Daikin VRV RXYQ72-384XAYCA Service Manual page 321

SiUS342004EB
Reference
CHECK 4 Refer to page 362.
Part 6 Service Diagnosis
A
Power OFF
CHECK 4
Is the power
transistor normal?
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?
Power OFF Replace the inverter PCB.
Restarting
the system results in
the recurrence
of the error.
Power
supply voltage
Power OFF
falls within ±10% of the
rated voltage?
NO
YES
NO
YES
NO
YES
NO
YES
YES
NO
Troubleshooting by Error Code
Replace the inverter
PCB (A4P).
Continue operation.
(
The error could have
resulted from causes
such as instantaneous
power failure.
Pressure equalization
failure. Check the
refrigerant system.
Continue operation.
Replace the
compressor.
Connect to power supply
within ±10% of the rated
voltage.
)
314