1269 User Manual
Maintenance 7-13
Table 7-1, Continuation Troubleshooting
PROBLEM
POSSIBLE CAUSES
WHAT TO DO
Voltage alarm condition.
•
Faulty VXI module
installed or voltage
fault occurred
•
VXI supply is out of
tolerance
•
Cycle power.
•
If fault persists remove installed VXI
modules until fault indication is
cleared.
•
Perform
Basic Functional Check
procedure from
Chapter
3.
•
For EMS equipped mainframe check
VXI supply voltage levels and that
alarm limits are valid. (See
Chapter
4
)
T
e
m
pe
ra
tu
re
al
ar
m
co
nd
iti
on
•
Module temperature
rise or max ambient
limit exceeded
or
Insufficient module
cooling air
•
Check
)
)
T
and
T
max
outputs at rear
panel (EMS option).
•
Check for restrictions to airflow at
mainframe intake and exhaust.
•
Check fan
TACH
outputs at rear
panel (EMS option).
•
Query EMS to check ambient
temperature, slot temperature rise,
and fan speed to verify values and
limits. Refer to
Chapter 4.
•
Clean mainframe module cooling fan
filter.
Airflow alarm condition
•
Fan speed tolerance
limit exceeded
•
Check fan
TACH
output at rear panel
•
Query EMS to check fan speed value
and to verify limits. Refer to
Chapter
4.
•
Check for restrictions to airflow at
mainframe intake and exhaust.
•
Clean mainframe module cooling fan
filter.
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