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5.3.1.2 Regular Maintenance Calibration

Calibrationcanbeperformedduringregularmaintenancevisitsforthepurposeofcomparingthevaluesstoredin

EEPROMtothelatestcurrentcalibrationvaluestodeterminechangesovertime.Thereisnobenefittosavethe

calibrationtoEEPROMifthecompressorhasbeenoperatingnormally.

Acalibrationreportshouldalwaysbecreatedforfuturecomparison.

5.3.1.3 Calibration when Troubleshooting

TroubleshootingproceduresthatrequireabearingcalibrationtobeperformedwillneedtobesavedtoEEPROM.

Clickonthe“SavetoEEPROM”buttonevenifamessageindicatingvaluesareoutofrangeisdisplayed.Ensurethat

“Stored”valuesareupdatedtobeidenticalto“Latest”values.Cyclepowertothecompressorensuringthegreen

LEDontheI/Oboardturnsoff.Thismayneedtoberepeatedmultipletimes.Createacalibrationreportbeforeany

changeismadeandaftereachcalibration.Ensuretheshaftlevitatescorrectlybyclicking“Validate”aftercalibration

valueshavebeensavedtoEEPROM.

NOTE

Thecompressorperformsanautomaticstartupcheckbearingcalibrationafterapowercycle.



5.3.1.4 BMCC Change

IfareplacementBMCCisinstalledinacompressor,acalibrationmustbeperformed,savedtoEEPROM,and

repeatedtomatchtheBMCCtothespecificcompressor.

5.3.2 Performing a Calibration

OnceCalibrationisstarted,theSMTBearingCalibrationToolwillautomaticallychangetheCompressorControl

ModetoCalibrationModeandsendadelevitateshaftsignaltothebearingcontrol.Aftercalibrationiscomplete,the

SMTwillrevertbacktotheoriginalCompressorControlMode.Itisnecessarytoverifythecontrolmodeofthe

compressoraftercompletingthecalibrationprocess.

AmanualvalidationcanbeperformedbyclickingtheValidatebutton.Validationusesthestoredcalibrationvalues

tomomentarilylevitatetheshaftandcomparesthevaluestotolerancelimits.

5.3.2.1 Before Performing a Calibration

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Interlockmustbeopen

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RS485orotherexternalcompressorcommunicationconnectionmustbedisconnected

5.3.2.2 Calibration

1. OpentheSMTandconnecttothecompressor.

2. OpentheBearingCalibrationtool.TheBearingCalibrationtooldisplays.RefertoFigure5-2Bearing

CalibrationToolonpage265.

3. ClickontheStartCalibrationbutton.

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SeethecurrentServiceMonitoringToolsUserManualforfurtherinstructionsonperforminga

calibrationandvalidation.



Page 264 of 294 - M-SV-001-EN Rev. H 1/23/2023

Danfoss TTS300 User Manual

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