SiBE31-801_C Troubleshooting by Indication on the Remote Controller
Troubleshooting 236
4.7 “
AF
” Indoor Unit: Drain Level above Limit
Remote
Controller
Display
AF
Applicable
Models
FXCQ, FXZQ, FXFQ, FXSQ, FXKQ, FXMQ, FXDQ, FXMQ-MF, FXUQ
Method of
Malfunction
Detection
Water leakage is detected based on float switch ON/OFF operation while the compressor is in
non-operation.
Malfunction
Decision
Conditions
When the float switch changes from ON to OFF while the compressor is in non-operation.
★
Error code is displayed but the system operates continuously.
Supposed
Causes
Humidifier unit (optional accessory) leaking
Defect of drain pipe (upward slope, etc.)
Defect of indoor unit PCB
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
NO
YES
Modify the drain piping.
NO
YES
Check if the humidifier unit is
leaking.
Defect of indoor unit PCB.
Field drain piping has a
defect such as upward
sloping.
A humidifier unit
(optional accessory) is
installed on the indoor
unit.
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