Symmetricom TimeHub 5500 User Manual

097-55501-01 Revision M – January 2009 TimeHub 5500 User’s Guide 227
Chapter 5 Maintaining the TimeHub 5500
Troubleshooting the TimeHub 5500
SHELF
POWER –48V
B Fail
Off The –48V B input is at the
normal voltage level.
None required.
Red The –48V B input is below the
normal voltage level.
Troubleshoot and repair the B
–48 V
battery input.
ALARMS
System Minor
Off There is no minor alarm
outside the shelf.
None required.
Red A minor alarm condition
exists outside the shelf.
Refer to the
TL1 Reference Guide
(see RTRV-ALM) to determine which
minor alarm occurred and the
recommended action.
ALARMS
System Major
Off There is no major alarm
outside the shelf.
None required.
Red A major alarm condition
exists outside the shelf.
Refer to the
TL1 Reference Guide
(see RTRV-ALM) to determine which
major alarm occurred and the
recommended action.
If a minor system alarm is also
present, it does not appear on the
front panel LEDs because only the
highest severity alarm of a group
(system or shelf) is illuminated. When
the major system alarm ends, the
minor system alarm LED then lights.
ALARMS
System Critical
Off There is no critical alarm
outside the shelf.
None required.
Red A critical alarm condition
exists outside the shelf.
Refer to the
TL1 Reference Guide
(see RTRV-ALM) to determine which
critical alarm occurred and the
recommended action.
If a major and/or minor system alarm
is present, it does not appear on the
front panel LEDs because only the
highest severity alarm of a group
(system or shelf) is illuminated. When
the critical system alarm ends, the
LED associated with the
highest-severity remaining system
alarm LED then lights.
Table 5-3. Management Card Front Panel Items (Continued)
Name State Description Action

Symmetricom TimeHub 5500 Specifications

General

Brand	Symmetricom
Model	TimeHub 5500
Category	Data Loggers
Language	English