Daikin VRV S RXQ4/5ARV1, Service Manual

Page: 218 / 377

Troubleshooting by Error Code SiAF332111E
212 Part 6 Service Diagnosis
5.10 Humidifier System Abnormality
Applicable
Models
FXFSQ-AR, FXMQ-PB
Error Code
AF
Method of Error
Detection
Water leakage from the humidifier system is detected based on float switch ON/OFF operation
while the compressor is not in operation.
Error Decision
Conditions
The float switch changes from ON to OFF while the compressor is not in operation.

Error code is displayed but the system operates continuously.
Supposed
Causes
 Humidifier unit (optional accessory) leaking
 Defective drain piping (upward slope, etc.)
 Defective indoor unit control PCB
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Defective indoor unit
control PCB (A1P).
Modify the drain piping.
YES
NO
NO
YES
Check if the humidifier unit is
leaking.
Field drain
piping has a defect such as
upward sloping.
A humidifier
unit (optional accessory) is
installed on the
indoor unit.