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Fault analysis 55
Model 3095 mDSL DACS Getting Started Guide 5 • Troubleshooting and maintenance
Fault analysis
The following procedures outline steps you should follow when troubleshooting a Model 3095 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).
2. Refer to table 4 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 4. LED definitions
LED Location Color Status Meaning
POWER Front panel Green On solid Power is being applied. No action recommended.
Flashing Either one of the external power sources or one of the 3095's
power supplies has failed. The Model 3095 will function nor-
mally indefinitely with one power supply. To verify the suspected
problem, contact Patton Technical Support to determine whether
the DACS needs to be replaced or not.
Off No input power is being applied. Verify that power is being
supplied to the Model 3095.
CPU FAIL Front panel Red On solid CPU is unable to load the software from FLASH to RAM for oper-
ation. As soon as possible, unplug both power cables from the
Model 3095, wait 30 seconds, then plug the cables back into
the Mode 3095 to see if the problem disappears. If the CPU FAIL
LED remains lit after the Model 3095 completes the power-up
cycle, contact Patton Technical Support to determine whether the
DACS needs to be replaced or not.
Off The CPU is operating normally. No action recommended.
ALARM Front panel Red On solid A minor alarm condition has been detected.
Flashing A major alarm condition has been detected.
Off The Model 3095 is operating normally. No action recom-
mended.
SYSTEM Front panel Green Flashing The Model 3095 is operating normally. No action recom-
mended.
Off The Model 3095 is not functioning properly. As soon as possi-
ble, unplug both power cables from the Model 3095, wait 30
seconds, then plug the cables back into the Mode 3095 to see
if the problem disappears. If the SYSTEM LED remains lit after
the Model 3095 completes the power-up cycle, contact Patton
Technical Support to determine whether the DACS needs to be
replaced or not.