23
GB
7.2. Check methods
1. Component and check points
(1) Thermistor
Gas pipe thermistor (TH23)
Disconnect the connector and measure the resistance between terminals with a tester.
(Ambient temperature 10°C - 30°C)
1) Thermistor characteristic graph
(2) Linear expansion valve
Disconnect the connector, and measure the resistance between terminals with a tester.
Refer to the next page for details.
Normal
Abnormal
4.3k
Ω
- 9.6k
Ω
Open or short
(Refer to the thermistor characteristic graph below.)
Low-temperature thermistor
Gas pipe thermistor (TH23)
Thermistor R
0
= 15 k
Ω
±3%
Multiplier of B = 3480 k
Ω
±2%
0°C 15k
Ω
10°C 9.6k
Ω
20°C 6.3k
Ω
25°C 5.2k
Ω
30°C 4.3k
Ω
40°C 3.0k
Ω
(A) Temperature (°C)
(B) Resistance
(k
Ω
)
Rt = 15 exp { 3480(
) }
1
273+t
1
273
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
(A)
(B)
Normal
Abnormal
1-5
2-6
3-5
4-6
Open or short
White-Red
Yellow-Brown
Orange-Red
Blue-Brown
200 k
Ω
±10%
(A)
Brown
(D)
Orange
(B)
Red
(E)
Yellow
(C)
Blue
(F)
White
1
2
3
4
5
6
LEV
M
(A)
(B)
(C)
(D)
(E)
(F)
CN60
02_WT06728X03-body.fm 23 ページ 2013年12月25日 水曜日 午後1時29分