Mitsubishi Electric MSH-A18ND-S1 Service Manual page 13

8-4. Trouble criterion of main parts
MSH-A18ND
MSH-A24ND
Part name
Room temperature Measure the resistance with a tester.
(Part temperature 10˚C ~ 30˚C)
thermistor (RT11)
Indoor coil thermistor
(RT12(main), RT13(sub))
Indoor fan motor(MF)
MSH-A18ND
INNER FUSE
145: CUT OFF
MSH-A24ND
INNER
PROTECTOR
135i 5: OPEN
Measure the resistance between the terminal with a tester.
Horizontal vane
(Part temperature 10°C ~ 30°C)
motor(MV1)
Vertical vane
motor(MV2)
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Check method and criterion
Normal
8 k" ~ 20 k"
Measure the resistance between the terminals with a tester.
(Part temperature 10˚C ~ 30˚C)
Color of
lead wire MSH-A18ND
WHT – BLK 198 " ~ 214 "
BLK – RED 209 " ~ 227 "
Measure the voltage power ON.
Color of lead wire
BRN – YLW
(When fan revolved one time)
YLW – GRY
0V 5V 0V
Normal
282" ~ 306 "
Normal
MSH-A24ND
132 " ~ 144 "
152 " ~ 166 "
Normal
4.5 ~ 5.5V
(Approx.)
13
Figure
MSH-A18ND
MAIN
AUX
FUSE
MSH-A24ND
MAIN
AUX.
P
RED
ROTOR
YLW
BRN
ORN GRN
:INNER PROTECTOR
P