Mitsubishi PUHZ-W85VHA2.UK User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES.................................. 2
2. SAFETY PRECAUTION................................... 3
3. SPECIFICATIONS............................................ 6
4. DATA ............................................................. 10
5. OUTLINES AND DIMENSIONS..................... 12
6. WIRING DIAGRAM........................................ 13
7. WIRING SPECIFICATIONS ........................... 16
8. REFRIGERANT SYSTEM DIAGRAM ............... 17
9. TROUBLESHOOTING ................................... 18
10. DISASSEMBLY PROCEDURE...................... 54
Notes:
•
This manual describes only
service data of outdoor unit.
•RoHS compliant products
have <G> mark on the
spec name plate.
R410A
PARTS CATALOG (OCB465)
Revision:
•Added
PUHZ-W85VHA2R5.UK and
PUHZ-W85VHA2R5-BS.UK
in REVISED EDITION-D.
•Some descriptions have
been modified.
•Please void OCH465
REVISED EDITION-C.
No. OCH465
REVISED EDITION-D
November 2015
AIR TO WATER HEAT PUMP
[Model Name]
PUHZ-W85VHA2
PUHZ-W85VHA2-BS
[Service Ref.]
PUHZ-W85VHA2.UK
PUHZ-W85VHA2R1.UK
PUHZ-W85VHA2R3.UK
PUHZ-W85VHA2R4.UK
PUHZ-W85VHA2R5.UK
PUHZ-W85VHA2-BS.UK
PUHZ-W85VHA2R1-BS.UK
PUHZ-W85VHA2R3-BS.UK
PUHZ-W85VHA2R4-BS.UK
PUHZ-W85VHA2R5-BS.UK

2
TECHNICAL CHANGES
1
PUHZ-W85VHA2.UK PUHZ-W85VHA2R1.UK
PUHZ-W85VHA2-BS.UK PUHZ-W85VHA2R1-BS.UK
1. Heat exchanger and plate heat exchanger have been changed.
2. Outdoor controller board has been changed.
PUHZ-W85VHA2R3.UK PUHZ-W85VHA2R4.UK
PUHZ-W85VHA2R3-BS.UK PUHZ-W85VHA2R4-BS.UK
1. A compliance with ErP directive Lot 1 has been authorized.
2. Outdoor controller board has been changed.
PUHZ-W85VHA2R1.UK PUHZ-W85VHA2R3.UK
PUHZ-W85VHA2R1-BS.UK PUHZ-W85VHA2R3-BS.UK
1. Added a new function "Energy Monitor" which allows remote controller to display power consumption and heat output.
Service ref. have been changed as follows.
PUHZ-W85VHA2R4.UK PUHZ-W85VHA2R5.UK
PUHZ-W85VHA2R4-BS.UK PUHZ-W85VHA2R5-BS.UK
1. The installation direction of LEV-B assy has been changed to reduce high frequency noise.
OCH465D

3
SAFETY PRECAUTION
2
Cautions for units utilizing refrigerant R410A
2-2. CAUTIONS RELATED TO NEW REFRIGERANT
2-1. ALWAYS OBSERVE FOR SAFETY
Before obtaining access to terminal, all supply circuits must be disconnected.
Charge refrigerant from liquid phase of gas cylinder.
If the refrigerant is charged from gas phase, composition change may occur in refrigerant and the efficiency
will be lowered.
Do not use refrigerant other than R410A.
If other refrigerant (R22, etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil, etc.
Use a vacuum pump with a reverse flow check valve.
Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil, etc.
Use the following tools specifically designed for use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant.
Handle tools with care.
If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction
of compressor.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.
Electronic refrigerant charging scale
Vacuum pump adaptor
Gauge manifold
Torque wrench
Gas leak detector
Charge hose
Tools for R410A
Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the spec labels provided with our products.
We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused
by failure to follow the instructions.
Use the specified refrigerant only.
OCH465D

4
[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.
[2] Additional refrigerant charge
When charging directly from cylinder
· Check that cylinder for R410A on the market is a syphon type.
· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specifications
1Gauge manifold · Only for R410A
· Use the existing fitting specifications. (UNF1/2)
· Use high-tension side pressure of 5.3 MPa·G or over.
2Charge hose · Only for R410A
· Use pressure performance of 5.09 MPa·G or over.
3Electronic scale —
4Gas leak detector · Use the detector for R134a, R407C or R410A.
5Adaptor for reverse flow check · Attach on vacuum pump.
6Refrigerant charge base —
7Refrigerant cylinder · Only for R410A Top of cylinder (Pink)
Cylinder with syphon
8Refrigerant recovery equipment —
OCH465D

5
Although "-BS" model has been designed to be resistant to salt damage, observe the following precautions to maintain the
performance of the unit.
1. Avoid installing the unit in a location where it will be exposed directly to seawater or sea breeze.
2. If the cover panel may become covered with salt, be sure to install the unit in a location where the salt will be washed away by
rainwater. (If a sunshade is installed, rainwater may not clean the panel.)
3. To ensure that water does not collect in the base of the outdoor unit, make sure that the base is level, not at angle. Water
collecting in the base of the outdoor unit could cause rust.
4. If the unit is installed in a coastal area, clean the unit with water regularly to remove any salt build-up.
5. If the unit is damaged during installation or maintenance, be sure to repair it.
6. Be sure to check the condition of the unit regularly.
7. Be sure to install the unit in a location with good drainage.
2-4. PRECAUTIONS FOR SALT PROOF TYPE "-BS" MODEL
2-3. CAUTIONS FOR REFRIGERANT PIPING WORK
Tools for R410A (The following table shows whether conventional tools can be used or not.)
Gauge manifold
Charge hose
Gas leak detector
Refrigerant recovery equipment
Refrigerant cylinder
Safety charger
Charge valve
Vacuum pump
Bender
Pipe cutter
Welder and nitrogen gas cylinder
Refrigerant charging scale
Vacuum gauge or thermis-
tor vacuum gauge and
vacuum valve
Charging cylinder
Air purge, refrigerant charge
and operation check
Gas leak check
Refrigerant recovery
Refrigerant charge
Prevent compressor malfunction
when charging refrigerant by
spraying liquid refrigerant
Prevent gas from blowing out
when detaching charge hose
Vacuum drying and air
purge
Bend the pipes
Cut the pipes
Weld the pipes
Charge refrigerant
Check the degree of vacuum. (Vacuum
valve prevents back flow of oil and refri-
gerant to thermistor vacuum gauge)
Refrigerant charge
Tool exclusive for R410A
Tool exclusive for R410A
Tool for HFC refrigerant
Tool exclusive for R410A
Tool exclusive for R410A
Tool exclusive for R410A
Tool exclusive for R410A
Tools for other refrigerants can
be used if equipped with adap-
ter for reverse flow check
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants can be used
Tools for other refrigerants
can be used
Tool exclusive for R410A
Tools and materials Use R410A tools Can R22 tools be used?
(Usable if equipped
with adapter for rever-
se flow)
Can R407C tools be used?
(Usable if equipped
with adapter for rever-
se flow)
: 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.
OCH465D

