KL1508 / KL1516 User Manual
Firmware Upgrade Recovery
There are basically four conditions that call for firmware upgrade recovery:
When the unit’s firmware becomes corrupted for some reason and you are unable to operate it.
When you invoke Firmware Upgrade Mode (see FIRMWARE UPGRADE, page 39), but decide not to proceed with the upgrade.
When a firmware upgrade procedure is interrupted.
When a firmware upgrade procedure fails.
To perform a firmware upgrade recovery, do the following:
1.Slide the Firmware Upgrade Recovery Switch (see page 9) to the Recover position.
2.Power off and restart the switch according to the instructions given in the Powering Off and Restarting section (see page 28).
3.Slide the Firmware Upgrade Recovery Switch back to the Normal position.
4.Repeat Step 2.
Note: If one of the child units fails to upgrade successfully, unchain it from the installation and perform the recovery and upgrade operation on it independently. After it has been successfully upgraded, plug it back into the chain
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