12713020-002-2 Revision D – April 2004 SSU-2000 User’s Guide 245
Alarm Messages
Table A-2. Communications Module Alarm Messages
Alarm
Description
Alarm
Number
Default
Alarm
Level
Status
Messages
Description/
Corrective Action
Module-to-module
communication
0 Minor
Ok
Bad
Unable to communicate
with other modules.
Re-seat modules.
Indication of output
controller
mastership
1 Minor
Ok
Bad
Identifies master output
controller. No action
necessary.
Status of Power A 2 Minor
Ok
Lost
Verify that the fuse for
Power
A is properly
installed and not OPEN.
Verify that Power Bus A is
providing –48 vDC to the
unit. If no power is
connected to the Power A
input and there is no plan to
connect power, issue the
command AL 10-1 IG at
the prompt.
Status of Power B 3 Minor
Ok
Lost
Verify that the fuse for
Power
B is properly
installed and not OPEN.
Verify that Power Bus B
is providing –48 vDC to
the unit. If no power is
connected to the Power
B input and there is no
plan to connect power,
enter the command AL
10-1 IG at the prompt.
Status of module’s
serial peripheral
interface hardware
(SPI watchdog
timeout)
4 Minor
Ok
Timeout
Unable to communicate
with other modules.
Re-seat module.