Mitsubishi Electric MSH-GE50VB-E1 Service Manual page 25

10-4. TROUBLE CRITERION OF MAIN PARTS
MSC-GE20VB MS-GE50VB
MSC-GE25VB MSH-GE50VB
MSC-GE35VB
Part name
Room temperature
thermistor (RT11)
Indoor coil thermistor
(RT12)
Indoor fan motor (MF)
MSC-GE20/25/35VB
INNER FUSE
145°C CUT OFF
MS-GE50VB
MSH-GE50VB
INNER FUSE
140°C CUT OFF
Vane motor (MV)
Horizontal vane
motor (MV1)
Vertical vane
motor (MV2)
OBH529A
Check method and criterion
Measure the resistance with a tester.
(Part temperature 10°C ~ 30°C)
Refer to 10-6. "Test point diagram and voltage",
"Indoor electronic control P.C. board", for the chart of thermistor.
Measure the resistance between the terminals with a tester.
(Part temperature 10°C ~ 30°C)
Color of
MSC-GE20/25VB
lead wire
271 Ω ~ 295 Ω
WHT – BLK
BLK – RED 180 Ω ~ 196 Ω
Measure the voltage power ON.
Color of lead wire
BRN – YLW
(When fan revolved one time)
YLW – GRY
Measure the resistance between the terminal with a tester.
(Part temperature 10°C ~ 30°C)
MSC-GE20/25/35VB
240 Ω ~ 260 Ω
Normal
MSC-GE35VB
215 Ω ~ 233 Ω
305 Ω ~ 331 Ω
Normal
4.5 ~ 5.5V
0V 5V 0V
(Approx.)
Normal
MS-GE50VB
MSH-GE50VB
283 Ω ~ 306 Ω
25
Figure
MSC-GE20/25/35VB
MS-GE50VB
FUSE
MSH-GE50VB
284 Ω ~ 307 Ω
142 Ω ~ 154 Ω
MS-GE50VB
MSH-GE50VB
MAIN
AUX
FUSE
RED
YLW
BRN
WHT
RED
BLK
YLW
GRY
BRN
ROTOR
ORN GRN