Compaq AlphaServer DS20 Wartungshandbuch Seite 37

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System Overview 1-27
The power control logic performs these functions:
Monitors system temperature and powers down the system 30 seconds after it
detects that internal temperature of the system is above the value of the
environment variable over_temp. Default = 55
0
C.
Monitors the system and CPU fans and powers down the system 30 seconds after
it detects a fan failure.
Provides some visual indication of faults through LEDs.
Provides I
2
C interface for fans, power supplies, and temperature signals:
Power supply 0, 1: present
Power supply 0, 1: power OK
CPU fan 0, 1: OK
CPU 0, 1: present
Overtemp: Temp OK
System fan 0, 1: OK
Fan Kit OK
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