Service manual

92
Measure the resistance between the terminals with a tester.
(Coil wiring temperature10°C ~ 30°C)
Room
temperature
thermistor (RT11)
12-4. Trouble criterion of main parts
Part name
Indoor coil
thermistor (RT12)
Indoor fan
motor (MF)
INNER FUSE
136i3°C
CUT OFF
Motor partSensor part
Check method and criterion
Measure the resistance with a tester.
(Part temperature 10°C ~ 30°C)
Measure the voltage Power ON.
Figure
8kΩ ~ 20kΩ
Normal
Abnormal
Open or
short-circuit
396 ~ 430ΩWHT-BLK
BLK-RED
BRN-YLW
YLW-GRY
Normal
4.5 ~ 5.5V
Abnormal
Remain 0V or 5V
(When fan revolved one time)
0V➔5V➔0V
(Approx.)
MSC-A07/A09WV
320 ~ 348Ω
RED
BLK
YLW
FUSE
GRY
BRN
WHT
MSC-A07WV -
MSC-A09WV -
MSC-A12WV -
E1
E1
E1
Normal
Abnormal
Open or
short-circuit
MSC-A07/A09/A12WV
MSC-A07/A09/A12WV
Vane motor
(MV)
Measure the resistance between the terminals with a tester.
(Part temperature10°C ~ 30°C)
Normal
Abnormal
Open or
short-circuit
240 ~ 260Ω
RED
YLW
BRN
ORN
GRN
ROTOR
MSC-A07/A09/A12WV
Color of
lead wire
303 ~ 329Ω
MSC-A12WV
287 ~ 311Ω
Color of
lead wire
OB307C-4.qxp 04.5.11 1:19 PM Page 92