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SiUS30-1301
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
169
3.
8
Drain Level above Limit
Error Code
AF
Applicable
Models
FXFQ, FXZQ, FXMQ, FXDQ
Method of Error
Detection
Water leakage is detected based on float switch ON/OFF operation while the compressor is in non-
operation.
Error Decision
Conditions
When the float switch changes from ON to OFF while the compressor is in non-operation.
Error code is displayed but the system operates continuously.
Supposed
Causes
Humidifier unit (optional accessory) leaking
Defective drain pipe (upward slope, etc.)
Defective indoor unit PCB
Troubleshooting
Modify the drain piping.
YES
YES
NO
Field
drain piping
has a defect such as
upward sloping.
NO
A
humidifier
unit (optional
accessory) is installed
on the indoor
unit.
Defective indoor unit PCB.
Check if the humidifier unit is
leaking.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.