Daikin RZQ Series FCQ20EVA Service Manual page 103

SiME281501E
Troubleshooting
Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
Is the optional
drain raising mechanism
connected?
YES
Is a drain pump
connected to the indoor unit
PCB?
YES
Does the drain
pump work after restarting
operation?
YES
Is the drain water level
abnormally high?
NO
Is the float switch
connected to X15A?
YES
Remove the float switch from X15A,
short-circuit X15A, and restart
operation.
A3
Does " "
appear on the remote controller
display?
YES
Note:
A3
If " " is detected by a PCB which is not mounted with X15A, the PCB is defective.
Service Diagnosis
Is the short
NO
circuit connector connected
to X15A on the indoor
unit PCB?
YES
Check the
continuity of the short
circuit connector. Is there
continuity?
YES
NO
Set to "emergency"
NO
and check the voltage of X25A.
220-240 VAC?
YES
YES
NO
NO
Troubleshooting by Remote Controller
NO
Connect the short circuit
connector.
NO
Connect the short circuit
connector.
Replace the indoor unit PCB.
Connect the drain pump.
NO
Replace the indoor unit PCB.
Replace the drain pump.
There is an error of the drain
system.
Connect the float switch.
Replace the float switch.
Replace the indoor unit PCB.
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