Lucent Technologies -48V CPS4000/CPS4000 PLUS Cabinet Power System
7 - 16 Alarms, Controls, and Displays Issue 13 December 2000
Self-Diagnostics Routine
ES646, ES646B,
ES648 MCUs
For plants equipped with the ES646, ES646B, or ES648 MCU, a series
of self diagnostics can be performed. Depressing the LED Test button
on the MCU faceplate for more than 6 seconds will initiate the
self-diagnostic routine in which the PMJ, PMN, ACF, 2ACF/LV, Aux
PMN, Aux PMJ, MJF, and BD alarms are tested as well as the analog
signals that are proportional to the plant current. If SW1-6 on the MCU
circuit pack is closed, then the test alarms are not sent to the office alarm
connector. If SW1-6 is open, the test alarms are sent to the office
connector.
Test Failure Codes Test failures are momentarily set to the MCU’s LCD display as follows:
In addition to these self-diagnostics, the rectifier voltage adjust signal is
monitored continuously. If the actual voltage is not within 10% (I/V) of
the proportional value, the voltage adjust signal is disconnected from the
rectifiers and a PMN is issued.
Code Failure
188.0
2 RFA
188.1
2 CFA/Ringer
188.2
2 ACF
188.3
BD
188.4
Batt PMJ
188.5
Batt PMN
188.6
MJF
188.7
Remote voltage proportional to the plant current
Note
This test reports on the integrity of the alarm unit only. It does not
verify system faults reported by the alarm unit.
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