Danfoss TTS400 User Manual

Compressor Status
Description
Trigger Method Troubleshooting
faults.
Recommendation:
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Ensuretheliquidmotor-coolinglinehassufficientliquidsupplyandisnotblocked.
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Preventprolongedoperationatapressureratiolessthan1.5.
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o
LowLiftoperationrequiresadditionalconsiderations,refertoApplications
Manual
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Verifythesolenoidsareoperationalandnotblocked.RefertoSection4.6.3Solenoid
Verificationonpage73.
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Verifythesolenoidactuators.RefertoSection4.6.3SolenoidVerificationonpage73.
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VerifytheSerialDriver.RefertoSection4.26.3SerialDriverVerificationonpage217.
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Verifycavitytemperaturesensor.RefertoSection4.31.3CavityTemperatureSensor
Verificationonpage242.
LowLeavingFluid
TemperatureFault
DFT
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(RemovedfromCC4.X.Xsoftware)
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Suggestsinsufficientevaporatorfluidfloworinsufficientsystemload.
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Checkevaporatorfluidflowandsystemload.
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Verifyleavingfluidtemperaturesensor.
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EnsureLEAVEjumperisinstalledontheI/Oboard.
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Reviewthefaultlogforenteringandleavingair/watertemperature(ifavailable)and
otherconditionsthatarerecordedatthetimeoffault.
HighPressureRatio
Fault
AFT
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Suggeststhecondenserressureishigh,notenoughloadontheevaporator,or
insufficientwater/airflowineithercondenserorevaporator.
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Checktheelectronicexpansionvalve(EXV)operation,condenser,evaporatorloads,and
water/airflow.
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Reviewthefaultlogforsuctionanddischargepressuresandotherconditionsthatare
recordedatthetimeoffault.
Bearing/MotorFault
Active
INS
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IfaMotorFaulttypeoraBearingFaulttypeispresent,theBearing/MotorFaultis
triggered.
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Thisisnotanactualfault,onlyanindicationthatafaulthasoccurredintheMotoror
Bearingsection.RefertoTable5-8Motor/SystemStatusonpage260andTable5-5
BearingFaultTypesonpage254.
SensorFault RFT
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Reviewfaultlogforindicationofvaluesoutofspecifiedrangesrecordedattimeoffault.
Verifythequestionablesensorandrelatedconnectionsforfailure.
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Invertertemperature:ThesensorembeddedintheInverterrequiresareplacementof
theInverterifdeterminedfaulty.
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CavityTemperature:RefertoSection4.31.3CavityTemperatureSensorVerificationon
page242.
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SuctionTemperature:Verifysuctionpressure/temperaturesensor.RefertoSection4.32.3
Pressure/TemperatureSensorVerificationonpage246.
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DischargeTemperature:Verifydischargepressure/temperaturesensor.RefertoSection
4.32.3Pressure/TemperatureSensorVerificationonpage246.
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LeavingWaterTemperature:VerifyLEAVEjumperisinstalledonI/Oboard.
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SuctionPressure:Reviewfaultlogforrecordedvalue.
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DischargePressure:Reviewfaultlogforrecordedvalue.
HighSCR
TemperatureFault
AFT RemovedfromCC4.2.Xandlatersoftware
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IndicatestheSCRcoolingisinsufficient.
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Ifthisfaultoccursthreetimeswithina30-minuteperiod,aLock-OutFaultwilloccur.
M-SV-001-EN Rev. H-1/23/2023 Page 257 of 294

Danfoss TTS400 Specifications

General

Brand	Danfoss
Model	TTS400
Category	Air Compressor
Language	English