Replacing an ES4000 Power Supply

The ES4000 has two hot-swap redundant power supplies. If either power supply fails, the redundant feature allows the other module to take over the full load, and the system runs without interruption.

The power supplies can be replaced without powering the system down or sliding the ES4000 out from the rack. In normal operation, the "Power Indicator" LED on the front panel is green, and the "Power Supply Status" LEDs on the back of the ES4000 are also green for each power supply.





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.

CAUTION
  • Be sure that the appliance is properly grounded to the chassis ground through the AC power cord or enclosure frame.
  • Touch a grounded metal object before removing the power supply module from the antistatic bag.
  • Make sure to replace with the same type of power supply.

Single Power Supply Replacement

To replace a failed power supply:

  1. Unplug the power cord from the failed power supply module.


  2. Depress the red locking tab on the top left of the power supply while holding down the rounded handle.


  3. 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.


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


  5. 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.