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Chapter 1 System Overview 9
System LED Indicators
The two system LEDs consist of a system health indicator and a fault indicator. The
system health indicator lights continuously green to show that the system is
functioning normally. The fault indicator lights when a problem is detected in the
system. Because it is important to know that a fault exists in the system, the fault
indicator remains lit whether the system is in normal operating mode, or is switched
to Standby mode using the keyswitch.
When you first power on the system, the LEDs are individually toggled on and off to
verify that each one is working correctly. After that, the LEDs operate as described in
the following table.
Name Icon Description
Power-on/
Activity
This green LED lights continuously when the system
power is on.
General fault This amber LED lights steadily when a system fault is
detected (including a fault reported by a power supply
LED fault).