Daikin VRVIII-S, Service Manual

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SiENBE34-703 Troubleshooting by Indication on the remote control
Troubleshooting 131
3.7 “
AF
” Indoor Unit: Drain Level above Limit
remote control
Display
AF
Applicable
Models FXCQ, FXSQ, FXKQ, FXMQ, FXDQ
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
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Caution
Defect of indoor unit PC board.
Modify the drain piping.
Check if the humidifier unit is
leaking.
(V2782)
Field drain piping has a
defect such as upward
sloping.
A humidifier unit
(optional accessory)
is installed on the
indoor unit.
YES
YES
NO
NO