110 of 132
M-SV-001-EN Rev.E
• If the SCRs pass test, replace the Soft Start then
repeat Step 13.
• If one or more of the SCRs test faulty, replace all
three of the SCRs then repeat Step 12.
13. Verify the 15VAC through the test harness.
• If the 15VAC is present, proceed to Step 14.
• If the 15VAC is not present, replace the Soft Start
then repeat Step 13.
14. Isolate the compressor power as described
in the “Electrical Isolation of the Compressor”
section of this manual.
15. Remove the DC-Bus test harness and re-install
the J2 (250VDC) and J3 (24VDC) outputs to the
DC-DC Converter.
16. Re-install the top covers and remove the
Service Side Cover.
17. Re-apply compressor power.
18. Verify the 250VDC and 24VDC test points on
the Backplane.
• If both voltages are /- 10%, all supply
voltages are good.
• If either voltage is not /- 10%, proceed
to Step 19.
19. Isolate the compressor power and wait for the
LEDs on the Backplane to go out.
20. Remove all connectors from the Backplane,
leaving only the J6 (Inverter cable), J4 (250VDC)
and J24 (24VDC) inputs connected.
21. Remove the Serial Driver (see Section 3.11.4.1)
, BMCC (see Section 3.14.4.1) and PWM (see
Section 3.16.4.1).
22. Re-apply compressor power.
23. Verify the HV+ and the +24 VDC test points on
the Backplane.
• If all voltages are /- 10%, proceed to
Step 26.
• If either voltage is not /- 10%, isolate
compressor power and wait for the LED’s on the
Backplane to go out, then disconnect the J4 and
J24 connectors from the Backplane.
24. Re-apply compressor power.
25. Verify the 250VDC and 24VDC at the J4 and
J24 DC/DC Converter output connectors.
• If either voltage is not /- 10%, replace
the DC/DC Converter.
• If all voltages are /-10%, replace the
Backplane.
26. Verify the +17V, +15, +5 and -15 VDC test
points on the Backplane.
• If all voltages are /- 10%, proceed to
Step 27.
• If any voltages at the +17V, +15, +5 and -15 VDC
test points are not /- 10%, replace the
Backplane.
27. Isolate the compressor power and wait for the
LEDs on the Backplane to turn off, then re-install
all connectors and the PWM (see Section 3.16.4.2)
, BMCC (see Section 3.14.4.2) and Serial Driver
(see Section 3.11.4.2) to the Backplane.
28. Re-apply the compressor power.
29. Verify the +17V, +15, +5 and -15 VDC test
points on the Backplane.
• If all voltages are /- 10%, all supply
voltages are good.
• If any of these voltages are not /- 10%,
see Section 4.5.2.
Troubleshooting
Содержание Turbocor TT-300
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