Daikin RXYQ72, Serivce Manual

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SiUS39-601 Troubleshooting by Indication on the Remote Controller
Troubleshooting 129
2.7
“
AF
”
Indoor Unit: Drain Level above Limit
Remote
Controller
Display
AF
Applicable
Models FXFQ, FXDQ, FXSQ, FXMQ, FXHQ
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.
Supposed
Causes
„
Humidifier unit (optional accessory) leaking
„
Defect of drain pipe (upward slope, etc.)
„
Defect of indoor unit PC board
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Defect of indoor unit PC board.
Modify the drain piping.
YES
NO
NO
Field drain
piping has a defect such as
upward sloping.
Check if the humidifier unit is
leaking.
YES
A humidifier
unit (optional accessory)
is installed on the
indoor unit.
(V2782)