Replacing a Power Module

Impact on the System

During the replacement of a power module, if the redundant power module fails, the corresponding controller is powered by a BBU and the system reliability degrades.

Prerequisite

• A replacement power module is ready.
• The power module that you want to replace has been located.

You can locate a component in either of the following ways:

• Locating a component based on alarms in DeviceManager: On the Alarms and Events page of DeviceManager, view the help information and determine the ID of the component to be replaced. Then locate the component at your site based on its ID.
• Locating a component based on the status of its Running/Alarm indicator: For details about the indicators on different components, see Indicator Introduction of each component in the Product Description specific to your product model and version.

• The power cable has been disconnected from the power module that you want to replace.
• The other power modules work properly.

Precaution

• Do not touch the connectors of a power module and a power cable.
• Remove and insert a power module with even force. Excessive force may damage the appearance or connectors of the power module.
• Remove only one power module at a time.
• A power module must be replaced within five minutes. Otherwise, the system heat dissipation is compromised.

Tools and Materials

• ESD wrist strap
• ESD bag
• Labels
• Phillips screwdriver

Procedure

1. Check status before replacement.
   1. Check system status.

      Start SmartKit and choose Routine Maintenance > Health Check. On the Health Check page, perform inspection as instructed. For details, see Checking System Status.

      If any items fail the inspection, rectify the faults by performing the recommended actions in the inspection reports. Ensure that all other parts except the parts to be replaced are working properly.

   2. Check the status of the parts to be replaced.

      Start SmartKit and choose Parts Replacement > Parts Replacement. On the Parts Replacement page, click FRU Replacement. Then complete the check before the replacement as prompted. For details, see Replacing an FRU.

      You can proceed to next steps only when all items pass the pre-replacement check and the replacement page is displayed. If any item fails, rectify the fault as prompted.

2. Wear an ESD wrist strap.
3. Press the latch on the inner side of the power module handle and pull out the power module, as shown in Figure 5-22.

   The procedure for removing a DC power module is the same as that for removing an AC power module. This step uses the AC power module as an example.

   Figure 5-22 Removing an AC power module
   

4. Put the removed power module into an ESD bag.
5. Take the spare part out of its ESD bag.
6. Insert the replacement power module into the empty slot until it clicks into place, as shown in Figure 5-23.

   The procedure for installing a DC power module is the same as that for installing an AC power module. This step uses the AC power module as an example.

   Figure 5-23 Installing an AC power module
   

7. Wait about one minute and check the status of the Running/Alarm indicator on the power module to determine whether the power module has been successfully installed. Figure 5-24 shows the location of the Running/Alarm indicator.
   • If the indicator is steady green, the power module has been successfully installed.
   • If the indicator is blinking green, the power module is incorrectly installed.
   • If the indicator is steady red or off, the newly installed power module is faulty or the power module slot is faulty.
   Figure 5-24 Running/Alarm indicator on a power module
   

8. Confirm the replacement.
   1. Perform a post-replacement inspection.

      After the parts replacement, return to the SmartKit page and click Replaced. Then complete the parts check after the replacement as prompted.

   2. Check system status.

      On the Parts Replacement page, click Inspection to check the system status again. If any item fails inspection, rectify the fault based on the suggestions in the inspection report.

   3. After the preceding procedure is complete, check services on the host for storage-related errors.

Follow-up Procedure

After the power module is replaced, label it to facilitate subsequent operations.