Daikin RQYQ140-180PY1 Service Manual page 159

SiBE341001
Troubleshooting
*1. Disconnect the connector once, then reconnect it and check that it is securely connected.
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Are the
connectors of the
control PCB, and
inverter PCB all securely
connected?
(*1)
YES
Is the type of
the inverter PCB
correct?
YES
The INV.
compressor has
insulation resistance of
not more than
100kΩ.
NO
The fan
motor has insulation
resistance of not more
than 1MΩ.
NO
The
micro-computer
NO
normal monitor (green)
of the main PCB (A1P)
is blinking.
YES
The
micro-computer
NO
normal monitor (green)
of the inverter PCB (A3P)
is blinking.
YES
YES
The LC malfunction reours.
NO
NO
NO
YES
YES
Troubleshooting by Remote Controller
Properly connect the connectors.
Replace it with a correct PCB.
Replace the INV. compressor
(M1C).
Replace the fan motor.
Not the LC malfunction. Check the
malfunction code again.
Replace the inverter PCB (A3P).
Replace the main PCB (A1P).
Continue the operation.
(It is supposed that the
malfunction results from causes
such as instantaneous power
failure.)
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