Danfoss TTS300

10. RemovetheBearingSensorCablesfromthefrontandrear9-pinfeedthroughs.
11. InspecttheBearingSensorCablesandassociatedconnectionsfordamage,debris,orcorrosion.
12. Cleanorreplaceasnecessary.
13. InstalltheBearingSensorCablestotheirrespectivelocations.
14. ApplyathincoatingofdielectricgreaseontheexterioroftheBearingSensorFeedthroughConnectors
wheretheBearingSensorCablescontactthefeedthroughs.

NOTE
DonotapplydielectricgreasedirectlytotheBearingSensorFeedthroughpins.
15. Re-installtheServiceSideCover.RefertoSection4.1.3.1ServiceSideCoverRemovalandInstallationon
page54.
16. Re-applypowertothecompressor.
17. Repeatthecalibrationandvalidationprocedures,Steps2through6.
18. Ifthecalibrationand/orvalidationresultsimprove,thebearingcontrolloopisfunctioningnormally.
ContinuetoStep21.
19. Ifcalibrationand/orvalidationresultscontinuetoshowanissue,replacetheBearingSensorCables,
thenverifyothercomponentsinthebearingcontrolloopasinstructedintheServiceManual.
20. RepeatthevalidationprocessinSteps2through6toensureproperfunctionality.
21. Returnthecompressortonormaloperation.
4.30.4 Bearing Sensor Cable Removal and Installation
RefertoFigure4-238BackplaneConnectionsonpage212forconnectorlocationsinthissection.
Bearing Sensor Cable Removal:
1. Isolatecompressorpower.
2. RemovetheServiceSideCover.RefertoSection4.1.3.1ServiceSideCoverRemovalandInstallationon
page54.
3. WaitfortheLEDsontheBackplanetoturnoff.
4. FortheFrontBearingSensorCable,refertoSteps4and5;fortheRearBearingSensorCable,referto
Steps6through8.
5. RemovethecablefromJ10ontheBackplanebyspreadingtheclipsoutandawayfromthecable
connector.
6. Removethecablefromthe9-pinconnectorattheFrontBearingSensorFeedthroughbyremovingthe
two(2)retainingscrewsthatsecuretheconnectortotheBearingSensorFeedthrough.
7. RemovethecablefromJ9ontheBackplanebyspreadingtheclipsoutandawayfromthecable
connector.
8. Removethecablefromthe9-pinconnectorattheRearBearingSensorFeedthroughbyremovingthe
two(2)retainingscrewsthatsecuretheconnectortotheBearingSensorFeedthrough.
9. RemovethegroundwirefromJ11ontheBackplane.
NOTE
ThegroundwiremaybeinstalledoneitherJ11orJ12.

10. Pullthecablefromthefeedthrough.

Page 238 of 294 - M-SV-001-EN Rev. H 1/23/2023