Service manual

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