SiBE121021_C
Troubleshooting for SA Indoor Unit - FFQ, FCQ, FDBQ, FBQ, FHQ Series
Service Diagnosis
325
6.5
Drain System Abnormality
Remote
Controller
Display
AF
Method of
Malfunction
Detection
Water leakage is detected based on the float switch ON/OFF changeover while the compressor
is not operating.
Malfunction
Decision
Conditions
When the float switch changes from ON to OFF while the compressor is OFF
Supposed
Causes
Error in the drain pipe installation
Defective float switch
Defective indoor unit PCB
Troubleshooting
NO
YES
YES
YES
YES
NO
NO
NO
NO
NO
YES
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
The float switch may be
defective. Check to see if
the drain-up height and the
horizontal pipe length
exceed the specifications.
Clogged water drain
system, clogged drain
pump, or faulty float switch
Replace the indoor unit
PCB. Check to see if the
drain-up height and the
horizontal pipe length
exceed the specifications.
Check the water drain
system.
Check to see if the drain-up
height and the horizontal
pipe length exceed the
specifications.
Faulty trap in the water
drain system
Replace the indoor unit
PCB.
(R13752)
Check the jumper
connector.
Check the drain pump and
the drain pipe.
Are
the float switch and
the drain pipe
normal?
Is a drain-up kit installed?
Is the drain pump
normal?
Is
the amount of
circulated drain water
excessive after the pump
stops operation?
Is the
water drain system
normal?
Does the
drain water flow in
reverse while the indoor unit
is not operating?
∗
In FHQ, problems can also occur
in the optional drain pump.
