switching the air direction.
3) If the air conditioner does not have that function, “NOT
AVAILABLE” will be displayed on the remote controller
when “AIR DIRECTION” or “LOUVER” button is pressed.
The air conditioner starts operating even though
any buttons on the remote controller are not
pressed.
Check if you set ON/OFF timer.
The air conditioner starts operating at the time
designated if ON timer has been set before.
Check if any operations are ordered by distant
control system or the central remote controller.
While “CENTRALLY CONTROLLED INDICATOR”
is displayed on the remote controller, the air
conditioner is under the control of external directive.
There might be a case that
“CENTRALLY CONTROLLED
INDICATOR” will not be
displayed.
Check if power is recovered from power failure
(black out).
The units will automatically start operating when
power is recovered after power failure (black out)
occurs. This function is called “power failure
automatic recovery ”.
The air conditioner stops even though any
Check if you set ON/OFF timer.
buttons on the remote controller are not pressed.
The air conditioner stops operating at the time
designated if OFF timer has been set before.
Check if any operations are ordered by distant
control system or the central remote controller.
While “CENTRALLY CONTROLLED INDICATOR” is
displayed on the remote controller, the air conditioner is
under the control of external directive.
48
There might be a case that
“CENTRALLY
CONTROLLED INDICATOR”
will not be displayed.
Phone Calls From Customers
How to Respond
A white mist is expelled from the indoor unit.
This is not a malfunction.
This may occur when the operation gets started in
the room of high humidity.
Water or moisture is expelled from the outdoor
unit.
Cooling; when pipes or piping joints are cooled, they
get sweated and water drips down.
Heating; water drips down from the heat exchanger.
* Make use of optional parts “Drain Socket” and
“Drain pan” if these water needs to be collected and
drained out for once.
The display of wireless remote controller gets dim Batteries are being exhausted. Replace them and
or does not come on.
press the reset button of remote controller.
The indoor unit does not receive a signal from
remote controller at a long distance.
49
Note
11-6. HOW TO CHECK THE PARTS
PUHZ-P100VHA2.UK
PUHZ-P125VHA2.UK
PUHZ-P140VHA21.UK
PUHZ-P125VHA21.UK
PUHZ-P100VHA3.UK
PUHZ-P125VHA3.UK
PUHZ-P100VHA3R1.UK
PUHZ-P125VHA3R1.UK
PUHZ-P140VHA2.UK
PUHZ-P140VHA3.UK
PUHZ-P140VHA3R1.UK
Check points
Parts name
Thermistor (TH3)
Disconnect the connector then measure the resistance with a tester.
<Outdoor pipe>
(At the ambient temperature 10~30)
Thermistor (TH4)
<Discharge>
Normal
Abnormal
Thermistor (TH6)
TH4
160k~410k
<Outdoor 2-phase pipe>
TH3
Thermistor (TH7)
<Outdoor>
TH6
4.3k~9.6k
Open or short
TH7
Thermistor (TH8)
<Heatsink>
TH8
39k~105k
Fan motor(MF1,MF2) Refer to next page.
Solenoid valve coil
<Four-way valve>
(21S4)
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20)
Normal
Abnormal
P100, P125/140VHA21, P125/140VHA3
P125/P140VHA2
1500 ± 150
1435 ± 150
Open or short
Motor for compressor Measure the resistance between the terminals with a tester.
(Winding temperature 20)
U
(MC)
Normal
Abnormal
V
P100
P125,P140
W
0.88
0.53
Open or short
Linear expansion valve Disconnect the connector then measure the resistance with a tester.
(LEV-A)
(Winding temperature 20)
M
Gray
Orange
Red
Yellow
Black
1
2
3
4
5
6
Solenoid valve coil
<Bypass valve>
(SV)
For P125, 140
Normal
Gray - Black
Gray - Red
Gray - Yellow
46 ± 3
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20)
Normal
1450 ± 150
Abnormal
Open or short
50
Abnormal
Gray - Orange
Open or short
Check method of DC fan motor (fan motor/outdoor controller circuit board)
Notes
· High voltage is applied to the connecter (CNF1, 2) for the fan motor. Pay attention to the service.
· Do not pull out the connector (CNF1, 2) for the motor with the power supply on.
(It causes trouble of the outdoor controller circuit board and fan motor.)
Self check
Symptom : The outdoor fan cannot turn around.
Fuse check
Check the fuse (F5) on outdoor
controller board.
Did the fuse blow?
Yes
Replace outdoor controller board (C.B)
and fan motor (MF1, 2).
No
Wiring contact check
Contact of fan motor connector (CNF1, 2)
Is there no contact failure?
No
Recover wiring.
Yes
Power supply check (Remove the connector (CNF1, 2))
Measure the voltage in the outdoor controller circuit board.
TEST POINT : VDC (between 1 (+) and 4 (-) of the fan connector): VDC DC250~330V
TEST POINT : VCC (between 5 (+) and 4 (-) of the fan connector): VCC DC15V
Is the voltage normal?
Yes
Yes
No
Check the operation of fan.
Replace outdoor
controller board.
NG
Replace outdoor controller board.
OK
Check the operation.
Replace the fan motor.
END
NG
Replace the fan motor.
51
OK
END
11-7. HOW TO CHECK THE COMPONENTS
<Thermistor feature chart>
50
Low temperature thermistors
• Thermistor <Outdoor pipe> (TH3)
• Thermistor <Outdoor 2-phase pipe> (TH6)
• Thermistor <Outdoor> (TH7)
Resistance (k)
40
Thermistor R0 = 15k' ± 3%
B constant = 3480 ± 2%
1
1
Rt =15exp{3480( 273+t – 273 )}
0:
10:
20:
25:
15k'
9.6k'
6.3k'
5.2k'
30:
40:
4.3k'
3.0k'
30
20
10
0
-20 -10 0 10 20 30 40 50
Temperature ()
200
Medium temperature thermistor
• Thermistor <Heatsink> (TH8)
150
Resistance (k)
Thermistor R50 = 17k' ± 2%
B constant = 4150 ± 3%
1
1
Rt =17exp{4150( 273+t – 323)}
0:
25:
50:
70:
90:
180k'
50k'
17k'
8k'
4k'
100
50
0
25
50
75
100
Temperature ()
125
500
High temperature thermistor
• Thermistor <Discharge> (TH4)
Thermistor R120 = 7.465k' ± 2%
B constant = 4057 ± 2%
400
20: 250k'
30: 160k'
40: 104k'
50: 70k'
60: 48k'
Resistance (k)
1
1
Rt =7.465exp{4057( 273+t – 393)}
70:
34k'
80:
24k'
90: 17.5k'
100: 13.0k'
110: 9.8k'
300
200
100
0
52
25
50
75
Temperature ()
100
120
Linear expansion valve
(1) Operation summary of the linear expansion valve
• Linear expansion valve open/close through stepping motor after receiving the pulse signal from the outdoor controller board.
• Valve position can be changed in proportion to the number of pulse signal.
<Connection between the outdoor controller board and the linear expansion valve>
Outdoor controller board
DC12V
Gray
LEV
1
Drive circuit
3
Orange 3
:4
4
:3
:2
Yellow 5
:2
:1
Black
6
:1
:4
M
2
1
5
4
:3
6
Red
Connector LEV-A
<Output pulse signal and the valve operation>
Output
(Phase)
Output
1
2
3
5
4
6
7
8
:1
ON ON OFF OFF OFF OFF OFF ON
:2
OFF ON
:3
OFF OFF OFF ON ON ON OFF OFF
:4
OFF OFF OFF OFF OFF ON ON ON
ON ON OFF OFF OFF OFF
Opening a valve : 8 → 7 → 6 → 5 → 4 → 3 → 2 → 1 → 8
Closing a valve : 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → 1
The output pulse shifts in above order.
· When linear expansion valve operation stops, all output phase
become OFF.
· When the switch is turned on, 700 pulse closing valve signal
will be sent till it goes to A point in order to define the valve
position.(The pulse signal is being sent for about 20 seconds.)
(2) Linear expansion valve operation
· When the valve moves smoothly, there is no sound or vibration
occurring from the linear expansion valve : however, when the
pulse number moves from B to A or when the valve is locked,
sound can be heard.
No sound is heard when the pulse number moves from B to A
in case coil is burnt out or motor is locked by open-phase.
Valve position (capacity)
· Sound can be detected by placing the ear against the screw
driver handle while putting the screw driver to the linear expansion valve.
Close
Open
500 pulse
Opening a valve
all the way
Pulse number
Extra tightning (about 32 pulse)
53
(3) How to attach and detach the coil of linear expansion valve
<Composition>
Linear expansion valve is separable into the main body and the coil as shown in the diagram below.
Stopper
Main body
Coil
Lead wire
<How to detach the coil>
Hold the lower part of the main body (shown as A) firmly so that
the main body does not move and detach the coil by pulling it
upward.
Be sure to detach the coil holding main body firmly. Otherwise
pipes can bend due to pressure.
A
<How to attach the coil>
Hold the lower part of the main body (shown as A) firmly so that
the main body does not move and attach the coil by inserting it
downward into the main body. Then securely attach the coil stopper to main body. (At this time, be careful that stress is not added
to lead wire and main body is not wound by lead wire.) If the
stopper is not firmly attached to main body, coil may be detached
from the main body and that can cause defective operation of linear expansion valve.
To prevent piping stress, be sure to attach the coil holding the
main body of linear expansion valve firmly. Otherwise pipe may
break.
Be sure to attach
the stopper.
A
54
11-8. EMERGENCY OPERATION
(1) When the error codes shown below are displayed on outdoor unit or microcomputer for wired remote controller or indoor
unit has a failure, but no other problems are found, emergency operation will be available by setting the emergency operation switch (SWE) to ON and short-circuiting the connector (CN31) on outdoor controller board.
LWhen following abnormalities occur, emergency operation will be available.
Error code Inspected content
U4
Open/short of pipe thermistor (TH3/TH6)
E8
Indoor/outdoor unit communication error • Signal receiving error (Outdoor unit)
E9
Indoor/outdoor unit communication error • Transmitting error (Indoor unit)
E0 ~ E7
Ed
Communication error other than outdoor unit
Communicaiton error between outdoor controller board and M-NET board (Serial communication error)
(2) Check the following items and cautions for emergency operation
1 Make sure that there is no abnormality in outdoor unit other than the above abnormalities. (Emergency operation will
not be available when error code other than the above are indicated.)
2 For emergency operation, it is necessary to set the emergency operation switch (SWE) on indoor controller board. Refer
to the electrical wiring diagram of indoor unit for how to set the indoor unit.)
3 During emergency operation, the air-conditioner will continuously be operated by supplying power and stopping it: It can
not be turned on or off by remote control, and temperature control is not possible.
4 Do not perform emergency heating operation for an extended period of time: If the outdoor unit starts defrosting during
this period, cold air will blow out from the indoor unit.
5 Do not perform emergency cooling operation for more than 10 hours: Neglecting this could result in freezing the heat
exchanger in indoor unit.
(3) Emergency operation procedure
1 Turn the main power supply off.
2 Turn on the emergency operation switch (SWE) on indoor controller board.
3 Set the shorting pins of emergency operation connector (CN31) on outdoor controller board to ON.
4 Use SW4-2 on outdoor controller board to set the operation mode (cooling or heating). (SW4-1 is not used.)
CN31
SW4
ON
1
2
Heating
ON
Cooling
OFF
Shorting pins
5 Turning the main power supply on will start the emergency operation.
(4) Releasing emergency operation
1 Turn the main power supply off.
2 Set the emergency operation switch (SWE) on indoor controller board to OFF.
3 Set the shorting pins of emergency operation connector (CN31) on outdoor controller
board to OFF.
4 Set SW4-2 on outdoor controller board as shown in the right.
w If shorting pins are not set on emergency operation connector (CN31), the setting remains OFF.
55
SW4
Heating
ON
1
2
Cooling
(5) Operation data during emergency operation
During emergency operation, no communication is performed with the indoor unit, so the data items needed for operation
are set to the following values:
Operation mode
Operation data
Remarks
COOL
HEAT
Intake temperature (TH1)
27
20.5
Indoor liquid pipe temperature (TH2)
5
45
Indoor 2-phase pipe temperature (TH5)
5
50
Set temperature
25
22
Outdoor fluid pipe temperature (TH3)
45
5
(+1)
Outdoor 2-phase pipe temperature (TH6)
50
5
(+1)
Outdoor air temperature (TH7)
35
5
(+1)
5
5
Discharge superheat (SHd)
30deg
30deg
(+2)
Sub-cool (SC)
5deg
5deg
(+2)
Temperature difference code
(room temperature - set temperature)(Tj)
+1 If the thermistor temperature data is normal (not open/short), that data is loaded into the control as valid data.
When the unit enters emergency operation and TH values are mismatched, set the thermistors to open/short.
And the unit runs emergency operation with the values listed above.
+2 If one thermistor is set to open/short, the value of SHd/SC will be different from the list above.
[Example] When liquid temperature thermistor (TH3) has an open or short circuit.
Thermistor
COOL
HEAT
TH3
45
5
Ta
Tb
TH6
Regard normal figure as effective data.
TH5
5
50
TH2
5
45
Degree of subcooling (SC)
Cooling = TH6- TH3 = Ta -45
Heating = TH5- TH2 = 50 - 45 = 5 deg.
56
11-9. TEST POINT DIAGRAM
Outdoor controller circuit board
PUHZ-P100VHA2.UK
PUHZ-P125VHA21.UK
PUHZ-P100VHA3.UK
PUHZ-P100VHA3R1.UK
PUHZ-P125VHA2.UK
PUHZ-P140VHA21.UK
PUHZ-P125VHA3.UK
PUHZ-P125VHA3R1.UK
SW1
Forced defrost,
detect history
record reset,
refrigerant address
SW7
<CAUTION> CNF1 and CNF2 are high voltage.
