SiUS092230EA
Troubleshooting for FDMQ, FFQ Series
Part 6 Service Diagnosis
147
Note
6.5 Humidifier or Related Abnormality
Error Code
AF
Method of Error
Detection
Water leakage from humidifier(s) is detected based on the float switch ON/OFF changeover while
the system is not operating.
Error Decision
Conditions
The float switch changes from ON to OFF while the system is OFF
Supposed
Causes
Defective float switch
Error in water drain system of humidifier(s)
Clogged electric expansion value in humidifier(s)
Defective indoor unit PCB
Troubleshooting
The system continues to operate with the thermostat OFF even while the error code is displayed.
YES
YES
NO
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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)
Humidifier(s)
connected to the system?
Is the water
drain system of the
humidifier normal?
Summary of Contents for RX-W Series
Page 1: ... Applied Models Inverter Pair Heat Pump Service Manual SiUS092230EA Inverter Pair RX W Series ...
Page 207: ...SiUS092230EA Check Part 6 Service Diagnosis 201 15 18 24 class R25105 1 2 3 4 Multimeter ...
Page 209: ...SiUS092230EA Check Part 6 Service Diagnosis 203 15 18 24 class R20704 W V U DC_P1 DC_N1 ...
Page 239: ...SiUS092230EA Piping Diagrams Part 8 Appendix 233 RX24WMVJU9 3D141502 ...