Replacing a WS5000 Power Supply

The WS5000 has two hot-swappable redundant power supplies. If a single power supply fails, the redundant feature allows the other module to take over the full load, and the system runs without interruption. The failed power supply can be removed and a replacement power supply installed without removing the WS5000 from the rack, powering down, or exiting the WS5000's administrative web interface.

Hardware Configuration

On the WS5000, the two power supplies are located on the left side of the rear of the appliance.

In normal operation, the "Power Indicator" LED on the front panel is green , as are the "Power Supply Status" LEDs on the back of the WS5000 for each power supply , which are shown in the graphics below.




Failure Identification

Case 1: If either of the two power supplies completely fails, the "Power Indicator" LED on the front panel turns yellow, and an alarm sounds until the power supply is replaced. On the back of the unit, the "Power Supply Status" LED for the unit that has failed is either off or yellow. This is the power supply to replace.

Case 2: If either of the two power supplies partially fails, the "Power Indicator" LED on the front panel is green and no alarm sounds. On the back of the unit, the "Power Supply Status" LED for the unit that has partially failed is yellow. This is the power supply to replace.

Static-Sensitive Devices

CAUTION

Electrostatic discharge (ESD) can damage electronic components. To prevent damage to any printed circuit boards, it is important to handle them very carefully. The following measures are generally sufficient to protect your equipment from ESD damage.

  • Be sure that the appliance chassis is properly grounded through the AC power cord or enclosure frame.
  • Touch a grounded metal object before removing the power supply from the anti-static bag.
  • Put on the grounding wrist strap, handle the power supply by its edges only, and do not touch components on the bottom.

Single Power Supply Replacement

  1. Ensure that the power cord is unplugged from the failed power supply module. Then, while holding onto the handle, press the red locking tab on the bottom right of the power supply in toward the handle. This will disengage the power supply.

  2. Pull the power supply module straight out. Check to make sure that the replacement power supply module is the same type as the one previously removed.

  3. Carefully push the replacement power supply module straight into the appliance until you hear the release tab click into place.

  4. Plug the AC power cord back into the new power supply module. The "Power Supply Status" LED on the new module should now be green.