GE Industrial Solutions Millennium II Controller J85501P-1 - Manual (Page 104)

Basic Installation and User’s Guide for the Millennium II Controller
Issue 3 January 2008 104
7 Troubleshooting
Controller Circuit Pack
After power up, or after a reset, the multicolor LED (Located to the right of the MCR2
board) will be RED while self diagnostics are in progress (which will take about 10
seconds). If all diagnostics pass, the red LED will change to green. If failures are detected
during diagnostics the LED will change to Amber. If a terminal is attached to the local
port during diagnostics, the diagnostic messages will show which test failed. During
normal operation if a failure occurs, the green LED will change to amber. When a failure
occurs, perform the following steps.
Step Action
1. Press the reset switch (System Reset, located to the right of the serial port
connector at the bottom of the MCR1 board). If all diagnostics pass, it is
possible that some type of “one time” abnormality occurred to cause the
failure, such as hot-insertion of option boards, shorting backplane pins when
installing optional equipment, etc. If the diagnostics did not pass, or if the
problem reoccurs, go to the next step.
2. Remove all optional circuit packs then again press the reset switch on the
MCR1 board. If the problem is not resolved, proceed to the next step. If all
diagnostics pass, install optional packs one at a time, verifying operation after
each.
3. Replace the MCR1/MCR2 boards and verify the failure is resolved before
installing and connecting any optional circuit packs.
Option Cards
The intelligent option boards (Modem, Gateway and data switch) are diagnosed by the
microprocessor. If problems are detected the option board’s amber LED is lit, otherwise
the green LED is lit. If the amber LED is lit, first reset the MCR1 board and see if the
problem clears. If the problem reoccurs, replace the option board.
Controller Alarm Descriptions
Table 7-A: Controller Alarm Descriptions
Alarm Description Explanation
ACO Active Alarm Cut-Off has been initiated to silence local audible
alarms. Any subsequent Power Critical, Power Major, or
Power Minor alarm disables ACO. A programmable ACO
time-out period for each alarm severity resets silenced
alarms.
Alarm Battery Supply Operated ABS fuse (F2) on Millennium II’s MCR1 card.