Troubleshooting for SkyAir Indoor Unit SiAU18-715334 Troubleshooting5.3 Malfunction of Drain SystemRemoteControllerDisplayAFApplicableModelsFHQMethod ofMalfunctionDetectionWater leakage is detected based on float switch ON/OFF operation while the compressor is innon-operation.MalfunctionDecisionConditionsWhen the float switch changes from ON to OFF while the compressor is in non-operation.SupposedCauses Error in drain pipe installation Faulty float switch Faulty indoor unit PCBTroubleshootingIs drain-up kit installed?Are floatswitch and drain pipenormal?Is waterdrainage systemnormal?Is drain pump normal?Is amountof circulated drainwater excessive afterpump stopsoperation?Doesdrain water flow inreverse duringnonoperation?Possible failure of float switch.Check to see if drain-up heightand horizontal pipe lengthexceed specifications.Clogged drain water dischargesystemReplace indoor unit PCB.Check jumper connectorX15A.Check drain pump and drainpipe.Check water drainage system.Check to see if drain-up heightand horizontal pipe lengthexceed specifications.Faulty trap in water drainagesystemReplace indoor unit PCB.∗In FHQ-B problems can also occur inthe optional drain-up kit.(Q0533)NONONONONONOYESYESYESYESYESYESClogged drain pumpFaulty float switchCautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.