6
SPECIFICATIONS
3
3-1. SPECIFICATIONS
PUHZ-W85VHA2.UK PUHZ-W85VHA2-BS.UK
noitidnocgnitarepolanimoN)ycneuqerF,egatloV,esahP(ylppusrewoP
Nominal water flow rate (Heating mode) L/min Heating(A7/W35)
Heating 7°C+)blub-yrD(erutarepmetriaedistuOWkyticapaC
(A7/W35) 6°C+)blub-teW(erutarepmetriaedistuOPOC
5°C3+/03+)teltuo/telni(erutarepmetretaWWktupnirewoP
Heating WkyticapaC Heating(A2/W35)
(A2/W35) 2°C+)blub-yrD(erutarepmetriaedistuOPOC
1°C+)blub-teW(erutarepmetriaedistuOWktupnirewoP
Pressure difference (water circuit) )teltuo/telni(erutarepmetretaWaPk －/+35°C
Heating pump input (based on EN14511) kW Cooling(A35/W7)
5°C3+)blub-yrD(erutarepmetriaedist
uOnim/L)edomgnilooC(etarwolfretawlanimoN
Cooling 4°C
2+)blub-teW(erutarepmetriaedistuOWkyticapaC
(A35/W7) EER
(COP) Water temperature (inlet/outlet) +12/+7°C
Power input kW Cooling(A35/W18)
Cooling 5°C3+)blub-yrD(erutarepmetriaedistuOWkyticapaC
(A35/W18) EER
(COP) Outside air temperature (Wet-bulb) + 24°C
8°C1+/32+)teltuo/telni(erutarepmetretaWWktupnirewoP
Pressure difference (water circuit) kPa
Cooling pump input (based on EN14511) kW
Note: "Capacity", "COP" and "Power input" in the above table are values that contains the "pump input (based on EN 14511) ".
regnahcxetaehetalPsnoitacificepstinuroodtuO
Service Ref. ALFA LAVAL
Running current Heating
(A7/W35) 05–03HCAA
Cooling
(A35/W7) A
Power factor Heating
(A7/W35) mm4.04:A%
Cooling
(A35/W7) mm2.862:B%
Atnerruc.xaM
mm39:WAezisrekaerB
mm523:HgnisacretuO
mm84:DhsiniflanretxE
setalp05l
ortnoctnaregirfeR
Compressor
Model
Motor output kW
Start type
Protection devices
Maximum outlet water temperature
Oil (Model) L
WretaehesacknarC
Heat exchanger Air
Water
Fan Fan(drive)×No.
Fan motor output
kW
Air flow m³/min
(CFM)
Defrost method
Noise level Heating dB
Cooling dB
Dimensions Width mm (in)
Depth mm (in)
Height mm (in)
)bl(gkthgieW
Refrigerant
*1 Hot gas with 4-way valve
Quantity kg (lb)
*2 At distance of 1m from outdoor unit
Guaranteed operating Heating °C
°C
°C
°C
°C
°C
*3 Grille
range (Outdoor) Cooling
Outlet water temp. Heating
(Max in heating, Min in cooling)
Cooling
Nominal return water Heating
temperature range Cooling
nim/LegnaretarwolfretaW
*4 With the optional air outlet guide, the operation at
−15°C outdoor temperature is possible.
48
*2
0.67 (FV50S)
943 (37-1/8)
R410A
(1,730)
Reverse cycle
*1
Propeller fan × 1
0.060
10.0 to +25.8
2.4 (5.3)
−20 to +35
−5 to +46
(*4)
*5
+5 to +59
+8 to +28
+60
+5
(Min. 2.60) 8.50
0.02
2.68
13.5
21.5
7.50
7.50
3.93
9.38
Galvanized plate
0.012
Hermetic twin rotary
13.15
PUHZ-W85VHA2(-BS).UK
25.8
79 (174)
950 (37-3/8)
330 +30
(*3)
(13+1-3/16)
23.0
HP switch
Discharge thermo
Comp. surface thermo
48
*2
-
1.3
1, 230 V, 50 Hz
25
2.47
1.91
(Min. 2.70) 9.00
4.18
3.04
10
2.15
3.17
TNB220FLHM1T
98
98
Linear expansion valve
Munsell 3Y 7.8/1.1
49
Plate fin coil
Plate heat exchanger
Inverter
W
H
D
Water OUT
Water IN
Ref. IN
(Heating)
Ref. OUT
(Heating)
Thermistor
( TH 32)
A
B
40
45
50
55
60
65
-20 -15 -10 -5 0 5 10
Ambient temperature [ °C ]
Maximum outlet water temperature [
°C
]
(SPL)
*5 For details of the min. return water temperature at
each water flow rate, refer to “3-2. AVAILABLE RANGE
(WATER FLOW RATE, RETURN WATER TEMP.)”.
Note: We confirm that our units are tested based on EN14511.
OCH465D

