All versions of the DC Bus Test Harness have male/female plugs to allow piggyback connection to the required
voltage measurement points on the Soft-Start. Refer to Figure 1-11 DC Bus Test Harness Diagram (Closed-Top Soft
Start) and Figure 1-12 DC Bus Test Harness Diagram (Open-Top Soft Start) on page 26. for an example of the two
current harnesses. Voltage measurements are made via shrouded multimeter jacks on the opposite end of the
cables. Cable and personal protection are provided by inline fast-acting fuses (1/4 x 1 1/4, 62 milliamp 250V) and
current-limiting 100kΩ 3W resistors.
Figure 1-11 DC Bus Test Harness Diagram (Closed-Top Soft Start)
Figure 1-12 DC Bus Test Harness Diagram (Open-Top Soft Start)
• • • CAUTION • • •
Before using the DC bus test harness, integrity of the fuses/resistors in the harness and cable must be checked.
1.10.1 General Verification and Installation of the DC Bus Test Harness
1. Isolate the compressor power as described in Section 1.8 Electrical Isolation on page 22.
• • • 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 installing the Test Harness.
3. Remove the Service Side Cover. Refer to Section 4.1.3.1 Service Side Cover Removal and Installation on
• • • CAUTION • • •
Use your ESD wrist strap before touching the Soft Start Board or any electronic components.
Page 26 of 294 - M-SV-001-EN Rev. H 1/23/2023
Summary of Contents for Turbocor TT Series
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