Item

Color

Name

Interpretation

 

 

 

 

 

 

 

Off = Controller is in an idle or runtime state.

 

 

 

Flashing 5 Hz = Controller and cache are performing a backup.

 

 

 

 

2

Red

Fault

When an error occurs, this LED is on. During power up, this LED

 

 

 

is solid for up to 2 seconds.

 

 

 

 

3

Green

Heartbeat

When the controller is in good health, this LED flashes at 1 Hz.

 

 

 

During power up, this LED is solid for up to 2 seconds.

 

 

 

 

P421 LEDs

Item

Color

Name

Interpretation

 

 

 

 

1

Green

Heartbeat

When the controller is in good health, this LED flashes at 1 Hz.

 

 

 

During power up, this LED is solid for up to 2 seconds.

2

Red

Fault

When an error occurs, this LED is on. During power up, this LED

 

 

 

is solid for up to 2 seconds.

3

Amber

Debug

On = Controller is in reset.

 

 

 

Off = Controller is in an idle or runtime state.

 

 

 

Flashing 5 Hz = Controller and cache are performing a backup.

 

 

 

 

Component identification 20