8 Troubleshooting
233
SMGB0087 rev.0 - 12/2013
8
RAS-(8-12)HN(P/C)(E)
No
In case fuse melted,
replace fuse.
Check the cause of
melting
Remove the connector CN6 on
PCB1. Power source ON
Yes
Yes
No
Is fuse (EF1 or EF2)
of outdoor unit normal?
Yes
Is LED2 (green) on
OU PCB1 ashing?
Reconnect the connector CN6 on
OU PCB1
Normal IPM.
Check the electrical wiring again.
Power source OFF
Faulty OU PCB1
No (LED2 ON or OFF)
No (LED2 remains ON or OFF)
Is LED2 (green) on
OU PCB1 ashing?
Yes
Does ashing speed
become faster than before?
Remove the connectors
PCN201/202 and CN201/202 on
inverter PCB
Power source ON
Is LED2 (green) on
OU PCB1 ashing?
Yes
Does ashing speed
become faster than before?
Yes
Normal Inverter PCB.
Faulty fan motor.
No (LED2 ON or OFF)
Faulty inverter PCB
Incorrect wiring
No
Is DC fan motor
normal?
Check it by troubleshooting at
item Checking method of DC fan
motor for outdoor unit
No
Faulty DC fan motor
Faulty inverter PCB
*1)
Faulty Inverter PCB
Incorrect wiring
Normal
Yes
N O T E
Surely perform the troubleshooting of DC fan motor according to section “8.4 Checking procedure for main parts”. If the DC
fan motor fails, the normal inverter PCB may be damaged.
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