Carrier AQUASNAP 30RB060-390 Controls, Start-up, Operation, Service And Troubleshooting Instructions

Also see for AQUASNAP 30RBA315: Installation instructions

58Table 40 — TroubleshootingTable 41 — Alarm CodesSee legend on page 59.SYMPTOM POSSIBLE CAUSE POSSIBLE REMEDYUnit Does Not Run Check for power to unit • Check overcurrent protection device.• Check non-fused disconnect (if equipped).• Restore power to unit.Low refrigerant charge Check for leak and add refrigerant.Wrong or incorrect unit configuration Check unit configuration.Active alarm Check Alarm status. See separate Alarm and follow troubleshootinginstructions.Active operating mode Check for Operating Modes. See Operating Modes and follow trouble-shooting instructions. Check capacity control overrides.Unit Operates too Long orContinuouslyLow refrigerant charge Check for leak and add refrigerant.Compressor or control contacts welded Replace contactor or relay.Air in chilled water loop Purge water loop.Non-condensables in refrigerant circuit. Remove refrigerant and recharge.Inoperative EXV • Check EXV, clean or replace.• Check EXV cable, replace if necessary.• Check EXV board for output signal.Circuit Does Not Run Active alarm Check Alarm status. See separate Alarm and follow troubleshootinginstructions.Active operating mode Check for Operating Modes. See Operating Modes and follow trouble-shooting instructions.Circuit Does Not Load Active alarm Check Alarm status. See separate Alarm and follow troubleshootinginstructions.Active operating mode Check for Operating Modes. See Operating Modes and follow trouble-shooting instructions.Low saturated suction temperature See Operating Modes 21, 22 and 23.High circuit suction superheat The circuit capacity is not allowed increase if circuit superheat is greaterthan 36 F (20 C). See Alarms P.08, P.09 and P.10 for potential causes.Low suction superheat The circuit capacity is not allowed to increase if the circuit superheat isless than 5 F (2.8 C). See Alarms P.11, P.12 and P.13 for potential causes.Compressor Does Not Run Active alarm Check Alarm status. See separate Alarm and follow troubleshootinginstructions.Active operating mode Check for Operating Modes. See Operating Modes and follow trouble-shooting instructions.Inoperative compressor contactor • Check control wiring.• Check scroll protection module.• Check contactor operation, replace if necessary.Chilled Water Pump is ON,but the Machine is OFFCooler freeze protection Chilled water loop temperature too low. Check cooler heater.PREFIXCODESUFFIXCODE DESCRIPTION REASON FOR ALARM ACTION TAKENBY CONTROLRESETTYPE PROBABLE CAUSEA1A2A3A4B1B2B3B4C1C2C3C4.01 Compressor nn MotorTemperature Too HighCompressor MotorSensor PTC resistanceis greater than 4.5k Circuit shut downor not allowed tostartManualCompressor failure,wiring error, operationoutside of limits, improperrefrigerant charge.02 Compressor nn CrankcaseHeater FailureCrankcase heatercurrent not detectedwhen required ordetected when notrequired.Circuit shut downor not allowed tostart Manual Wiring error, failedcrankcase heater,failed SPM..03 Compressor nn High PressureSwitch High Pressure Switchopen.Circuit shut downor not allowed tostart ManualWiring error, closed/restricted dischargevalve, improperrefrigerant charge,dirty condenser coils,failed outdoor fan motor,discharge pressuretransducer inaccuracy.04 Compressor nn Motor SensorPTC Out of RangeCompressor MotorSensor PTC resistanceis less than 50 orgreater than 17k .Circuit shut downor not allowed tostart ManualWiring error, operationoutside of limits, com-pressor failure, improperrefrigerant charge.05 Compressor nn Power Reset 24-VAC power lost toSPM board.Compressor shutdown or notallowed to startAutomatic Low voltage from mainpower supply..06 Compressor nn Low ControlVoltage Alert24-VAC power to SPMboard too low.Compressor shutdown or notallowed to startAutomatic Low voltage from mainpower supply.