H3C Technologies H3C S10500 Series Switches - Manual (Page 55)

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7. Plug a new power module of the same model into the same slot, and connect it to the same power
input end. If the new power module can operate correctly, the old power module has failed. You
must replace the old power supply.
Fan failure
Both the MPU and the fan tray provide the fan tray LEDs, including an OK LED and a FAIL LED. When the
fan tray operates correctly, the OK LED is on, and the FAIL LED is off.
If the OK LED is off or the FAIL LED is on, the fan tray has failed. To troubleshoot the fan tray:
1. If both LEDs are off, verify that the power modules are operating correctly. For more information,
see "
Power supply system failure ."
2. Verify that the air intakes and exhaust vents of the chassis are not blocked. If they are blocked,
clean them to keep good ventilation. If you install air filters, remove the air filters, clean them, and
install them again.
3. Verify that the fan tray is fully seated. You can unplug the fan tray, plug it again, and then insert
and fasten the screws.
4. Verify that the empty LPU slots and power module slots are installed with filler panels. If not, install
filler panels for them to guarantee good ventilation.
5. If the failure persists, contact the local agents or technical support engineers.
MPU failure
The status LEDs on the MPU show the status of a card in the corresponding slot. According to the slot
number of an MPU, you can verify the corresponding LEDs for the MPU.
When the MPU operates correctly, the RUN LED flashes and the ALM LED is off. When the RUN LED is
off, the MPU fails. To troubleshoot the MPU:
1. Verify that the power module operates correctly. For more information, see " Power supply system
failure ."
2. Verify that the MPU is fully seated. You can unplug the MPU, plug it again, and make sure the MPU
is fully seated.
3. Press the RESET button of the MPU to reset the MPU. After the MPU is reset, verify whether the
corresponding RUN LED is on.
4. If the switch has empty MPU slots, plug the MPU into an empty MPU slot, and verify that the MPU
can operate correctly.
5. If the failure persists, contact the local agents or technical support engineers.
LPU and switching fabric module failure
Use the card status LEDs on the MPU to identify the failure of the LPU or switching fabric module in a
particular slot.
If a card is operating correctly, the RUN LED flashes and the ALM LED is off. When the RUN LED is off,
the card fails. To troubleshoot the card:
1. Verify that the MPU is operating correctly. For more information, see " MPU failure ."