40
Check of indoor electronic control P.C. board
C
Check of outdoor unit
D
Compressor and / or outdoor fan motor doesn’t operate.(Only indoor fan operates.)
Start
Press the EMERGENCY OPERATION switch.
3-minute time delay works.
Test run operation operates for 30 minutes.
Check the voltage to the terminal block of outdoor
unit. Is there 230V AC to the terminal block between
- ?
Check the voltage to the terminal block of indoor unit.
Is there 230V AC to the terminal block between
- ?
Check the outdoor deicer P.C. board at first, then check
the outdoor fan motor and the compressor.
Check the continuity of indoor and outdoor unit connection.
2
N
2
N
No
No
Yes
Yes
Replace the indoor elec-
tronic control P.C. board.
Check the both “parts side” and “pattern
side” of indoor electronic control P.C.
board visually.
Replace the fuse.
Is fuse(F11) blown?
Be sure to check both fuse
and varistor in any case.
Replace the fan
motor.
Replace the indoor
electronic control
P.C. board.
Is winding
resistance of
fan motor 0
"
?
Is winding
resistance of
vane motor 0
"
?
No
Yes
Replace the vane
motor.
No
Yes
Yes
Is varistor(NR11) burnt?
Replace the varistor.
Yes
Turn OFF the power supply.
Remove indoor fan motor connector CN211 and
vane motor connector CN151 from the indoor electronic
control P.C. board and turn ON the power supply.
No
No
Does the unit operate with the remote controller?
Does the OPERATION INDICATOR lamp light up by
pressing the EMERGENCY OPERATION switch?
Yes
No
Measure the
resistance between
CN201
1
on the
indoor electronic
control P.C. board
and
N
on the terminal
block with the tester.
Is resistance approx. 0
"
?
Replace the fuse (F12).
CN201
1
2
N
F12
1
3
Terminal
block
Be sure to check both resistance.
No(
∞
)
Yes
Turn OFF the
power supply.
Turn OFF the
power supply.
The unit doesn’t operate with the remote controller. Also, the OPERATION INDICATOR lamp doesn’t light up by press-
ing the EMERGENCY OPERATION switch.
MSH-C18TV
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