The unit does not operate with the remote controller.
Also, OPERATION INDICATOR lamp does not light up by pressing EMERGENCY OPERATION switch.
C Check of indoor electronic control P.C. board and indoor fan motor
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.
Measure the resistance between |
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| Short/open circuit: | |
CN211 and of the indoor fan motor |
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| Replace the indoor fan motor. | |
connector. |
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Does the unit operate with the remote controller?
Does OPERATION INDICATOR lamp light up by pressing EMERGENCY OPERATION switch?
No
Turn OFF the power supply.
Yes
Measure the resistance of the horizon- tal vane motor coil.
Refer to
Replace the indoor elec- tronic control P.C. board.
Yes
Are the varistor(NR11) burnt and the fuse(F11)
blown?No
Short/open circuit:
Replace the horizontal vane motor and the indoor electronic control P.C. board.
Check both “parts side” and “pattern side” of the indoor electronic control P.C. board visually.
Be sure to check both the fuse and the varistor in any case.
Is the fuse(F11) blown
only?No
Yes
Measure the resistance between 
(+)and 
(-)
1, 
2
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 
lead wire, otherwise the resistance cannot be measured properly.
Is the resistance 1 MΩ |
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or more? | No | |
| Yes |
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Replace the indoor electronic control P.C. board
Replace the indoor electronic control P.C. board and the indoor fan motor.
Measure the resistance of cement 
resistor(R111) on the indoor elec-
tronic control P.C. board.
Is the resistance approx. |
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4 Ω? | No | |
| Yes |
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Replace the indoor electronic control P.C. board and the indoor fan motor.
Indoor electronic control P.C. board
Varistor(NR11)
Fuse(F11)
CN211
Replace the indoor electronic control P.C. board.
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