Troubleshooting for SA Indoor Unit SiBE121135_A
185 Service Diagnosis
6.2 Drain Level Control System Abnormality
Error Code A3
Method of Error
Detection
The float switch detects error.
Error Decision
Conditions
When the water level reaches its upper limit and when the float switch turns OFF
Supposed
Causes
Defective drain pump
Improper drain piping work
Clogged drain piping
Defective float switch
Defective indoor unit PCB
Defective short circuit connector X15A on indoor unit PCB