Danfoss Turbocor TT Series

Compressor Status
Description
Trigger Method Troubleshooting
l
Reviewthefaultlogforactualsuctionpressureandtemperature,enteringair/water
temperature(ifavailable)andotherconditionsthatarerecordedatthetimeoffault.
l
Verifysuctionpressure/temperaturesensor.RefertoSection4.32.3
Pressure/TemperatureSensorVerificationonpage246.

Table 5-7 Compressor Status 2 Faults
Compressor Status 2
Description
Trigger
Method
Troubleshooting
SuctionPressure
SensorFault
RFT
l
Sensorerrorsoccurwhenthesensorisprovidingareadingthatisoutsidethenormalreadable
temperaturerangeandthereforemusthaveanerrorinthereadingorfunctionalproblemwiththe
sensor
l
Verifytheassociatedsensorandrelatedconnections
Discharge
PressureSensor
Fault
RFT
l
Sensorerrorsoccurwhenthesensorisprovidingareadingthatisoutsidethenormalreadable
temperaturerangeandthereforemusthaveanerrorinthereadingorfunctionalproblemwiththe
sensor
l
Verifytheassociatedsensorandrelatedconnections
Suction
Temperature
SensorFault
RFT
l
Sensorerrorsoccurwhenthesensorisprovidingareadingthatisoutsidethenormalreadable
temperaturerangeandthereforemusthaveanerrorinthereadingorfunctionalproblemwiththe
sensor
l
Verifytheassociatedsensorandrelatedconnections
Discharge
Temperature
SensorFault
RFT
l
Sensorerrorsoccurwhenthesensorisprovidingareadingthatisoutsidethenormalreadable
temperaturerangeandthereforemusthaveanerrorinthereadingorfunctionalproblemwiththe
sensor
l
Verifytheassociatedsensorandrelatedconnections
Inverter
Temperature
SensorFault
RFT
l
Sensorerrorsoccurwhenthesensorisprovidingareadingthatisoutsidethenormalreadable
temperaturerangeandthereforemusthaveanerrorinthereadingorfunctionalproblemwiththe
sensor
l
Verifytheassociatedsensorandrelatedconnections
Cavity
Temperature
SensorFault
RFT
l
Sensorerrorsoccurwhenthesensorisprovidingareadingthatisoutsidethenormalreadable
temperaturerangeandthereforemusthaveanerrorinthereadingorfunctionalproblemwiththe
sensor.
l
Verifytheassociatedsensorandrelatedconnections
SoftStart
Temperature
SensorFault
RFT
l
Sensorerrorsoccurwhenthesensorisprovidingareadingthatisoutsidethenormalreadable
temperaturerangeandthereforemusthaveanerrorinthereadingorfunctionalproblemwiththe
sensor.
l
Verifytheassociatedsensorandrelatedconnections
InvalidBearing
CalibrationFault
INS
l
IfabearingcalibrationisnotsavedintheEEPROM,thisfaultwillbetriggered,avalidcalibrationis
requiredpriortothecompressoracceptingdemand.
l
CalibratethecompressorbearingsusingtheCalibrationToolandsavetoEEPROM.Cyclepowerand
verifythecalibrationisretainedinEEPROM.
InverterCooling
ControlFault
AFT
l
RefertoTable5-6CompressorStatusonpage255regardingHighInverterTemperatureFault
Troubleshooting
MotorCooling
ControlFault
AFT
l
RefertoTable5-6CompressorStatusonpage255regardingHighCavityTemperatureFault
Troubleshooting


M-SV-001-EN Rev. H-1/23/2023 Page 259 of 294