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7
TROUBLE SHOOTING
7-1. How to check the parts
Parts name
Room temparature
Disconnect the connector, then measure the resistance using a tester.
thermistor
(TH21)
(Surrounding temperature 10°C~30°C)
Liquid pipe thermistor
(TH22)
Gas pipe thermistor
(TH23)
Transformer
Disconnect the connector and measure the resistance using a tester.
CNT
T
CN3T
Red
Blue
1
1
2
2
3
3
Blue
White
Linear expansion
Disconnect the connector then measure the resistance valve using a tester.
Refer to the next page for a detail.
valve
CN60
White
1
Yellow
2
Orange
3
LEV
Blue
4
Red
5
Brown
6
Fan motor
PFFY-P20~50
Relay connector
VLEM-E/VLRM-E
Red
C
White
Protector
PFFY-P63
VLEM-E/VLRM-E
Relay connector
Red
C
White
Thermal fuse
Normal
4.3kΩ ~9.6kΩ
Open or short
Normal
CNT(1)-(3)
App.15Ω
CN3T(1)-(3)
App.4Ω
Normal
(1)-(5)
(2)-(6)
White-Red
Yellow-Blown
150Ω
Measure the resistance between the terminals using a tester.
Relay connector
Black
4
Blue
3
Yellow
2
1
White
1
Measure the resistance between the terminals using a tester.
Relay connector
Black
4
Blue
3
Yellow
2
1
White
1
Check points
Abnormal
Abnormal
Open or short
(3)-(5)
(4)-(6)
Orange-Red
Blue-Brown
±10%
Motor terminal
or
P20,P25
Black - White
335.0
Red - Yellow
174.0
Yellow - Blue
56.8
Blue - Black
99.6
Motor terminal
Normal
or
P63
Black - White
112.0
Red - Yellow
78.0
Yellow - Blue
12.7
Blue - Black
50.8
(Refer to the thermistor characteristic graph
on next page.)
Abnormal
Open or short
Normal
P32
P40
P50
294.0
114.0
101.4
150.0
80.0
60.3
52.0
30.0
15.1
78.0
42.0
29.4
Abnormal
Open or short
(at 20˚C)
Abnormal
Open or short
(at 20˚C)
12
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