Mitsubishi Electric PUHZ-W50VHA Service Manual page 62

9-4. HOW TO CHECK THE PARTS
PUHZ-W50VHA(-BS) PUHZ-W85VHA(-BS)
PUHZ-W50VHAR1(-BS) PUHZ-W85VHAR1(-BS) PUHZ-HW112YHA2(-BS)
PUHZ-W50VHAR2(-BS)
PUHZ-W50VHAR3(-BS)
Parts name
TH3: Liquid pipe temp.
TH4: Discharge temp.
TH6: Plate Hex liquid pipe temp.
TH7: Ambient temp.
TH8: Heat sink temp.
TH32: Inlet water temp.
TH33: Comp. surface thermistor
(W50VHA(R1–R3), W85VHAR1)
Suction pipe temp. (HW112,140)
TH34: Comp. surface thermistor
(HW HA2R3–R7)
•
Fan motor (MF1)
Solenoid valve coil
<4-way valve>
(21S4)
Compressor
(MC)
U
V
W
Linear expansion valve
(LEV-A) (LEV-B) (LEV-C)
<except HW•HA2R3–R7 models> <HW•HA2R3–R7 models>
Gray
M
1
M
2
Orange
3
Red
4
Yellow
5
Black
6
Solenoid valve coil
<Bypass valve>
(SV) W50VHA
W85VHA
OCH439M
PUHZ-HW112YHA(-BS)
PUHZ-HW112YHA2R1(-BS)
PUHZ-HW112YHA2R3(-BS)
PUHZ-HW112YHA2R4(-BS)
PUHZ-HW112YHA2R5(-BS)
PUHZ-HW112YHA2R6(-BS)
PUHZ-HW112YHA2R7(-BS)
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature of 10 to 30°C)
TH4
TH33 (W50VHA(R1,R2,R3), W85VHAR1)
TH34 (HW HA2R3–R7)
•
TH3
TH6
TH7
TH33 (HW112,140)
TH32
TH8
Refer to the next page.
Measure the resistance between the terminals with a tester.
(At the ambient temperature of 20°C)
Normal
W50,85
2350 ± 170 Ω
Measure the resistance between the terminals with a tester.
(Winding temperature 20°C)
W50
0.865 to 0.895 Ω
0.640 Ω
Disconnect the connector then measure the resistance with a tester.
(Winding temperature 20°C)
Gray
Gray - Black
1
Orange
2
Red
3
Yellow 4
Black 5
Measure the resistance between the terminals with a tester.
(At the ambient temperature of 20°C)
Normal
1450 ± 150 Ω
PUHZ-HW140VHA(-BS)
PUHZ-HW140VHA2(-BS)
PUHZ-HW140YHA2R1(-BS)
PUHZ-HW140VHA2R2-BS
PUHZ-HW140VHA2R3(-BS)
PUHZ-HW140VHA2R4(-BS)
PUHZ-HW140VHA2R5(-BS)
PUHZ-HW140VHA2R6(-BS)
PUHZ-HW140VHA2R7(-BS)
Checkpoints
Normal
160 to 410 kΩ
4.3 to 9.6 kΩ
4.4 to 9.8 kΩ
39 to 105 kΩ
HW112,140
1435 ± 150 Ω
Normal
W85 HW140V(2)
0.188 Ω
Normal
Gray - Yellow Gray - Orange
Gray - Red
46 ± 3 Ω
62
PUHZ-HW140YHA(-BS)
PUHZ-HW140YHA2(-BS)
PUHZ-HW140YHA2R1(-BS)
PUHZ-HW140YHA2R3(-BS)
PUHZ-HW140YHA2R4(-BS)
PUHZ-HW140YHA2R5(-BS)
PUHZ-HW140YHA2R6(-BS)
PUHZ-HW140YHA2R7(-BS)
Abnormal
Open or short
Abnormal
Open or short
Abnormal
HW112,140Y(2)
Open or short
0.302 Ω
Abnormal
Open or short
Abnormal
Open or short