Nortel Communication Server 1000E Maintenance Manual page 79

Table 23
Call Server faults (cont'd.)
Condition
Fan LED or
temperature LED
is red
The power LED is
red
Note: When in shutdown mode, the power supply continues to power the LEDs on the alarm/fan
module that indicate a power supply failure.
All LEDs in the Call
Server are off
WARNING
The following tests are performed on a live power connection.
Possible cause
High room temperature
Defective alarm/fan
module
Power supply air filter is
obstructed
Power fault or defective
power supply module
Power switch is off
Disconnected power
cable
Defective power cable
Nortel Communication Server 1000
Communication Server 1000E Maintenance
NN43041-700 04.01 4 June 2010
Copyright © 2004-2010 Nortel Networks. All Rights Reserved.
Clearing Core Call Server faults 79
Action
Adjust room temperature as necessary. Allow
the system to cool for a few minutes and then
reset the system.
Verify that the fans in the alarm fan/module are
operational.
Unseat and reinstall alarm/fan module. If the
fault continues, replace the alarm/fan module.
Check filter to ensure it is clean. If the filter is
dirty or damaged, clean or replace the filter
as described in Procedure 27 "Cleaning and
replacing the power supply air filter" (page
Turn off the power switch at the rear of the Call
Server and remove the power cord. Loosen
the locking screw at the front of the module.
Unseat and reseat the module firmly. Tighten
the locking screw and replace the power cord.
Turn on the power switch and observe if failure
has cleared.
If the fault continues, replace the power supply
module.
Turn the power switch on.
Check the power cable connection to the
power supply module. Ensure that it is firmly
connected.
If the cable is connected, check the power cable
connection to the other Call Server.
If all power cables are firmly connected, go to
the next possible cause.
Replace power cable.
141).