Mitsubishi Electric Mr. Slim PLA-A12BA4 Service Manual page 25

9-6. HOW TO CHECK THE PARTS
PLA-A12BA4
PLA-A30BA4
Parts name
Room temperature Disconnect the connector then measure the resistance with a tester.
thermistor (TH1) (At the ambient temperature of 10˚C[50˚F]~30˚C[86˚F])
Pipe temperature
thermistor/liquid(TH2)
Condenser/Evaporator
temperature thermistor
(TH5)
Measure the resistance between the terminals with a tester.
Vane motor (MV)
(At the ambient temperature of 20˚C[68˚F]~30˚C[86˚F])
White
Orange
Red
Yellow
Blue
Measure the resistance between the terminals with a tester.
Drain pump (DP)
(Winding temperature 20˚C[68˚F])
YLW
1
3
YLW
Drain float switch (FS)
Measure the resistance between the terminals with a tester.
Moving part
State of moving part
1
2
3
4
i-see sensor
Turn on the indoor unit with the black plastic tape on the outside of
(Option)
i-see sensor controller board.
With electricity being turned on, measure the power voltage between connectors with tester.
i-see sensor rotates and pull out the connector of motor for i-see sensor.
4 3 2 1
i-see sensor (At the ambient temperature of 10˚C[50˚F]~40˚C[104˚F])
4 3 2 1
Blue Black Pink Brown
NOTE : Be careful of handing such a static electricity.
Measure the resistance between the terminals with a tester.
Vane motor for
(At the ambient temperature of 20˚C[68˚F]~30˚C[86˚F])
i-see sensor (Option)
White
Orange
Red
Yellow
Blue
PLA-A18BA4
PLA-A36BA4
Normal Abnormal
4.3k ~9.6k Open or short
Connector
Red - Yellow ( - , - ,
Red - Blue ( - , - ,
Red - Orange ( - , - ,
Red - White ( - , - ,
Normal Abnormal
290 Open or short
Normal
UP Short
DOWN Open
Black plastic tape
i-see sensor connector
(–)— (+)
(+)— (–)
Connector Normal
Red - Yellow
Red - Blue
250
Red - Orange
Red - White
PLA-A24BA4
PLA-A42BA4
Check points
(Refer to the Thermistor Characteristic graph.)
Normal
- , - )
- , - )
300
- , - )
- , - )
Abnormal
Other than short
Other than open
Do not disassemble corner panel
with i-see sensor.
Normal
DC 1.857V~ 3.132V
DC 0.939V~ 1.506V
Abnormal
Open or short
25
Abnormal
Open or short
Switch
Magnet
Moving part
Abnormal
Other than the normal
Other than the normal