Daikin RQYQ140-180PY1 Service Manual page 126

Troubleshooting by Remote Controller
Troubleshooting
Power OFF
Power ON
Power OFF
Power ON
Power OFF
117
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Check if the
stop valve is
open.
YES
Check if the relay wires
to the compressor are
correct.
YES
Check if the connection
of UVW phase order is
correct.
YES
Check if the wiring is the
same as in the electric wiring
diagram.
YES
The insulation resistance of
the compressor is low (not
more than 100kW).
NO
The compressor coil
has disconnection of
wires.
NO
Restart and check the
operation. Check if the
condition occurs again.
YES
Check if the start
mode is in the high
differential pressure
(not less than 0.5
MPa).
NO
Check 4
Is the power transistor
normal?
YES
Restart
and check if the
malfunction occurs
again.
YES
Replace the inverter PCB
(A2P).
Restart
and check if the
malfunction occurs
again.
YES
NO
Local factor
Open the stop valve.
NO
Replace the connecting wires and
ensure right connection of the
connector.
NO
Ensure correct connection.
NO
Ensure correct connection.
Check if the wiring has
any error in mistake for
inverter compressor.
YES
Replace the compressor.
YES
NO
Conclude the work
YES
Defect of pressure equalizing
NO
Replace the inverter PCB (A2P).
NO
Continue the operation.
(There is a possibility of
instantaneous power failure etc.)
NO
Continue the operation.
Replace the inverter compressor.
SiBE341001
W
U
V
There is a possibility of defect of
pressure equalizing.
Check the refrigerant circuit.
Check the refrigerant circuit.
The inverter PCB is not
malfunction.
Return the inverter PCB to
original position.
Troubleshooting