Mitsubishi Electric PEAD-RP35EA Service Manual page 30

10-5. HOW TO CHECK THE PARTS
Parts name
Room temperature Disconnect the connector then measure the resistance using a tester.
thermistor (TH1) (Surrounding temperature 10:~30:)
Pipe temperature
thermistor (TH2)
Condenser/Evaporator
temperature thermistor
(TH5)
<Thermistor Characteristic graph>
Thermistor for
lower temperature
Thermistor R =15k" ± 3%
0
Fixed number of B=3480k" ± 2%
Rt=15exp { 3480(
273+t
0: 15k"
10: 9.6k"
20: 6.3k"
25: 5.2k"
30: 4.3k"
40: 3.0k"
30
Normal
4.3k"~9.6k" Open or short
Room temperature thermistor(TH1)
Pipe temperature thermistor(TH2)
Condenser/evaporator temperature
thermistor(TH5)
1
1
) }
273
Check points
Abnormal
(Refer to the thermistor)
< Thermistor for lower temperature >
50
40
30
20
10
0
-20 -10 0 10 20 30 40 50
Temperature (:)