7
PUHZ-W85VHA2R1.UK PUHZ-W85VHA2R1-BS.UK
PUHZ-W85VHA2R3.UK PUHZ-W85VHA2R3-BS.UK
noitidnocgnitarepolanimoN)ycneuqerF,egatloV,esahP(ylppusrewoP
Nominal water flow rate (Heating mode) L/min Heating(A7/W35)
Heating 7°C+)blub-yrD(erutarepmetriaedistuOWkyticapaC
(A7/W35) 6°C+)blub-teW(erutarepmetriaedistuOPOC
5°C3+/03+)teltuo/telni(erutarepmetretaWWktupnirewoP
Heating WkyticapaC Heating(A2/W35)
(A2/W35) 2°C+)blub-yrD(erutarepmetriaedistuOPOC
1°C+)blub-teW(erutarepmetriaedistuOWktupnirewoP
Pressure difference (water circuit) )teltuo/telni(erutarepmetretaWaPk －/+35°C
Heating pump input (based on EN14511) kW Cooling(A35/W7)
5°C3+)blub-yrD(erutarepmetriaedis
tuOnim/L)edomgnilooC(etarwolfretawlanimoN
Cooling 4°C
2+)blub-teW(erutarepmetriaedistuOWkyticapaC
(A35/W7) EER
(COP) Water temperature (inlet/outlet) +12/+7°C
Power input kW Cooling(A35/W18)
Cooling 5°C3+)blub-yrD(erutarepmetriaedistuOWkyticapaC
(A35/W18) EER
(COP) Outside air temperature (Wet-bulb) + 24°C
8°C1+/32+)teltuo/telni(erutarepmetretaWWktupnirewoP
Pressure difference (water circuit) kPa
Cooling pump input (based on EN14511) kW
Note: "Capacity", "COP" and "Power input" in the above table are values that contains the "pump input (based on EN 14511) ".
regnahcxetaehetalPsnoitacificepstinuroodtuO
Service Ref. MITSUBISHI
Running current Heating
(A7/W35)
MWA1–44LM
A
Cooling
(A35/W7) A
Power factor Heating
(A7/W35)
39 mm:A
%
Cooling
(A35/W7)
mm2.862:B
%
Atnerruc.xaM mm39:W
AezisrekaerB mm523:H
gnisacretuO 77.1 mm:D
hsiniflanretxE setalp44
lortnoctnare
girfeR
Compressor
Model
Motor output kW
Start type
Protection devices Maximum outlet water temperature
Oil (Model) L
WretaehesacknarC
Heat exchanger Air
Water
Fan Fan(drive)×No.
Fan motor output
kW
Air flow m³/min
(CFM)
Defrost method
Noise level Heating dB
Cooling dB
Dimensions Width mm (in)
Depth mm (in)
Height mm (in)
)bl(gkthgieW
Refrigerant
*1 Hot gas with 4-way valve
Quantity kg (lb)
*2 At distance of 1m from outdoor unit
Guaranteed operating Heating °C
°C
°C
°C
°C
°C
*3 Grille
range (Outdoor) Cooling
Outlet water temp. Heating
(Max in heating, Min in cooling)
Cooling
Nominal return water Heating
temperature range Cooling
nim/LegnaretarwolfretaW
*4 With the optional air outlet guide, the operation at
−15°C outdoor temperature is possible.
48 *2
0.67 (FV50S)
943 (37-1/8)
R410A
(1,730)
Reverse cycle *1
Propeller fan × 1
0.060
10.0 to +25.8
2.4 (5.3)
−20 to +35
−5 to +46
(*4)
*5
+5 to +59
+8 to +28
+60
+5
(Min. 2.60) 8.50
0.02
2.68
13.5
21.5
7.50
7.50
3.93
9.38
Galvanized plate
0.012
Hermetic twin rotary
13.15
PUHZ-W85VHA2R1(-BS).UK
PUHZ-W85VHA2R3(-BS).UK
25.8
79 (174)
950 (37-3/8)
330 +30*3 (13+1-3/16)
23.0
HP switch
Discharge thermo
Comp. surface thermo
overcurrent detection
48 *2
-
1.3
1, 230 V, 50 Hz
25
2.47
1.91
(Min. 2.70) 9.00
4.18
3.04
10
2.15
3.17
TNB220FLHM1T
98
98
Linear expansion valve
Munsell 3Y 7.8/1.1
49
Plate fin coil
Plate heat exchanger
Inverter
W
H
D
Water OUT
Water IN
Ref. IN
(Heating)
Ref. OUT
(Heating)
Thermistor
( TH 32)
A
B
40
45
50
55
60
65
−15 −10 −5 0 5 10
Ambient temperature [
°C
]
Maximum outlet water temperature [
°C
]
(SPL)
*5 For details of the min. return water temperature at
each water flow rate, refer to “3-2. AVAILABLE RANGE
(WATER FLOW RATE, RETURN WATER TEMP.)”.3-2. AVAILABLE RANGE
(WATER FLOW RATE, RETURN WATER TEMP.)”.
Note: We confirm that our units are tested based on EN14511.
−20
OCH465D

8
PUHZ-W85VHA2R4.UK PUHZ-W85VHA2R4-BS.UK
noitidnocgnitarepolanimoN)ycneuqerF,egatloV,esahP(ylppusrewoP
Nominal water flow rate (Heating mode) L/min Heating(A7/W35)
Heating 7°C+)blub-yrD(erutarepmetriaedistuOWkyticapaC
(A7/W35) 6°C+)blub-teW(erutarepmetriaedistuOPOC
5°C3+/03+)teltuo/telni(erutarepmetretaWWktupnirewoP
Heating WkyticapaC Heating(A2/W35)
(A2/W35) 2°C+)blub-yrD(erutarepmetriaedistuOPOC
1°C+)blub-teW(erutarepmetriaedistuOWktupnirewoP
Pressure difference (water circuit) )teltuo/telni(erutarepmetretaWaPk －/+35°C
Heating pump input (based on EN14511) kW Cooling(A35/W7)
5°C3+)blub-yrD(erutarepmetriaedist
uOnim/L)edomgnilooC(etarwolfretawlanimoN
Cooling 4°C
2+)blub-teW(erutarepmetriaedistuOWkyticapaC
(A35/W7) EER
(COP) Water temperature (inlet/outlet) +12/+7°C
Power input kW Cooling(A35/W18)
Cooling 5°C3+)blub-yrD(erutarepmetriaedistuOWkyticapaC
(A35/W18) EER
(COP) Outside air temperature (Wet-bulb) + 24°C
8°C1+/32+)teltuo/telni(erutarepmetretaWWktupnirewoP
Pressure difference (water circuit) kPa
Cooling pump input (based on EN14511) kW
Note: "Capacity", "COP" and "Power input" in the above table are values that contains the "pump input (based on EN 14511) ".
regnahcxetaehetalP
snoitacificepstinuroodtuO
Service Ref. MITSUBISHI
Running current Heating
(A7/W35)
MWA1–44LM
A
Cooling
(A35/W7) A
Power factor Heating
(A7/W35)
39 mm:A
%
Cooling
(A35/W7)
mm2.862:B
%
Atnerruc.xaM
mm39:W
AezisrekaerB
mm523:H
gnisacretuO
77.1 mm:D
hsiniflanretxE
setalp44
lortnoctnareg
irfeR
Compressor
Model
Motor output kW
Start type
Protection devices
Maximum outlet water temperature
Oil (Model) L
WretaehesacknarC
Heat exchanger Air
Water
Fan Fan(drive)×No.
Fan motor output
kW
Air flow m³/min
(CFM)
Defrost method
Noise level Heating dB
Cooling dB
Dimensions Width mm (in)
Depth mm (in)
Height mm (in)
)bl(gkthgieW
Refrigerant
*1 Hot gas with 4-way valve
Quantity kg (lb)
*2 At distance of 1m from outdoor unit
Guaranteed operating Heating °C
°C
°C
°C
°C
°C
*3 Grille
range (Outdoor) Cooling
Outlet water temp. Heating
(Max in heating, Min in cooling)
Cooling
Nominal return water Heating
temperature range Cooling
nim/LegnaretarwolfretaW
*4 With the optional air outlet guide, the operation at
−15°C outdoor temperature is possible.
48
*2
0.67 (FV50S)
943 (37-1/8)
R410A
(1,730)
Reverse cycle
*1
Propeller fan × 1
0.074
10.8 to +25.8
2.4 (5.3)
−20 to +21
−5 to +46
(*4)
*5
+5 to +59
+8 to +28
+60
+5
(Min. 2.60) 8.50
0.046
2.68
13.5
21.5
7.50
7.50
3.93
9.38
Galvanized plate
0.033
Hermetic twin rotary
13.15
PUHZ-W85VHA2R4(-BS).UK
PUHZ-W85VHA2R5(-BS).UK
25.8
79 (174)
950 (37-3/8)
330 +30
*3
(13+1-3/16)
23.0
HP switch
Discharge thermo
Comp. surface thermo
overcurrent detection
48
*2
-
1.3
1, 230 V, 50 Hz
25
2.47
1.91
(Min. 2.70) 9.00
4.18
3.04
10
2.15
3.17
TNB220FLHM1T
98
98
Linear expansion valve
Munsell 3Y 7.8/1.1
49
Plate fin coil
Plate heat exchanger
Inverter
W
H
D
Water OUT
Water IN
Ref. IN
(Heating)
Ref. OUT
(Heating)
Thermistor
( TH 32)
A
B
40
45
50
55
60
65
−15 −10 −5 0 5 10
Ambient temperature [
°C
]
Maximum outlet water temperature [
°C
]
(SPL)
*5 For details of the min. return water temperature at
each water flow rate, refer to “3-2. AVAILABLE RANGE
(WATER FLOW RATE, RETURN WATER TEMP.)”.3-2. AVAILABLE RANGE
(WATER FLOW RATE, RETURN WATER TEMP.)”.
Note: We confirm that our units are tested based on EN14511.
−20
PUHZ-W85VHA2R5.UK PUHZ-W85VHA2R5-BS.UK
OCH465D