Demand control setting
PUHZ-P140VHA2.UK
PUHZ-P140VHA3.UK
PUHZ-P140VHA3R1.UK
CN51
CNDM
1 to 2: Input of low-level sound priority mode
1 to 3: Input of external contact point
External signal output
• Compressor operating signal
• Abnormal signal
SW6
Model select
SW4
Test operation
SWP
pump down
CN4
SW5
Transmission to outdoor power circuit
board (CN4)
Function switch,
model select
SW8
Pipe replace
Wiring replace
CNM
Connect to A control
service tool
SV1/CH
Crankcase heater
(P125, P140 only)
CNMNT
Connect to
M-NET adapter(CN5)
CNVMNT
Connect to
M-NET adapter(CND)
SV2
Bypass valve
(P125, P140 only)
LEV-A
21S4
Linear expansion
valve
Four-way valve
TH4
Thermistor
<Discharge>
TH3
CN2
Thermistor
<Outdoor pipe>
Connect to the outdoor
power circuit board
1-5: Reception from
power circuit board
2-5: Zero cross signal
(0-5V DC)
3,4: Not used
6-5: 16V DC
7-5: 16V DC
TH7/6
Thermistor
<Outdoor/
2-phase pipe>
63H
High pressure
switch
VFG
(Voltage between
right pins of PC5C
and PC5D, pin 3
and pin 4)
(Same as
(CNF17(+)-4(-))
CNAC
2 to 4: Power supply for
outdoor controller circuit
board (220V-240V AC)
1 to 3: Power supply for
indoor and outdoor unit
connection wire
(220-240V AC)
VSP
(Voltage between pins
of C5A, C5B): DC 0V
(when stopped), DC 1–
6.5V
(when operated)
CNF1, CNF2
Connect to the fan motor
1-4: 280V DC
5-4: 15V DC
6-4: 0-6.5V DC
7-4: 15V DC(When stopped)
7.5V DC(When operated)(0V-15V pulse)
CNS
S1-S2: 220-240V AC
CNDC
+ -
280V DC
Communication power supply
(1+, 3-)
D71 Voltage
(Outdoor power board) 24V DC
57
Outdoor noise filter circuit
PUHZ-P100VHA2.UK
PUHZ-P125VHA21.UK
PUHZ-P100VHA3.UK
PUHZ-P100VHA3R1.UK
board
PUHZ-P125VHA2.UK
PUHZ-P140VHA21.UK
PUHZ-P125VHA3.UK
PUHZ-P125VHA3R1.UK
PUHZ-P140VHA2.UK
PUHZ-P125VHA3.UK
PUHZ-P125VHA3R1.UK
CN52C
52C driving signal
(Connect to the outdoor
controller circuit board
(CN52C))
LO, NO
Voltage of 220-240V
AC is output
(Connect to the outdoor
power circuit board
(TABS, TABT))
CNAC1, CNAC2
220-240V AC
(Connect to the
outdoor controller circuit board
(CNAC))
E2
Connect to the earth
CN5
Primary current
(Connect to the
outdoor power
circuit board
(CN5))
EI
Connect to
the earth
LI, NI
Voltage of 220-240V AC is input
(Connect to the terminal block(TB1))
58
Outdoor power circuit board
PUHZ-P100VHA2.UK
PUHZ-P125VHA2.UK
PUHZ-P140VHA2.UK
PUHZ-P125VHA21.UK
PUHZ-P140VHA21.UK
PUHZ-P100VHA3.UK
PUHZ-P125VHA3.UK
PUHZ-P140VHA3.UK
PUHZ-P100VHA3R1.UK
PUHZ-P125VHA3R1.UK
PUHZ-P140VHA3R1.UK
CN2
Connect to the outdoor controller circuit board
(CN2)
1-5:Transmitting signal to the outdoor
controller circuit board (0~5V DC)
2-5:Zero cross signal (0~5V DC)
3,4:18V DC
6-5:16V DC
7-5:16V DC
Brief Check of POWER MODULE
W Usually, they are in a state of being short-circuited if they are broken.
Measure the resistance in the following points (connectors, etc.).
If they are short-circuited, it means that they are broken.
1. Check of diode bridge (DS2, DS3)
TABP1-TABS, TABN1-TABS, TABP1-TABT,TABN1-TABT
2. Check of DIP-IPM
P-U, P-V, P-W, N-U, N-V, N-W
CNAF
Connect to ACTM
DIP-IPM
CNDC
280-380V DC (1+, 3–)
Connect to the outdoor
controller circuit board
TABS/TABT
Connect to
the outdoor
noise filter
circuit board
Voltage
among
phases:
220-240V AC
CN3
Thermistor (TH8)
<Heatsink>
CN5
Detection of primary
current
Connect to the
outdoor noise filter
circuit board (CN5)
TABP1
Connect to
ACTM
CN4
Connect to the
outdoor controller
circuit board (CN4)
TABN1
Connect to
ACTM
TABP2/SC-P2
Connect to ACTM
TABN
Connect to the
smoothing capacitor
CB –
TABP
Connect to the
smoothing capacitor CB +
TABU/V/W
Connect to the compressor (MC)
Voltage among phases:10V~180V AC
59
TABN2
Connect to ACTM
Active filter module
PUHZ-P100VHA2.UK
PUHZ-P125VHA2(1).UK
PUHZ-P140VHA2(1).UK
PUHZ-P100VHA3.UK
PUHZ-P125VHA3.UK
PUHZ-P140VHA3.UK
PUHZ-P100VHA3R1.UK
PUHZ-P125VHA3R1.UK
PUHZ-P140VHA3R1.UK
P
Connect to the
outdoor power circuit board(TABP2)
L1, L2
Connect to the
DCL(Reactor)
N1
Non-connect
Upper
side
Lower
side
N2
Non-connect
+
Connect to
the outdoor
power circuit
board(TABP1)
Connect to the outdoor
power circuit board(TABN1)
Connection and internal circuit diagram
lo
Connect to the outdoor
power circuit board(TABN2)
DCL
L1
ACTM
L2
(+)
P
N1
N2
(- )
Io
Tester check points of Acive filter module
Error condition Normal value (reference)
(–) and Io
(–) and L2
P and L2
P and Io
L2 and Io
open
less than 1"
short
100k" ~ 1M"
open
W1
short
100k" ~ 1M"
open
W1
short
100k" ~ 1M"
open
W1
short
100k" ~ 1M"
open
W1
+
Load
–
Connect to the outdoor power circuit
board(CNAF)
1
: GND
2-1 : 15V DC
3-1 : Control signal
4, 5 : Not used
6-1 : Control signal
Symptom when the unit is in trouble
1 The unit does not operate (can not be switched ON)
1 The breaker operates
1 The unit does not operate (can not be switched ON) 2U9 Abnormal stop (W2)
1 The breaker operates
1 The unit does not operate (can not be switched ON) 2U9 Abnormal stop (W2)
1 The breaker operates
1 The unit does not operate (can not be switched ON) 2U9 Abnormal stop (W2)
1 The breaker operates
1 The unit does not operate (can not be switched ON) 2U9 Abnormal stop (W2)
W1 The symptom when the unit is in open error condition is described to determine open error by tester check.
ON
: Code "20" display
W2 SW2 setting
OFF
1
6
60
11-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS
(1) Function of switches
Type
of Switch No.
switch
1
Compulsory defrosting +1
2
Abnormal history clear
3
Dip
switch
SW1
Action by the switch operation
Function
OFF
Start
Normal
Clear
ON
ON
ON
1 2 3 4 5 6
0
ON
1 2 3 4 5 6
1
ON
1 2 3 4 5 6
2
ON
1 2 3 4 5 6
3
ON
1 2 3 4 5 6
4
1 2 3 4 5 6
5
1 2 3 4 5 6
6
1 2 3 4 5 6
7
ON
5
ON
1 2 3 4 5 6
8
ON
6
SW4
Normal
ON
4
Refrigerant address setting
Effective timing
ON
ON
1 2 3 4 5 6
9
ON
1 2 3 4 5 6
12
ON
1 2 3 4 5 6
10
ON
1 2 3 4 5 6
13
When compressor is working
in heating operation. +
off or operating
When power supply ON
1 2 3 4 5 6
11
ON
1 2 3 4 5 6
14
1 2 3 4 5 6
15
1
Test run
Operating
OFF
2
Test run mode setting
Heating
Cooling
Under suspension
w1 Compulsory defrosting should be done as follows.
1 Change the DIP SW1-1 on the outdoor controller board from OFF to ON.
2 Compulsory defrosting will start by the above operation 1 if these conditions written below are satisfied.
• Heat mode setting
• 10 minutes have passed since compressor started operating or previous compulsory defrosting finished.
• Pipe temperature is less than or equal to 8:.
• Compulsory defrosting will finish if certain conditions are satisfied.
w Compulsory defrosting can be done if above conditions are satisfied when DIP SW1-1 is changed from OFF to ON.
After DIP SW1-1 is changed from OFF to ON, there is no problem if DIP SW1-1 is left ON or changed to OFF again. This
depends on the service conditions.
Type of
Switch
Switch No.
1
2
Power failure
automatic recovery +2
Auto recovery
3,4,5
No function
—
6
model select
1
SW7
+4
SW8
SW9
Push
switch
Action by the switch operation
ON
OFF
—
—
No function
SW5
Dip
switch
Function
SWP
2
Effective timing
—
No auto recovery
When power supply ON
—
—
Refer to next page.
SW7-1
SW7-2
Setting of demand
Power consumption
(Demand switch ON)
OFF
OFF
0% (Operation stop)
control
+3
ON
OFF
50%
OFF
ON
75%
Always
3
Max Hz setting (cooling)
Max Hz(cooling) % 0.8
Normal
Always
4
Max Hz setting (heating)
Max Hz(heating) % 0.8
Normal
5
No function
—
—
Always
—
6
Defrost Hz setting
For high humidity
Normal
1
No function
—
—
Always
—
2
No function
—
—
—
3
No function
—
—
—
1
No function
—
—
—
2
Function switch
Valid
Normal
Always
3,4
No function
—
—
—
Pump down
Start
Normal
Under suspension
w2 ‘Power failure automatic recovery’ can be set by either remote controller or this DIP SW. If one of them is set to ON,
‘Auto recovery’ activates. Please set “Auto recovery” basically by remote controller because not all units have DIP SW.
Please refer to the indoor unit installation manual.
w3 SW7-1,2 are used for demand control. SW7-1,2 are effective only at the demand control.
(Refer to next page : Special function (b))
w4 Please do not use SW7-3~5 ordinarily. Trouble might be caused by the usage condition.
61
(2) Function of connectors and switches
Types
Connector
Switch
Function
Connector
CN31
Emergency operation
SW6-1
SW6-2
SW6-3
SW6-4
SW6-5
SW6-6
SW6-7
SW6-8
SW5-6
SW6
SW5-6
Action by open/short operation
Short
Open
Start
Normal
MODEL
100V
Model select
125V
140V
SW5-6
ON
OFF
ON
OFF
ON
OFF
Effective timing
When power supply ON
SW6
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
ON
OFF
ON
OFF
ON
OFF
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
Special function
(a) Low-level sound priority mode (Local wiring)
Unit enters into Low-level sound priority mode by external signal input setting.
Inputting external signals to the outdoor unit decreases the outdoor unit operation sound 3 to 4 dB lower than that of usual.
Adding a commercial timer or on-off switch contactor setting to the CNDM connector which is optional contactor for demand
input located on the outdoor controller board enables to control compressor operation frequency.
W The performance depends on the load of conditioned outdoor temperature.
How to wire
<Low-level sound priority mode circuit>
Insulate this point securely as
this is not used.
Purchased locally
Relay
supply
Adaptor for external
signal input
(PAC-SC36NA)
Red 3
Brown 2
Orange 1
~ SW1
X
CNDM
X
SW1 : Switch
X : Relay (Contact spec. : DC1mA)
Outdoor unit
controller board
Max. 10 m including local wiring
1) Make the circuit as shown above with Adaptor for external signal input (PAC-SC36NA).
2) Turn SW1 to on for Low-level sound priority mode.
Turn SW1 to off to release Low-level sound priority mode and normal operation.
(b) On demand control (Local wiring)
Demand control is available by external input. In this mode, power consumption is decreased within the range of usual
0~100%.
How to wire
Basically, the wiring is same with (a).
Connect an SW 1 which is procured at field to the between Orange and Red (1 and 3) of the Adaptor for external signal
input (PAC-SC36NA), and insulate the tip of the brown lead wire.
It is possible to set it to the following power consumption (compared with ratings) by setting the SW7-1, 2.
SW7-1
SW7-2
Power consumption
(SW1 on)
OFF
OFF
0% (Operation stop)
ON
OFF
50%
OFF
ON
75%
62
<Display function of inspection for outdoor unit>
The blinking patterns of both LED1 (green) and LED2 (red) indicate the types of abnormality when it occurs. Types of
abnormality can be indicated in details by connecting an optional part ‘A-Control Service Tool (PAC-SK52ST)’ to connector
CNM on outdoor controller board.
[Display]
(1) Normal condition
Unit condition
When the power is turned on
When unit stops
When compressor is warming up
When unit operates
Outdoor controller board
A-Control Service Tool
LED1 (Green)
LED2 (Red)
Error code
Lighted
Lighted
Lighted
Lighted
Lighted
Not lighted
Not lighted
Lighted
00, etc.
08, etc.
C5, H7 etc.
Indication of the display
Alternately blinking display
Operation mode
(2) Abnormal condition
Indication
Outdoor controller board
LED1 (Green) LED2 (Red)
Error
Contents
1 blinking 2 blinking Connector(63H) is open.
Error
code
+1
Inspection method
F5 Check if connector (63H) on the outdoor controller
Detailed
reference
page
P.30
board is not disconnected.
Check continuity of pressure switch (63H) by tester.
2 blinking 1 blinking Miswiring of indoor/outdoor unit conne-
cting wire, excessive number of indoor
units (4 units or more)
Miswiring of indoor/outdoor unit connecting wire (converse wiring or disconnection)
Startup time over
2 blinking Indoor/outdoor unit communication error
(signal receiving error) is detected by indoor unit.
Indoor/outdoor unit communication error
(transmitting error) is detected by indoor
unit.
Indoor/outdoor unit communication error
(signal receiving error) is detected by
outdoor unit.
Indoor/outdoor unit communication error
(transmitting error) is detected by outdoor
unit.
3 blinking Remote controller signal receiving
error is detected by remote controller.
— Check if indoor/outdoor connecting wire is connected correctly. P.31
Check if 4 or more indoor units are connected to outdoor unit. (EA)
— Check if noise entered into indoor/outdoor connecting wire P.31
or power supply.
(Eb)
Re-check error by turning off power, and on again.
P.31
—
(EC)
E6 Check if indoor/outdoor connecting wire is connected correctly. +2
Check if noise entered into indoor/outdoor connecting wire or
power supply.
Check if noise entered into indoor/outdoor controller board.
Re-check error by turning off power, and on again.
E7
+2
P.36
(E8)
—
P.37
(E9)
E0 Check if connecting wire of indoor unit or remote controller P.35
—
is connected correctly.
Remote controller transmitting error
is detected by remote controller.
E3 Check if noise entered into transmission wire of remote
P.36
Remote controller signal receiving
error is detected by indoor unit.
E4
P.35
Remote controller transmitting error
is detected by indoor unit.
E5
4 blinking Error code is not defined.
controller.
Re-check error by turning off power, and on again.
P.36
EF Check if remote controller is MA remote controller(PAR-21MAA).
P.36
Ed Check if connector (CN4) on outdoor controller board and
P.36
A0~A8
P.37~
P.40
Check if noise entered into transmission wire of remote controller.
Check if noise entered into indoor/outdoor connecting wire.
Re-check error by turning off power, and on again.
5 blinking Serial communication error
<Communication between outdoor
controller board and outdoor power
board>
<Communication between outdoor
controller board and M-NET p.c. board>
Communication error of M-NET
system
outdoor power board is not disconnected.
Check if there is poor connection of connector on outdoor
controller board(CNMNT and CNVMNT).
Check M-NET communication signal.
