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