Mitsubishi Electric MS-A18WV Service Manual page 22

2. Trouble criterion of main parts
MS-A18WV -
E1
MS-A24WV -
E1
MS-A30WV -
E1
Part name
Room temperature
thermistor(RT11)
Indoor coil thermistor
(RT12(main), RT13(sub))
Indoor fan motor(MF)
MS-A18/A24WV
INNER FUSE
145: CUT OFF
MS-A30WV
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)
Normal
8 k" ~ 20 k"
Measure the resistance between the terminals with a tester.
(Part temperature 10˚C ~ 30˚C)
Color of
lead wire MS-A18/A24WV
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 "
Abnormal
Open or short-circuit
Normal
MS-A30WV
133 " ~ 144 "
152 " ~ 165 "
Normal
4.5 ~ 5.5V
0V 5V 0V
(Approx.)
Abnormal
Open or short-circuit
22
MS-A18/A24WV
Abnormal
FUSE
Open or
short-circuit
MS-A30WV
Abnormal
Remain 0V or 5V
RED
YLW
BRN
Figure
MAIN
AUX
MAIN
AUX.
P
ROTOR
ORN GRN
P :INNER PROTECTOR