Daikin RXQ12AHR Service Manual page 270

Troubleshooting by Error Code
Reference
CHECK 4 Refer to page 290.
264
A
The insulation
resistance of the fan
motor is not more
than 1 MΩ.
NO
CHECK 4
Is the power
transistor normal?
YES
Connect and disconnect the
connectors as shown in the
table.
The
inverter PCB (#1)
has damage.
NO
Turn ON the power supply,
and then press the ON button.
The
system enters
standby mode before the
outdoor fan starts
rotating.
NO
The
system enters
standby mode before
completing the startup
operation of the
compressor.
NO
The error U2 recurs.
NO
YES
NO
RXQ6-14A
A1P A3P A1P
X20A X4A X20A
X28A X6A X28A
X40A X63A X40A
X41A
YES
YES
YES
YES
SiAF341904E
Replace the fan motor.
If the motor gets severely
damaged, the inverter
PCB (#1) should also be
replaced.
#1
RXQ6-12A: A4P
RXQ14-20A: A4P, A7P
Replace the inverter PCB.
(1)
RXQ16-20A
A3P A6P
X4A
X6A
X63A
X63A
X41A X4A
X61A X6A
Replace the inverter PCB
(#1).
If the inverter PCB gets
severely damaged, the
compressor and the fan
motor may have been
damaged.
Replace the inverter PCB
(#1).
Replace the inverter PCB
(#1).
If the inverter PCB gets
severely damaged, check
for the compressor.
Check for wirings.
Continue operation.
The error could have
resulted from causes such
as instantaneous power
failure.
Part 6 Service Diagnosis