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AC-POWER
Issue 4 May 2002 10-7 555-233-123
AC Power for DC-Powered Systems
NOTE:
For environment maintenance, the PPN or EPN cabinet configuration
aspects in a High or Critical Reliability system are irrelevant.
1
(cont) FAIL
(cont) 2. Procedures for a Global MCC (J58890CH):
a. For a nominal holdover system if there is no AC power at
the wall outlet, then the problem is not with the system itself.
Power must be restored to the wall outlet.
b. If there is AC power at the wall outlet, then there could be a
problem with the Rectifiers (RM850), Battery Interface Unit,
or battery. Resolve all alarms logged against the POWER
Maintenance Object, and rerun the test. If the test still fails,
the BIU may be defective. Check to see if the BOD alarm
LED is “on”, on the BIU. If the BOD LED is “on” replace the
Battery Interface Unit (BIU). If the BOD LED is “off” and the
BOK LED is “on” then the SYSAM or the EPN Maintenance
circuit pack may be incorrectly reporting the problem.
Resolve all alarms against these Maintenance Objects and
rerun the test.
100 FAIL The switch is currently without AC power, and AC Power
maintenance is in the middle of timing the NPH interval.
1. Follow the repair steps outlined above for Error Code 1.
PASS The PR-MAINT (Maintenance/Tape Processor) in a PPN in a
system without High or Critical Reliability, the DUPINT (Duplication
Interface) circuit pack in a High or Critical Reliability system PPN, or
the EPN MAINT (Maintenance) circuit pack in an EPN multicarrier
cabinet system has reported that the switch has AC power. If there
is no AC power at the wall outlet, then look for and resolve all
alarms against the appropriate MO listed.
MO Name (in
Alarm Log)
Alarm
Level Initial Command to Run
1
1 Where P is an appropriate port network number determined via the PORT field from the
Alarm or Error Log.
Full Name of MO
AC-POWER WARNING test environment P AC Power
Table 10-2. TEST #78 AC Power Query Test — Continued
Error
Code
Test
Result Description / Recommendation
Continued on next page