1 Error code is displayed on remote controller.
2 Refer to service manual for indoor unit.
63
Indication
Outdoor controller board
LED1 (Green) LED2 (Red)
Error
Contents
Error
code
+1
3 blinking 1 blinking Abnormality of shell thermostat
U2
and discharging temperature (TH4)
Inspection method
Detailed
reference
page
Check if stop valves are open.
Check if connectors (TH4, LEV-A) on outdoor controller board are not
disconnected.
Check if unit fills with specified amount of refrigerant.
Measure resistance values among terminals on indoor valve and outdoor linear
expansion valve using a tester.
P.32
Check if indoor/outdoor units have a short cycle on their air ducts.
Check if connector (63H) on outdoor controller board is not disconnected.
Check if heat exchanger and filter are not dirty.
Measure resistance values among terminals on linear expansion valve using a
tester.
P.32
2 blinking Abnormal high pressure (High
pressure switch 63H worked.)
U1
3 blinking Abnormality of outdoor fan
motor rotational speed
U8
Protection from overheat operation (TH3)
4 blinking Compressor over current breaking (Start-up locked)
Compressor over current breaking
Abnormality of current sensor (P.B.)
Abnormality of power module
Open/short
of discharge thermistor (TH4)
5 blinking
Open/short of outdoor thermistors
(TH3, TH6, TH7 and TH8)
Ud
UF
UP
UH
U6
U3
U4
6 blinking Abnormality of heatsink
temperature
7 blinking Abnormality of voltage
U5
Check if indoor/outdoor units have a short cycle on their air ducts.
Measure resistance value of outdoor thermistor(TH8).
P.33
U9
Check looseness, disconnection, and converse connection of compressor wiring.
Measure resistance value among terminals on compressor using a tester.
Check the continuity of contactor (52C).
Check if power supply voltage decreases.
Check the wiring of CNAF.
P.34
P1
P2
P9
Check if connectors (CN20, CN21, CN29 and CN44) on indoor controller board
are not disconnected.
Measure resistance value of indoor thermistors.
2
2
2
P4
Check if connector (CN31)(CN4F) on indoor controller board is not disconnected.
Measure resistance value of indoor thermistors.
Measure resistance value among terminals on drain-up machine using a tester.
Check if drain-up machine works.
Check drain function.
2
3 blinking Freezing (cooling)/overheating P6
(heating) protection
Check if indoor unit has a short cycle on its air duct.
Check if heat exchanger and filter is not dirty.
Measure resistance value on indoor and outdoor fan motors.
Check if the inside of refrigerant piping is not clogged.
2
4 blinking Abnormality of pipe
temperature
Check if indoor thermistors (TH2 and TH5) are not disconnected from holder.
Check if stop valve is open.
Check converse connection of extension pipe. (on plural units connection)
Check if indoor/outdoor connecting wire is connected correctly. (on plural units
connection)
2
4 blinking 1 blinking Abnormality of room temperature thermistor (TH1)
Abnormality of pipe temperature thermistor /Liquid (TH2)
Abnormality of pipe temperature
thermistor/Condenser-Evaporator
2 blinking Abnormality of drain sensor (DS)
Float switch (FS) connector open
Indoor drain overflow protection
P5
P8
Check the outdoor fan motor.
Check if the connector of TH3 on outdoor controller board is disconnected.
Check if stop valves are open.
Check looseness, disconnection, and converse connection of compressor wiring.
Measure resistance values among terminals on compressor using a tester.
Check if outdoor unit has a short cycle on its air duct.
Check if connectors (TH3, TH4, TH6 and TH7) on outdoor controller board and connector (CN3) on outdoor power board are not disconnected.
Measure resistance value of outdoor thermistors.
1 Error code displayed on remote controller
2 Refer to service manual for indoor unit.
64
P.34
P.34
P.35
P.34
P.33
P.33
P.33
<Outdoor unit operation monitor function>
[When option part ‘A-Control Service Tool(PAC-SK52ST)’ is connected to outdoor controller board(CNM)]
Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of error code by
controlling DIP SW2 on ‘A-Control Service Tool’.
Operation indicator
SW2 : Indicator change of self diagnosis
SW2 setting
Unit
Explanation for display
Display detail
ON
1 2 3 4 5 6
<Digital indicator LED1 working details>
(Be sure the 1 to 6 in the SW2 are set to OFF.)
1 second
interval
(1) Display when the power supply ON.
When the power supply ON, blinking displays by turns.
Wait for 4 minutes at the longest.
(2) When the display lights. (Normal operation)
1 Operation mode display.
SW2
(Lighting)
ON
LED1
(Initial setting)
1 2 3 4 5 6
The tens digit : Operation mode
Display
Operation Model
The ones digit : Relay output
Warming-up
Display
Compressor Compressor 4-way valve
O
OFF / FAN
C
COOLING / DRY +
H
HEATING
d
DEFROSTING
wC5 is displayed during replacement
operation.
2 Display during error postponement
Postponement code is displayed when
compressor stops due to the work of
protection device.
Postponement code is displayed while
error is being postponed.
(3) When the display blinks
Inspection code is displayed when compressor
0
1
2
3
4
5
6
7
8
A
—
—
—
—
—
—
—
—
ON
ON
—
—
—
—
ON
ON
ON
ON
—
—
Solenoid valve
—
—
ON
ON
—
—
ON
ON
—
ON
stops due to the work of protection devices.
Display Contents to be inspected (During operation)
Display
0
1
2
3
Inspection unit
Outdoor unit
Indoor unit 1
Indoor unit 2
Indoor unit 3
U1
U2
U3
U4
U5
U6
U8
Ud
UF
UH
UL
UP
P1~P8
A0~A7
Abnormal high pressure (63H worked)
Abnormal high discharging temperature, shortage of refrigerant
Open/short circuit of discharging thermistor (TH4)
Open/short of outdoor unit thermistors (TH3, TH6, TH7 and TH8)
Abnormal temperature of heatsink
Abnormality of power module
Abnormality in outdoor fan motor
Overheat protection
Compressor overcurrent interruption (When Comp. locked)
Current sensor error
Abnormal low pressure
Compressor overcurrent interruption
Abnormality of indoor units
Communication error of M-NET system
Display Contents to be inspected (When power is turned on)
F5
E8
E9
EA
Eb
EC
E0~E7
63H connector(yellow) is open.
Indoor/outdoor communication error (Signal receiving error) (Outdoor unit)
Indoor/outdoor communication error (Transmitting error) (Outdoor unit)
Miswiring of indoor/outdoor unit connecting wire, excessive number of indoor units (4 units or more)
Miswiring of indoor/outdoor unit connecting wire(converse wiring or disconnection)
Startup time over
Communication error except for outdoor unit
65
—
ON
—
ON
—
ON
—
ON
—
—
SW2 setting
ON
Explanation for display
Display detail
Pipe temperature/Liquid(TH3)
– 40~90
1 2 3 4 5 6
– 40~90
(When the coil thermistor detects 0: or below, “–”
and temperature are displayed by turns.)
(Example) When -10:;
0.5 secs. 0.5secs. 2 secs.
Unit
:
10
Discharge temperature (TH4)
3~217
ON
1 2 3 4 5 6
ON
3~217
(When the discharge thermistor detects 100: or
more, hundreds digit, tens digit and ones digit are
displayed by turns.)
(Example) When 105:;
0.5 secs. 0.5secs. 2 secs.
1
05
:
Output step of outdoor FAN
0~10
0~10
The number of ON / OFF times of compressor
0~9999
0~9999
(When the number of times is 100 or more,
hundreds digit, tens digit and ones digit are
displayed by turns.)
(Example) When 42500 times (425 ×100 times);
0.5 secs. 0.5secs. 2 secs.
4
25
100 times
0~9999
(When it is 100 hours or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
(Example) When 2450 hours (245 × 10 hours);
0.5 secs. 0.5secs. 2 secs.
2
45
10 hours
Step
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
Compressor integrating operation times
0~9999
1 2 3 4 5 6
ON
Compressor operating current
0~50
0~50
wOmit the figures after the decimal fractions.
Compressor operating frequency
0~255
0~255
(When it is 100Hz or more, hundreds digit, tens
digit and ones digit are displayed by turns.
(Example) When 125Hz;
0.5 secs. 0.5secs. 2 secs.
1
25
Hz
0~480
(When it is 100 pulse or more, hundreds digit, tens
digit and ones digit are displayed by turns.
(Example) When 150 pulse;
0.5 secs. 0.5secs. 2 secs.
1
50
Pulse
A
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
LEV-A opening pulse
0~480
1 2 3 4 5 6
ON
Error postponement code history (1)
of outdoor unit
Postponement code display
Blinking: During postponement
Lighting: Cancellation of postponement
“00” is displayed in case of no postponement.
Operation mode on error occurring
Operation mode of when operation stops due to
error is displayed by setting SW2 like below.
1 2 3 4 5 6
ON
(SW2)
ON
1 2 3 4 5 6
1 2 3 4 5 6
66
Code
display
Code
display
SW2 setting
ON
Explanation for display
Unit
– 40~90
(When the coil thermistor detects 0: or below, “–”
and temperature are displayed by turns.)
(Example) When –15:;
0.5 secs. 0.5secs. 2 secs.
15
:
Compressor temperature (TH4) or
discharge temperature (TH4) on error
occurring
3~217
3~217
(When the temperature is 100: or more, the
hundreds digit, tens digit and ones digit are
displayed by turns.)
(Example) When 130:;
0.5 secs. 0.5secs. 2 secs.
1
30
:
Compressor operating current on error
occurring
0~20
0~20
Display detail
Pipe temperature/Liquid(TH3) on error
occurring
– 40~90
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
A
1 2 3 4 5 6
ON
Error code history (1) (latest)
Alternate display of abnormal unit
number and code
When no error history,
“ 0 ” and “– –” are displayed by turns.
Error code history (2)
Alternate display of error unit number
and code
When no error history,
“ 0 ” and “– –” are displayed by turns.
Thermo ON time
0~999
0~999
(When it is 100 minutes or more, the hundreds digit,
tens digit and ones digit are displayed by turns.)
(Example) When 245 minutes;
0.5 secs. 0.5secs. 2 secs.
2
45
Code
display
1 2 3 4 5 6
ON
Code
display
1 2 3 4 5 6
ON
1 2 3 4 5 6
Test run elapsed time
0~120
Minute
0~120
(When it is 100 minutes or more, the hundreds digit,
tens digit and ones digit are displayed by turns.)
(Example) When 105 minutes;
0.5 secs. 0.5secs. 2 secs.
1
05
Minute
67
SW2 setting
Explanation for display
Display detail
The number of connected indoor units
ON
0~3
(The number of connected indoor units are displayed.)
Unit
Unit
1 2 3 4 5 6
Capacity setting display
Displayed as an outdoor capacity code.
Capacity
P100V
P125V
P140V
ON
1 2 3 4 5 6
Outdoor unit setting information
Single phase / 3 phase
• The ones digit
Setting details
1 2 3 4 5 6
Code
display
• The tens digit (Total display for applied setting)
Setting details
Display details
H·P / Cooling only
ON
Code
20
25
28
0 : H·P
1 : Cooling only
0 : Single phase 2 : 3 phase
Display details
Defrosting switch 0 : Normal
Code
display
1 : For high humidity
(Example) When heat pump, 3 phase and
defrosting (normal) are set up, “20” is
displayed.
ON
Indoor pipe temperature/Liquid (TH2(1))
Indoor 1
– 39~88
– 39~88
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
Indoor pipe temperature/Cond./Eva.
(TH5(1))
Indoor 1
– 39~88
– 39~88
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
Indoor pipe temperature/Liquid (TH2(2))
Indoor 2
– 39~88
– 39~88
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
:
Indoor pipe temperature/Cond./Eva.
(TH5(2))
Indoor 2
– 39~88
– 39~88
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
:
Indoor room temperature (TH1)
8~39
8~39
:
1 2 3 4 5 6
ON
:
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
:
1 2 3 4 5 6
68
SW2 setting
ON
Explanation for display
Display detail
Indoor setting temperature
17~30
Unit
17~30
:
1 2 3 4 5 6
ON
Outdoor pipe temperature/2-phase (TH6) -39~88
(When the temperature is 0: or less, “–” and
-39~88
temperature are displayed by turns.)
:
1 2 3 4 5 6
ON
-39~88
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
Outdoor outside temperature (TH7)
-39~88
:
1 2 3 4 5 6
Outdoor heatsink temperature (TH8)
-40~200
-40~200
(When the temperature is 0: or less, “–” and
temperature are displayed by turns.)
(When the thermistor detects 100: or more,
hundreds digit, tens digit and ones digit are
displayed by turns.)
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
0~255
(When the temperature is 100°C or more, hundreds
digit, tens digit and ones digit are displayed by
turns.)
Discharge superheat. SHd
0~255
Cooling = TH4-TH6
Heating = TH4-TH5
0~130
(When the temperature is 100°C or more, hundreds
digit, tens digit and ones digit are displayed by turns.)
Sub cool. SC
0~130
Cooling = TH6-TH3
Heating = TH5-TH2
0~500
(When it is 100 or more, hundreds digit, tens digit
and ones digit are displayed by turns.)
Input current of outdoor unit
ON
:
°C
°C
0.1 A
1 2 3 4 5 6
ON
0~255
(When it is 100Hz or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
Targeted operation frequency
0~255
Hz
1 2 3 4 5 6
ON
180~370
(When it is 100V or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
DC bus voltage
180~370
V
1 2 3 4 5 6
69
SW2 setting
ON
Explanation for display
Display detail
Capacity save
0~100
When air conditioner is connected to
M-NET and capacity save mode is
demanded, “0”~”100” is displayed.
1 2 3 4 5 6
0~100
(When the capacity is 100% hundreds digit, tens digit
and ones digit are displayed by turns.)
(Example) When 100%;
0.5 secs. 0.5secs. 2 secs.
1
00
Unit
%
When there is no setting
of capacity save “100” is
displayed.
ON
Error postponement code history (2)
of outdoor unit
Postponement code display
Blinking: During postponement
Lighting: Cancellation of postponement
“00” is displayed in case of no postponement.
Error postponement code history (3)
of outdoor unit
Postponement code display
Blinking: During postponement
Lighting: Cancellation of postponement
“00” is displayed in case of no postponement.
1 2 3 4 5 6
ON
Code
display
Code
display
1 2 3 4 5 6
ON
Error code history (3) (Oldest)
Alternate display of abnormal unit
number and code.
When no error history, “0” and “– –“ are displayed by
turns.
Error thermistor display
3:
6:
7:
8:
Code
display
1 2 3 4 5 6
ON
When there is no error thermistor,
“–“ is displayed.
Outdoor
Outdoor
Outdoor
Outdoor
pipe temperature/Liquid (TH3)
pipe temperature/2-phase (TH6)
outside temperature (TH7)
heatsink (TH8)
1 2 3 4 5 6
Operation frequency on error occurring
0~255
ON
1 2 3 4 5 6
Fan step on error occurring
0~10
0~255
(When it is 100Hz or more, hundreds digit, tens digit
and ones digit are displayed by turns.)
(Example) When 125Hz;
0.5 secs. 0.5secs. 2 secs.
