Daikin RXQ12AHR Service Manual page 201

SiAF341904E
Troubleshooting
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check the condition of the power
supply.
Check if power supply voltage is
220-240 V±10%.
There are
problems
on the condition of power
supply described
above.
NO
Is the X27A
connector on the main
PCB properly connected?
YES
Is the
harness connecting
the X27A and the terminal block
(X2M) disconnected?
NO
Is there any external
factor such as noise?
NO
Turn OFF the power once and turn
ON again.
p
Start operation by remote
controller.
Does the error
A8 reoccur?
YES
YES
NO
YES
YES
NO
Troubleshooting by Error Code
Correct any fault.
Properly connect the connector.
Replace the harness.
Remove the external factor.
Normal.
Replace the indoor unit PCB
(A1P).
195