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AR Router Troubleshooting Guide

This Product Documentation provides guidance for maintaining AR Enterprise Router, covering common information collection and fault diagnostic commands, typical fault troubleshooting guide, and troubleshooting.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Replace a Power Module

Replace a Power Module


If a power module of an AR2240, AR2240C, AR3260, or AR3670 router fails, replace the power module to ensure normal operations of the router.

If a router has two power modules installed, one of the power modules can be hot swapped. Pay attention to the following points during the hot swap:
  • The power switch of the power module must be in OFF position.
  • Do not power off the other power module.
  • Do not touch the other power module with your body or any tool to avoid electric shocks.
  • AC and DC power modules cannot be used together in the same router.
  • Before replacing a power module, turn off its power switch.
  • A power module can be hot swapped.
  • Vacant slots in the router must be covered with filler panels.

The procedures for replacing a power module in different routers are the same. The following procedure replaces an AC power module in an AR2240 router.


  • Phillips screwdriver
  • ESD wrist strap


  1. Confirm the power module that needs to be replaced.

    Before replacing a power module, determine in which cabinet and chassis the power module is installed, find the power module in the chassis, and attach a label on the panel of the power module.

  2. Wear an ESD wrist strap. Ensure that the ESD wrist strap is grounded and in a close contact with your wrist.
  3. Turn the power switch on the power module to the OFF position.
  4. Remove the power cable from the power module.

    The procedure for removing a power cable is opposite to the procedure for installing the power cable. For details, see Connecting the AC Power Cable.

  5. Remove the power module.
    1. Use a Phillips screwdriver to loosen the captive screws on the power module.
    2. Rotate the ejector levers outward to release the power cable from the slot.
    3. Gently pull the power module out of the slot along the guide rails.

  6. Install a new power module into the router. For details, see Installing a Power Module.
  7. Connect the power cable to the power module.
    • For details on how to connect the AC power cable, see Connecting the AC Power Cable.
    • For details on how to connect the DC power cables, see Connecting DC Power Cables.
  8. Turn the power switch on the power module to the ON position.
  9. Use either of the following methods to check whether the new power module works normally:

    • Check the indicator on the new power module. If the indicator is steady green, the power module is working normally.
    • Run the display device command to check the running status of the new power module.

Follow-up Procedure

After replacing the power module, collect all tools. If the replaced power module is faulty, fill in the Appendix G Fault Tag and send the faulty module with the Repair Transmission Sheet to the equipment supplier or the specified repair service provider.

Updated: 2019-05-10

Document ID: EDOC1000079719

Views: 444594

Downloads: 4297

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