0120011-J0 Rev J
62
7� Maintenance and Troubleshooting
Although very little maintenance is required with Alpha systems, routine checks and adjustments are recommended
to ensure optimum system performance. Qualified service personnel should do the repairs.
WARNING!
Use extreme care when working inside the unit while the system is energized. Do not
make contact with live components or parts.
Circuit cards, including RAM chips, can be damaged by static electricity. Always wear a
grounded wrist strap when handling or installing circuit cards.
Ensure redundant modules or batteries are used to eliminate the threat of service inter-
ruptions while performing maintenance on the system’s alarms and control settings.
The following table lists a few maintenance procedures for this system. These procedures should be performed at
least once a year.
Table E — Sample maintenance log
Procedure
Date Completed
Clean ventilation openings.
Inspect all system connections. Re-torque if necessary.
Verify alarm/control settings.
Verify alarm relay operation.
7�1 Troubleshooting Converter Status LEDs
7�1�1 Card Alarms (All 4 LEDs)
LED State
Individual Converter status
Action
Green
Normal
None
Blinking Green
Shelf is not compatible with the
module
Ensure that the shelf is correct. Note: Slots for the
e and LPS36 shelves are mechanically
identical and the modules can be interchanged.
Module not seated properly
Re-seat module
Yellow
Recoverable:
• Ambient temperature high
Resets automatically when ambient temperature
reduces to approximately 85°C or below.
Blinking Yellow
Input quality not OK
Output is disabled if input voltage is not within the
range of 40-60Vdc.
OFF
Recoverable:
• No power
Check input wiring.
Non-recoverable:
• Main input fuse cut-off
Potential component failure. Replace with new
module.
Chasing Red/Green
Pattern
Locate feature enabled
None