1
25
Code
display
Hz
0~10
ON
Step
1 2 3 4 5 6
70
SW2 setting
Display detail
Explanation for display
LEV-A opening pulse on error occurring
0~480
0~480
(When it is 100 pulse or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
(Example) When 130 pulse;
0.5 secs. 0.5secs. 2 secs.
1
30
ON
1 2 3 4 5 6
ON
Indoor room temperature (TH1) on error
occurring
8~39
Unit
Pulse
8~39
:
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
Indoor pipe temperature/Liquid (TH2) on -39~88
error occurring
(When the temperature is 0°C or less, “–” and
-39~88
temperature are displayed by turns.)
(Example) When –15°C;
0.5 secs. 0.5secs. 2 secs.
15
-39~88
(When the temperature is 0°C or less, “–” and
temperature are displayed by turns.)
(Example) When –15°C;
0.5 secs. 0.5secs. 2 secs.
15
Indoor pipe temperature/Cond./Eva.
(TH5) on error occurring
-39~88
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
Outdoor pipe temperature/2-phase (TH6) -39~88
(When the temperature is 0°C or less, “–” and
on error occurring
temperature are displayed by turns.)
-39~88
(Example) When –15°C;
0.5 secs. 0.5secs. 2 secs.
15
Outdoor outside temperature (TH7) on
error occurring
-39~88
1 2 3 4 5 6
Outdoor heatsink temperature (TH8) on
error occurring
-40~200
ON
1 2 3 4 5 6
71
-39~88
(When the temperature is 0°C or less, “–” and
temperature are displayed by turns.)
(Example) When –15°C;
0.5 secs. 0.5secs. 2 secs.
15
-40~200
(When the temperature is 0°C or less, “–” and
temperature are displayed by turns.)
(When the temperature is 100°C or more, hundreds
digit, tens digit and ones digit are displayed by
turns.)
:
:
:
:
:
SW2 setting
Display detail
Explanation for display
Unit
Discharge super heat on error occurring
SHd
0~255
0~255
(When the temperature is 100°C or more, hundreds
digit, tens digit and ones digit are displayed by
turns.)
(Example) When 150°C;
0.5 secs. 0.5secs. 2 secs.
1
50
:
0~130
(When the temperature is 100°C or more, hundreds
digit, tens digit and ones digit are displayed by
turns.)
(Example) When 115°C;
0.5 secs. 0.5secs. 2 secs.
1
15
:
ON
1 2 3 4 5 6
Cooling = TH4-TH6
Heating = TH4-TH5
Sub cool on error occurring. SC
0~130
ON
Cooling = TH6-TH3
Heating = TH5-TH2
1 2 3 4 5 6
Thermo-on time until error stops
0~999
ON
0~999
(When it is 100 minutes or more, hundreds digit, tens
digit and ones digit are displayed by turns.)
(Example) When 415 minutes;
0.5 secs. 0.5secs. 2 secs.
4
1 2 3 4 5 6
ON
Minute
15
Indoor pipe temperature / Liquid
(TH2 (3))
Indoor 3
-39~88
-39~88
(When the temperature is 0°C or less, “–” and
temperature are displayed by turns.)
Indoor pipe temperature / Cond./ Eva.
(TH5 (3))
Indoor 3
-39~88
-39~88
(When the temperature is 0°C or less, “–” and
temperature are displayed by turns.)
:
1 2 3 4 5 6
ON
ON
1 2 3 4 5 6
:
When there is no indoor unit, “00” is displayed.
1 2 3 4 5 6
U9 Error status during the Error
postponement period
Description
Normal
Overvoltage error
Undervoltage error
Input current sensor error
L1-phase open error
Abnormal power synchronous signal
PFC/ACTM errorUndervoltage
Detection point
—
Power circuit board
Controller circuit board
Display
00
01
02
Controller circuit board
04
Power circuit board
08
Check CNAF wiring.
Defective ACTM/ P.B.
20
Display examples for multiple errors:
Overvoltage (01) + Undervoltage (02) = 03
Undervoltage (02) + Power-sync signal error (08) = 0A
72
Code
display
12
FUNCTION SETTING
12-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER
Each function can be set as necessary using the remote controller. The setting of function for each unit can only be done by
the remote controller. Select function available from the table 1.
<Table 1> Function selections
(1) Functions available when setting the unit number to 00 (Select 00 referring to 4 setting the indoor unit number.)
Function
Settings
Power failure
automatic recovery
Indoor temperature
detecting 1
OFF
ON
Average data from each indoor unit
Data from the indoor unit with remote controller
Data from main remote controller
Not supported
Supported (Indoor unit does not intake outdoor air through LOSSNAY)
Supported (Indoor unit intakes outdoor air through LOSSNAY)
240V
220V,230V
2 (Normal)
3
When the compressor operates, the humidifier also operates.
When the fan operates, the humidifier also operates.
Standard
For high humidity
LOSSNAY
connectivity
Power supply
voltage
Frost prevention
temperature
Humidifier control
Change of
defrosting control
Mode No. Setting No.
01
02
03
04
15
16
17
Initial setting
(when sent from the factory)
1
2
1
2
3
1
2
3
1
2
1
2
1
2
1
2
Remarks
The setting is
applied to all
the units in the
same
refrigerant
system.
W1 The functions above are available only when the wired remote controller is used.The functions are not available for floor
standing models.
Meaning of "Function setting"
Mode02: indoor temperature detecting
OUTDOOR
OUTDOOR
INDOOR
REMOTE
(MAIN)
INDOOR
INDOOR
REMOTE
(MAIN)
REMOTE
(SUB)
No. Indoor temperature(ta)=
No.1 Average data of the
Initial ta=(A+B)/2
sensor on all the
setting
indoor units
INDOOR
REMOTE
(SUB)
OUTDOOR
OUTDOOR
INDOOR
INDOOR
REMOTE
(MAIN)
REMOTE
(SUB)
REMOTE
(MAIN)
ta=(A+B)/2
ta=A
ta=A
No.2 The data of the sensor
on the indoor unit that
connected
with remote controller
ta=A
ta=B
ta=A
ta=A
No.3 The data of the sensor
on main remote
controller.
ta=C
ta=C
ta=C
ta=C
*2 Can be set only when the outdoor unit is an inverter type.
73
(2) Functions available when setting the unit number to 01-03 or AL (07 in case of wireless remote controller)
• When setting functions for an indoor unit in an independent system, set the unit number to 01 referring to 4 setting the
indoor unit number of Operating Prodedure.
• When setting functions for a simultaneous- Twin Triple indoor unit system, set the unit number to 01 to 03 for each indoor
unit in case of selecting different functions for each unit referring to 4 setting the indoor unit number of Operating Prodedure.
• When setting the same functions for an entire simultaneous Twin Triple-indoor unit system, set refrigerant address to AL
(07 in case of wireless remote controller) referring to 4 setting the indoor unit number of Operating Prodedure.
Function
Mode Setting 4-Way Ceiling
No. No. cassette concealed
Settings
: Initial setting (Factory setting)
- : Not available
Wall
Ceiling suspended
mounted
PEAD-EA(2)
PLA-BA PEAD-GA PCA-GA(2) PCA-KA PCA-HA
Filter sign
Air flow
(Fan speed)
No.of air outlets
Optional high efficiency
filter
Vane setting
Energy saving air
flow (Heating mode)
Optional humidifier
(PLA only)
Vane differential setting
in heating mode
(cold wind prevention)
Swing
Set temperature in heating
mode (4 deg up) +1
Fan speed during the
heating thermo OFF
Fan speed during the
cooling thermo OFF
Detection of abnormality of
the pipe temperature (P8)
100h
2500h
No filter sign indicator
Quiet
Standard
High ceiling
4 directions
3 directions
2 directions
Not supported
Supported
No vanes (Vane No.3 setting : PLA only)
Vane No.1 setting
Vane No.2 setting
Disabled
Enabled
Not supported
Supported
No.1 setting (TH5: 24-28)
No.2 setting (Standard, TH5:28-32)
No.3 setting (TH5: 32-38)
Not available Swing
PLA-BA
Available
Wave air flow
Available
Not available
Extra low
Stop
Set fan speed
Set fan speed
Stop
Available
Not available
}
07
08
09
10
11
12
13
14
23
24
25
27
28
1
2
3
1
2
3
1
2
3
1
2
1
2
3
1
2
1
2
1
2
3
1
2
1
2
1
2
3
1
2
1
2
-
-
-
-
-
-
-
PKA-GAL
PKA-FAL(2)
-
Floor
standing
PKA-HAL PKA-KAL PSA-GA
-
-
-
w1. PKA-HAL/KAL: 2 deg up
PEAD-RP•JA(L)
Function
Filter sign
External static pressure
External static pressure
Set temperature in heating
mode (4 deg up)
Fan speed during the
heating thermo OFF
Fan speed during the
cooling thermo OFF
Detection of abnormality
of the pipe
Settings
100h
2500h
No filter sign indicator
35/50/70/100/150Pa
35/50/70/100/150Pa
Available
Not available
Extra low
Stop
Set fan speed
Set fan speed
Stop
Available
Not available
Mode Setting
No. No.
07
08
10
24
25
27
28
: Initial setting
(Factory setting)
1
2
3
Refer to the right table
Refer to the right table
1
2
1
2
3
1
2
1
2
74
Setting No.
Initial setting
External static
pressure
Mode No. 08 Mode No. 10 (Factory setting)
35Pa
1
2
50Pa
1
3
70Pa
2
1
100Pa
2
2
150Pa
2
3
12-1-1. Selecting functions using the wired remote controller
First, try to familiarize yourself with the flow of the function selection procedure. In this section, an example of setting the room
temperature detection position is given.
For actual operations, refer to steps to .
Setting number
Refrigerant address
Unit number
Mode number
Modes 01 to 14 can be activated
by pressing buttons and simultaneously, and modes 15 to
28 by pressing buttons and .
The flow of the function selection procedure is shown below.
This example shows how to use the remote controller’s internal sensor.
(Mode No. 2: setting No. 3)
Check the function selection setting.
Switch to function setting mode.
(Press and at the same time
with the remote controller stopped.)
For modes 15 and higher,
press and at the same time.
Specify refrigerant address 00 (outdoor unit)
Specify unit No. 00. (indoor unit)
(Use and .)
Enter the setting.
(Press .)
(Specified indoor unit:
FAN operation)
Select mode No. 02
(room temperature detection position).
Select setting No. 03 (remote controller fixed).
(Use and .)
Enter the setting.
(Press .)
Finished
Example:
Selecting room temperature
detection position
YES
NO
Change refrigerant
address or unit No.
NO
YES
Ending function display
(Press and at the same time.)
The above procedure must be carried out only if changes are necessary.
75
[Operating Procedure]
Check the setting items provided by function selection.
If settings for a mode are changed by function selection, the functions of that mode will be changed accordingly. Check all the current settings according to steps to , fill in the "Check" column in Table 1, and then change them as necessary. For factory settings, refer to the indoor unit's installation manual.
Switch off the remote controller.
Hold down the FILTER (
mode is 15 to 28)and TEST
buttons simultaneously for atleast 2 seconds. FUNCTION
SELECTION will start to flash,
and then the remote controller's display content will change as shown below.
Set the outdoor unit's refrigerant address.
Press the [
CLOCK] buttons (
and
) to select the desired
refrigerant address. The refrigerant address changes from "00" to "15".
(This operation is not possible for single refrigerant systems.)
Refrigerant address
display section
flashed for 2 seconds or "88" flashes in the room temperature display area for 2 seconds, a transmission error may have occurred.
* If the unit stops after FUNCTION
SELECTION
Check to see if there are any sources of noise or interference near the transmission path.
Note
If you have made operational mistakes during this procedure, exit function selection (see step ), and then restart from step .
Set the indoor unit number.
Press the
area.
ON/OFF button so that "- -" flashes in the unit number display
CLOCK] buttons (
and
) to select the unit number
Press the [
of the indoor unit for which you want to perform function selection. The unit
number changes to "00", "01", "02","03",04" and "AL" each time a button is
pressed.
Unit number
display section
* To set modes 01 to 06 or 15 to 22 select unit number "00".
* To set modes 07 to 14 or 23 to 28 carry out as follows:
• To set each indoor unit individually, select " 01" to "04".
• To set all the indoor units collectively, select " AL".
Confirm the refrigerant address and unit number.
Press the MODE button to confirm the refrigerant address and unit
number.
After a while, "- - " will start to flash in the mode number display area.
When the refrigerant address and unit number are confirmed by pressing the
MODE button, the corresponding indoor unit will start fan operation. This
helps you find the location of the indoor unit for which you want to perform function
selection. However, if "00" or "AL" is selected as the unit number, all the indoor
units corresponding to the specified refrigerant address will start fan operation.
Mode number
display section
*
Example) When the refrigerant address is set to 00 and the unit number is 02.
00 refrigerant address
"88" will flash in the room temperature display area if the selected refrigerant
address does not exist in the system.
Furthermore, if "F" appears and flashes in the unit number display area and the
refrigerant address display area also flashes, there are no units that correspond to the selected unit number. In this case, the refrigerant address and unit
number may be incorrect, so repeat steps and to set the correct ones.
Outdoor unit
Indoor unit
Confirm
*
No. 01
No. 02
No. 03
Fan mode
Remote controller
When grouping different refrigerant systems, if an indoor unit other than the
one to which the refrigerant address has been set performs fan operation,
there may be another refrigerant address that is the same as the specified one.
In this case, check the DIP switch of the outdoor unit to see whether such a
refrigerant address exists.
Select the mode number.
TEMP] buttons (
and
) to set the desired mode
Press the [
number.
(Only the selectable mode numbers can be selected.)
Select the setting content for the selected mode.
Press the
MENU button. The currently selected setting number will
flash, so check the currently set content.
Setting number display section
Mode number
display section
Mode number 02 = Indoor tempreture detection
Press the [
number.
Setting number 1 = Indoor unit operating average
Register the settings you have made in steps to .
Press the MODE button. The mode number and setting number will start
to flash and registration starts.
TEMP] buttons (
and
) to select the desired setting
Setting number 3 = Remote controller built-in sensor
The mode number and setting number will stop flashing and remain lit, indicating the
end of registration.
" flashes in the room temperature display area, a transmission error may have occurred.
* If " - - - " is displayed for both the mode number and setting number and "
Check to see if there are any sources of noise or interference near the transmission path.
To make additional settings in the FUNCTION SELECTION screen, repeat the steps through .
Note. After setting the modes 07 through 14, the modes 23 through 28 cannot be set continuously, or vice versa. In this case, after completing the settings for the
modes 07 through 14 or 23 through 28, go to the step 10 to finish setting, and restart setting from the step 1.
At this point, wait for 30 seconds or more before restarting setting. Otherwise, the temperature may indicate “”.
Complete function selection.
Hold down the FILTER (
mode is 15 to 28) and TEST buttons
simultaneously for at least 2 seconds.
After a while, the function selection screen will disappear and the air conditioner OFF screen will reappear.
* Do not operate the remote controller for at least 30 seconds after completing
function selection. (No operations will be accepted even if they are made.)
