Mitsubishi Electric MSH-C18TV Service Manual page 38

2. Trouble criterion of main parts
MSH-C18TV -
E1
MSH-C24TV -
E1
Part name
Room Measure the resistance with a tester.
temperature
(Part temperature 10°C ~ 30°C)
thermistor(RT11)
Indoor coil
thermistor(RT12)
Measure the resistance with a tester.
Defrost
(Part temperature –10°C ~ 40°C)
thermistor(RT61)
Ambient
temperature
thermistor(RT63)
Measure the resistance between the terminals with a tester.
(Coil wiring temperature –10°C ~ 40°C)
Compressor
(MC)
Measure the resistance between the terminals with a tester.
(Coil wiring temperature10°C ~ 30°C)
Indoor fan
motor
(MF)
Measure the voltage Power ON.
Measure the resistance between the terminals with a tester.
(Coil wiring temperature –10°C ~ 40°C)
Outdoor fan
motor
(MF)
Measure the resistance between the terminals with a tester.
(Part temperature10°C ~ 30°C)
Vane motor
(MV)
MUH-C18TV -
E1
MUH-C24TV -
E1
Check method and criterion
Normal
8kΩ ~ 20kΩ
Normal
5kΩ ~ 60kΩ
MSH-C18TV
0.93 ~ 1.15Ω
C-R
1.79 ~ 2.19Ω
C-S
WHT-BLK
BLK-RED
BRN-YLW
4.5 ~ 5.5V
(When fan revolved one time)
YLW-GRY
0V 5V 0V
MSH-C18TV
102 ~ 126Ω
WHT-BLK
BLK-RED 97 ~ 120Ω
BLK-YLW –
YLW-RED –
Normal
RED-other one
358 ~ 388Ω
Abnormal
Open or short-circuit
Abnormal
Open or short-circuit
Normal
MSH-C24TV
0.59 ~ 0.73Ω
1.78 ~ 2.18Ω
Normal
176 ~ 192Ω
240 ~ 261Ω
Normal Abnormal
Remain 0V or 5V
(Approx.)
Normal
MSH-C24TV
55 ~ 68Ω
–
26 ~ 33Ω
55 ~ 68Ω
Abnormal
Open or short-circuit
38
WHT
Abnormal
AUX.
S
Open or
short-circuit
RED
Abnormal
Open or
short-circuit
FUSE
MSH-C18TV
Abnormal
BLK
MSH-C24TV
Open or
short-circuit
AUX.1 AUX.2
BLK
PNK
ORN
RED
P :INNER PROTECTOR
Figure
C
P
~
MAIN
R
BLK
MAIN
AUX.
MAIN
AUX.
P
RED ORN WHT
MAIN
P
C
YLW RED ORN WHT
ROTOR
YLW BLU