SiBE121123_A Troubleshooting for SA Indoor Unit
Service Diagnosis 172
6.4 Drain System Abnormality
Error Code
AF
Method of Error
Detection
Water leakage is detected based on the float switch ON/OFF changeover while the compressor
is not operating.
Error 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
YES
YES
NO
NO
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 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 if the drain-up
height and the horizontal
pipe length exceed the
specifications.
(R16022)
Are
the float switch and
the drain pipe
normal?
Is the
water drain system
normal?
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