Mitsubishi PKA-RP35GAL Service Manual page 26

9-6. HOW TO CHECK THE PARTS
PKH-P35GALH, PKH-P50GALH
PKA-RP35GAL, PKA-RP50GAL
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)
Fan motor Measure the resistance between the terminals using a tester.
(Winding temperature 20:)
Relay connector
3
Red 1
White
2
2
1
Black
3
Protector
OFF:125i5:
ON :79i15:
Measure the resistance between the terminals using a tester.
Vane motor
4 (Surrounding temperature 20:~30:)
Orange
5 M
Red
2
Pink
Yellow Brown Blue
3 6 1
Measure the resistance of each heater element by using a tester.
Heater
(Only PKH)
Contactor Measure the resistance between the terminals using a tester.
(for heater)
(Only PKH)
<Thermistor Characteristic graph>
Thermistor for
lower temperature
Thermistor R =15kΩ ± 3%
0
Fixed number of B=3480 ± 2%
Rt=15exp { 3480(
273+t
0: 15kΩ
10: 9.6kΩ
20: 6.3kΩ
25: 5.4kΩ
30: 4.3kΩ
40: 3.0kΩ
Normal
4.3k"~9.6k" Open or short
Motor terminal
or
Relay connector
Red–Black
White–Black
Connector
Brown–Yellow
Brown–Blue
Red–Orange
Red–Pink
Normal
72"
800W 240V
Normal
6 1
88H
160"
Room temperature thermistor(TH1)
Pipe temperature thermistor(TH2)
Condenser/evaporator temperature
thermistor(TH5)
1 1
) }
273
Check points
Abnormal
(Refer to <Thermistor Characteristic graph>
for a detail.)
Normal
120.5"
Open or short
111.3"
Normal
186~214"
Open or short
Abnormal
Open or short
Abnormal
Open or short
26
Abnormal
Abnormal
< Thermistor for lower temperature >
50
40
30
20
10
0
-20 -10 0 10 20 30 40 50
Temperature (:)