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4.15 SCR DC Bus Bar - TTS300/TGS230

TheSCRDCBusBarspasstheDCvoltagefromtheoutputoftheSCRstotheDCCapacitorBusBarAssembly.This

proceduredoesnotshowtheremovaloftheSoftStartsinceitisnotrequired.However,ifextraroomisdesired,the

SoftStartcanberemovedtoprovidebetteraccesstothefastenersthatsecuretheSCRDCBusBarstotheDC

CapacitorBusBarAssembly.

Figure 4-115 SCR DC Bus Bars

4.15.1 SCR DC Bus Bar Removal and Installation



4.15.1.1 SCR DC Bus Bar Removal - TTS300/TGS230

1. IsolatethecompressorpowerasdescribedinSection1.8ElectricalIsolationonpage22.

2. Usinga10mmwrench/socket,removetheboltsthatsecurethe(+)and(-)SCRDCBusBarstotheDC

CapacitorBusBars.RefertoFigure4-116SCRDCBusBarRemoval-TTS300/TGS230forthisandthe

nexttwo(2)steps.

3. Removethesix(6)M6x16fastenersthatsecurethe(+)and(-)SCRDCBusBarstotheSCRs.

4. RemovetheSCRDCBusBars.

Figure 4-116 SCR DC Bus Bar Removal - TTS300/TGS230

4.15.1.2 SCR DC Bus Bar Installation - TTS300/TGS230

1. PlacethenegativebusbarontheSCRs.ThenegativebusbarshouldbenexttotheSCRGatepins

(alignedwiththeholesidentifiedas#3ontheSCRs).RefertoFigure4-117SCRDCBusBartoSCR

Alignmentonpage127forthisandthefollowingstep.



Page 126 of 294 - M-SV-001-EN Rev. H 1/23/2023

Danfoss TTS300 User Manual

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