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Three status indicator lights (see Figure 3-2 ) show the state of the sys-
tem: (Key On) DC power supplied, (Run) execution, and (Fault) errors.
Table 3-2 describes the conditions indicated by the lights.
Control Panel Indicator Lights
Table 3-2
Light
Color
State
Green
On
Key On
Off
Green
On
Run
Off
Yellow
On
Fault
Slow
Flash
Fast
Flash
Off
Meaning
Power is supplied to entire system; the
blower is running.
Power is supplied only to the cabinet
control logic module.
System is executing operating programs
or certain power-up tests.
the execution of operating system pro-
grams when the keyswitch is in the En-
able position.
System is in console mode, operating
system is not running, or the system is
turned off.
Fault on LSB or system I/O bus.
Power sequencing is in progress or air-
flow error is detected.
Power system error, airflow error, or
keyswitch in Disable position transition
detected.
No faults were found.
Controls and Indicators 3-5
halts
Ctrl/P
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