Fujitsu D2863 Tehnical Manual page 26

Temperature / system monitoring
Fan control
The fans are regulated according to temperature.
Sensor monitoring
The removal of, or a fault in, a temperature sensor is detected. Should this
happen all fans monitored by this sensor run at maximum speed, to achieve the
greatest possible protection of the hardware.
Voltage monitoring
When voltage exceeds warning level high or falls below warning level low an
alert will be generated.
System Event Log (SEL)
All monitored events of the system board are signalized via the Global Error
LED or CSS LED and recorded in the System Event Log. They could be
retrieved in the BIOS Setup, iRMC S2's Web interface or via the ServerView
Operations Manager.
PRIMERGY Local Diagnostic LEDs
Optical signaling through the LEDs on the system board identifies defective
modules and components (CSS functionality) as well as gaining information on
the PDA (Prefailure Detection and Analysis).
26 Technical Manual
D2863 (RX100 S6)