Q-Logic 16HA Manuel D’Utilisation

. LEDs visible through lenses in the front of the chassis indicate 

chassis and port status. During a Reset operation (for about two seconds at the 
beginning of power-up) all LEDs are forced ON. The following definitions are 
valid following the Power-On-Self-Test (POST) when the POST finds no errors. 
Refer to 

, for information about how the 

LEDs act if the POST finds an error or if the control code (located in Flash 
memory) hangs up.

The Heartbeat LED indicates the status of the internal Switch processor and the 
results of Power-On-Self-Tests (POSTs) run at power-up.

Following a normal power-up the Heartbeat LED blinks about once per second to 
indicate that the Switch passed the POSTs and the internal Switch processor is 
running.

, for more information about 

Heartbeat LED error codes.

This LED is ON when any Power Supply is delivering power within normal limits 
to the Switch logic (the Power Button must also be depressed). If you have redun-
dant power supplies, the Power Good LED will stay ON even when one power 
supply stops working and the other picks up the load. The LED will go OFF when 
no supply is delivering the proper logic voltages.

This LED is normally OFF. It comes ON only when one supply in a redundant 
configuration fails, but the other supply has picked up the load. When this LED is 
ON, it is a signal to look at the Power Supply LEDs on the back of each Power 
Supply to determine which supply failed. Refer to 

 for the location of the 

power supplies and their LEDs. This LED is not meaningful in a system with only 
one Power Supply.