Daikin VRV EMERION REYQ-AATJA Service Manual page 411

SiUS372201EB
Reference
CHECK 4 Refer to page 454.
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.
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.
)
404