9
3-2. AVAILABLE RANGE (WATER FLOW RATE, RETURN WATER TEMP.)
Note: If the value of water flow rate and return water temp. become lower than the available range, it
could cause damage to the parts of unit.
<Heating>
Table 1
10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0
Water flow rate [L/min]
5.0
7.0
9.0
11.0
13.0
15.0
17.0
19.0
Return water temp [:]
<Applicable Models>
• PUHZ-W85VHA2(-BS).UK
• PUHZ-W85VHA2R1(-BS).UK
• PUHZ-W85VHA2R3(-BS).UK
• PUHZ-W85VHA2R4(-BS).UK
• PUHZ-W85VHA2R5(-BS).UK
<Applicable Models>
• PUHZ-W85VHA2(-BS).UK
• PUHZ-W85VHA2R1(-BS).UK
• PUHZ-W85VHA2R3(-BS).UK
• PUHZ-W85VHA2R4(-BS).UK
• PUHZ-W85VHA2R5(-BS).UK
12.010.0 14.0 16.0 20.0 22.0 24.0
Table 2
Water flow rate [L/min]
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
Return water temp [:]
18.0
Available range
Available range
<Cooling>
OCH465D

10
DATA
4
1.5m
1m
MICROPHONE
UNIT
GROUND
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
90
80
70
60
50
40
30
20
10
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar)
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
BAND CENTER FREQUENCIES, Hz
PUHZ-W85VHA2(-BS).UK
PUHZ-W85VHA2R1(-BS).UK
PUHZ-W85VHA2R3(-BS).UK
PUHZ-W85VHA2R4(-BS).UK
PUHZ-W85VHA2R5(-BS).UK
COOLING
MODE
HEATING
48
SPL(dB)
48
LINE
4-1. NOISE CRITERION CURVES
OCH465D

11
4-2. STANDARD OPERATION DATA
Mode
Cooling
(A35/W7)
Heating
(A7/W35)
Total
Capacity W 7,500 9,000
Input kW 3.04 2.15
Electrical circuit
Outdoor unit PUHZ-W85VHA2
Phase, Hz 1, 50
Voltage V 230
Current A 13.15 9.38
Refrigerant circuit
Discharge pressure MPa 2.81 2.16
Suction pressure MPa 0.73 0.64
Discharge temperature ºC 80 65
Condensing temperature ºC 46 37
Suction temperature ºC 3 -1
Water
conditions
Flow volume L/min 21.5 25.8
Outlet water temperature ºC 7 35
Outdoor
conditions
Intake air
temperature
D.B. ºC 35 7
W.B. ºC 24 6
The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is: 1 (MPa) = 10.2 (kgf/cm²)
We confirm that our units are tested based on EN 14511.
OCH465D

12
OUTLINES AND DIMENSIONS
5
Unit: mm
PUHZ-W85VHA2.UK PUHZ-W85VHA2R1.UK PUHZ-W85VHA2R3.UK
PUHZ-W85VHA2-BS.UK PUHZ-W85VHA2R1-BS.UK PUHZ-W85VHA2R3-BS.UK
PUHZ-W85VHA2R4.UK PUHZ-W85VHA2R5.UK
PUHZ-W85VHA2R4-BS.UK PUHZ-W85VHA2R5-BS.UK
Rear Air Intake
Side Air Intake
Air Discharge 2-12 x 36 oval holes
(Foundation Bolt M10)
2-U Shaped notched holes (Foundation Bolt M10)
Installation Feet
53
417
37028
175 175600
19
33030
Drain hole (5-[33)
30
81 219
220 145145145
Handle for moving
Side Air Intake
Handle for moving
Rear Air Intake
Water IN
Air Intake
Water OUT
Handle for moving
57
Power supply wiring hole (2-[27 knockout)
See Detail
Side Panel R
Front cover
34
40119
Detail
ISO 228/1-G1 B
98 269
24
Service panel
Handle for moving
Handle for moving
Terminal Connections Left...Power supply wiring Right...Controller wiring
Earth terminal
322
943
23
473
950
662
FOUNDATION
<Foundation bolt height>
Please secure the unit firmly with 4 foundation (M10) bolts. (Bolts and washers must be purchased locally.)
Service space
Dimensions of space needed for service access are shown in the below diagram.
FREE
Over 300mm
Over 10mm
The diagram below shows a basic example. Explanation of particular details are given in the installation manuals etc.
Over 500mm
Over 10mm
1 FREE SPACE (Around the unit) 2 SERVICE SPACE 3 FOUNDATION BOLTS
Less than
Over
Over
Over300
500
500
Over10
30
OCH465D

