SiUS281117
Troubleshooting by Remote Controller
120
Service Diagnosis
2.13 Drain System Abnormality
Remote
Controller
Display
AF
Applicable
Models
All indoor models
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
The float switch changes from ON to OFF while the compressor is OFF.
Error code is displayed but the system operates continuously.
Supposed
Causes
Error in the drain pipe installation
Defective float switch
Defective indoor unit PCB
Defective connector connection
Defective drain pump
Troubleshooting
Possible defective float
switch.
Check to see if drain-up
height and horizontal pipe
length exceed specifications.
Are float
switch and drain pipe
normal?
Clogged drain water
discharge system
Clogged drain pump.
Defective float switch
Is the
water drainage system
normal?
Replace the indoor unit PCB.
Check to see if drain-up
height and horizontal pipe
length exceed specifications.
NO
NO
YES
YES
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution