Danfoss TTS300

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.
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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
l
Interlockmustbeopen
l
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.
l
SeethecurrentServiceMonitoringToolsUserManualforfurtherinstructionsonperforminga
calibrationandvalidation.
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Page 264 of 294 - M-SV-001-EN Rev. H 1/23/2023