Daikin RXYQ96PYDN Service Manual page 365

Troubleshooting by Indication on the Remote Controller
AF
3.7 Indoor Unit: Drain Level above Limit
AF
Remote
Controller
Display
Applicable FXFQ, FXSQ, FXMQ, FXDQ
Models
Method of
Water leakage is detected based on float switch ON/OFF operation while the compressor is in non-
Malfunction operation.
Detection
Malfunction
When the float switch changes from ON to OFF while the compressor is in non-operation.
Decision
Conditions
Supposed
Causes
Troubleshooting
350
Error code is displayed but the system operates continuously.
Humidifier unit (optional accessory) leaking
Defect of drain pipe (upward slope, etc.)
Defect of indoor unit PC board
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Field drain
piping has a defect such as
upward sloping.
NO
A humidifier
unit (optional accessory)
is installed on the
indoor unit.
NO
YES
YES
SiUS34-801A_b
Modify the drain piping.
Check if the humidifier unit is
leaking.
Defect of indoor unit PC board.
(V2782)
Troubleshooting