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SCP-AMU912-010-06H
F
I
AULT
SOLATION AND
Table 37
provides fault isolation and troubleshooting procedures for the AMU-912.
LED
State
PWR
Off
Flashing
On
FAULT
On
Off
CRIT
On
MJ
MN
Off
ACO
On
Off
112
T
ROUBLESHOOTING
Table 37. Fault Isolation and Troubleshooting
Probable Cause
• No input power
• AMU-912 power fuse blown
• AMU-912 processor stopped
One of the two CO battery feeds is not
present
OK
Problem with the AMU-912
OK
Alarm on the shelf
OK
ACO function has been activated while
an alarm exists on the shelf
OK
Solution
• Verify fuses on bay fuse panel
• Check input power on the shelf battery
terminations
• Remove and re-insert AMU-912
• Replace the AMU-912
• Verify fuses on bay fuse panel
• Check input power on the shelf battery
terminations
• Remove and re-insert AMU-912
• From the Main Menu (Alarms
sub-menu), verify no alarms exist on the
AMU-912
• Replace the AMU-912
Replace the AMU-912
From the Main Menu (Alarms sub-menu),
view the alarms and clear the indicated
trouble
LED extinguishes when the alarm is
cleared
ADC Telecommunications, Inc.
July 19, 2004
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