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7
TROUBLESHOOTING
7-1. HOW TO CHECK THE PARTS
Parts name
Thermistor (TH-A–E)
<Gas pipe>
Linear expansion valve
( LEV-A–E )
OCH801
Disconnect the connector then measure the resistance with a multimeter.
(At the ambient temperature 50 to 86°F [10 to 30°C])
Thermistor R0=15kΩ ± 3%
Fixed number of B=3480 ± 2%
1
Rt=15exp { 3480 (
273+t
50F° [10°C] 9.7 kΩ
59F° [15°C] 7.9 kΩ
68F° [20°C] 6.4 kΩ
77F° [25°C] 5.3 kΩ
86F° [30°C] 4.4 kΩ
Disconnect the connector then measure the resistance with a multimeter.
(Winding temperature 68F° [20°C])
Red - White
Red - Orange
Checkpoint
< Thermistor for lower temperature >
12
1
) }
273
10
8
6
4
2
0
10
50
Normal
Red - Yellow
46 ± 4Ω
15
15
20
25
59
68
77
Temperature
Abnormal
Red - Blue
Open or short
30°C
86°F
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