Humidifier Or Related Abnormality - Daikin RX-W Series Service Manual

SiUS092230EA
6.5

Humidifier or Related Abnormality

AF
Error Code
Method of Error
Water leakage from humidifier(s) is detected based on the float switch ON/OFF changeover while
Detection the system is not operating.
Error Decision
The float switch changes from ON to OFF while the system is OFF
Conditions
Supposed
 Defective float switch
Causes  Error in water drain system of humidifier(s)
 Clogged electric expansion value in humidifier(s)
 Defective indoor unit PCB
Troubleshooting
Note
The system continues to operate with the thermostat OFF even while the error code is displayed.
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Humidifier(s)
connected to the system?
YES
Is the water
drain system of the
humidifier normal?
YES
Troubleshooting for FDMQ, FFQ Series
NO
NO
The float switch may be
defective. Check if the
drain-up height and the
horizontal pipe length
exceed the specifications.
Clogged water drain
system, clogged drain
pump, or faulty float switch
Replace the indoor unit
PCB (control PCB).
(R24055)
147