Note
If a function of an indoor unit is changed by function selection after installation is complete, make sure that a " " mark, etc., is given in the "Check" column of Table
1 to indicate the change.
76
12-1-2. Selecting functions using the wireless remote controller (Type C)
Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refrigerant system with wireless function. Refrigerant address cannot be specified by the wireless remote controller.
[Flow of function selection procedure]
The flow of the function selection procedure is shown below. This example shows how to turn off
the function that raises the set temperature by 4 degrees during HEAT operation. (Mode 24: 2)
The procedure is given after the flow chart.
Check the function selection setting.
CHECK
Switch to function selection mode.
(Enter address "50"
in check mode,
h
then press the
button.)
TEMP
ON/OFF
MODE
Specify unit No. "01" (since the function applies to unit 01).
(Set address "01" while still in check mode, then press the
Note: You cannot specify the refrigerant address.
FAN
AUTO STOP
VANE
AUTO START
CHECK LOUVER
h
min
TEST RUN
SET
Check mode is the mode entered when
you press the CHECK button twice to display
"CHECK".
RESET
CLOCK
min
Select mode No. "24" (function that raises set temperature byh 4 degrees during HEAT operation).
(Set address "24" while still in check mode, then press the
button.)
Select setting No. "02" (OFF).
(Set address "02" while still in check mode, then press the
Finished
h
button.)
NO
YES
Change
unit No.
button.)
NO
YES
End function selection mode. Note: When you switch to function selection mode
on the wireless remote controller's operation
(End check mode.)
area, the unit ends function selection mode
automatically if nothing is input for 10 minutes
or longer.
[Operating instructions]
1 Check the function settings.
CHECK
2 Press the
button twice continuously. → CHECK is lit and “00” blinks.
Press the temp
button once to set “50”. Direct the wireless remote controller toward the receiver of the indoor unit and press
h
the
button.
3 Set the unit number.
Press the temp
button to set the unit number. (Press “01” to specify the indoor unit whose
unit number is 01.)
min
Direct the wireless remote controller toward the receiver of the indoor unit and press the
button.
min
By setting unit number with the
button, specified indoor unit starts performing fan operation.
Detect which unit is assigned to which number using this function. If unit number is set to AL, all the indoor units in same
refrigerant system start performing fan operation simultaneously.
* If a unit number that cannot be recognized by the unit is entered, 3 beeps of 0.4 seconds will be heard. Reenter the unit number
setting.
* If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the unit number
setting.
4 Select a mode.
Press the temp
button to set a mode. Press “24” to turn on the function that raises the set temperature by 4 degree
h
during heat operation. Direct the wireless remote controller toward the sensor of the indoor unit and press the
button.
→ The sensor-operation indicator will flash and beeps will be heard to indicate the current setting number.
Current setting number: 1 = 1 beep (1 second)
2 = 2 beeps (1 second each)
3 = 3 beeps (1 second each)
* If a mode number that cannot be recognized by the unit is entered, 3 beeps of 0.4 seconds will be heard. Reenter the mode
number.
* If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the mode
number.
5 Select the setting number.
Press the temp
button to select the setting number. (02: Not available)
h
Direct the wireless remote controller toward the receiver of the indoor unit and press the
button.
→ The sensor-operation indicator will flash and beeps will be heard to indicate the the setting number.
Setting number: 1 = 2 beeps (0.4 seconds each)
2 = 2 beeps (0.4 seconds each, repeated twice)
3 = 2 beeps (0.4 seconds each, repeated 3 times)
* If a setting number that cannot be recognized by the unit is entered, the setting will turn back to the original setting.
* If the signal was not received by the sensor, you will not hear a beep or a “double beep” may be heard. Reenter the setting number.
6 Repeat steps 4 and 5 to make an additional setting without changing unit number.
7 Repeat steps 3 to 5 to change unit number and make function settings on it.
8 Complete the function settings
Press
button.
* Do not use the wireless remote controller for 30 seconds after completing the function setting.
77
12-2. FUNCTION SELECTION OF REMOTE CONTROLLER
The setting of the following remote controller functions can be changed using the remote controller function selection mode.
Change the setting when needed.
Item 1
Item 2
1.Change Language
Language setting to display
("CHANGE LANGUAGE")
2.Function limit
(1) Operation function limit setting (operation lock) ("LOCKING FUNCTION")
("FUNCTION SELECTION") (2) Use of automatic mode setting ("SELECT AUTO MODE")
(3) Temperature range limit setting ("LIMIT TEMP FUNCTION")
3.Mode selection
(1) Remote controller main/sub setting ("CONTROLLER MAIN/SUB")
("MODE SELECTION")
(2) Use of clock setting ("CLOCK")
(3) Timer function setting ("WEEKLY TIMER")
(4) Contact number setting for error situation ("CALL.")
(1) Temperature display /°F setting ("TEMP MODE /°F")
4.Display change
("DISP MODE SETTING") (2) Room air temperature display setting ("ROOM TEMP DISP SELECT")
(3) Automatic cooling/heating display setting ("AUTO MODE DISP C/H")
Item 3 (Setting content)
• Display in multiple languages is possible.
• Setting the range of operation limit (operation lock)
• Setting the use or non-use of "automatic" operation mode
• Setting the temperature adjustable range (maximum, minimum)
• Selecting main or sub remote controller
* When two remote controllers are connected to one group, one controller must be set to sub.
• Setting the use or non-use of clock function
• Setting the timer type
• Contact number display in case of error
• Setting the telephone number
• Setting the temperature unit ( or °F) to display
• Setting the use or non-use of the display of indoor (suction) air temperature
• Setting the use or non-use of the display of "Cooling" or "Heating" display during
operation with automatic mode
[Function selection flowchart] Refer to next page.
[1] Stop the air conditioner to start remote controller function selection mode. [2] Select from item1. [3] Select from item2. [4] Make the setting.
(Details are specified in item3) [5] Setting completed. [6] Change the display to the normal one. (End)
[Detailed setting]
[4] -1. CHANGE LANGUAGE setting
The language that appears on the dot display can be selected.
• Press the [ MENU] button to change the language.
Japanese (JP), English (GB), German (D), Spanish (E),
Russian (RU), Italian (I), Chinese (CH), French (F)
[4] -2. Function limit
(1) Operation function limit setting (operation lock)
• To switch the setting, press the [ ON/OFF] button.
no1 : Operation lock setting is made on all buttons other than
the [ ON/OFF] button.
no2 : Operation lock setting is made on all buttons.
OFF (Initial setting value) : Operation lock setting is not made
* To make the operation lock setting valid on the normal screen, it is
necessary to press buttons (Press and hold down the [FILTER]
and [ ON/OFF] buttons at the same time for 2 seconds.) on
the normal screen after the above setting is made.
.
(2) Use of automatic mode setting
When the remote controller is connected to the unit that has automatic operation mode, the following settings can be made.
• To switch the setting, press the [ ON/OFF] button.
ON (Initial setting value) : The automatic mode is displayed when
the operation mode is selected.
OFF
: The automatic mode is not displayed
when the operation mode is selected.
(3) Temperature range limit setting
After this setting is made, the temperature can be changed within the
set range.
• To switch the setting, press the [ ON/OFF] button.
LIMIT TEMP COOL MODE :
The temperature range can be changed on cooling/dry mode.
LIMIT TEMP HEAT MODE :
The temperature range can be changed on heating mode.
LIMIT TEMP AUTO MODE :
The temperature range can be changed on automatic mode.
OFF (initial setting) : The temperature range limit is not active.
* When the setting, other than OFF, is made, the temperature range limit setting
on cooling, heating and automatic mode is made at the same time. However
the range cannot be limited when the set temperature range has not changed.
• To increase or decrease the temperature, press the [ TEMP ( ) or ( )] button.
• To switch the upper limit setting and the lower limit setting, press the [
]
button. The selected setting will flash and the temperature can be set.
• Settable range
Cooling/Dry mode : Lower limit: 19 ~ 30 Upper limit: 30 ~ 19 Heating mode :
Lower limit: 17 ~ 28 Upper limit: 28 ~ 17 Automatic mode : Lower limit: 19 ~ 28 Upper limit: 28 ~ 19 [4] -3. Mode selection setting
(1) Remote controller main/sub setting
• To switch the setting, press the [ ON/OFF] button.
Main : The controller will be the main controller.
Sub : The controller will be the sub controller.
(2) Use of clock setting
• To switch the setting, press the [ ON/OFF] button.
ON : The clock function can be used.
OFF : The clock function cannot be used.
(3) Timer function setting
• To switch the setting, press the [ ON/OFF] button (Choose one of
the followings.).
WEEKLY TIMER (initial setting):
The weekly timer can be used.
AUTO OFF TIMER: The auto off timer can be used.
SIMPLE TIMER:
The simple timer can be used.
TIMER MODE OFF: The timer mode cannot be used.
* When the use of clock setting is OFF, the "WEEKLY TIMER" cannot be
used.
(4) Contact number setting for error situation
• To switch the setting, press the [ ON/OFF] button.
CALL OFF : The set contact numbers are not displayed in case of error.
CALL **** *** **** : The set contact numbers are displayed in case
of error.
CALL_
: The contact number can be set when the display is as
shown on the left.
• Setting the contact numbers
To set the contact numbers, follow the following procedures.
Move the flashing cursor to set numbers. Press the [ TEMP. ( ) and
( )] button to move the cursor to the right (left). Press the [ CLOCK
( ) and ( )] button to set the numbers.
[4] -4. Display change setting
(1) Temperature display / °F setting
• To switch the setting, press the [
ON/OFF] button.
: The temperature unit is used.
°F : The temperature unit °F is used.
(2) Room air temperature display setting
• To switch the setting, press the [ ON/OFF] button.
ON : The room air temperature is displayed.
OFF : The room air temperature is not displayed.
(3) Automatic cooling/heating display setting
• To switch the setting, press the [ ON/OFF] button.
ON : One of "Automatic cooling" and "Automatic heating" is displayed
under the automatic mode is running.
OFF : Only "Automatic" is displayed under the automatic mode.
78
[Function selection flowchart]
Setting language (English)
Normal display
(Display when the air conditioner is not running)
Hold down the button and press the button for 2 seconds.
Hold down the button and press the button for 2 seconds.
Press the operation mode button.
Press theTIMER MENU button.
Press theTIMER ON/OFF button.
Remote controller function selection mode
Item 1
Change
Language
Item 2
English
Dot display
German
Spanish
TEMP.
Russian
Italian
MENU
BACK
MONITOR/SET
PAR-21MAA
ON/OFF
ON/OFF
FILTER
DAY
CLOCK
CHECK TEST
OPERATION
CLEAR
Chinese
French
Japanese
Item 3
OFF
no1
Operation lock setting is not used.
(Initial setting value)
Operation lock setting is except On/Off button.
Operation lock setting is all buttons.
no2
ON
Function
selection
OFF
The automatic mode is not displayed when the operation mode
is selected.
The temperature range limit is not active. (Initial setting value)
OFF
The temperature range can be changed on cooling/dry mode.
The temperature range can be changed on heating mode.
The automatic mode is displayed when the operation
mode is selected. (Initial setting value)
The temperature range can be changed on automatic mode.
Automatic filter elevation panel up/down operation mode
Not necessary to set this mode. Refer to OPERATION MANUAL of
Optional Parts (Panel) for details on operation.
Not necessary to set this mode. Refer to OPERATION MANUAL of
indoor unit for details on operation.
Mode
selection
Fixed air flow direction mode
The remote controller will be the main controller. (Initial setting value)
OFF
The clock function can not be used.
Weekly timer can be used. (Initial setting value)
The remote controller will be the sub controller.
The clock function can be used. (Initial setting value)
ON
Auto off timer can be used.
Simple timer can be used.
Timer mode can not be used.
OFF
Display
mode setting
OFF
OFF
The set contact numbers are displayed in case of error.
The temperature unit °F is used.
Room air temperature is displayed. (Initial setting value)
ON
79
°F
The set contact numbers are not displayed in case of error.
(Initial setting value)
The temperature unit °C is used. (Initial setting value)
ON
CALL-
°C
Room air temperature is not displayed.
One of “Automatic cooling” and “Automatic heating” is displayed
under the automatic mode is running. (Initial setting value)
Only “Automatic” is displayed under the automatic mode.
13
EASY MAINTENANCE FUNCTION
L Reduces maintenance work drastically.
L Enables you to check operation data of the indoor and outdoor units by remote controller.
Furthermore, use of maintenance stable-operation control that fixes the operating frequency, allows smooth inspection, even for
inverter models.
Smooth Maintenance Function
Discharge temperature 64
L Conventional inspection work
LOutdoor unit L
LIndoor unit L
Measure
the intake air
temperature.
Remove the
service panel.
Easy maintenance information (unit)
Compressor
Accumulated operating
time (%10 hours)
Number of ON/OFF
times (%10 times)
Operating
current (A)
Outdoor unit
Indoor unit
Heat exchanger
temperature ()
Discharge
temperature ()
Outside air
temperature ()
Measure the discharge
temperature.
Intake air
temperature ()
Heat exchanger
temperature ()
Filter operating
time* (Hours)
Measure the outside air
temperature
* The filter operating time is the time that has elapsed since the filter was reset.
13-1.MAINTENANCE MODE OPERATION METHOD
*
If you are going to use 13-2. "GUIDE FOR OPERATION CONDITION", set the airflow to "High" before activating maintenance mode.
L Switching to maintenance mode
Maintenance mode can be activated either when the air conditioner is operated or stopped.
It cannot be activated during test run.
+ Maintenance information can be viewed even if the air conditioner is stopped.
N Remote controller button information
Operation mode
Compressor information Outdoor unit information Indoor unit information
Confirm
Activate/cancel maintenance mode
(1) Press the TEST button for 3 seconds to switch to maintenance mode.
[Display ] MAINTENANCE
If stable operation is unnecessary or if you want to check the data with the air conditioner stopped, skip to step (4).
L Fixed Hz operation
The operating frequency can be fixed to stabilize operation of inverter model.
If the air conditioner is currently stopped, start it by this operation.
(2) Press the
[Display ]
MODE button to select the desired operation mode.
Stable cooling
operation
Stable heating
operation
Stable operation
cancellation
COOL
STABLE MODE
HEAT
STABLE MODE
STABLE MODE
CANCEL
(3) Press the FILTER ( ) button to confirm the setting.
[Display ] Waiting for stabilization
Stabilized
After 10 to 20 minutes
80
L Data measurement
When the operation is stabilized, measure operation data as explained below.
(4) Press the [TEMP] buttons (
and
) to select the desired refrigerant address.
[Screen ]
(5) Select the type of data to be displayed.
After selecting, go to step (6).
Compressor information
MENU button
[Display ]
Cumulative
operation time
ON/OFF Number
COMP ON
x10 HOURS
COMP ON
x100 TIMES
Operating current
COMP ON
CURRENT (A)
Outdoor unit information
ON/OFF button
exchanger
Heat
temperature
[Display ]
OUTDOOR UNIT
H·EXC. TEMP
Comp discharge
temperature
OUTDOOR UNIT
OUTLET TEMP
Outdoor ambient
temperature
OUTDOOR UNIT
OUTDOOR TEMP
Indoor unit information
button
[Display ]
Indoor room
temperature
Heat exchanger
temperature
INDOOR UNIT
INLET TEMP
INDOOR UNIT
H·EXC. TEMP
Filter operating
time
INDOOR UNIT
FILTER USE H
(6) Press the FILTER ( ) button to confirm the setting.
