Daikin RR20AVAK9 Installation & Service Reference

Contents

Daikin RR20AVAK9 Installation & Service Reference Manual pdf 12 page image

12Troubleshooting InformationComplaint Unsatisfactory CoolingPOSSIBLE CAUSEDOTS IN ANALYSISGUIDE INDICATE"POSSIBLE CAUSE"SYMPTOMSystem will not startCompressor will not start - fan runsCompressor and Condenser Fan will not startEvaporator fan will not startCondenser fan will not startCompressor runs - goes off on overloadCompressor cycles on overloadSystem runs continuously - little coolingToo cool and then too warmNot cool enough on warm daysCertain areas to cool others to warmCompressor is noisyLow suction pressureLow head pressureHigh suction pressureHigh head pressureTest MethodRemedyPower Failure · Test VoltageBlown Fuse · · · Impact Fuse Size & TypeLoose Connection · · · · Inspect Connection - TightenShorted or Broken Wires · · · · · · Test Circuits with OhmmeterOpen Overload · · Test Continuity of OverloadsFaulty Thermostat · · · · Test Continuity of Thermostat and WiringFaulty Transformer · · Check Control Circuit with VoltmeterShorted or Open Capacitor · · · · Test CapacitorInternal Compressor Overload Open · Test Continuity of OverloadShorted or Grounded Compressor · · Test Motor WindingsCompressor Stuck · · Use Test CordFaulty Compressor Contactor · · · · Test Continuity of Coil and ContactsFaulty Fan Relay · Test Continuity of Coil and ContactsOpen Control Circuit Test Control Circuit with VoltmeterLow Voltage · · · Test VoltageFaulty Evaporator Fan Motor · · Repair or ReplaceShorted or Grounded Fan Motor · · · Test Motor WindingsImproper Cooling Anticipator · Check Resistance of AnticipatorShortage or Refrigerant · · · · Test For Leaks, Add RefrigerantRestricted Liquid Line · · · · Replace Restricted PartUndersized Liquid Line · · · Replace LineUndersized Suction Line · Replace LineNot Enough Air across Indoor Coil · · · · Speed Blower, Check Duct Static PressureToo Much Air across Indoor Coil · Reduce Blower SpeedOvercharge of Refrigerant · · · · · Recover Part of ChargeNoncondensibles · · · Recover Charge, Evacuate, RechargeRecirculation of Condensing Air · · · Remove Obstruction to Air FlowInfiltration of Outdoor Air · · · Check Windows, Doors, Vent Fans, Etc.Improperly Located Thermostat · Relocate ThermostatAir Flow Unbalanced · · Readjust Air Volume DampersSystem Undersized · · Refigure Cooling LoadBroken Internal Parts · Replace CompressorBroken Valves · Test Compressor EfficiencyInefficient Compressor · · · Test Compressor EfficiencyHigh Pressure Control Open · Reset and Test ControlUnbalanced Power, 3PH · · · Test VoltageWrong Type Expansion Valve · · · Replace ValveExpansion Valve Restricted · · · · · · Replace ValveOversized Expansion Valve · · Replace ValveUndersized Expansion Valve · · · · · Replace ValveExpansion Valve Bulb Loose · · Tighten Bulb BracketInoperative Expansion Valve · · · Check Valve OperationLoose Hold-down Bolts · Tighten BoltsCOOLING ANALYSIS CHARTNo Cooling System OperatingPressuresFor detailed service information refer to Remote Condensing Unit service manual.