Mitsubishi Electric MSH-GA50VB Service Manual page 14

9-4. Trouble criterion of main parts
MSH-GA50VB
MSH-GA60VB
MSH-GA80VB
Part name
Room temperature
thermistor(RT11)
Indoor coil thermistor
(RT12(main), RT13(sub))
Indoor fan motor(MF)
MSH-GA50/GA60VB
INNER FUSE
145: CUT OFF
MSH-GA80VB
INNER
PROTECTOR
135i 5: OPEN
Horizontal vane
motor(MV1)
Vertical vane
motor(MV2)
Check method and criterion
Measure the resistance with a tester.
(Part temperature 10˚C ~ 30˚C)
Refer to 9-6."Test point diagram and voltage",
"Indoor electronic control P.C. board", the chart of thermistor.
Measure the resistance between the terminals with a tester.
(Part temperature 10˚C ~ 30˚C)
Color of
lead wire MSH-GA50/GA60VB
WHT – BLK 282 " ~ 305 "
BLK – RED 141 " ~ 152 "
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)
Normal
282" ~ 306 "
Normal
MSH-GA80VB
132 " ~ 144 "
152 " ~ 166 "
Normal
4.5 ~ 5.5V
0V 5V 0V
(Approx.)
14
Figure
MSH-GA50/GA60VB
MAIN
AUX
FUSE
MSH-GA80VB
MAIN
AUX.
P
RED
ROTOR
YLW
BRN
ORN GRN
P :INNER PROTECTOR