Daikin FCQ35B7V1 Service Manual

Contents

Daikin FCQ35B7V1 Service Manual Manual pdf 166 page image

Troubleshooting ESIE05-043–4 Part 3 – Troubleshooting313451.2 General Troubleshooting FlowchartFind out the situation according to the following procedure when there is a request for service from thecustomer.YESNO NO NONONO CoolingHeatingNONOYESYESYESRunsRunsNomalNomalDoesn't runYESYESYESNOYES(Service work required)OK.We'll be right over.(S1989)Troubleshooting by remotecontroller malfunctioncode.Turn the power supplyswitch ON or replacethe fuse.Wait untilpower failureis over.Is there apowerfailure?Doesn't run at allThe power supply switch isOFF or the switch's fuse isburnt.Set the remotecontroller's temperaturesetting to:(1)Whencooling:Minimum(2)Whenheating:MaximumThe fan comes onbut thecompressordoesn't run.Cooling starts butstops right away.Is the remotecontroller's operationlamp blinking?Is the remote controller'soperation lamp blinking?Machines equipped withwireless remote controllers only.Is the operation lamp of theindoor unit's signal receivingsection blinking?Is the operation lamp of theindoor unit's signal receivingsection blinking?Units equipped with wirelessremote controller only.Troubleshooting by remotecontroller malfunctioncode.Ask for the charactercode of the malfunctioncode.Refer to "Remote controller displaymalfunction code and contents".Units equipped with liquidcrystal remote controllers onlyUnits equipped with wirelessremote controllers onlyIs the remotecontroller's operationlamp blinking?Try turning theOperation switch OFFand On.The unit won't runagain for a whileafter stopping.The unit runs butdoesn't cool theroom.Is the operation lamp ofthe indoor unit's signalreceiving sectionblinking?Measure the suction/disharge temperature.Units equipped with liquidcrystal remote controllers onlyUnits equipped with wirelessremote controllers onlyDid you allow 3 minutes toelapse after turning ON?Is there something causing theindoor load to be large, such asan open window or door?(Temperature differential=suction temperature - discharge temperature)Units equipped with liquidcrystal remote controllers onlyOperation isnormal.Temperaturedifferential is 8~18˚CThe units runs butdoesn't heat theroom.Measure the suction/discharge temperature.Is there something causing theindoor heat load to be large, suchas an open window or door?(Temperature differential=discharge temperature - suction temperature)Operation isnormal.Temperaturedifferential is 14~30˚C(1) The operation circuit fuse isdisconnected or is making poor contact.(2) The operation swich is broken or itscontact is defective.(3) The high pressure switch is broken.(4) The fan motor's magnetic switch isbroken.(5) The fan motor's overcurrent relay isbeing actuated or is broken.(6) The compressor's overcurrent relay isbroken.(7) The compressor's protective thermostatis broken.(8) The electrical system insulation isdefective.(9) The compressor's magnetic switch'scontact is defective.(10) The compressor is broken.(11) Thermostat is broken.(12) The cool/heat selector is broken.(13) The operation switch is broken.(14) The compressor's magnetic swich isbroken.(15) Over-charged with refrigerant.(16) Air is mixed inside the refrigerantcircuit.(17) The pressure switch is broken.(18) The outdoor unit fan motor's magneticswitch is broken.(19) The outdoor unit fan motor's auxiliaryrelay is broken.(20) The outdoor unit's heat exchanger isdirty.(21) There is something blocking theoutdoor unit's air flow.(22) Malfunction of the outdoor unit's fan.(23) The indoor unit's air filter is dirty.(24) The indoor unit's heat exhanger isdirty.(25) There is something blocking the indoorunit's air flow.(26) Malfunction of the indoor unit's fan.(27) Overcurrent relay (for compressor)(28) Compressor's protective themostat(29) The causes for the overcurrent relay(for compressor) being actuated are:(29)-1 Power supply voltage is lower thanprescribed.(29)-2 High pressure is too high.(29)-3 The power supply cord is too small.(29)-4 The compressor is broken.(30) The causes for the compressor'sprotective thermostat(30)-1 Internal leak of the-4way valve(No substantial difference betweensuction and discharge temperature.(30)-2 Unsatisfactory compression fromthe compressor(30)-3 Different kind of refrigerant is charged.(30)-4 Malfunction of the expansion valve(30)-5 Unsatisfactory refrigerant circulation