Danfoss TTS400 User Manual

12. VerifytheDCBusvoltagethroughthetestharness.RefertoSection4.21.2DCBusVoltageVerification
onpage167.
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IfDCBusvoltageiscorrect,proceedtoStep13
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IfDCBusvoltageisnotcorrect,verifytheSCRs
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IftheSCRspasstest,replacetheSoftStart,thenrepeatStep12
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IfoneormoreoftheSCRstestfaulty,replaceallthreeoftheSCRsthenrepeatStep12
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Ifthe15VACispresent,proceedtoStep14
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Ifthe15VACisnotpresent,replacetheSoftStartthenrepeatStep13
13. IsolatethecompressorpowerasdescribedinSection1.8ElectricalIsolationonpage22.
14. RemovetheDC-Bustestharnessandre-installtheJ2(250VDC)andJ3(24VDC)(PottedDC-DC)orJ4
(24VDC)(OpenFrameDC-DC)outputstotheDC-DCConverter.
15. Installthetopcovers.RefertoSection4.1CompressorCoversonpage52.
16. RemovetheServiceSideCover.RefertoSection4.1.3.1ServiceSideCoverRemovalandInstallationon
page54.andremovetheServiceSideCover.
17. Applycompressorpower.
18. Verifythe250VDCand24VDCtestpointsontheBackplane.
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Ifbothvoltagesarewithin+/-10%,allsupplyvoltagesaregood
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Ifeithervoltageisnotwithin+/-10%,proceedtoStep19
19. IsolatethecompressorpowerasdescribedintheSection1.8ElectricalIsolationonpage22.
20. WaitfortheLEDsontheBackplanetoturnoff.
21. RemoveallconnectorsfromtheBackplane,leavingonlytheJ6(Invertercable),J4(250VDC)andJ24
(24VDC)inputsconnected.
22. RemovetheSerialDriver,BMCC,andPWM.Refertothefollowingsections:
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4.26.4SerialDriverRemovalandInstallationonpage218
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4.27BMCConpage220
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4.28.4PWMRemovalandInstallationonpage228
23. Applycompressorpower.
24. VerifytheHV+andthe+24VDCtestpointsontheBackplane.
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Ifallvoltagesarewithin+/-10%,proceedtoStep27
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Ifeithervoltageisnotwithin+/-10%,isolatecompressorpowerandwaitfortheLED’sonthe
Backplanetogoout,thendisconnecttheJ4andJ24connectorsfromtheBackplane
25. Applycompressorpower.
26. Verifythe250VDCand24VDCattheJ4andJ24DC-DCConverteroutputconnectors.
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Ifeithervoltageisnotwithin+/-10%,replacetheDC-DCConverter
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Ifallvoltagesarewithin+/-10%,replacetheBackplane
27. Verifythe+17V,+15,+5and-15VDCtestpointsontheBackplane.
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Ifallvoltagesarewithin+/-10%,proceedtoStep28
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Ifanyvoltagesatthe+17V,+15,+5and-15VDCtestpointsarenotwithin+/-10%,replacethe
Backplane
28. IsolatethecompressorpowerasdescribedintheSection1.8ElectricalIsolationonpage22.
29. WaitfortheLEDsontheBackplanetoturnoff.
30. Installallconnectors.
31. InstallthePWM,BMCC,andSerialDrivertotheBackplane.Refertothefollowingsections:
Page 270 of 294 - M-SV-001-EN Rev. H 1/23/2023

Danfoss TTS400 Specifications

General

Brand	Danfoss
Model	TTS400
Category	Air Compressor
Language	English