Mitsubishi Electric PUHZ-W90VHA, Service Manual

Page: 19 / 45

19
8-4. HOW TO CHECK THE PARTS
PUHZ-W90VHA
1
2
3
4
5
6
M
Parts name Check points
Disconnect the connector then measure the resistance using a tester.
(At the ambient temperature of 10
~30 )
Disconnect the connector then measure the resistance using a tester.
(Winding temperature 20
)
TH3:Liquid pipe
temperature
TH4:Discharge
temperature
TH6:Plate Hex liquid
pipe temperature
TH7:Ambient
temperature
TH8:Heatsink
temperature
TH32:Inlet water
temperature
Normal
160k ~410k
4.3k ~9.6k
4.4k ~9.8k
39k ~105k
TH4
TH3
TH6
TH7
TH32
TH8
Abnormal
Open or short
Normal
Red - White Red - Orange
Brown - Yellow
Brown - Blue
Abnormal
46±4
Measure the resistance between the terminals using a tester.
(At the ambient temperature of 20
)
Solenoid valve coil
<Four-way valve>
(21S4)
Compressor
(MC)
Linear expansion valve
(LEV-A/ LEV-B)
Normal
Abnormal
Open or short
Open or short
Measure the resistance between the terminals using a tester.
(At the ambient temperature of 20
)
Normal
1450±150
Abnormal
Open or short
Solenoid valve coil
<Bypass valve>
(SV)
Refer to the next page. Fan motor(MF1)
2350±170
0.865 ~0.895
Measure the resistance between the terminals using a tester.
(Winding temperature 20
)
Normal Abnormal
Open or short
W
V
U
Red
Brown
Blue
Orange
Yellow
White