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.
C Check of indoor electronic control P.C. board
Check the both “parts side” and “pattern side” of indoor electronic control P.C. board visually.
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.
Does the unit operate with the remote controller?
No
Does the OPERATION INDICATOR lamp light up by pressing the EMERGENCY OPERATION switch?
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| vane motor 0 "? |
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Replace the fuse.
Yes
Is fuse(F11) blown? No
Is varistor(NR11) burnt? Yes
Replace the varistor.
Varistor (NR11)
Fuse (F11)
Indoor electronic control P.C. board
No | Replace the indoor |
| electronic control |
| P.C. board. |
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