Daikin Aurora Series Service Manual page 245

SiUS341802E
Troubleshooting
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Turn OFF the power supply
once, and then turn it ON
again.
Return to normal?
NO
CHECK 4
Is the power
transistor normal?
YES
CHECK 4
Is the power
transistor of the fan
driver normal?
YES
Model Inverter PCB (∗1)
RXLQ-TATJU
RXLQ-TAYDU
RXLQ-TAYCU
RXYQ-TAYCU
CHECK 4 Refer to page 286.
YES
NO
Is the
insulation to
ground resistance of
the relevant compressor
100 kΩ or
more?
YES
NO
Fan PCB (∗2)
M1F: A4P
A3P
M2F: A5P
M1F: A4P
A3P
M2F: A5P
M1F: A6P
A4P
M2F: A5P
M1F: A6P
A4P
M2F: A5P
Troubleshooting by Error Code
The error could have resulted from
external factors other than failures
(e.g. external noise or thunder).
NO
Replace the compressor and the
inverter PCB together (∗1).
Replace the inverter PCB (∗1).
Replace the inverter PCB
fan PCB (∗2).
Replace the inverter (∗1)
(∗1) and the
PCB.
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