13
6WIRING DIAGRAM
PUHZ-W85VHA2.UK PUHZ-W85VHA2-BS.UK
TB1
MC
MF1
21S4
63H
TH3
TH4
TH6
TH7
TH8
LEV-A, LEV-B
DCL
Terminal Block <
Power Supply,Interface unit /
Flow temp. controller>
Motor for Compressor
Fan Motor
Solenoid Valve <Four-Way Valve>
High Pressure Switch
63HS High Pressure Sensor
SV Solenoid Valve <Bypass Valve>
Thermistor < Liquid>
Thermistor <Discharge>
Thermistor <Plate HEX Iiquid>
Thermistor <Ambient>
Thermistor <Heat sink>
TH32 Thermistor <Inlet water>
TH33 Thermistor <Comp. Surface>
Electronic Expansion Valve
Reactor
ACTM Active Filter Module
CY1,CY2 Capacitor
Power Circuit Board
Connection Terminal
< U/V/W-Phase>
P.B.
TABS/T
Noise Filter Circuit Board
Connection Terminal
< L-Phase>
Connection Terminal
< Ground>
N.F.
LI,LO
Connection Terminal < N-Phase>
NI,NO
EI,E2
Controller Circuit Board
Connector
< Connection for Option>
Connector < Connection for Option(Contact Input) >
Switch < Function Switch>
Switch
< Function Switch>
Switch
< Function Switch>
Switch
< Function Switch>
SW1
SV1
CNDM
SW2
SW6
SW8
LED3
LED < Operation/Inspection Indicators>
C.B.
TABP1/P2
Power Module IPM
Diode bridge DS2, DS3
52C Relay
52C
SYMBOL NAME SYMBOL NAME
Connection Terminal < L/N-Phase>
Connection Terminal
< DC Voltage>
TABN1/N2
Connection Terminal < DC Voltage>
TABU/V/W
Switch < Model Select>
Switch
< Model Select>
SW5
SW10
Relay
Fuse
< T6.3AL250V>
F1 F4
X52, X54, X55
SW7
Switch < Function Switch>
MS
3
MF1
(
M
1
3
1
7
34 11 1 2 1
1 7
2
CNF1
(WHT)
TRANS
CNDC
(PNK)
TH7/6
(RED)
TH3
(WHT)
TH4
(WHT)
TH7
t° t° t° t°
TH6 TH3 TH4
1 2
TH32
(BLK)
t°
TH32
1 2
TH33
(YLW)
t°
TH33 63HS
63HS
(WHT)
31
CNS
(WHT)
63H
(YLW)
3
1
63H
1
1
C. B.
P. B.
N. F.
SW6
SW1
SW8
SW2
SW5
SW10
LED3
2
22
7
CN2
(WHT)
F3
1 2 1 2
1313
13
2
71
1
2
1
2
1
2
7
6
CNAC
(WHT)
CN4
(WHT)
12
34
F4
F2
F1 21S4
(GRN)
SV2
(BLU)
X52 X55
13 SV1
(GRY)
X54
21S4 SV
2
2
LN
CNDC
(PNK)
DS2
DS3
TABN
TABP
IPM
U
TABP2
TABV
TABW
TABN2
TABN1
TABS
TABP1
TABT
TABU
MS
3
UVW
MC
CN2
(WHT)
41
CNAF
(WHT)
CN4
(WHT)
CN5
(RED)
CN3
(WHT)
RED
RED
WHT WHT
WHT
WHT BLK
BLU
RED
BLU
BRN
ORN
YLW
GRN/YLW
BLK
TH8
t°
161 3 15
CNVMNT
(WHT)
CNMNT
(WHT)
LEV-A
(WHT)
LEV-A
1
5
CN51
(WHT)
1
3
CNDM
(WHT)
1
3
CN3S
(WHT)
DCL
ACTM
L1
LO
52C
NO
LI NI
CN5
(RED)
L2
N2
Io
N1
P
4
1 6
RED
BLK
BLK
BLK
RED
WHT
RED
BLU
CNAC2
(RED)
CNAC1
(WHT)
CN52C
(BLK)
WHT
2
2
1
3
E2
EI
U
U
1
2
1
2
3
1
TB1
CY1
CY2
S1 S2 S3
RED
POWER SUPPLY
/ N 230V 50Hz
Interface unit /
Flow temp. controller
M
61
LEV-B
(RED)
CN52C
(RED)
LEV-B
BLU
WHT
0 0 1 0 1 1
1 2 3 4 5 6
SW6
1 MODEL SELECT
1=ON, 0=OFF
0 1
1 2
SW10
SW7
OCH465D

