User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-279CARR-POW (Carrier Port Power Unit) for AC-Powered Systems
10
FAIL
(cont’d.)
4. If the replaced power unit still does not operate
properly, then a circuit pack or a defective
telephone connected to a circuit pack in the affected
carrier may be causing an electrical load which is
preventing the power unit from operating properly.
Unseat all the circuit packs in the carrier and reissue
the recycle carrier command.
a. If the recycle passes, then the power units are
healthy, and the problem is with one of the circuit
packs. Reinsert the circuit packs one at a time. If
the status LED shows red after reinserting a
circuit pack, replace the defective circuit pack. If
the status LED still shows red, remove the
Amphenol. connector on the back of the slot
containing this circuit pack and reissue the
recycle carrier command. If the status LED
shows green, the problem is with one of the
telephones or the wiring to one of the telephones
on this slot. If the status LED still shows red,
escalate the problem.
b. If either power unit still shows a red status LED,
check for bent pins and cable placement in the
affected carrier. There are failures that can occur
on the Maintenance/Tape Processor, Duplication
Interface, and EPN Maintenance circuit pack that
are not detected by the respective maintenance,
but that cause many, if not all, environment tests
to fail. If many environment tests are failing, the
suspect circuit pack, depending on the system
configuration, should be replaced and the test
rerun. If no other problems can be found,
escalate the problem.
Table 10-83. TEST #127 Power Unit Query Test — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page