TECHNICAL MANU AL CD 30÷520 06.06 M T E 0 11 2 5 6 ... - Chiller

Low dischargepressure(Heating)High suctionpressure(Heating)Low suctionpressure(Heating)Compressor stopby anti-freezeprotection(Cooling)Compressor stopby High-pressureprotectionCompressor stopby the overloadprotectionCompressorstops by the innerTemp sensor orhigh dischargeTemp protection.Low Temp of cooling waterRefrigerant leak or insufficientLow suction pressureHigh surrounding TempRefrigerant over-chargedRefrigerant insufficientAir flow insufficientShort cycle of air flowDefrosting insufficientChilled-water insufficientAir enter the water systemfailure of the heat-sensitiveresistanceHigh discharge pressureHigh-pressure switch failureHigh-pressure both of dischargeand suctionHigh or low voltage, single phase orunbalance of the phasesshort circuit of the motor orterminalsOver-load component failureHigh or low voltageHigh discharge pressure or lowsuction pressureComponents failureCD 30 ÷ 520Check the Temp of cooling waterLeak hunting or rechargingRefer to “low suction pressure” partMeasure the surrounding TempDischarge the additionalRechargingCheck the running direction of the fanFind the reason caused short cycle,then eliminate itfour-ways value or heat-sensitiveresistance failure, replace them ifnecessaryFailure of the water pump or waterflow switch, maintain or replace themif necessaryDischarge the airIf failure confirmed, replace it.Refer to “high discharge pressure”If failure confirmed, maintain orreplace it if necessaryRefer to “high discharge pressure” or“low suction pressure” parts.Check the voltage which shouldnever exceed or below 20V to therating.check the motor and thecorresponding resistance of theterminalsReplace itCheck the voltage which shouldnever exceed or below 20V to therating.Refer to “high discharge pressure”and “low suction pressure” parts.38