Fan(s) Not Working/Overheating
The fans can be disabled at low temperatures to allow the unit to quickly attain operational temperature. In the event of
overheating
problems, refer to the following table.
NOTE :
Failure to ensure a free air flow around the unit may cause overheating. This condition is detected by a temperature
sensor on the Host Card which may be used to trigger an automatic alarm.
Log Files
Overview
The unit stores a log of events such as power-on, alarm assertion and de-assertion etc. Every event in the log has a
UTC
time and
date stamp attached to it to a resolution of 1 second.
Log Operation
The event log is stored on the Host Controller Card (HCC). A log file is generated with a file format as defined by RFC3164. Once the
log has filled the space allocated to it, the oldest entries in the log file are over-written.
Events that are logged include power-on, power on self test (POST) results, warning and alarm assertions and de-assertions, user
log ins and log outs. Each event has a UTC time and date stamp appended to it, with a time resolution of one second.
The various system log files are accessible from the web pages. The system log can be exported as a comma separated list, so that
it is easy to import it in to a spreadsheet, where it can be easily filtered or sorted.
1
Is the unit still working but the
LED/LCD display inactive?
the LED/LCD Display itself is probably at
fault. Call a Service Engineer.
Proceed to next step.
2
Check Power Source. Connect a
known, working piece of
equipment to the power source
outlet. Does it work?
The problem lies within the unit or power
cable. Proceed to next step.
The problem lies with the power
source. Check building circuit breakers,
fuse boxes, etc. If problem persists,
contact the electricity supplier.
3
Check Power Cable and Fuse.
Unplug the power connector
from the unit and try it in
another piece of equipment.
Does it work?
The problem lies within the unit. Proceed
to next step.
The problem lies with either the cable
itself, or with the fuse in the plug.
Replace the fuse or try to substitute
another cable.
4
Check PSU Module and Fuse.
Ensure the power connector is
unplugged. Remove the fuse
from the rear panel connector
and inspect it. Has the fuse
blown?
Replace the fuse with one of the correct
type and rating (see Technical
Specification >
Power Supplies
). If the
PSU still does not work, unplug the power
cable and call a Service Engineer.
Possible problem with the PSU module.
Call a Service Engineer.
Step
Action
If Result of Action is Yes…
If Result of Action is No…
1
Check Fan Rotation.
Inspect the fans located at the sides
of the enclosure. Are the fans
rotating? Check Base Board
temperature and fan (see
nCompass information).
Check that the unit has been
installed with sufficient space allowed
for air flow (see Installing the
Equipment > Mounting in a Rack >
Care in Positioning
). If the ambient
air is too hot, additional cooling may
be required.
Possible break in the dc supply
from the PSU module to the
suspect fan(s). Call a Service
Engineer.
© Ericsson AB 2011. All rights reserved
© Ericsson AB 2011. All rights reserved
Page 116 of 153
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