Danfoss Turbocor TT Series

4.16 Soft Start SCR Gate Cable
Therearetwo(2)differentstylesofthiscable,onefortheClosed-TopSoftStartandonefortheOpen-TopSoftStart.
RefertoFigure4-118SoftStartSCRGateCable(Closed-TopSoftStarts)andFigure4-119SoftStartSCRGateCable
(Open-TopSoftStarts)fortheexamplesofeach.
ThefollowingstepsprovidedetailonhowtoreplacetheSoftStartSCRGateCable.Priortoremoval,notethe
locationoftheharnessroutingasthiswillminimizetheinstallationtimeofthenewharness.
4.16.1 Soft Start SCR Gate Cable Connections
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Figure 4-118 Soft Start SCR Gate Cable (Closed-Top Soft Starts)
Figure 4-119 Soft Start SCR Gate Cable (Open-Top Soft Starts)
4.16.2 Soft Start SCR Gate Cable Removal and Installation
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4.16.2.1 Soft Start SCR Gate Cable Removal
1. IsolatethecompressorpowerasdescribedinSection1.8ElectricalIsolationonpage22.
2. Removethesix(6)SoftStartSCRGateCableconnectorsfromtheSCRs.Thismayrequiretheuseof
needle-nosepliers.Refertothefollowingfiguresforthisandthenextstepfortheappropriate
compressormodel.
l
Figure4-120SoftStartSCRGateCableRemoval-TTS300/TGS230onpage129
l
Figure4-121SoftStartSCRGateCableRemovalatSCR-TTS/TGS/TTH/TGHModelsRev.Fand
Earlier(ExceptTTS300/TGS230)onpage129
l
Figure4-122SoftStartSCRGateCableRemovalatSCR-TTS/TGS/TTH/TGHModelsRev.H(Except
TTS300/TGS230)onpage129
3. RemovetheSCRGateCablefromtheSoftStart.
a. ForcompressorswiththeClosed-TopSoftStart,removetheJ8connector.
b. ForcompressorswiththeOpen-TopSoftStart,removetheJ2connector.
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Page 128 of 294 - M-SV-001-EN Rev. H 1/23/2023