SiAF332111E Troubleshooting by Error Code
Part 6 Service Diagnosis 303
RXMQ8AR
There are some
defects in the power
supply conditions
aforementioned.
The
insulation resistance
of the compressor is less
than 100 k.
NO
YES
YES
Remedy the defects.
Replace the compressor
(M1C).
Check for power supply
conditions.
(1) Power supply voltage falls
within the range of 380 to
415 V?
(2) Any open phase in the
power supply wiring or any
wrong wiring?
(3) Imbalance in the power
supply voltage is
maintained within 12 V?
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
The inverter
PCB has damage.
NO
YES
Replace the inverter PCB
(A3P).
If the inverter PCB gets
severely damaged, the
compressor and the fan
motor may have been
damaged.
Is the power
transistor normal?
YES
NO
Replace the inverter PCB
(A3P).
CHECK 4
The insulation
resistance of the fan motor
is less than
1 M.
NO
YES
Connect and disconnect the
connectors as shown in the
table.
A1P A3P
X20A X4A
X28A X6A
X40A X63A
Replace the fan motor
(M1F).
If the motor gets severely
damaged, the inverter
PCB (A3P) should also
be replaced.
A
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