Carrier 53KLE-H SERIES Service Maintenance Manual

Contents

2419. TROUBLE SHOOTINGTROUBLE REASON ACTIONCompressor and outdoor fan will notstartPower failureFuse blown or / and circuit breaker trippedDetective contactorLow line voltageIncorrect or loose wiringTemp. setting too lowCall power companyReplace fuse or reset circuit breakerReplaceDetermine cause and eliminateCheck wiring diagram and rewire correctlyReset temp. settingCompressor will not start, but outdoorfan runsFaulty wiring or loose connections incompressor circuitCompressor motor burned out, stuck orinternal over-load openDetective run capacitorCheck wiring and repair or correctReplace compressor and determine causeReplaceCompressor runs bur cycles oninternal overload (other than normallysatisfying thermostat)Refrigerant over or under chargeAir or non condensable refrigerant insystemDetective compressorLow or too high line voltageBlocked outdoor coilOutdoor fan stoppedDetective run capacitorFaulty fan motor of outdoor sectionRestriction in refrigerant systemCapillary or Accurate restricted or iceclogged.Blow refrigerant, evacuate system andrechargeBlow refrigerant, evacuate system andrechargeReplace and determine causeDetermine cause and correctDetermine cause and replaceDetermine cause and replaceReplaceReplaceLocate restriction and removeBlow refrigerant, evacuate system andrechargeCompressor operates continuously System undersized for loadTemp. setting too lowDefective outdoor fanAir or non condensable refrigerant insystemAir restricted or indoor section filter dirtyDecrease load or increase system sizeReset temp. settingCheck for source and replaceBlow refrigerant, evacuate system andrechargeClean filter or remove restrictionExcessive head pressure Dirty outdoor coilDetective outdoor fanRefrigerant over chargedAir or non condensable refrigerant insystemOutdoor section air restrictedClean coilReplacePurge excess refrigerantBlow refrigerant, evacuate system andrechargeRemove restricted