14
TB1
MC
MF1
21S4
63H
TH3
TH4
TH6
TH7
TH8
LEV-A, LEV-B
DCL
Terminal Block
<Power Supply,Interface unit /
Flow temp. controller>
Motor for Compressor
Fan Motor
Solenoid Valve(Four-Way Valve)
High Pressure Switch
63HS High Pressure Sensor
SV Solenoid Valve<Bypass Valve>
Thermistor<Liquid>
Thermistor<Discharge>
Thermistor<Plate HEX Liquid>
Thermistor<Ambient>
Thermistor<Heat Sink>
TH32 Thermistor<Inlet Water>
TH33 Thermistor<Comp. Surface>
Linear Expansion Valve
Reactor
ACTM Active Filter Module
CY1, CY2 Capacitor
Power Circuit Board
Connection Terminal<U/V/W-Phase>
P. B.
TABS/T
Noise Filter Circuit Board
Connection Terminal<L-Phase>
Connection Terminal<Ground>
N. F.
LI, LO
Connection Terminal<N-Phase>
NI, NO
EI, E2
Controller Circuit Board
Connector<Connection for Option>
Connector<Connection for Option>
Switch<Function Switch>
Switch<Function Switch>
Switch<Function Switch, Model Select>
Switch<Function Switch>
SW1
SV1
CNDM
SW2
SW6
SW8
Switch<Function Switch>
SW7
LED3
LED<Operation/Inspection Indicators>
C. B.
TABP1/P2
Power Module IPM
Diode bridge DS2, DS3
52C Relay
52C
SYMBOL NAME SYMBOL NAME
Connection Terminal<L/N-Phase>
Connection Terminal<DC Voltage>
TABN1/N2
Connection Terminal<DC Voltage>
TABU/V/W
Switch<Model Select>
Switch<Function Switch, Model Select>
SW5
SW10
Relay
Fuse<T6.3AL250V>
F1, F2, F3, F4
X52, X54, X55
*1 MODEL SELECT
*2. SW5 -1 to 3 : Function Switch
SW10 -1 : Function Switch
1 2 3 4 5 6
OFF
ON
SW6SW5-4 *2
OFF
ON
1 2 3 4
SW10-2 *2
OFF
ON
1 2
The black square ( ) indicates a switch position.
M
1
3
1
7
34 11 1 2 1
1 7
2
CNF1
(WHT)
TRANS
CNDC
(PNK)
TH7/6
(RED)
TH3
(WHT)
TH4
(WHT)
TH7
t°t°t°t°
TH6 TH3 TH4
1 2
TH32
(BLK)
t°
TH32
1 2
TH33
(YLW)
t°
TH33 63HS
63HS
(WHT )
31
CNS
(WHT )
63H
(YLW)
3
1
63H
*
1
*
1
*
1
C. B.
P. B.
N. F.
SW6
SW1
SW8
SW2 SW7
SW5
SW10
LED3
2
22
7
CN2
(WHT)
F3
1 2 1 2
1313
13
2
71
1
2
1
2
1
2
7
6
CNAC
(WHT)
CN4
(WHT)
12
34
F4
F2
F1 21S4
(GRN)
SV2
(BLU)
X52 X55
13 SV1
(GRY)
X54
21S4 SV
2
2
LN
CNDC
(PNK)
DS2
DS3
TABN
TABP
IPM
TABP2
TABV
TABW
TABN2
TABN1
TABS
TABP1
TABT
TABU
MS
3 ~
UVW
MC
CN2
(WHT)
41
CNAF
(WHT)
CN4
(WHT)
CN5
(RED)
CN3
(WHT)
RED
RED
WHT WHT
WHT
WHT
BLK
BLU
RED
BLU
BRN
ORN
YLW
GRN/YLW
BLK
TH8
t°
161 3 15
CNVMNT
(WHT)
CNMNT
(WHT)
LEV-A
(WHT)
LEV-A
1
5
CN51
(WHT)
1
3
CNDM
(WHT)
1
3
CN3S
(WHT)
DCL
ACTM
L1
LO
52C
NO
LI NI
CN5
(RED)
L2
N2
Io
N1
P
4
1 6
RED
BLK
BLK
BLK
RED
WHT
RED
BLU
CNAC2
(RED)
CNAC1
(WHT)
CN52C
(BLK)
WHT
2
2
1
3
E2
EI
1
2
1
2
3
1
TB1
CY1
CY2
S1 S2 S3
RED
POWER SUPPLY
~ / N 230V 50Hz
Interface unit /
Flow temp. controller
M
61
LEV-B
(RED)
CN52C
(RED)
LEV-B
BLU
WHT
MS
3~
MF1
PUHZ-W85VHA2R1.UK PUHZ-W85VHA2R3.UK PUHZ-W85VHA2R4.UK
PUHZ-W85VHA2R1-BS.UK PUHZ-W85VHA2R3-BS.UK PUHZ-W85VHA2R4-BS.UK
OCH465D

15
PUHZ-W85VHA2R5.UK PUHZ-W85VHA2R5-BS.UK
TB1
MC
MF1
21S4
63H
TH3
TH4
TH6
TH7
TH8
LEV-A, LEV-B
DCL
Terminal Block
<Power Supply, Indoor/Outdoor>
Motor for Compressor
Fan Motor
Solenoid Valve (4-Way Valve)
High Pressure Switch
63HS
High Pressure Sensor
SV Solenoid Valve (Bypass Valve)
Thermistor <Liquid>
Thermistor <Discharge>
Thermistor <Plate HEX Liquid>
Thermistor <Ambient>
Thermistor <Heat Sink>
TH32 Thermistor <Inlet Water>
TH33 Thermistor <Comp. Surface>
Linear Expansion Valve
Reactor
ACTM Active Filter Module
CY1, CY2 Capacitor
Power Circuit Board
P. B.
Noise Filter Circuit Board N. F.
Controller Circuit Board
Connector <Connection for Option>
Connector <Connection for Option>
Switch <Manual Defrost, Defect History
Record Reset, Function Switch>
Switch <Function Switch>
Switch <Function Switch, Model Select>
Switch <Function Switch>
SW1
CNDM
SV1
SW2
SW6
SW8
Switch <Function Switch>
SW7
C. B.
SYMBOL NAME SYMBOL NAME
Switch <Model Select>
Switch <Function Switch, Model Select>
SW5
SW10
Fuse <T6.3AL250V>
F1, F2, F3, F4
M
1
3
1
7
34 11 1 2 1
1 7
2
CNF1
(WH)
TRANS
CNDC
(PK)
TH7/6
(RD)
TH3
(WH)
TH4
(WH)
TH7
t°t°t°t°
TH6 TH3 TH4
1 2
TH32
(BK)
t°
TH32
1 2
TH33
(YE)
t°
TH33 63HS
63HS
( WH)
31
CNS
( WH)
63H
(YE)
3
1
63H
*
1
*
1
*
1
C. B.
P. B.
N. F.
SW6
SW1
SW8
SW2 SW7
SW5
SW10
LED3
2
22
7
CN2
(WH)
F3
1 2 1 2
1313
13
2
71
1
2
1
2
1
2
7
6
CNAC
(WH)
CN4
(WH)
12
34
F4
F2
F1 21S4
(GN)
SV2
(BU)
X52 X55
13 SV1
(GY)
X54
21S4 SV
2
2
LN
CNDC
(PK)
DS2
DS3
TABN
TABP
IPM
TABP2
TABV
TABW
TABN2
TABN1
TABS
TABP1
TABT
TABU
MS
3
~
UVW
MC
CN2
(WH)
41
CNAF
(WH)
CN4
(WH)
CN5
(RD)
CN3
(WH)
RD
RD
WH WH
WH
BK
BK
BU
RD
BU
BN
OG
YE
GNYE
BK
TH8
t°
161 3 15
CNVMNT
(WH)
CNMNT
(WH)
LEV-A
(WH)
LEV-A
1
3
CNDM
(WH)
DCL
ACTM
L1
LO NO
LI NI
CN5
(RD)
L2
N2
Io
N1
P
4
1 6
RD
BK
BK
BK
RD
WH
RD
BU
CNAC2
(RD)
CNAC1
(WH)
CN52C
(BK)
WH
2
2
1
3
E2
EI
1
2
1
2
3
1
TB1
CY1
CY2
S1 S2 S3
RD
POWER SUPPLY
~/N 230V 50Hz
TO INDOOR UNIT
M
61
LEV-B
(RD)
CN52C
(RD)
LEV-B
BU
WH
*1 MODEL SELECT
*2 SW5 -1 to 3 : Function Switch
SW10 -1 : Function Switch
1 2 3 4 5 6
OFF
ON
SW6SW5-4 *2
OFF
ON
1 2 3 4
MODEL
85V
SW10-2 *2
OFF
ON
1 2
The black square ( ) indicates a switch position.
MS
3~
MF1
OCH465D

