SiBE121135_A Troubleshooting for SA Indoor UnitService Diagnosis 1946.5 Drain System AbnormalityError Code AFMethod of ErrorDetectionWater leakage is detected based on the float switch ON/OFF changeover while the compressoris not operating.Error DecisionConditionsWhen the float switch changes from ON to OFF while the compressor is OFFSupposedCauses Error in the drain pipe installation Defective float switch Defective indoor unit PCBTroubleshootingYESYESNONOCautionBe sure to turn off the power switch before connecting or disconnectingconnectors, or parts may be damaged.The float switch may bedefective. Check if thedrain-up height and thehorizontal pipe lengthexceed the specifications.Clogged water drainsystem, clogged drainpump, or faulty float switchReplace the indoor unitPCB. Check if the drain-upheight and the horizontalpipe length exceed thespecifications.(R16022)Arethe float switch andthe drain pipenormal?Is thewater drain systemnormal?NOYESYESNONONOYESYESCheck the water drainsystem.Check to see if the drain-upheight and the horizontalpipe length exceed thespecifications.Faulty trap in the waterdrain systemReplace the indoor unitPCB.(R13752)Check the jumperconnector.Check the drain pump andthe drain pipe.Is a drain-up kit installed?Is the drain pumpnormal?Isthe amount ofcirculated drain waterexcessive after the pumpstops operation?Does thedrain water flow inreverse while the indoor unitis not operating?∗ In FHQ, problems can also occur inthe optional drain pump.
