SiBE121021_C
Troubleshooting for SA Indoor Unit - FFQ, FCQ, FDBQ, FBQ, FHQ Series
Service Diagnosis
321
Troubleshooting
Note:
If "
A3
" is detected by the indoor unit PCB which is not mounted with X15A, the indoor unit PCB
is defective.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Connect the drain pump.
Replace the indoor unit
PCB.
Replace the drain pump.
There is a drain system
abnormality.
Connect the float switch.
Replace the float switch.
Replace the indoor unit
PCB.
(R12861)
NO
YES
NO
YES
NO
Connect the short circuit
connector.
NO
Connect the short circuit
connector.
NO
YES
YES
Replace the indoor unit
PCB.
YES
NO
YES
NO
YES
NO
Is the drain water level
abnormally high?
YES
YES
Is the float switch
connected to X15A?
NO
Does
the drain pump work after
restarting operation?
YES
Remove the float switch from
X15A, short circuit X15A, and
restart operation.
NO
Is the unit a
ceiling suspended
type?
Is the optional drain
raising mechanism
connected?
Is the short circuit
connector connected
to X15A on the indoor
unit PCB?
Check the
continuity of the
short circuit
connector. Is there
continuity?
Is the drain pump
connected to the indoor
unit PCB?
Set to "emergency"
and check the voltage
of X25A. 220 - 240
VAC?
Does "
A3
" appear
on the remote
controller display?