16
WIRING SPECIFICATIONS7
FIELD ELECTRICAL WIRING (power wiring specifications)
Caution: Be sure to install N-line. Without N-line, it could damage the unit.
Notes: 1. Wiring size must comply with the applicable local and national codes.
2.
Power supply cables and the cables between Controller and Outdoor unit shall not be lighter than polychloroprene sheathed
exible cables. (Design 60245 IEC 57 )
3. Be sure to connect the cables between Controller and Outdoor unit directly to the units (no intermediate connections are al-
lowed).
Intermediate connections may result in communication errors. If water enters at the intermediate connection point, it may
cause insufcient insulation to ground or a poor electrical contact .
4. Install an earth longer than other cables.
5. Do not construct a system with a power supply that is turned ON and OFF frequently.
ledomtinuroodtuO 85V
Outdoor unit power supply ~/N (single), 50 Hz, 230 V
25A1*yticapacrekaerBtiucriCtinuroodtuO
Wiring
Wire No. ×
size (mm²)
htrae,ylppusrewoptinuroodtuO
Interface unit/Flow temp. controller-Outdoor unit *2 3 × 1.5 (polar)
1 × Min. 1.5
3 × Min. 4
2 × 0.3 (Non-polar)
230 V DC
230 V DC
24 V DC
12 V DC
Interface unit/Flow temp. controller-Outdoor unit earth *2
Remote controller-Interface unit/Flow temp. controller
Circuit rating
Outdoor unit L-N (single) *3
Interface unit/Flow temp. controller-Outdoor unit S1-S2 *3
Interface unit/Flow temp. controller-Outdoor unit S2-S3 *3
Remote controller-Interface unit/Flow temp. controller *3
*1. A breaker with at least 3.0 mm contact separation in each poles shall be provided. Use earth leakage breaker (NV).
Make sure that the current leakage breaker is one compatible with higher harmonics.
Always use a current leakage breaker that is compatible with higher harmonics as this unit is equipped with an inverter.
The use of an inadequate breaker can cause the incorrect operation of inverter.
*2.Maximum 80 m
*3.The figures are NOT always against the ground.
S3 terminal has 24 V DC against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulated by the transformer or other device.
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 Interface unit/Flow temp. controller and outdoor unit, please use 3-pole type.
S1
S2
S3
S1
S2
S3
A-Control
Outdoor Unit
3 poles isolator
Power supply
Isolator
Interface unit/
Flow temp. controller
OCH465D

17
REFRIGERANT SYSTEM DIAGRAM8
Distributor
TH7
Strainer(#100) Strainer(#100)
Receiver
LEV-B
TH6
TH32
Plate HEX
Water IN
Water OUT
Strainer
(#100)
TH3
CHECK/V
CHECK/V CHECK/V
H/P SW
TH4
TH8 P/B
LEV-A
COMP
REV/V
P-Sensor
S/V
Strainer
(#100)
TH33
Refrigerant flow in heating
Refrigerant flow in cooling
Symbol Part name Detail
COMP Compressor DC inverter twin rotary compressor (Mitsubishi Electric Corporation)
H/P SW High pressure switch (63H) For protection (OFF: 4.15MPa)
Plate HEX Plate Heat Exchanger ACH30-50 Plates (Alfa Laval) (for PUHZ-W85VHA2(-BS).UK)
MWA1-44LM (MITSUBISHI) (for PUHZ-W85VHA2R1/R3/R4/R5(-BS).UK)
REV/V Reversing (4-way) valve (21S4) Change the refrigerant circuit (Heating/Cooling) and for Defrosting
S/V Solenoid valve For production test use
CHECK/V Check valve High pressure/Low pressure/For production test use
P-Sensor Pressure sensor (63HS) For calculation of the condensing temperature from high pressure
P/B Power board Inverter power board
LEV-A Linear expansion valve -A Heating: Secondary LEV Cooling: Primary LEV
LEV-B Linear expansion valve -B Heating: Primary LEV Cooling: Secondary LEV
TH32 Inlet water temperature thermistor For freeze protection and for compressor frequency control
TH3 Liquid temperature thermistor Heating: Evaporating temperature Cooling: Sub cool liquid temperature
TH4 Discharge temperature thermistor For LEV control and for compressor protection
TH6
Plate HEX liquid temperature thermistor Heating: Sub cool liquid temperature Cooling: Evaporating temperature
TH7 Ambient temperature thermistor For fan control and for compressor frequency control
TH8 Heat sink temperature thermistor For power board protection
TH33 Comp.surface temperature thermistor For compressor protection
Receiver Receiver For accumulation of refrigerant
PUHZ-W85VHA2.UK PUHZ-W85VHA2R1.UK PUHZ-W85VHA2R3.UK
PUHZ-W85VHA2-BS.UK PUHZ-W85VHA2R1-BS.UK PUHZ-W85VHA2R3-BS.UK
PUHZ-W85VHA2R4.UK PUHZ-W85VHA2R5.UK
PUHZ-W85VHA2R4-BS.UK PUHZ-W85VHA2R5-BS.UK
OCH465D

18
TROUBLESHOOTING9
Unit conditions at service Check code Actions to be taken for service (summary)
The trouble is reoccurring.
Displayed
Not displayed
Judge what is wrong and take a corrective action according
to “9-3. SELF-DIAGNOSIS ACTION TABLE”.
Conduct troubleshooting and ascertain the cause of the
trouble.
The trouble is not reoccurring.
Logged
Not logged
1Consider the temporary defects such as the work of
protection devices in the refrigerant circuit including
compressor, poor connection of wiring, noise, etc.
Re-check the symptom, and check the installation
environment, refrigerant amount, weather when the
trouble occurred, matters related to wiring, etc.
2Reset check code logs and restart the unit after finishing
service.
3There is no abnormality in electrical component,
controller board, etc.
1Re-check the abnormal symptom.
2Conduct troubleshooting and ascertain the cause of the
trouble
.
3Continue to operate unit for the time being if the cause
is not ascertained.
4There is no abnormality concerning of parts such as
electrical component, controller board, etc.
<Check code displayed by self-diagnosis and actions to be taken for service (summary)>
Present and past check codes are logged, and they can be displayed on the control board of outdoor unit. Actions to be taken
for service, which depends on whether or not the trouble is reoccurring in the field, are summarized in the table below. Check
the contents below before investigating details.
9-1. TROUBLESHOOTING
9-2. CHECK POINT UNDER TEST RUN
Before test run
• After installation of outdoor units, piping work and electric wiring work, re-check that there is no water leakage, loosened con-
nections and incorrect polarity.
• Measure impedance between the ground and the power supply terminal block (L, N) on the outdoor unit by 500 V Megger
and check that it is 1.0 M or over.
• Turn on power supply 12 hours before test run in order to protect compressor.
• Make sure to read operation manual before test run. (Especially items to secure safety.)
OCH465D

