Daikin RXQ12AHR Service Manual page 259

SiAF341904E
Check in Monitor Mode
For the models equipped with 2 compressors, check
the compressor M1C or M2C applicable to the error
code LC while in monitor mode of the outdoor unit.
Does the
relevant inverter PCB part No.
match that of the spare parts
insulation
resistance of the relevant
inverter compressor is
not more than
100 kΩ.
The insulation
resistance of the
relevant fan motor is
not more than
1 MΩ.
microcomputer normal
monitor indication lamp (green)
on the outdoor unit main
PCB (A1P) is
blinking.
microcomputer normal
monitor indication lamp (green)
on the outdoor unit main
PCB (A1P) is
blinking.
Is the
connector
between the outdoor unit
main PCB and the inverter
PCB securely
connected?
The LC error recurs.
Note(s)
1. Connect and disconnect the connector once to ensure that it is securely connected.
Part 6 Service Diagnosis
A
NO
list?
YES
The
YES
NO
YES
NO
The
NO
YES
The
NO
noise filter PCB has blown
YES
NO
YES
YES
NO
Replace with a proper PCB.
Replace the compressor.
RXQ6-14A: M1C
RXQ16-20A: M1C, M2C
Replace the fan motor.
This is not the LC error.
Recheck the error code.
The fuse of the
NO
Replace the inverter PCB. (#1)
#1
out.
RXQ6-14A: A3P
RXQ16-20A: A3P, A6P
YES
Replace the reactor and all of the
inverter (#1), fan (#2),
and noise filter (#3) PCBs.
#2
RXQ6-12A: A4P
RXQ14-20A: A4P, A7P
#3
RXQ6-12A: A2P
RXQ14A: A5P
RXQ16-20A: A2P, A5P
Properly connect the connector.
Replace the outdoor unit main PCB
(A1P).
Continue operation.
Troubleshooting by Error Code
The error could have resulted from
causes such as instantaneous
power failure.
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