Mitsubishi Electric Mr.SLIM PKA-RP35GAL Service Manual page 26

10-6. HOW TO CHECK THE PARTS
PKH-P35GALH PKA-RP35GAL PKA-RP35GAL#1
PKH-P50GALH PKA-RP50GAL PKA-RP50GAL#1
Parts name
Room temperature Disconnect the connector then measure the resistance with 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 with a tester.
(Winding temperature 20 )
Relay connector
3
Red 1
White
2
2
1
Black
3
Protector
OFF:125±5°C
ON :79±15°C
Measure the resistance between the terminals with a tester.
Vane motor
(Surrounding temperature 20 ~30 )
Orange
M
Red
Pink
Yellow Brown Blue
Measure the resistance of each heater element by with a tester.
Heater
(Only PKH)
Contactor
Measure the resistance between the terminals with a tester.
(for heater)
(Only PKH)
<Thermistor Characteristic graph>
Thermistor for
lower temperature
Thermistor R =15k" ± 3%
0
Fixed number of B=3480 ± 2%
Rt=15exp { 3480(
273+t
0: 15k"
10: 9.6k"
20: 6.3k"
25: 5.4k"
30: 4.3k"
40: 3.0k"
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 ( )