Mitsubishi Electric Mr.SLIM PLA Series Service Manual page 29

9-6. HOW TO CHECK THE PARTS
PLA-ZRP100BA
Parts name
Room temperature Disconnect the connector then measure the resistance with a tester.
thermistor (TH1) (At the ambient temperature of 10 ~30 )
Pipe temperature
thermistor/liquid(TH2)
Condenser/Evaporator
temperature thermistor
(TH5)
Vane motor (MV)
Measure the resistance between the terminals with a tester.
(At the ambient temperature of 20 ~30 )
White
MV
Orange
Red
Yellow
Blue
Drain pump (DP)
Measure the resistance between the terminals with a tester.
(Winding temperature 20 )
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
4 3 2 1
Blue Black Pink Brown
Measure the resistance between the terminals with a tester.
Vane motor for
(At the ambient temperature of 20 ~30 )
i-see sensor (Option)
White
MV
Orange
Red
Yellow
Blue
OCH529
Normal
4.3k ~9.6k Open or short
Connector
Red - Yellow ( - , - ,
Red - Blue ( - , - ,
Red - Orange ( - , - ,
Red - White ( - , - ,
Normal
290 Open or short
Normal
UP Short
DOWN Open
Black plastic tape
i-see sensor (At the ambient temperature of 10 ~40 )
i-see sensor connector
(–)— (+)
(+)— (–)
NOTE : Be careful not to discharge static electricity into electronics.
Connector
Red - Yellow
Red - Blue
Red - Orange
Red - White
Check points
Abnormal
(Refer to the thermistor.)
- , - )
- , - )
- , - )
- , - )
Abnormal
Abnormal
Other than short
Other than open
Normal
DC 1.857V ~ 3.132V
DC 0.939V ~ 1.506V
Abnormal
Normal
Open or short
250
29
Abnormal
Normal
Open or short
300
Switch
Magnet
Moving part
Do not disassemble corner panel
with i-see sensor.
Abnormal
Other than the normal
Other than the normal