Power Failures

A PSU is faulty (the PSU has no power output and the health indicator is blinking red).

1. Check the PSU indicator and record alarms on the iBMC WebUI. For details, see Using Indicators to Locate Faults.
2. Check whether an "AC lost" alarm is generated.
   • If yes, check that the power cable is connected properly and that the PDU is supplying power properly.
   • If no, go to 3.
3. Replace the PSU with a spare PSU and check whether the fault is rectified.
   • If yes, no further action is required.
   • If no, go to 4.
4. Replace the PSU backplane or replace the mainboard if no PSU backplane is configured. Check whether the fault is rectified.
   • If yes, no further action is required.
   • If no, contact Huawei technical support.

1. Check whether the current configuration has sufficient power supplies.
   • If yes, services are not affected.
   • If no, contact Huawei technical support.
2. Replace the faulty PSU with a spare PSU. Do not install the faulty PSU into a server again.

A rack server is not connected to a power source (all indicators are off).

1. Check whether the external power supply to the rack server is normal.
   • If yes, go to 2.
   • If no, resolve this issue.
2. Replace the PSU with a normal one and check whether the fault is rectified.
   • If yes, no further action is required.
   • If no, go to 3.
3. Replace the mainboard and PSU backplane and check whether the fault is rectified.
   • If yes, no further action is required.
   • If no, contact Huawei technical support.

Follow the handling procedure to replace any faulty modules.

The chassis where a high-density server is located has no power.

1. Check whether the external power supply to the chassis is normal or whether a power overload has occurred.
2. Remove all management modules and fan modules, label them with the slot numbers, and check whether their power connectors are normal.
3. Remove all PSUs, install the PSUs back one at a time in ascending order by slot number (ensure that only one PSU is installed at the same time), and check whether the chassis can be connected to the power source. If the chassis cannot be connected to the power source no matter which PSU is installed, replace the chassis.
4. If the chassis cannot be connected to the power source after a PSU is installed, replace the PSU.
5. After verifying that the chassis and PSUs can be connected to the power source, install only one PSU. Then install the fan modules and management modules one at a time in ascending order by slot number, and check whether the module can be connected to the power source.
6. After the fault is rectified, install the fan modules and management modules back into their original slots.

Follow the handling procedure to replace any faulty modules.

The chassis of a high-density server has power but a server node does not.

1. Remove the server node, and check whether its power connector is damaged.
   • If yes, replace the mainboard or chassis of the server node.
   • If no, go to 2.
2. Do not install the faulty server node into a server again. Install a spare component when available.

1. Remove the faulty server node. Check whether other server nodes work properly. (Do not install the node into a server again.)
   • If yes, services are not affected.
   • If no, contact Huawei technical support.
2. Follow the handling procedure to replace any faulty modules.