Troubleshooting for FFQ Series SiUS181631EA208 Troubleshooting5.2 Drain Level Control System AbnormalityError Code A3Method of ErrorDetectionThe float switch detects error.Error DecisionConditionsThe water level reaches its upper limit and the float switch turns OFF.SupposedCauses 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 PCBTroubleshootingCautionBe sure to turn off the power switch before connecting or disconnectingconnectors, or parts may be damaged.Connect the drain pump.Replace the indoor unitPCB (control PCB).Replace the drain pump.There is a drain systemabnormality.Connect the float switch.Replace the float switch.Replace the indoor unitPCB (control PCB).(R23965)NOYESNONOYES YESIs the drainpump connected to theindoor unit PCB?NOIs the drain water levelabnormally high?YESYESIs the float switchconnected to X15A?NODoes thedrain pump work afterthe power supply ison?Is thevoltage of connector X25A13VAC?YESRemove the float switch fromX15A, short circuit X15A, andrestart operation.NODoes A3appear on the remotecontroller display?
