York IDM030B21E Series Service Manual

Contents

York IDM030B21E Series Service Manual Manual pdf 56 page image

3-34 SM-16005-rev.2TROUBLESHOOTINGIf there is no abnormality (Alarm Code) indicated on the wired controller, and normal operation is notavailable, take necessary action according to the following procedures.OtherAbnormalities Abnormalities of Devices3.2.3 Abnormalities of Devices*1): For CIW01, refer to Section 3.1.4 (3).*2): For CIW01, refer to Section 3.1.4 (2).*3): Even if controllers are normal, the compressor does not operate under the following conditions.* Indoor Air Temp. is lower than 69.8°F (21°C) or Outdoor Air Temp. is lower than 23°F (-5°C) during coolingoperation.* Indoor Air Temp. is higher than 86°F (30°C) or Outdoor Air Temp. is higher than 73.4°F (23°C) during heatingoperation.* When a cooling (or heating) operation signal is given to the outdoor unit and a different operation signal is givento indoor units.* When demand signal or emergency stop signal is given to outdoor unit.Cause Check Item Action(Turn OFF Main Switch)EventMeasure coilresistance with tester. Replace indoor unitfan motor.Failure ofIndoor UnitFan MotorDisconnectedCoil"RUN" Indicatorand LCD are ON.However, thesystem doesnot operate.(example)Indoor/outdoorfans orcompressordo not operate.The Comp.does not Stopor Start evenif the temperaturesetpointon the LCD isChanged *3)Measure insulationresistance.Burned-OutCoilMeasure coilresistance with tester. Replace outdoor unitfan motor.Failure ofOutdoor UnitFan MotorDisconnectedCoilMeasure insulationresistance.Burned-OutCoilCheck connection.Failure ofOne of PCBs DisconnectedWire to PCBCheck PCB inself-checking mode *1).Correctly connectwires.Replace PCB if faulty.Check it inself-checking mode *1).Check it inCheck Mode *2).Failure ofPCBReplace or correctlyconnect wiresif abnormal.Failure ofAir InletThermistorFailure ofThermistorDisconnectionof ThermistorCheck whether magneticswitch is activatedcorrectly.Replace magneticswitch.Replace PCB if faulty.Failure ofMagneticSwitch forComp.ContactFailureMeasure resistancebetween wires.Replace compressor.Failure of Comp. MotorCheck for abnormalsound from comp.Failure of Comp.Abnormality ofWired Zone Controller Cord Check it in Run Test.Failure of Indoor Unit PCBforoutdoor unit,indoor unit,wired zonecontrollerCheck it in Test Run.Abnormality ofWired Controller Cable