13- 13 -
HWE10170 GB
[8] Troubleshooting
1. Check methods
1. Component and check points
(1) Thermistor
Room temperature thermistor (TH21)
Liquid pipe thermistor (TH22)
Gas pipe thermistor (TH23)
Disconnect the connector and measure the resistance between terminals with a tester.
(Ambient temperature 50°F (10°C) - 86°F (30°C))
1) Thermistor characteristic graph
(2) Fan motor
Refer to the page on "DC fan motor (fan motor/INV board)."(page 47)
(3) Linear expansion valve
Refer to the page on "LEV". ([8] 4)(page 51)
Normal Abnormal
4.3kΩ - 9.6kΩ Open or short
(Refer to the thermistor characteristic graph below.)
Low-temperature thermistor
Room temperature thermistor (TH21)
Liquid pipe thermistor (TH22)
Gas pipe thermistor (TH23)
Thermistor R
0
= 15 kΩ 3%
Multiplier of B = 3480 kΩ 2%
32°F (0°C) 15kΩ
50°F (10°C) 9.6kΩ
68°F (20°C) 6.3kΩ
77°F (25°C) 5.2kΩ
86°F (30°C) 4.3kΩ
104°F (40°C) 3.0kΩ
(A) Temperature °F (°C)
(B) Resistance (kΩ)
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)
body.fm 13 ページ ２０１１年７月２６日 火曜日 午後２時２６分
To Next Page
Loading...
Need help?
General
