Daikin VRV-WIII RWEYQ72PTJU Service Manual page 195

SiUS30-1301
Service Diagnosis
and check
the operation.
Check if the condition
occurs again.
Power ON
start mode in
the high differential
pressure (not less
than 72.5
CHECK 4
Is the power
Power OFF
transistor normal?
Restart and
check if the error
Power ON occurs again.
Power OFF
Replace the inverter PCB.
Restart and
check if the error
Power ON
occurs again.
CHECK 4 Refer to P.244.
Troubleshooting by Indication on the Remote Controller
A
Restart
NO
YES
Is the
YES
psi)?
NO
NO
YES
NO
YES
NO
YES
Conclude the work
There is a possibility of defective
pressure equalizing.
Check the refrigerant circuit.
Defective of pressure equalizing
Check the refrigerant circuit.
Replace the inverter PCB.
Continue the operation.
(There is a possibility of
instantaneous power failure etc.)
Continue the operation.
Replace the inverter compressor.
* The inverter PCB is not defective.
Return the inverter PCB to
original position.
187