Drain Level Above Limit - Daikin VRV RXYQ72-384XAYCA Service Manual

SiUS342004EB

3.17 Drain Level above Limit

Applicable
FXFQ-AA, FXFQ-T, FXZQ-TA, FXZQ-TB, FXUQ-P, FXUQ-PA, FXEQ-P, FXDQ-M, FXSQ-TA,
Models
FXSQ-TB, FXMQ-PB, FXMQ-TB, FXMQ-TA (Option)
AF
Error Code
Method of Error
Water leakage is detected based on float switch ON/OFF operation while the compressor is not in
Detection operation.
Error Decision
When the float switch changes from ON to OFF while the compressor is not in operation.
Conditions  Error code is displayed but the system operates continuously.
Supposed
 Humidifier unit (optional accessory) leaking
Causes  Defective drain pipe (upward slope, etc.)
 Defective indoor unit control PCB
Troubleshooting
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Field
drain piping
YES
has a defect such as
upward sloping.
NO
A
humidifier
unit (optional
YES
accessory) is installed
on the indoor
unit.
NO
Troubleshooting by Error Code
Modify the drain piping.
Check if the humidifier unit is
leaking.
Defective indoor unit control
PCB (A1P).
252