Conversions: TAP-100
363-205-401
Page 2 of 4
Issue 7, March 1997
12. Is the FAIL LED on the suspect unit lighted?
If YES, continue with Step 13.
If NO, proceed to Step 14.
13. With the LED TEST button held, does the FAIL LED on the suspect unit go
off?
If YES, proceed to Step 24.
If NO, continue with Step 14.
14. Replace the suspect unit with another unit of the same type.
15. Did the FAIL LED on the suspect unit light momentarily and then go off?
If YES, STOP. YOU HAVE COMPLETED THIS PROCEDURE.
If NO, continue with Step 16.
16. Replace the unit with the unit removed previously.
17. Replace the BCU.
18. Did the FAIL LED on the suspect unit go off?
If YES, STOP. YOU HAVE COMPLETED THIS PROCEDURE.
If NO, continue with Step 19.
19. Replace the BCU with the BCU removed previously.
20. Replace the ADU.
21. Did the FAIL LED on the suspect unit go off?
If YES, STOP. YOU HAVE COMPLETED THIS PROCEDURE.
If NO, continue with Step 22.
22. Replace the ADU with the ADU removed previously.
23. Check the wiring using SD-7C117-01, SD-7C117-02, or SD-7C117-03. After
locating and correcting the wiring trouble, go back to the NTP and reinstall the
unit with the FAIL LED problem.
24. Release the LED TEST button. Is the CMP LED on the ADU lighted?
If YES, continue with Step 25.
If NO, proceed to Step 26.