Danfoss TTS350 - DC Bus Voltage Verification; Bleed Resistor Verification; Snubber Capacitor Verification

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