Avaya Definity SI Maintenance Manual page 1177

CARR-POW (Carrier Port Power Unit) for DC-Powered
Systems
Table 10-144. TEST #127 Power Unit Query Test — Continued
Error
Code
555-233-123
Test
Result
FAIL 3. Unplug both port carrier power units, and wait about
1-minute to allow the port carrier power units to cool
(cont'd.)
down. Plug in the port carrier power units. If either port
carrier power unit is operating properly (that is, the status
LEDs show green), then replace the defective port carrier
power unit(s). See "Port Carrier Power Unit Replacement
Procedures" in this section.
4. If the replaced port carrier power unit(s) still does (do) not
operate properly, then a circuit pack or a defective
telephone connected to a circuit pack in the affected
carrier could be causing an electrical load which is
preventing the port carrier 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 port carrier 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 port carrier 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.
Description/Recommendation
Continued on next page
Issue 4 May 2002 10-391