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D-18 A
PPENDIX
D: T
ROUBLESHOOTING
Power Supply Problems
Table D-5
Power Supply Problems
Problem Possible Causes Possible Solutions
Switch does not power up
■
Insufficient power supply to the Switch
■
System is not receiving power
■
Power supply malfunction
■
Blown fuse
■
If the Switch does not power-up correctly when the
ATM Module is installed, you may require a different
power supply. Refer to the Release Notes for
information about IBM power supplies.
■
Check that the power supply is plugged into the
device and power outlet.
■
Check that the main power supply switch on the wall
is set to the ON position.
■
Check, and if necessary change, the fuse. Refer to
the user guide that accompanies your Switch for
details about changing fuses and safety instructions.
■
Replace the power cable.
■
Contact IBM Technical Support.
Switch powers up but then
shuts itself down after a
few minutes
■
Insufficient power supply.
■
Wiring closet is too hot
■
Vents are blocked
■
System fans are not operating
■
If the Switch powered-up correctly before the ATM
Module was installed, there may be insufficient
power available to power the Switch under heavy
traffic conditions. Refer to the Release Notes.
■
Check that the room temperature does not exceed
50°C (122°F), and that the Switch is positioned
correctly so that it has adequate ventilation.
If the temperature exceeds the recommendations,
lower the thermostat and wait for the room to reach
the correct temperature range.
Restart the Switch. If the Switch turns itself off again,
contact IBM Technical Support.
Circuit breaker trips
■
External wiring problem
■
Power supply failure
■
Turn the Switch off.
Check with your local electricity supplier or company
electrician that there is not an external electricity
problem.
If you suspect the problem is caused by an IBM
device, contact IBM Technical Support.