Abnormal point and detection method
Error Code
Inlet water temperature
Abnormal if the following conditions are
detected for continuously 10 seconds.
1. Cooling mode
During compressor operation
TH32 < 3:
2. Heating mode (exclude defrosting)
During compressor operation
PE
TH32 < -10:
3. Defrosting mode
During compressor operation
TH32 < 0:
Thermistor
TH32: Inlet water temperature
8-4. HOW TO CHECK THE PARTS
PUHZ-W85VHA
Parts name
TH3: Liquid pipe
Disconnect the connector then measure the resistance with a tester.
temperature
(At the ambient temperature of 10 ~30 )
TH4: Discharge
temperature
TH6: Plate Hex liquid
pipe temperature
TH7: Ambient
temperature
TH8: Heatsink
temperature
TH32: Inlet water
temperature
Fan motor (MF1)
Refer to the next page.
Solenoid valve coil
Measure the resistance between the terminals with a tester.
(At the ambient temperature of 20 )
<Four-way valve>
(21S4)
Compressor
Measure the resistance between the terminals with a tester.
(Winding temperature 20 )
(MC)
U
V
W
Linear expansion valve
Disconnect the connector then measure the resistance with a tester.
(LEV-A) (LEV-B)
(Winding temperature 20°C)
Gray
M
1
2
Orange
3
Red
4
Yellow
5
Black
6
Solenoid valve coil
Measure the resistance between the terminals with a tester.
(At the ambient temperature of 20 )
<Bypass valve>
(SV)
1 Reduced water flow
· Clogged filter
· Leak of water
2 Low temperature
· Low-load
· Low temperature inlet water
3 Defective water pump
4 Leakage or shortage of
refrigerant
Normal
TH4
160k ~410k
TH3
TH6
4.3k ~9.6k
TH7
TH32
4.4k ~9.8k
TH8
39k ~105k
Normal
2350±170
Normal
0.865 ~0.895
Gray - Black
Gray - Red
Normal
1450±150
Case
12 Check water piping.
3 Check water pump.
4 Check intake superheat.
Check points
Abnormal
Open or short
Abnormal
Open or short
Abnormal
Open or short
Normal
Gray - Yellow
Gray - Orange
46±3Ω
Abnormal
Open or short
20
Judgment and action
Check leakage of refrigerant.
Abnormal
Open or short