Daikin RXYQ-TA Series Service Manual page 277

SiUS341615E
Service Diagnosis
A
Connect and disconnect the
following connectors:
RXYQ72-120TA: X4A (A3P)↔X20A (A1P)
X6A (A3P)↔X28A (A1P)
RXYQ144/168TA: X4A (A3P)↔X20A (A1P)
X6A (A3P)↔X28A (A1P)
X4A (A6P)↔X41A (A3P)
X6A (A6P)↔X61A (A3P)
The
inverter PCB
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
CHECK 4 Refer to page 295.
YES
YES
YES
YES
Troubleshooting by Error Code
Replace the inverter PCB
( 1).
If the inverter PCB gets
severely damaged, the
compressor and the fan
motor may have been
damaged.
1
RXYQ72-120TA: A3P
RXYQ144/168TA: A3P, A6P
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.
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