[Display example for accumulated operating time]
Blinking
Display Waiting for response
After approx.
10 seconds
12,340 hours
(7) Data is displayed on the display (at ).
To check the data for each item, repeat steps (5) to (7).
(8) To cancel maintenance mode, press the
TEST
button for 3 seconds or press the
N Refrigerant address
Single refrigerant system
ON/OFF button.
Multi refrigerant system (group control)
In the case of single refrigerant system, the refrigerant address
is "00" and no operation is required.
Simultaneous twin, triple units belong to this category
(single refrigerant system).
[1:1]
Refrigerant
address=00
[Twin]
Refrigerant
address=00
Outdoor
unit
Outdoor
unit
Indoor unit
01
Indoor unit
01
Remote
controller
Remote
controller
Indoor unit
02
Up to 16 refrigerant systems (16 outdoor units) can be connected as a group by 1remote controller. To check or set the
refrigerant addresses.
Refrigerant
address
00
Outdoor
unit
Refrigerant
address
01
Outdoor
unit
Refrigerant
address
02
Outdoor
unit
Refrigerant
address
15
Outdoor
unit
Indoor unit
01
Indoor unit
01
Indoor unit
01
Indoor unit
01
Remote
controller
81
13-2.GUIDE FOR OPERATION CONDITION
Check Points
Good
Retightened
Outdoor Unit
Good
Retightened
Indoor Unit
Good
Retightened
(Insulation resistance)
M
(Voltage)
CleanliTemperature
ness
Temperature
Cleanliness
Outdoor Unit
pressor
Time
Number of ON/OFF times
Times
Current
A
Classification
Item
HEAT
COOL
HEAT
Inspection
Is "D000" displayed stably on the remote
COOL
HEAT
COOL
HEAT
Refrigerant/heat exchanger temperature
COOL
Refrigerant/discharge temperature
Air/outside air temperature
(Air/discharge temperature)
Appearance
Good
Cleaning required
Heat exchanger
Good
Cleaning required
Sound/vibration
None
Present
Air/intake air temperature
HEAT
COOL
HEAT
Refrigerant/heat exchanger temperature COOL
HEAT
(Air/discharge temperature)
Filter operating time*
controller?
difference
Good
Cleaning required
Filter
Good
Cleaning required
Fan
Good
Cleaning required
Heat exchanger
Good
Cleaning required
Sound/vibration
None
Present
* The filter operating time is the time that has elapsed since the filter was reset.
Is "D000" displayed stably on the remote
controller?
Temperature ( Discharge temperature) – ( Indoor
difference
Normal operation state
Filter inspection
Filter may be clogged. *1
Inspection A
Performance has dropped. Detailed in-
Heat
spection is necessary.
Inspection B
Refrigerant amount is dropping.
Inspection C
Filter or indoor heat exchanger may be
Heat mode
45
40
Inspection C
35
30
25
Filter inspection
20
Normal
15
10
Inspection B
Inspection A
5
0 10
20 30 40 50 60 70 80
[ Discharge temperature] – [ Outdoor
heat exchanger temperature)
clogged.
*
* Fixed Hz operation may not be possible under the following temperature ranges.
A)In cool mode, outdoor intake air temperature is 40 or higher or
indoor intake air temperature is 23 or lower.
B)In heat mode, outdoor intake air temperature is 20 or higher or
indoor intake air temperature is 25 or lower.
* If the air conditioner is operated at a temperature range other than the
ones above but operation is not stabilized after 30 minutes or more have
elapsed, carry out inspection.
* In heat mode, the operation state may vary due to frost forming on the
outdoor heat exchanger.
( Indoor intake air temperature)— (Indoor
heat exchanger temperature)
Normal
heat exchanger temperature)
( Indoor intake air temperature)
Judgment
Cool
Stable Unstable
( Indoor heat exchanger temperature) –
Result
Check item
Indoor heat exchanger temperature)
Cool mode
Area
heat exchanger temperature)
( Indoor intake air temperature) – (
Time
Decorative panel
Stable Unstable
Temperature ( Discharge temperature) – ( Outdoor
Inspection
COOL
Result
The above judgement is just guide based on Japanese standard
conditions.
It may be changed depending on the indoor and
outdoor temperature.
*1 It may be judged as "Filter inspection" due to the
outdoor temperature, even though it is not clogged.
82
( Indoor heat exchanger temperature) —
( Indoor intake air temperature)
Com-
Indoor Unit
V
Accumulated operating time
Enter the temperature differences between , , and into
the graph given below.
Operation state is determined according to the plotted areas on
the graph.
For data measurements, set the fan speed to "Hi" before activating maintenance mode.
Cool
Terminal block
Result
Breaker
Heat
Power supply
Loose connection
Inspection item
45
40
Inspection C
Filter inspection
35
30
25
Normal
20
15
10
Inspection B
Inspection A
5
0 10
20 30 40 50 60 70 80
[ Discharge temperature] – [ Indoor
heat exchanger temperature)
14
MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER
14-1. HOW TO "MONITOR THE OPERATION DATA"
•
Turn on the [Monitoring the operation data]
Example) Request code "004"
Discharge temperature 69
Refrigerant address "00"
(7)
(3)
(5)
(1)
(2) (6)
(4)
(1) Press the
TEST
B: Refrigerant address
C: Data display area
D: Request code display area
button for 3 seconds so that [ Maintenance mode] appears on the screen (at ).
(2) Press the CHECK button for 3 seconds to switch to [Maintenance monitor].
Note) It is not possible to switch to [Maintenance monitor] during data request in maintenance mode (i.e., while " - - - -" is blinking
since no buttons are operative.
Operating the service inspection monitor
[ - - - ] appears on the screen (at ) when [Maintenance monitor] is activated.
(The display (at ) now allows you to set a request code No.)
and
) to select the desired refrigerant address.
(3) Press the [TEMP] buttons (
[Screen ]
(4) Press the [CLOCK] buttons (
and
) to set the desired request code No.
(5) Press the FILTER button to perform data request.
(The requested data will be displayed at in the same way as in maintenance mode.)
Data collected during operation of the remote controller will be displayed.
The collected data such as temperature data will not be updated automatically even if the data changes.
To display the updated data, carry out step (4) again.
Canceling the Monitoring the operation data
(6) While [Maintenance monitor] is displayed, press the
(7) To return to normal mode, press the
CHECK
ON/OFF button.
83
button for 3 seconds to return to maintenance mode.
14-2. REQUEST CODE LIST
Request code
* Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed.
Description
Request content
(Display range)
Unit
0
Operation state
Refer to 14-2-1. Detail Contents in Request Code.
–
1
Compressor-Operating current (rms)
0 – 50
A
2
Compressor-Accumulated operating time
0 – 9999
10 hours
3
Compressor-Number of operation times
0 – 9999
100 times
4
Discharge temperature (TH4)
3 – 217
5
Outdoor unit - Liquid pipe 1 temperature (TH3)
-40 – 90
6
Outdoor unit - Liquid pipe 2 temperature
-40 – 90
7
Outdoor unit-2-phase pipe temperature (TH6)
-39 – 88
9
Outdoor unit-Outside air temperature (TH7)
-39 – 88
10
Outdoor unit-Heat sink temperature (TH8)
-40 – 200
12
Discharge super heat (SHd)
0 – 255
13
Sub-cool (SC)
0 – 130
16
Compressor-Operating frequency
0 – 255
Hz
17
Compressor-Target operating frequency
0 – 255
Hz
18
Outdoor unit-Fan output step
0 – 10
Step
0 – 9999
rpm
0 – 9999
rpm
Remarks
8
11
14
15
19
20
Outdoor unit-Fan 1 speed
(Only for air conditioners with DC fan motor)
Outdoor unit-Fan 2 speed
(Only for air conditioners with DC fan motor)
"0" is displayed if the air conditioner is a single-fan
type.
21
22
LEV (A) opening
0 – 500
Pulses
23
LEV (B) opening
0 – 500
Pulses
25
Primary current
0 – 50
A
26
DC bus voltage
180 – 370
V
29
Number of connected indoor units
0–4
30
Indoor unit-Setting temperature
17 – 30
31
Indoor unit-Intake air temperature <Measured by thermostat> 8 – 39
24
27
28
32
33
34
35
Indoor unit-Intake air temperature (Unit No. 1)
Units
8 – 39
<Heat mode-4-deg correction>
Indoor unit-Intake air temperature (Unit No. 2)
8 – 39
<Heat mode-4-deg correction>
Indoor unit-Intake air temperature (Unit No. 3)
8 – 39
<Heat mode-4-deg correction>
Indoor unit-Intake air temperature (Unit No. 4)
"0" is displayed if the target unit is not present.
8 – 39
<Heat mode-4-deg correction>
36
37
Indoor unit - Liquid pipe temperature (Unit No. 1)
-39 – 88
38
Indoor unit - Liquid pipe temperature (Unit No. 2)
-39 – 88
39
Indoor unit - Liquid pipe temperature (Unit No. 3)
-39 – 88
40
Indoor unit - Liquid pipe temperature (Unit No. 4)
-39 – 88
42
Indoor unit-Cond./Eva. pipe temperature (Unit No. 1)
-39 – 88
43
Indoor unit-Cond./Eva. pipe temperature (Unit No. 2)
-39 – 88
44
Indoor unit-Cond./Eva. pipe temperature (Unit No. 3)
-39 – 88
45
Indoor unit-Cond./Eva. pipe temperature (Unit No. 4)
-39 – 88
48
Thermostat ON operating time
0 – 999
Minutes
49
Test run elapsed time
0 – 120
Minutes
"0" is displayed if the target unit is not present.
41
"0" is displayed if the target unit is not present.
46
47
84
Not possible to activate maintenance mode during the test run.
Request code
Description
Request content
(Display range)
Unit
50
Indoor unit-Control state
Refer to 14-2-1.Detail Contents in Request Code.
–
51
Outdoor unit-Control state
Refer to 14-2-1.Detail Contents in Request Code.
–
52
Compressor-Frequency control state
Refer to 14-2-1.Detail Contents in Request Code.
–
53
Outdoor unit-Fan control state
Refer to 14-2-1.Detail Contents in Request Code.
–
54
Actuator output state
–
55
Error content (U9)
–
56
57
58
59
60
Signal transmission demand capacity
0 – 255
%
61
Contact demand capacity
Refer to 14-2-1.Detail Contents in Request Code.
–
62
External input state (silent mode, etc.)
Refer to 14-2-1.Detail Contents in Request Code.
–
63
64
65
66
67
68
69
70
Outdoor unit-Capacity setting display
Refer to 14-2-1.Detail Contents in Request Code.
–
71
Outdoor unit-Setting information
Refer to 14-2-1.Detail Contents in Request Code.
–
73
Outdoor unit-SW1 setting information
Refer to 14-2-1.Detail Contents in Request Code.
–
74
Outdoor unit-SW2 setting information
Refer to 14-2-1.Detail Contents in Request Code.
–
72
75
76
Outdoor unit-SW4 setting information
Refer to 14-2-1.Detail Contents in Request Code.
–
77
Outdoor unit-SW5 setting information
Refer to 14-2-1.Detail Contents in Request Code.
–
78
Outdoor unit-SW6 setting information
Refer to 14-2-1.Detail Contents in Request Code.
–
79
Outdoor unit-SW7 setting information
Refer to 14-2-1.Detail Contents in Request Code.
–
80
Outdoor unit-SW8 setting information
Refer to 14-2-1.Detail Contents in Request Code.
–
81
Outdoor unit-SW9 setting information
Refer to 14-2-1.Detail Contents in Request Code.
–
82
Outdoor unit-SW10 setting information
Refer to 14-2-1.Detail Contents in Request Code.
–
M-NET adapter connection (presence/absence)
"0000": Not connected
"0001": Connected
–
89
Display of execution of replace/wash operation
"0000": Not washed
"0001": Washed
–
90
Outdoor unit-Microcomputer version information
Examples) Ver 5.01 © "0501"
Ver
83
84
85
86
87
88
Auxiliary information (displayed after
91
Outdoor unit-Microcomputer version information (sub No.) version information)
–
Examples) Ver 5.01 A000 © "A000"
92
93
94
95
96
97
98
99
100 Outdoor unit - Error postponement history 1 (latest)
101 Outdoor unit - Error postponement history 2 (previous)
102 Outdoor unit - Error postponement history 3 (last but one)
Displays postponement code. (" - - " is
displayed if no postponement code is present)
Displays postponement code. (" - - " is
displayed if no postponement code is present)
Displays postponement code. (" - - " is
displayed if no postponement code is present)
85
Code
Code
Code
Remarks
Request code
Description
Request content
(Display range)
Unit
103 Error history 1 (latest)
Displays error history. (" - - " is displayed if no history is present.)
Code
104 Error history 2 (second to last)
Displays error history. (" - - " is displayed if no history is present.)
Code
105 Error history 3 (third to last)
Displays error history. (" - - " is displayed if no history is present.)
Code
Remarks
3 : TH3
106
Abnormal thermistor display
(TH3/TH6/TH7/TH8)
6 : TH6
7 : TH7
Sensor
8 : TH8
number
0 : No thermistor error
107 Operation mode at time of error
Displayed in the same way as request code "0".
108 Compressor-Operating current at time of error
0 − 50
Ð
A
109 Compressor-Accumulated operating time at time of error 0 − 9999
10 hours
110 Compressor-Number of operation times at time of error 0 − 9999
100 times
111 Discharge temperature at time of error
3 − 217
112 Outdoor unit - Liquid pipe 1 temperature (TH3) at time of error
-40 − 90
113 Outdoor unit - Liquid pipe 2 temperature at time of error -40 − 90
-39 − 88
116 Outdoor unit-Outside air temperature (TH7) at time of error -39 − 88
117 Outdoor unit-Heat sink temperature (TH8) at time of error -40 − 200
114 Outdoor unit-2-phase pipe temperature (TH6) at time of error
115
118 Discharge super heat (SHd) at time of error
0 − 255
119 Sub-cool (SC) at time of error
0 − 130
120 Compressor-Operating frequency at time of error
0 − 255
Hz
0 − 10
Step
121
Outdoor unit at time of error
• Fan output step
Outdoor unit at time of error
0 − 9999
rpm
0 − 9999
rpm
125 LEV (A) opening at time of error
0 − 500
Pulses
126 LEV (B) opening at time of error
0 − 500
Pulses
0 − 999
Minutes
-39 − 88
-39 − 88
-39 − 88
150 Indoor-Actual intake air temperature
-39 − 88
151 Indoor - Liquid pipe temperature
-39 − 88
152 Indoor-condenser/evaporator pipe temperature
-39 − 88
122
123
• Fan 1 speed (Only for air conditioners with DC fan)
Outdoor unit at time of error
• Fan 2 speed (Only for air conditioners with DC fan)
"0" is displayed if the air conditioner is a singlefan type.
