TECHNICAL MANU AL CD 30÷520 06.06 M T E 0 11 2 5 6 ... - Chiller
TECHNICAL MANU AL CD 30÷520 06.06 M T E 0 11 2 5 6 ... - Chiller 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
CD 30 ÷ 520Compressor stopby thelow-pressureprotectionFilter jammed before (or after)electric expansion valveLow-pressure switch failureLow suction pressureCheck the inner Temp sensor, whenthe motor is coolReplace filterIf failure confirmed, replace it.Refer to “low suction pressure” part.Abnormal noisecause bycompressorOther abnormalnoiseCompressor can’tstartAirside heatexchangerover-frostedCompressor liquid pumping causedby the entrance of liquid refrigerant.Compressor agingPanel bolt loosedInsufficient strength of theinstallation foundation.Current relay open, burning thefuse.Open circuit of the control wireHigh or low-pressure protectionContactor wire burn outWrong phases sequenceWater system failureFailure code displayed by the linearcontroller.Four-ways value or heat-sensitiveresistance failure.Short cycle of the air flowAdjust the refrigerant volumeCheck expansion valve and suctiongas degree of superheat.Replace compressorFix all componentsRefer to “Unit installation ” partReplace the invalid componentsCheck the control system connectionRefer to the parts above about thefailures caused by suction anddischarge pressureReplace the invalid componentsExchange any two of three phaseswith each other.Check water systemConfirm the type of failure and takethe corresponding measure.Check the system, replace them ifnecessaryCheck the system; eliminate thefailure causing short cycle.39
- Page 1 and 2: R22A I R C O N D I T I O N I N GR40
- Page 3 and 4: CD 30 ÷ 520CONTENTSModular Air-coo
- Page 5 and 6: CD 30 ÷ 520Air-cooled heat-pump mo
- Page 7 and 8: CD 30 ÷ 5203. View (one module 65k
- Page 9 and 10: CD 30 ÷ 5205. SpecificationCooling
- Page 11 and 12: CD 30 ÷ 520CoolingModelCD65 130 19
- Page 13 and 14: CD 30 ÷ 5206.3 Pulse width modulat
- Page 15 and 16: CD 30 ÷ 5207. The capacity control
- Page 17 and 18: CD 30 ÷ 5207.1. Heating and coolin
- Page 19 and 20: CD 30 ÷ 5207.2. Cooling and heatin
- Page 21 and 22: CD 30 ÷ 5207.3 Principle of Digita
- Page 23 and 24: CD 30 ÷ 520 Matched RS485 communic
- Page 25 and 26: CD 30 ÷ 520• Installation founda
- Page 27 and 28: CD 30 ÷ 52011. WiringAll wiring in
- Page 29 and 30: CD 30 ÷ 52012. Debugging• Prepar
- Page 31 and 32: CD 30 ÷ 520 Please turn on the mai
- Page 33 and 34: CD 30 ÷ 52013. MaintenanceTo ensur
- Page 35 and 36: CD 30 ÷ 5202) Vacuum refrigerant p
- Page 37: CD 30 ÷ 52014. Troubles and soluti
- Page 41 and 42: CD 30 ÷ 52016. Electric control fi
- Page 43 and 44: 18. Unit electric control & communi
- Page 45 and 46: CD 30 ÷ 520Unit electric controlle
- Page 47 and 48: CD 30 ÷ 520systems. The correspond
- Page 49 and 50: CD 30 ÷ 52016——System A electr
- Page 51 and 52: CD 30 ÷ 5203. Failure & protection
- Page 53 and 54: CD 30 ÷ 5202. Pattern& buttons des
- Page 55 and 56: CD 30 ÷ 520number, etc. will be se
- Page 57 and 58: CD 30 ÷ 520H) The current setting
- Page 59 and 60: CD 30 ÷ 5207) Online units & runni
- Page 61 and 62: CD 30 ÷ 5207——Communication wi
- Page 63 and 64: CD 30 ÷ 52063
<strong>CD</strong> 30 ÷ 520Compressor stopby thelow-pressureprotectionFilter jammed before (or after)electric expansion valveLow-pressure switch failureLow suction pressureCheck the inner Temp sensor, whenthe motor is coolReplace filterIf failure confirmed, replace it.Refer to “low suction pressure” part.Abnormal noisecause bycompressorOther abnormalnoiseCompressor can’tstartAirside heatexchangerover-frostedCompressor liquid pumping causedby the entrance of liquid refrigerant.Compressor agingPanel bolt loosedInsufficient strength of theinstallation foundation.Current relay open, burning thefuse.Open circuit of the control wireHigh or low-pressure protectionContactor wire burn outWrong phases sequenceWater system failureFailure code displayed by the linearcontroller.Four-ways value or heat-sensitiveresistance failure.Short cycle of the air flowAdjust the refrigerant volumeCheck expansion valve and suctiongas degree of superheat.Replace compressorFix all componentsRefer to “Unit installation ” partReplace the invalid componentsCheck the control system connectionRefer to the parts above about thefailures caused by suction anddischarge pressureReplace the invalid componentsExchange any two of three phaseswith each other.Check water systemConfirm the type of failure and takethe corresponding measure.Check the system, replace them ifnecessaryCheck the system; eliminate thefailure causing short cycle.39
Change language