Pcb - Daikin VRV-WIII RWEYQ72PTJU Service Manual

SiUS30-1301
Troubleshooting
1: Disconnect the connector once, then reconnect it and check that it is securely connected.
Note:
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Are the
connectors of the
condensing unit main 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
100kW.
NO
The fan
motor has insulation
resistance of not more
than 1MW.
NO
The
micro-computer
normal monitor (green)
of the condensing unit main
PCB (A1P) is
blinking.
YES
The
micro-computer
normal monitor (green) of
the inverter PCB is
blinking.
YES
Error is displayed
again?
NO
Troubleshooting by Indication on the Remote Controller
NO
NO
YES
YES
NO
NO
YES
Properly connect the connectors.
Replace it with a correct PCB.
Replace the INV. compressor
(M1C).
Replace the fan motor.
Not the "LC" error. Check the error
code again.
Replace the inverter PCB.
Replace the condensing unit main
PCB (A1P).
Continue the operation.
(It is supposed that the error
results from causes such as
instantaneous power failure.)
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