4. Troubleshooting
4-2
March 2001
8820-A2-GN20-30
LEDs
Type
LED
LED is . . . Indicating . . .
Mounting
–48V Power A
Green
Off
Normal operation for Power Source A.
Low or no voltage for Power Source A.
–48V Power B
Green
Off
Normal operation for Power Source B.
Low or no voltage for Power Source B.
Fan System
Alarm
Yellow
Off
Fan failure or a single fan in the Fan Module
is working at less than 50% of its normal
output.
Normal operation or no power.
Major Alarm
Yellow
Off
Major alarm present on any of the cards in
the chassis.
The card with alarm conditions will also
have its Alarm LED lit.
No major alarms.
Minor Alarm
Yellow
Off
Minor alarm present on any of the cards (or
Power Alarm problem) in the chassis.
The card with alarm conditions will also
have its Alarm LED lit.
No minor alarms.