Daikin Aurora Series, Service Manual, Page: 255 / 333

SiUS341802E Troubleshooting by Error Code
Service Diagnosis 242
Refer to page 286.
Power OFF
Power OFF
YES
YES
Restarting the
system results in the
recurrence of the
error.
Difference
between High
pressure and Low pressure
before the compressor
restart is below 0.2
MPa?
Continue operation.
Replace the
compressor.
Connect to power supply
within ±10% of the rated
voltage.
NO
NO
Pressure equalization
failure. Check the
refrigerant system.
Power
supply voltage
falls within ±10% of the
rated voltage?
YES
YES
Replace the inverter PCB.
Restarting the
system results in the
recurrence of the
error.
Continue operation.
The error could have
resulted from causes
such as instantaneous
power failure.
NO
NO
( )
A
YES
Replace the inverter
PCB.
RXLQ-TATJU,
RXLQ-TAYDU: A3P
RXLQ-TAYCU,
RXYQ-TAYCU: A4P
NO
CHECK 4
Is the power
transistor normal?
Power OFF
CHECK 4