Fault analysis – Patton electronic 2996 User Manual
Page 53
Fault analysis
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Model 2960/2996 RAS User Manual
5 • Troubleshooting and maintenance
Fault analysis
The following procedures outline steps you should follow when troubleshooting a RAS malfunction.
1. If possible, talk to the person who filed the trouble complaint and determine the operational symptoms.
Record the symptoms on the appropriate trouble report form (include the front panel LED indications).
for LED definitions and compare the recorded results from the trouble report against those
in the table, then refer to the section recommended in the table for the maintenance procedure that will
repair the malfunction.
Table 5. LED definitions
LED
Location
Color
Status
Meaning
POWER
Front panel
Green
On solid Power is being applied. No action recommended.
Flashing A power supply has failed. One of the power supplies
has malfunctioned. The RAS will function normally indefi-
nitely with one power supply, so you can wait until a low
traffic time, then refer to
page 55 to replace the RAS.
Off
No input power is being applied. Verify that power is
being supplied to the RAS.
CPU FAIL
Front panel
Red
On solid The CPU has failed. As soon as possible, unplug
both power cables from the RAS, wait 30 seconds,
then plug the cables back into the RAS to see if the
problem disappears. If the CPU FAIL LED is still lit
after the RAS completes the power-up cycle, refer
to
on page 55 to replace the
RAS.
Off
The CPU is operating normally. No action recom-
mended.
ALARM
Front panel
Red
On solid A minor alarm condition has been detected.
Flashing A major alarm condition has been detected.
Off
The RAS is operating normally. No action recom-
mended.
SYSTEM
Front panel
Green Flashing The RAS is operating normally. No action recom-
mended.
Off
The RAS has malfunctioned. The RAS is not func-
tioning properly. As soon as possible, unplug both
power cables from the RAS, wait 30 seconds, then
plug the cables back into the RAS to see if the
problem disappears. If the SYSTEM LED is still not
lit after the RAS completes the power-up cycle,
refer to
on page 55 to
replace the RAS.