Mitsubishi Electric MSZ-G09SV-E1 Service Manual page 49

3. Trouble shooting procedure of main parts
(Simple check method of main parts)
MSZ-G09SV -
E1
MSZ-G09SV -
E2
Part name Checking method and criterion
Room tempera-
Disconnect the connector and measure the resistance with a tester.
ture thermistor
(Part temperature : 10:~30:)
(RT11)
Indoor coil ther-
mistor
(RT12, RT13)
Defrost Disconnect the connector and measure the resistance with a tester.
thermistor
(Part temperature : -10:~40:)
(RT61)
Disconnect the connector and measure the resistance with a tester.
Discharge
Before measurement, hold the thermistor with your hands to warm it up.
temperature
(Part temperature : 0:~40:)
thermistor
(RT62)
Disconnect the connector and measure the resistance with a tester.
Fin temperature
(Part temperature : 0:~40:)
thermistor
(RT64)
Disconnect the connector and measure the resistance between the terminals with a tester.
Compressor
(Part temperature : -10:~40:)
(MC)
WHT
RED BLK
2 3
1
W
V
U
Compressor motor
Indoor fan
motor (MF)
MAIN
AUX.
FUSE
MSZ-G12SV - MUZ-G09SV -
E1
MSZ-G12SV - MUZ-G09SV -
E2
Normal
8k"~20K"
Normal
5k"~55K"
Normal
150k"~600K"
Normal
30k"~180K"
U-V
MUZ-G09SV
U-W
MUZ-G12SV
V-W
Measure the resistance between the terminals with a tester.
(Part temperature : 10:~30:)
Color of lead wire
WHT-BLK
BLK-RED
Measure the voltage Power ON.
BRN-YLW
(When fan revolved one time)
YLW-GRY
MUZ-G12SV -
E1
MUZ-G12SV -
E2
Abnormal
Open or short circuit
Abnormal
Open or short circuit
Abnormal
Open or short circuit
Abnormal
Open or short circuit
Normal
1.88"~2.31"
0.39"~0.49"
Normal
280"~304"
312"~338"
Normal
4.5 ~ 5.5V
Remain 0V or 5V
0V 5V 0V
(Approx.)
49
E1
E2
Abnormal
Open or short
circuit
Abnormal
Open or short
circuit.
Abnormal