19
9-3. SELF-DIAGNOSIS ACTION TABLE
<Abnormalities detected when the power is turned on>
Check code
Abnormal point and detection method
Case Judgment and action
None —
1
No voltage is supplied to terminal
block (TB1) of outdoor unit.
a) Power supply breaker is
turned off.
b) Contact failure or
disconnection of power
supply terminal
c) Open phase (L or N phase)
2Electric power is not charged
to power supply terminal of
outdoor power circuit board.
a) Contact failure of power
supply terminal
b) Open phase on the outdoor
power circuit board
Disconnection of connector
TABT or TABS
3Electric power is not supplied
to outdoor controller circuit
board.
a) Disconnection of connector
(CNDC)
4Disconnection of reactor (DCL)
5Disconnection of outdoor noise
filter circuit board or parts
failure in outdoor noise filter
circuit board
6Defective outdoor power circuit
board
7Defective outdoor controller
circuit board
1Check following items.
a) Power supply breaker
b) Connection of power supply terminal block
(TB1)
c) Connection of power supply terminal block
(TB1)
2Check following items.
a) Connection of power supply terminal block
(TB1)
b) Connection of terminal on outdoor power
circuit board
Check connection of the connector TABT or TABS.
Refer to "9-6. TEST POINT DIAGRAM".
3Check connection of the connector (CNDC)
on the outdoor controller circuit board.
Check connection of the connector CNDC on
the outdoor power circuit board.
Refer to "9-6. TEST POINT DIAGRAM".
4Check connection of reactor. (DCL)
Check connection of “L1” and “L2” on the
active filter module. (ACTM)
Refer to "9-6. TEST POINT DIAGRAM".
5a) Check connection of outdoor noise filter
circuit board. Refer to "9-6. TEST POINT
DIAGRAM".
b) Replace outdoor noise filter circuit board.
Refer to "9-6. TEST POINT DIAGRAM".
6Replace outdoor power circuit board.
7Replace controller board (When items
above are checked but the units cannot be
repaired.)
F5
63H connector open
Abnormal if 63H connector circuit is open
for 3 minutes continuously from being
switched on.
63H: High-pressure switch
1Disconnection or contact failure
of 63H connector on outdoor
controller circuit board
2Disconnection or contact failure
of 63H
363H is working due to defective
parts.
4Defective outdoor controller
circuit board
1Check connection of 63H connector on
outdoor controller circuit board.
Refer to "9-6. TEST POINT DIAGRAM".
2Check the 63H side of connecting wire.
3Check for continuity of 63H.
Replace high pressure switch if it is defective.
4Replace outdoor controller circuit board.
OCH465D

20
Check code
Abnormal point and detection method Judgment and action
Case
Eb
Miswiring of Interface unit/Flow temp.
controller-outdoor unit connecting wire
(converse wiring or disconnection)
Outdoor controller circuit board can
automatically set the unit number of
Interface unit/Flow temp. controller.
Abnormal if the Interface unit/Flow
temp. controller number cannot be
set within 4 minutes after power on
because of miswiring (converse wiring or
disconnection) of Interface unit/Flow temp.
controller-outdoor unit connecting wire.
EC
Startup time over
The unit cannot finish startup process
within 4 minutes after power on.
Contact failure of Interface unit
/Flow temp. controller-outdoor
unit connecting wire
Diameter or length of Interface
unit/Flow temp. controller-
outdoor unit connecting wire is
out of specified capacity.
Noise has entered into power
supply or Interface unit/Flow
temp. controller-outdoor unit
connecting wire.
Contact failure or miswiring of
Interface unit/Flow temp. controller-
outdoor unit connecting wire
Diameter or length of Interface
unit/Flow temp. controller-
outdoor unit connecting wire is
out of specified capacity.
Defective transmitting receiving
circuit of outdoor controller
circuit board
Defective transmitting receiving
circuit of Interface/Flow temp.
controller board
Noise has entered into power
supply or Interface unit/Flow
temp. controller-outdoor unit
connecting wire.
Miswiring of Interface unit/Flow temp.
controller-outdoor unit connecting wire
1. Outdoor controller circuit board can
automatically check the number of
connected Interface unit/Flow temp.
controller. Abnormal if the number
cannot be checked automatically due to
miswiring of Interface unit/Flow temp.
controller-outdoor unit connecting wire
and etc. after power is turned on for 4
minutes.
2. Abnormal if outdoor controller circuit
board recognizes excessive number of
Interface unit/Flow temp. controller.
Check disconnection or looseness or polarity
of Interface unit/Flow temp. controller-outdoor
unit connecting wire of Interface unit/Flow
temp. controller and outdoor units.
Check diameter and length of Interface unit/
Flow temp. controller-outdoor unit connecting
wire.
Total wiring length: 80 m
(Including wiring connecting each Interface
unit/Flow temp. controller unit and between
Interface unit/Flow temp. controller and
outdoor unit)
Also check if the connection order of flat
cable is S1, S2, S3.
Check the number of Interface unit/Flow
temp. controller that is connected to 1
outdoor unit. (If EA is detected.)
–Turn the power off once, and on again to
check.
Replace outdoor controller circuit board
or Interface/Flow temp. controller board if
abnormality occurs again.
Check transmission path, and remove the
cause.
Note: The descriptions above –, are for EA,
Eb and EC.
Contact failure or miswiring
of Interface unit/Flow temp.
controller-outdoor unit
connecting wire
Diameter or length of Interface
unit/Flow temp. controller-
outdoor unit connecting wire is
out of specified capacity.
Excessive number of Interface
unit/Flow temp. controller is
connected to 1 outdoor unit.
(2 units or more)
Defective transmitting receiving
circuit of outdoor controller
circuit board
Defective transmitting receiving
circuit of Interface/Flow temp.
controller board
Noise has entered into power
supply or Interface/Flow
temp. controller-outdoor unit
connecting wire.
EA
OCH465D