AERMEC Variable Multi Flow ANL 580 - Faults and Remedies

24
18.03. 5719210_03
ANL / 290-650
EN
 
  
Unitdoesnotstart
• Lackofelectricalvoltage
• Checkelectricalvoltageispresent
• Checktheupstreamsafetydevicesprovidingpower
totheunit
• GeneralisolatorisOFF
• RemotecontactisOFF(ifpresent)
• ControlpanelisOFF
• MainisolatorisOFF
• CompressorcircuitbreakerisOFF
• PlaceinON
• Powersupplyvoltagetoolow • Checkpowersupply
• Compressorcontactorcoilfaulty
• Electronicboardfaulty
• Startingcapacitorfaulty
• Compressorfaulty
• Replacethecomponent
Lowcapacityoutput
• Lackofrefrigerantcharge
• Condensercoildirty
• Waterfilterclogged
• Unitlocation
• Operatingoutsideoflimits
• Checkchargeandforleaks
• Cleancondensercoil
• Cleanwaterfilter
• Checkperformance
• Checkagainstoperatinglimitcharts
Compressornoisy
• Liquidrefrigerantreturntocompressor
• Inadequatefixingdown
• Checkandcorrect
• Phasereversal • Reverseonephase(400V/3N/50Hzonly)
Noiseandvibrations
• Contactbetweenmetalcomponents • Checkandcorrect
• Weakbasesupport • Improvebasesupport
• Loosefixings • Tightenfixings
Compressorstopsonsafeties
• Dischargepressuretoohigh
• Suctionpressuretoolow
• Powersupplyvoltagetoolow
• Electricalconnectionsloose
• Operatingoutsideoflimits
• Checkagainstoperatinglimitschart
• Pressostatfaulty • Replacethecomponent
• Thermalcut-outoperates
• Checkvoltageandsettings
• Checkinsulationofwindings
Compressordischargepressurehigh
• Externalairtemperaturehigh
• Systemwaterinlettemperaturehigh
• Checkagainstoperatinglimitschart
• Insufficientairflow
• Insufficientwaterflow
• Check:
1. fanoperation
2. condensercoilclean
3. pumpoperation(andspeed)
4. waterfilterclean
• Faultyfancontrol • Checkandreplaceiffaulty
• Airinwatercircuit • Ventcircuit
• Refrigerantchargetoohigh • Checkchargeandadjust
Dischargepressurelow
• Externalairtemperaturelow
• Systemwaterinlettemperaturelow
• Checkagainstoperatinglimitschart
• Moistureinrefrigerantcircuit • Removechargeandreplace
• Airinwatercircuit • Ventcircuit
• Refrigerantchargetoolow • Checkchargeandadjust
Suctionpressurehigh
• Externalairtemperaturehigh
• Systemwaterinlettemperaturehigh
• Thermostaticexpansionvalvetooopenorfaulty
• Checkagainstoperatinglimitschart
• Adjustorreplaceiffaulty
Suctionpressurelow
• Systemwaterinlettemperaturelow
• Externalairtemperaturelow
• Thermostaticexpansionvalvefaultyorobstructed
• Checkagainstoperatinglimitschart
• Adjustorreplaceiffaulty
• Insufficientwaterflow
• Insufficientairflow
• Check:
1. fanoperation
2. condensercoilclean
3. pumpoperation(andspeed)
4. waterfilterclean