124
127
128
129
130 Thermostat ON time until operation stops due to error
131
132
133
134
Indoor - Liquid pipe temperature at time of error
Indoor-2-phase pipe temperature at time of error
Indoor at time of error
• Intake air temperature <Thermostat judge temperature>
135
136
137
138
139
140
~
146
147
148
149
86
Average value of all indoor units is displayed if the air conditioner consists of two or more indoor units (twin, triple, quad).
Average value of all indoor units is displayed if the air conditioner consists of two or more indoor units (twin, triple, quad).
Request code
Description
Request content
(Display range)
Unit
Remarks
153
154
155
Indoor-Fan operating time
(After filter is reset)
Indoor-Total operating time
(Fan motor ON time)
0 – 9999
1 hour
0 – 9999
10 hours
156
157 Indoor fan output value (Sj value)
0 – 255
Fan control data
–
For indoor fan phase control
"00 **" "**" indicates fan control data.
–
For indoor fan pulsation control
"00 **" "**" indicates fan control data.
–
For indoor DC brushless motor control
162 Indoor unit-Model setting information
Refer to 14-2-1. Detail Contents in Request Code.
–
163 Indoor unit-Capacity setting information
Refer to 14-2-1. Detail Contents in Request Code.
–
164 Indoor unit-SW3 information
Undefined
–
165 Wireless pair No. (indoor control board side) setting
Refer to 14-2-1. Detail Contents in Request Code.
–
166 Indoor unit-SW5 information
Undefined
–
Examples) Ver 5.01 © "0501"
Ver
158
Indoor fan output value
(Pulsation ON/OFF)
159 Indoor fan output value (duty value)
160
161
167
~
189
190 Indoor unit-Microcomputer version information
191 Indoor unit-Microcomputer version information (sub No.) Auxiliary information (displayed after version information)
Examples) Ver 5.01 A000 © "A000"
–
192
~
764
765 Stable operation (Heat mode)
This request code is not provided to collect data. It is used to fix the operation state.
766 Stable operation (Cool mode)
This request code is not provided to collect data. It is used to fix the operation state.
767 Stable operation cancellation
This request code is not provided to collect data. It is used to cancel the operation state that has been
fixed by request codes "765" and "766".
87
14-2-1. Detail Contents in Request Code
Example) Request code "004"
Discharge temperature 69
Refrigerant address "00"
[Operation state] (Request code :"0")
Relay output state
Data display
Display
C
4
0
1
2
3
4
5
6
7
8
A
Relay output state
Operation mode
Operation mode
Display
0
C
H
d
B: Refrigerant address
C: Data display area
D: Request code display area
Operation mode
STOP • FAN
COOL • DRY
HEAT
Defrost
Power currently
supplied to compressor
–
Compressor
Four-way valve
Solenoid valve
–
–
–
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
[Indoor unit – Control state] (Request code :" 50 ")
Data display
Unit No. 4 state
Unit No. 3 state
Unit No. 2 state
Unit No. 1 state
Display
0
1
2
3
4
5
6
7
F
State
Normal
Preparing for heat operation
–
–
Heater is ON.
Anti-freeze protection is ON.
Overheat protection is ON.
Requesting compressor to turn OFF
There are no corresponding units.
[Outdoor unit – Control state] (Request code :"51")
0
0
0
Data display
0
0
0
0
0
1
0
0
2
State
Normal
Preparing for heat operation.
Defrost
[Compressor – Frequency control state] (Request code :"52")
Frequency control state Data display
0
Display
0
Frequency control state Frequency control state Frequency control state Display
0
1
2
Current limit control
No current limit
Primary current limit control is ON.
Secondary current limit control is ON.
0
1
2
3
4
5
6
7
8
9
A
b
C
d
E
F
Discharge temperature Condensation temperature
Anti-freeze
Heatsink temperature
overheat prevention
overheat prevention
protection control overheat prevention
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
88
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
Controlled
[Fan control state] (Request code :" 53 ")
Data display
0
0
Fan step correction value by heatsink temperature overheat prevention control
Fan step correction value by cool condensation temperature overheat prevention control
Display
- (minus)
0
1
2
Correction value
–1
0
+1
+2
[Actuator output state] (Request code :"54")
Data display
0
0
Actuator output state Actuator output state Actuator output state Display
SV1
0
1
ON
2
3
ON
4
5
ON
6
7
ON
8
9
ON
A
b
ON
C
d
E
F
Actuator output state Four-way valve
Compressor
Compressor is
warming up
ON
ON
ON
ON
ON
ON
ON
52C
0
1
ON
2
3
4
5
6
7
ON
ON
ON
ON
ON
SV2
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
[Error content (U9)] (Request code :"55 ")
Data display
0
0
Error content Error content Error content Display
Overvoltage
error
: Detected
Undervoltage
error
L-phase
open error
Power synchronizing
signal error
0
1
2
3
4
5
6
7
8
9
A
b
C
d
E
F
Error content Display
0
1
2
3
89
Converter Fo
error
SS
ON
ON
ON
ON
ON
ON
ON
ON
ON
Display
: Detected
PAM error
ON
ON
ON
ON
[Contact demand capacity] (Request code :"61")
Data display
0
0
Setting content
0
Setting content
Display
Setting value
0
1
2
3
0%
50%
75%
100%
Setting
SW7-1
SW7-2
ON
ON
ON
ON
Silent mode
input
Spare 1
input
[External input state] (Request code :"62")
Data display
0
0
Input state
0
Input state
Display
Contact demand
input
0
1
2
3
4
5
6
7
8
9
A
b
C
d
E
F
[Outdoor unit -–Capacity setting display] (Request code : "70")
Data display
9
10
11
14
20
25
28
40
50
Capacity
35
50
60
71
100
125
140
200
250
[Outdoor unit – Setting information] (Request code :"71")
Data display
0
0
Setting information Setting information Setting information Display
Defrost mode
0
Standard
1
For high humidity
Setting information Single-/
Display
3-phase
0
Single-phase
1
2
3-phase
3
90
Heat pump/
cooling only
Heat pump
Cooling only
Heat pump
Cooling only
: Input present
Spare 2
input
[Outdoor unit switch setting display (SW1 to SW10, except SW3)] Request codes: 73 to 82
0: Swich OFF
1: Swich ON
SW1, SW2, SW6, SW7
Data display
1
2
3
4
5
6
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
01
02
03
04
05
06
07
08
09
0A
0b
0C
0d
0E
0F
10
11
12
13
14
15
16
17
18
19
1A
1B
1C
1D
1E
1F
20
21
22
23
24
25
26
27
28
29
2A
2B
2C
2D
2E
2F
30
31
32
33
34
35
36
37
38
39
3A
3B
3C
3D
3E
3F
0: Swich OFF
SW5
1
2
3
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1: Swich ON
4
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0: Swich OFF
SW8
1
2
3
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
Data display
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
01
02
03
04
05
06
07
08
09
0A
0b
0C
0d
0E
0F
1: Swich ON
Data display
0
0
0
0
1
1
1
1
00
00
00
00
00
00
00
00
00
01
02
03
04
05
06
07
0: Swich OFF
1: Swich ON
SW4, SW9, SW10
Data display
1
2
0
1
0
1
0
0
1
1
91
00
00
00
00
00
01
02
03
[Indoor unit – Model setting information] (Request code :"162")
Data display
0
Display
0
See the table on the right.
00
01
02
03
04
05
06
07
08
09
0A
0b
0C
0d
0E
0F
10
11
12
13
14
15
16
17
18
19
1A
1b
1C
1d
1E
1F
Model setting state
PSA-RP•GA, PSH-PGAH
PEAD-RP•EA(2)/GA, PEHD-P•EAH
SEZ-KA•VA
SLZ-KA•VA(L)
PCA-RP•HA
PEA-RP•EA
MEXZ-GA•VA(L)
Display
20
21
22
23
24
25
26
27
28
29
2A
2b
2C
2d
2E
2F
30
31
32
33
34
35
36
37
38
39
3A
3b
3C
3d
3E
3F
Model setting state
PKA-RP•FAL(2), PKH-P•FALH
PCA-RP•GA(2), PCH-P•GAH, PLA-RP•BA, PLA-RP71/100/125BA2
PCA-RP•KA
PKA-RP•GAL, PKH-P•GALH
PLA-RP• AA
PLH-P•AAH
PKA-RP•HAL/KAL
PEAD-RP•JA(L)
PLA-RP•AA2
PLA-RP100BA3, 140BA2
[Indoor unit – Capacity setting information] (Request code :"163")
Data display
0
0
See the table on the right.
Display
Capacity setting state
Display
Capacity setting state
00
01
02
03
04
05
06
07
08
09
0A
0b
0C
0d
0E
0F
12
16
22
25
28
32
35, 36
40
45
50
56
63
71
80
90
100
10
11
12
13
14
15
16
17
18
19
1A
1b
1C
1d
1E
1F
112
125
140
160
200
224
250
280
[Wireless pair No. (indoor control board side) setting] (Request code :"165")
Data display
0
Display
0
See the table on the right.
00
01
02
03
Pair No. setting state
No.
No.
No.
No.
0
1 J41 disconnected
2 J42 disconnected
3 J41, J42 disconnected
92
15
DISASSEMBLY PROCEDURE
PUHZ-P100VHA2.UK
PUHZ-P100VHA3.UK
PUHZ-P100VHA3R1.UK
PHOTOS & ILLUSTRATION
OPERATING PROCEDURE
1. Removing the service panel and top panel
(1) Remove 3 service panel fixing screws (5 × 10) and slide
the hook on the right downward to remove the service
panel.
(2) Remove screws (3 for front, 3 for rear/5 × 10) of the top
panel and remove it.
Figure 1
Top panel fixing screws
Top panel
Slide
Service panel
Service panel
fixing screws
Fan grille
Grill fixing screws
2. Removing the fan motor (MF1)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove 5 fan grille fixing screws (5 × 10) to detach the
fan grille. (See Figure 1.)
(4) Remove a nut (for right handed screw of M6) to detach
the propeller. (See Photo 1)
(5) Disconnect the connector CNF1 on controller circuit
board in electrical parts box.
(6) Remove 4 fan motor fixing screws (5 × 25) to detach the
fan motor. (See Photo 2)
Photo 1
Front panel
Propeller
93
Fan
motor
Fan motor fixing screws (MF1)
Nut
Front panel fixing screws
3. Removing the electrical parts box
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Disconnect the indoor/outdoor connecting wire from
terminal block.
(4) Remove all the following connectors from controller circuit board;
fan motor, linear expansion valve, thermistor<Outdoor pipe>,
thermistor<Discharge>, thermistor<Outdoor 2-phase pipe>,
thermistor<Outdoor>, thermistor<Heatsink>,
high pressure switch, 4-way valve and bypass valve.
Then remove a screw (4 × 8) from the valve bed to
remove the lead wire.
Pull out the disconnected wire from the electrical parts box.
<Diagram symbol in the connector housing>
• Fan motor (CNF1)
• LEV (LEV-A)
• Thermistor <Outdoor pipe> (TH3)
• Thermistor <Discharge> (TH4)
• Thermistor <Outdoor 2-phase pipe, Outdoor> (TH6/7)
• Thermistor <Heatsink> (CN3)
• High pressure switch (63H)
• 4-way valve (21S4)
(5) Remove the terminal cover and disconnect the compressor
lead wire.
(6) Remove an electrical parts box fixing screw (4 × 10) and
detach the electrical parts box by pulling it upward. The
electrical parts box is fixed with 2 hooks on the left and 1
hook on the right.
Photo 2
Fan motor
fixing screws
Photo 3
Electrical parts box
Controller circuit
board
(C.B.)
Electrical parts
box fixing screw
Terminal block
(TB1)
Valve bed
Terminal cover
Compressor (MC)
Cover panel
(Front)
Cover panel fixing screws
OPERATING PROCEDURE
PHOTOS
4. Removing the thermistor <Outdoor 2-phase pipe> (TH6)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Disconnect the connectors, TH6 and TH7 (red), on the
controller circuit board in the electrical parts box.
Thermistor
<Outdoor 2-phase pipe>
(TH6)
Photo 4
(4) Loosen the clamp for the lead wire of the electrical parts box.
(5) Pull out the thermistor <Outdoor 2-phase pipe> (TH6)
from the sensor holder.
Note: In case of replacing thermistor <Outdoor 2-phase
pipe> (TH6), replace it together with thermistor
<Outdoor> (TH7), since they are combined together.
Refer to No.5 below to remove thermistor <Outdoor>.
Electrical
parts box
5. Removing the thermistor <Outdoor> (TH7)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Disconnect the connector TH7 (red) on the controller circuit
board in the electrical parts box.
(4) Loosen the clamp for the lead wire in the rear of the
electrical parts box. (See Photo 4)
(5) Pull out the thermistor <Outdoor> (TH7) from the sensor
holder.
Photo 5
Note: In case of replacing thermistor <Outdoor> (TH7),
replace it together with thermistor <Outdoor 2-phase
pipe> (TH6), since they are combined together.
Refer to No.4 above to remove thermistor
<Outdoor 2-phase pipe>.
Lead wire of thermistor
<Outdoor> (TH7)
6. Removing the thermistor <Outdoor pipe> (TH3) and
thermistor <Discharge> (TH4)
(1) Remove the service panel. (See Figure 1)
(2) Disconnect the connectors, TH3 (white) and TH4 (white),
on the controller circuit board in the electrical parts box.
(3) Loosen the clamp for the lead wire in the rear of the
electrical parts box. (See Photo 4)
(4) Pull out the thermistor <Outdoor pipe> (TH3) and
thermistor <Discharge> (TH4) from the sensor holder.
Sensor holder
Photo 6
Thermistor
<Discharge>
(TH4)
94
Thermistor
<Outdoor pipe>
(TH3)
Clamp
PHOTOS
OPERATING PROCEDURE
7. Removing the 4-way valve (21S4), LEV coil (LEV(A))
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove the electrical parts box. (See Photo 3)
[Removing the 4-way valve]
(4) Remove the 4-way valve fixing screw (M4 × 6).
(5) Remove the 4-way valve by sliding the coil toward you.
(6) Disconnect the connector 21S4 (green) on the controller
board in the electrical parts box.
[Removing the linear expansion valve coil]
(4) Remove the LEV coil by sliding the coil upward.
(5) Disconnect the connectors, LEV A (white), on the controller
circuit board in the electrical parts box.
Photo 7
4-way valve
fixing screw
LEV coil (LEV A)
4-way valve
4-way valve
(21S4)
8. Removing the 4-way valve
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove the electrical parts box. (See Photo 3)
(4) Remove 3 valve bed fixing screws (4 × 10) and 4 ball
valve and stop valve fixing screws (5 × 16) and then
remove the valve bed.
(5) Remove 3 right side panel fixing screws (5 × 10) in the
rear of the unit and then remove the right side panel.
(6) Remove the 4-way valve. (See Photo 7)
(7) Recover refrigerant.
