Verification; Figure 113 - Dc-Dc 250 Vdc Test Points (Revisions A And B); Figure 114 - Dc-Dc 250 Vdc Test Points (Revisions C And Later) - Danfoss Turbocor VTT Series Service Manual

3.7.1.11.2 Verification

Figure 113 - DC-DC 250 VDC
Test Points (Revisions A
and B)
Figure 114 - DC-DC 250 VDC
Test Points (Revisions C and
Later)
+ 250VDC
- 250 VDC
96 of 165
M-SV-VT-001-EN Rev. A
Compressor Components
5. Replace the Service Side Cover.
6. Route the cable into the DC-DC panel.
7. Connect the ground cable to the J6 connector on the DC-DC.
8. Insert the connector to J2 on the DC-DC Board.
9. Close the DC-DC panel.
10. Restore power to the Compressor.
Installation (Revisions C and Later):
1. Route the cable into the service side.
2. Insert the connector to J11 on the PWM Board.
3. Secure the cable where it enters the service side.
4. Replace the Service Side Cover.
5. Route the cable into the DC-DC panel.
6. Insert the connector to J2 on the DC-DC Board.
7. Close the DC-DC panel.
8. Restore power to the Compressor.
250V DC-DC - PWM Cable Verification
1. With power applied to the Compressor, using a DC voltage meter, verify the 250 VDC test points
on the DC-DC for correct voltage. Place the negative (-) test lead on -250 VDC and the positive
(+) test lead on +250 VDC.
J9: - 250VDC
J8: +250 VDC
2. Place the negative (-) test lead in the HV- test point and verify the following test points on the
PWM for correct voltages. Refer to Figure 116 (PWM Test Points).
• TP1: HV+ (should measure between 225 -275 VDC)
• TP3: 17V (should measure between 15.3 - 18.7 VDC)