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12. IfaPottedDC-DCConverterisbeinginstalled,cleanthesurfaceoftheInverterHeatSinkPlateandthe

DC-DCConverter.TheOpen-FrameDC-DCConverterdoesnotrequireheatsinkpaste.

13. InstalltheDC-DCConverter.RefertoSection4.24.3DC-DCRemovalandInstallationonpage206.

14. InstalltheDCbusBarandCapacitorAssemblyandSnubberCapacitors.RefertoSection4.21.4.3DC

CapacitorBusBarAssemblyInstallation-TTS300/TGS230onpage174.

15. InstalltheTerminalblockandFuseassemblies.RefertoSection4.11.23-PhaseMainVoltageInput

TerminalBlockRemovalandInstallationonpage102.

16. InstallthemainsinputcablestotheTerminalBlockandtorqueto20Nm(15ft.lb.).ConnecttheSCR

GatecableharnesstotheSCRsnotingitsorientation.

17. ConnecttheSCRGatecableharnesstotheSCRsnotingitsorientation.

4.22.6.4 Compressor Specific Inverter Installation Steps - TTS/TGS/TTH/TGH (Except TTS300/TGS230)

1. CleantheO-ringgrooveinthemaincompressorhousingwithalint-freecloth.

2. ApplyO-lubeandinstalltheInverterO-ringinthecompressorhousinggroove.

3. RemovethebackingmaterialfromtheInverterCoolingManifoldofthenewInverter.Usecautionto

notdamagethebottomsealingsurfaceoftheInverter.

4. Installthe18M6x30fastenersintotheInverterassemblywiththeexceptionofthefour(4)M6x35SCR

Manifoldfastenersandcarefullylowertheassemblyontothecompressorhousing.Usetheinstalled

fastenerstoproperlylineuptheInverter.RefertoFigure4-209InverterFastenerLocations-

TTS/TGS/TGH(ExceptTTS300/TGS230)onpage187.

Figure 4-209 Inverter Fastener Locations - TTS/TGS/TGH (Except TTS300/TGS230)



5. OncetheInverterisinplace,finger-tightentheInverterfastenersinadiagonalpatternandtorqueto3

Nm(27in.lb.)onthefirstpass,thento7Nm(62in.lb.)onthesecondpass.

6. InstalltheSCRCoolingManifoldandSCRs.RefertoSection4.19.5SCRCoolingManifoldSpecific

InstallationSteps-TTS/TGS/TTH/TGH(ExceptTTS300/TGS230)onpage160.

7. Installthethree(3)CopperTubesandtorquetheM8x70fastenerstospecification.

8. InstalltheDC-DCConvertertotheInvertercoolingmanifold.RefertoSection4.24.3DC-DCRemoval

andInstallationonpage206.

9. Verifythecompressorcableharness(andtheSCRTemperatureSensorCable-ifapplicable)isproperly

placedacrossthecoolingmanifold.

M-SV-001-EN Rev. H-1/23/2023 Page 187 of 294

Danfoss TTS400 User Manual

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