38
C Check of indoor P.C. board and indoor fan motor
Turn OFF the power supply.
Remove the indoor fan motor connector
CN211 and the vane motor connector
CN151 from the indoor electronic control
P.C. board and turn ON the power supply.
Does the unit operate with the remote
controller?
Does OPERATION INDICATOR lamp light
up by pressing EMERGENCY OPERATION
switch?
Yes
No
Measure the resistance of indoor fan
motor.
Refer to 10-5.
Short circuit:
Replace the indoor fan motor.
Turn OFF the power supply.
Check both “parts side” and “pattern
side” of the indoor electronic control
P.C. board visually.
Replace the varistor (NR11)
and fuse (F11). 3
Are the varistor (NR11)
burnt and the fuse (F11)
blown?
No
No
Yes
Yes
Be sure to check both the fuse
and the varistor in any case.
Is the fuse (F11) blown
only?
Measure the resistance between
CN211 (+) and (-) of indoor fan
motor connector. 1, 2
Yes
Is the resistance 1MΩ or more?
Replace the fuse (F11) and the
indoor fan motor. 3
No
Replace the fuse (F11). 3
Measure the resistance of resistor (R111)
[
MSZ-AP25/35/42VG, AP25/35/42VGK
]
/
reactor (L112)
[
MSZ-AP50VG,
AP50VGK
] on the indoor electronic
control P.C. board.
No
Replace the indoor electronic
control P.C. board and the indoor
fan motor.
Replace the indoor electronic control P.C. board.
Measure the resistance of the vane
motor coil.
Refer to 10-5.
Short circuit:
Replace the vane motor and the indoor
electronic control P.C. board.
1. The fan motor connector's lead wire is red,
whereas is black.
2. Connect "+" of the tester to fan motor connector's
lead wire, and “-” to lead wire, otherwise the
resistance cannot be measured properly.
3. Please replace the fuse after removing the indoor
power P.C. board from the electrical box.
Is the resistance of resistor (R111)
[
MSZ-AP25/35/42VG, AP25/35/42VGK
]
approximately 3.9Ω
/
reactor (L112)
[
MSZ-AP50VG, AP50VGK
]
approximately 4.3Ω?
Yes
Terminal
P.C. board
Varistor
(NR11)
LD201(T)
Fuse (F11)
Indoor electronic
control P.C. board
GND
R111
L112
LD201(M)
MSZ-AP25/35/42/50VG
MSZ-AP25/35/42/50VGK
OBH788C
Содержание WSH-AP42WI
Страница 13: ...13 MSZ AP50VG E1 EN1 ER1 E2 EN2 MSZ AP50VG ET1 ET2 OBH788C ...
Страница 14: ...14 MSZ AP60VG E1 ER1 E2 MSZ AP71VG E1 ER1 E2 MSZ AP60VG ET1 ET2 MSZ AP71VG ET1 ET2 OBH788C ...
Страница 16: ...16 MSZ AP50VGK E1 EN1 ER1 E2 EN2 MSZ AP50VGK ET1 ET2 OBH788C ...
Страница 17: ...17 MSZ AP60VGK E1 ER1 E2 MSZ AP71VGK E1 ER1 E2 MSZ AP60VGK ET1 ET2 MSZ AP71VGK ET1 ET2 OBH788C ...