On – No function.

Fast blinking – Switch is identifying itself.

Off – Disabled.

On – Fault detected.

Off – No faults detected.

On – Switch is functional without fault.

Off – Switch is off or initializing.

On – SP is ready.

Slow blinking – SP is booting up.

Off – SP is powered off, resetting, or at fault.

On – Link is up.

Intermittent flash – There is activity on the link.

Off – Link is down.

On – 12 VDC is supplied.

Off – No DC voltage is present.

On – Fault detected, 12 VDC shut down.

Off – No faults detected.

On – AC power present and good.

Off – AC power not present.

On – Fault detected,

Off – No faults detected.