![background image](http://html1.mh-extra.com/html/danfoss/turbocor-tt-series/turbocor-tt-series_service-manual_4104524031.webp)
4. Route the cables through the cable passage beside the DC-DC Converter, down into the service side.
Refer to Figure 1-16 Cable Passage on page 28.
NOTE
When checks are complete, disconnect and remove the test harness.
5. Reinstall the Top Cover and Mains Input Cover. Refer to 4.1 Compressor Covers on page 52.
6. Reapply AC power to the Compressor.
7. Insert the positive voltmeter lead into the DC (+) test harness lead, and the negative voltmeter lead
into the DC (-) test harness lead. Refer to Table 1-2 Expected DC Bus Voltage on page 29 for the
expected DC bus voltage. If the DC bus voltage is not present, or if it is outside the “Expected DC Bus
Voltage” range shown in Table 1-2 Expected DC Bus Voltage on page 29, verify proper incoming AC
input, verify SCR Gates, and verify SCR Diodes. If incoming AC power is correct, and the SCRs pass the
diode and gate tests, replace the Soft Start.
NOTE
There are no replaceable fuses present in the Open-Top Soft Start.
8. When finished, remove the DC Bus Test Harness. Refer to Section 1.10.4 General DC Bus Test Harness
1.10.4 General DC Bus Test Harness Removal
1. Isolate the compressor power as described in 1.8 Electrical Isolation.
• • • CAUTION • • •
Use your ESD wrist strap before touching the Soft Start Board or any electronic components.
2. Use an ESD strap and attach it the compressor housing while removing the Test Harness.
3. Continue to the appropriate section below based on the particular Soft Start.
1.10.5 DC Bus Test Harness Removal for Closed-Top Soft Starts
1. Remove the DC bus test harness from the cable passage.
2. Disconnect the two (2) plugs of the DC Bus Test Harness from the Soft Start.
3. Disconnect the two (2) plugs of the compressor cable harness from the corresponding sockets of the
DC Bus Test Harness.
4. Reconnect the J1 and J7 connectors into the Soft Start.
5. Remove ESD strap from the compressor and yourself.
6. Install all covers on the compressor. Refer to Section 4.1 Compressor Covers on page 52.
7. Return the compressor to normal operation.
1.10.6 DC Bus Test Harness Removal for Open-Top Soft Starts
1. Remove the DC Bus Test Harness from the cable passage.
2. Disconnect the plug of the DC Bus Test Harness from the Soft Start.
3. Disconnect the plug of the compressor cable harness from the socket of the DC Bus Test Harness.
4. Reconnect the compressor cable harness into the J8 connector on the Soft Start.
5. Remove ESD strap from the compressor and yourself.
M-SV-001-EN Rev. H-1/23/2023 Page 31 of 294
Содержание Turbocor TT Series
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