Daikin RZQG71~140L7V1B Service Manual page 197

Troubleshooting by Remote Controller
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Is the unit a cassette type?
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.
Error is displayed again?
YES
Note:
A3
If " " is detected by a PCB without X15A, the PCB is defective.
186
NO
Is the optional
YES
drain pump kit installed?
NO
Is the short
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
NO
Connect the short circuit
connector.
NO
Replace the short circuit
connector.
Replace the indoor unit PCB.
Connect the drain pump.
NO
Replace the indoor unit PCB.
Replace the drain pump.
Defective drain system
Connect the float switch.
Replace the float switch.
Replace the indoor unit PCB.
ESIE12-06
Service Diagnosis