(8) Remove the welded part of 4-way valve.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by removing the right side panel.
Note 3: When installing the four-way valve, cover it with a wet
cloth to prevent it from heating (120°C or more), then
braze the pipes so that the inside of pipes are not oxidized.
9. Removing the LEV
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove the electrical parts box. (See Photo 3)
(4) Remove 3 valve bed fixing screws (4 × 10) and 4 ball
valve and stop valve fixing screws (5 × 16) and then
remove the valve bed.
(5) Remove 3 right side panel fixing screws (5 × 10) in the
rear of the unit and then remove the right side panel.
(6) Remove the LEV. (See Photo 7)
(7) Recover refrigerant.
(8) Remove the welded part of LEV.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by removing the right side panel.
Note 3: When installing the LEV, cover it with a wet cloth
to prevent it from heating (120°C or more), then
braze the pipes so that the inside of pipes are not
oxidized.
95
Photo 8
LEV coil (LEV A)
LEV
4-way valve
OPERATING PROCEDURE
PHOTOS
10. Removing the high pressure switch (63H)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove the electrical parts box. (See Photo 3)
(4) Remove 3 right side panel fixing screws (5 × 10) in the
rear of the unit and remove the right side panel.
(5) Pull out the lead wire of high pressure switch.
(6) Recover refrigerant.
(7) Remove the welded part of high pressure switch.
Photo 9
Lead wire of
high pressure switch
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by
removing the right side panel.
Note 3: When installing the high pressure switch, cover it
with a wet cloth to prevent it from heating (100°C
or more), then braze the pipes so that the inside
of pipes are not oxidized.
High pressure switch (63H)
11. Removing the reactor (DCL)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove the electrical parts box. (See Photo 3)
(4) Remove 4 reactor fixing screws (4 × 10) and remove the
reactor.
w The reactor is attached to the rear of the electrical parts box.
Photo 10
Reactor fixing screw
Reactor
(DCL)
Reactor fixing screws
96
Electrical parts box
OPERATING PROCEDURE
PHOTOS
12. Removing the compressor (MC)
Photo 11
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove 2 front cover panel fixing screws (5 × 10) and
Terminal cover
remove the front cover panel. (See Photo 3)
(4) Remove 2 back cover panel fixing screws (5 × 10) and
remove the back cover panel.
(5) Remove the electrical parts box. (See Photo 3)
(6) Remove 3 valve bed fixing screws (4 × 10) and 4 stop valve
fixing screws (5 × 16) and then remove the valve bed.
(7) Remove 3 right side panel fixing screws (5 × 10) in the rear
of the unit and then remove the right side panel.
(8) Remove 3 separator fixing screws (4 × 10) and remove
the separator.
(9) Remove the terminal cover and then remove the lead wire
for compressor.
(10) Remove the soundproof cover for compressor.
(11) Recover refrigerant.
(12) Remove the 3 points of the motor for compressor fixing
nut using a spanner or a adjustable wrench.
(13) Remove the welded pipe of motor for compressor inlet
and outlet and then remove the compressor.
Inlet
Outlet
Accumulator
Note: Recover refrigerant without spreading it in the air.
Separator
13. Removing the accumulator
(1) Remove the service panel. (See Figure 1)
Separator
(2) Remove the top panel. (See Figure 1)
fixing screw
(3) Remove 2 front cover panel Fixing screws (5 × 10) and
remove the front cover panel. (See Photo 3)
(4) Remove 2 back cover panel fixing screws (5 × 10) and
remove the back cover panel.
(5) Remove the electrical parts box. (See Photo 3)
(6) Remove 3 valve bed fixing screws (4 × 10) and 4 stop valve
fixing screws (5 × 16) and then remove the valve bed.
(7) Remove 3 right side panel fixing screws (5 × 10) in the
rear of the unit and then remove the right side panel.
(8) Recover refrigerant.
(9) Remove welded pipes of accumulator inlet and outlet.
(10) Remove 2 accumulator leg fixing screws (4 × 10).
Note: Recover refrigerant without spreading it in the air.
97
Accumulator leg
fixing screws
Soundproof
cover for
compressor
PUHZ-P125VHA2.UK
PUHZ-P125VHA3.UK
PUHZ-P140VHA2.UK
PUHZ-P140VHA3.UK
PUHZ-P125VHA21.UK
PUHZ-P140VHA21.UK
PUHZ-P125VHA3R1.UK PUHZ-P140VHA3R1.UK
PHOTOS & ILLUSTRATION
OPERATING PROCEDURE
1. Removing the service panel and top panel
(1) Remove 3 service panel fixing screws (5 × 10) and slide
the hook on the right downward to remove the service
panel.
(2) Remove screws (3 for front, 3 for rear/5 × 10) of the top
panel and remove it.
Figure 1
Top panel fixing screws
Top panel
Service panel
Grille
fixing
screws
Slide
Fan grille
Grille
fixing
screws
2. Removing the fan motor (MF1, MF2)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove 5 fan grille fixing screws (5 × 10) to detach the
fan grille. (See Figure 1)
(4) Remove a nut (for right handed screw of M6) to detach
the propeller. (See Photo 1)
(5) Disconnect the connectors, CNF1, CNF2 on controller
circuit board in electrical parts box.
(6) Remove 4 fan motor fixing screws (5 × 25) to detach the
fan motor. (See Photo 2)
Service panel
fixing screws
Photo 1
Front panel Photo 2
Fan
Propeller
Fan motor fixing screws motor
Nut
Fan motor fixing screws
3. Removing the electrical parts box
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Disconnect the indoor/outdoor connecting wire from
terminal block.
(4) Remove all the following connectors from controller circuit board;
fan motor, LEV, thermistor <Outdoor pipe>,
thermistor <Discharge>, thermistor <Outdoor 2-phase pipe>,
thermistor <Outdoor>, high pressure switch, 4-way valve
coil.
Then remove a screw (4 × 8) from the valve bad to remove
the lead wire.
Pull out the disconnected wire from the electrical parts box.
<Diagram symbol in the connector housing>
• Fan motor (CNF1, CNF2)
• LEV (LEV-A)
• Thermistor <Outdoor pipe> (TH3)
• Thermistor <Discharge> (TH4)
• Thermistor <Outdoor 2-phase pipe, Outdoor> (TH6/7)
• High pressure switch (63H)
• 4-way valve (21S4)
• Bypass valve (SV2)
• Clankcase heater (SV1/CH)
(5) Remove the terminal cover and disconnect the
compressor lead wire.
(6) Remove an electrical parts box fixing screw (4 × 10) and
detach the electrical parts box by pulling it upward. The
electrical parts box is fixed with 2 hooks on the left and 1
hook on the right.
Photo 3
Controller circuit board
(C.B.)
Electrical
parts box
Electrical parts
box fixing screw
Terminal block
(TB1)
Valve bed
Screw
Compressor
(MC)
Terminal cover
Cover panel
(Front)
Cover panel fixing
screws
98
OPERATING PROCEDURE
PHOTOS
4. Removing the thermistor <Outdoor 2-phase pipe> (TH6)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Disconnect the connectors, TH6 and TH7 (red), on the
controller circuit board in the electrical parts box.
(4) Loosen the clamp for the lead wire in the rear of the
electrical parts box.
(5) Pull out the thermistor <Outdoor 2-phase pipe> (TH6)
from the sensor holder.
Thermistor
<Outdoor 2-phase pipe>
(TH6)
Photo 4
Note: In case of replacing thermistor <Outdoor 2-phase
pipe> (TH6), replace it together with thermistor
<Outdoor> (TH7) since they are combined together.
Refer to No.5 below to remove thermistor <Outdoor>.
Clamp
Electrical
parts box
5. Removing the thermistor <Outdoor> (TH7)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Disconnect the connector TH7 (red) on the controller circuit
board in the electrical parts box.
(4) Loosen the clamp for the lead wire in the rear of the
electrical parts box. (See Photo 4)
(5) Pull out the thermistor <Outdoor> (TH7) from the sensor
holder.
Photo 5
Note: In case of replacing thermistor <Outdoor> (TH7),
replace it together with thermistor <Outdoor 2-phase
pipe> (TH6), since they are combined together.
Refer to No.4 above to remove thermistor
<Outdoor 2-phase pipe>.
Lead wire of
thermistor
<Outdoor>
(TH7)
6. Removing the thermistor <Outdoor pipe> (TH3) and
thermistor <Discharge> (TH4)
(1) Remove the service panel. (See Figure 1)
(2) Disconnect the connectors, TH3 (white) and TH4 (white),
on the controller circuit board in the electrical parts box.
(3) Loosen the clamp for the lead wire in the rear of the
electrical parts box. (See Photo 4)
(4) Pull out the thermistor <Outdoor pipe> (TH3) (See Photo 7)
and thermistor <Discharge> (TH4) from the sensor holder.
Sensor holder
Photo 6
Thermistor
<Discharge>
(TH4)
Compressor
(MC)
99
PHOTOS
OPERATING PROCEDURE
Photo 7
7. Removing the 4-way valve coil (21S4), and LEV coil
(LEV(A))
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
LEV coil (LEV A)
LEV
[Removing the 4-way valve coil]
(3) Remove 4-way valve solenoid coil fixing screw
(M4 × 6).
(4) Remove the 4-way valve by sliding the coil toward you.
(5) Disconnect the connector 21S4 (green) on the controller
circuit board in the electrical parts box.
Lead wire of high Thermistor
pressure switch
<Outdoor pipe>
(TH3)
High pressure switch
[Removing the LEV coil]
(3) Remove the LEV coil by sliding the coil upward.
(4) Disconnect the connectors, LEV A (white) on the controller
circuit board in the electrical parts box.
8. Removing the 4-way valve
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove 3 valve bed fixing screws (4 × 10) and 4 ball
valve and stop valve fixing screws (5 × 16) and then
remove the valve bed.
(4) Remove 4 right side panel fixing screws (5 × 10) in the
rear of the unit and then remove the right side panel.
(5) Remove the 4-way valve.
Bypass valve
(6) Recover refrigerant.
coil (SV)
(7) Remove the welded part of 4-way valve.
Bypass
Note 1: Recover refrigerant without spreading it in the air.
valve coil
Note 2: The welded part can be removed easily by removfixing screw
ing the right side panel.
Note 3: When installing the 4-way valve, cover it with a
wet cloth to prevent it from heating (120°C or more),
then braze the pipes so that the inside of pipes
are not oxidized.
9. Removing LEV
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove 3 valve bed fixing screws (4 × 10) and 4 ball
valve and stop valve fixing screws (5 × 16) and then
remove the valve bed.
(4) Remove 4 right side panel fixing screws (5 × 10) in the
rear of the unit and then remove the right side panel.
(5) Remove the LEV.
(6) Recover refrigerant.
(7) Remove the welded part of LEV.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by removing the right side panel.
Note 3: When installing the LEV, cover it with a wet cloth
to prevent it from heating (120°C or more), then
braze the pipes so that the inside of pipes is not
oxidized.
100
4-way valve coil
(21S4)
4-way valve coil
fixing screw
4-way valve
OPERATING PROCEDURE
PHOTOS
10. Removing bypass valve coil (SV) and bypass valve
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove 3 right side panel fixing screws (5 × 10) in the
rear of the unit and remove the right side panel.
(4) Remove the bypass valve coil fixing screw (M4 × 6).
(5) Remove the bypass valve by sliding the coil upward.
(6) Disconnect the connector SV2 (blue) on the controller
circuit board in the electrical parts box.
(7) Recover refrigerant.
(8) Remove the welded part of bypass valve.
Photo 8
LEV
LEV coil (LEV A)
Lead wire of high
pressure switch
High pressure switch
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by
removing the right side panel.
11. Removing the high pressure switch (63H)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove 3 right side panel fixing screws (5 × 10) in the
rear of the unit and remove the right side panel.
(4) Pull out the lead wire of high pressure switch.
(5) Recover refrigerant.
(6) Remove the welded part of high pressure switch.
Note 1: Recover refrigerant without spreading it in the air.
Note 2: The welded part can be removed easily by
removing the right side panel.
Note 3: When installing the high pressure switch, cover it
with a wet cloth to prevent it from heating (100°C
or more), then braze the pipes so that the inside
of pipes are not oxidized.
12. Removing the reactor (DCL)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove the electrical parts box. (See Photo 3)
<Removing the reactor>
(4) Remove 4 reactor fixing screws (4 × 10) and remove the
reactor.
Bypass valve
coil (SV)
4-way valve coil
(21S4)
Bypass
valve coil
fixing screw
4-way valve
4-way valve coil
fixing screw
Photo 9
Reactor fixing screw
w The reactor is attached to the rear of the electrical parts box.
Reactor
(DCL)
Reactor fixing screws
101
Electrical parts box
OPERATING PROCEDURE
13. Removing the motor for compressor (MC)
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove 2 front cover panel fixing screws (5 × 10) and
remove the front cover panel. (See Photo 3)
(4) Remove 2 back cover panel fixing screws (5 × 10) and
remove the back cover panel.
(5) Remove the electrical parts box. (See Photo 3)
(6) Remove 3 valve bed fixing screws (4 × 10) and 4 ball valve
and stop valve fixing screws (5 × 16) and then remove the
valve bed.
(7) Remove 3 right side panel fixing screws (5 × 10) in the rear
of the unit and then remove the right side panel.
(8) Remove 3 separator fixing screws (4 × 10) and remove
the separator.
(9) Recover refrigerant.
(10) Remove the 3 points of the motor for compressor fixing
nut using a spanner or an adjustable wrench.
(11) Remove the welded pipe of motor for compressor inlet
and outlet and then remove the compressor.
PHOTOS
Photo 10
Accumulator
Terminal
cover
Compressor
(MC)
Note: Recover refrigerant without spreading it in the air.
Compressor
fixing nut
Accumulator leg
fixing screws
Accumulator
leg
14. Removing the Accumulator
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove 2 front cover panel fixing screws (5 × 10) and
remove the front cover panel. (See Photo 3.)
(4) Remove 2 back cover panel fixing screws (5 × 10) and
remove the back cover panel.
(5) Remove the electrical parts box. (See Photo 3)
(6) Remove 3 valve bed fixing screws (4 × 10) and 4 ball valve
and stop valve fixing screws (5 × 16) and then remove the
valve bed.
(7) Remove 3 right side panel fixing screws (5 × 10) in the
rear of the unit and then remove the right side panel.
(8) Recover refrigerant.
(9) Remove welded pipes of accumulator inlet and outlet.
(10) Remove 2 accumulator leg fixing screws (4 × 10).
Note: Recover refrigerant without spreading it in the air.
HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
CCopyright 2007 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Jul. 2009 No.OCH415 REVISED EDITION-C PDF 6
Distributed in Mar. 2009 No.OCH415 REVISED EDITION-B PDF 6
Distributed in Feb. 2008 No.OCH415 REVISED EDITION-A PDF 7
Distributed in Apr. 2007 No.OCH415 PDF 7
Made in Japan
New publication, effective Jul. 2009
Specifications subject to change without notice