SiBE341027
Troubleshooting by Remote Controller
Service Diagnosis
111
Troubleshooting
Refer to P.182
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is the stop valve
open?
Are the relay wires
to the compressor
correct?
Is the connection of
UVW phase order
correct?
Is the wiring the
same as in the electric
wiring diagram?
The insulation resistance of the
compressor is low (not more than
100kW).
The compressor coil has
disconnection of wires.
Restart and check the
operation. Check if the
condition occurs again.
Restart and
check if the error
occurs again.
Restart and
check if the error
occurs again.
Is the start mode in
the high differential
pressure (not less
than 0.5 MPa)?
CHECK 4
Is the power transistor
normal?
NO
YES
NO
YES
NO
YES
NO
YES
YES
NO
YES
YES
NO
NO
NO
YES
YES
YES
NO
NO
YES
NO
Local factor
Open the stop valve.
Replace the relay wires and
ensure right connection of the
connector.
Ensure correct connection.
Ensure correct connection.
Replace the compressor.
Conclude the work
There is a possibility of defective
pressure equalizing.
Check the refrigerant circuit.
Defective pressure equalizing
Check the refrigerant circuit.
Replace the inverter PCB (A4P).
Continue the operation.
(There is a possibility of
instantaneous power failure etc.)
Replace the inverter compressor.
∗
The inverter PCB is not
defective.
Return the inverter PCB to
original position.
Continue the operation.
U
W
V
Check if the wiring has
any error in mistake for
inverter compressor.
Power OFF
Power ON
Power OFF
Power ON
Power OFF
Replace the inverter PCB
(A4P).
CHECK 4
