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Figure 4-178 Soft Start Cable Harness to DC Bus

4.21.2 DC Bus Voltage Verification

UsetheDCBusTestHarnesstodetermineifDCbusvoltageiswithinthecorrectrangefortheapplication.Referto

Section1.10DCBusTestHarnessInstallationandRemovalonpage25.

4.21.2.1 Bleed Resistor Verification



NOTE

ThisverificationstepdoesnotapplyiftheDCCapacitorBusBarAssemblycontainstheBalanceBoard.



1. IsolatethecompressorpowerasdescribedinSection1.8ElectricalIsolationonpage22ofthismanual.

2. Disconnectthebleedresistorfromonesideofthecapacitor.

3. BendthebleedresistorbackslightlyuntilitnolongercontactstheDCbus.



• • • CAUTION • • •

AfaultybleedresistorcanbetheresultofafaultyDCcapacitor.

4. Usingamultimetersetforresistancemeasurement,placetheleadsoneachofthebleedresistor

terminals.Themeasuredvalueshouldbebetween24.3kΩand29.7kΩforTTS300/TGS230compressors

orbetween16.2kΩand19.8kΩforTTS350,TTS400,TTS450,TTS500,TTS700,TGS310,TGS380,TGS390,

TGS520,TTH375,andTGH375compressors.

4.21.2.2 Snubber Capacitor Verification

1. IsolatethecompressorpowerasdescribedinSection1.8ElectricalIsolationonpage22.

2. RemovetheSoftStart.RefertoSection4.14SoftStartonpage113.

M-SV-001-EN Rev. H-1/23/2023 Page 167 of 294

Danfoss TTS400 User Manual

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