R4U8S User's Manual
Hardware Description
SD.DT.F06-1e
Page
17
4.4
Monitoring Card
Start Up of the Monitoring Card
At the start up of the monitoring card, a LEDs flickering test is launched with 4 one second cycles which are
composed of 0.5 second of green state (
+3.3V, +5V, +12V
and
-12V
are lighted in green) and 0.5 second
of red state (except
Stdby,
all LEDs are lighted in red).
Temperature and Fan Control
The temperature acquisition is made by four I2C temperature sensors. If the temperature is higher than +70
°
C,
the
Temp
LED is lighted. The monitoring card controls the speed of three fans and is compliant to the following
graph:
If the Monitoring card detects one speed of the three fans lower than 45% of full speed, the
Fan
LED is lighted
and the other fans are set in full speed mode
Failure Detection List
Failure Description
Diagnosis
Temp LED flickers
The monitoring card has detected less than 4
temperature sensors
Temp LED is ON (red) but the
temperature is lower than
+70
°
C
The monitoring card has not detected any
temperature sensors at start up
Temp LED is ON (red)
The temperature is higher than
+70
°
C
Fan LED is ON (red)
The monitoring card has detected a fan failure
One voltage indicator LED is lighted
in green
The voltage level of this channel is correct
One voltage indicator LED is lighted
in red
The voltage level of this channel is not correct
Voltage indicator LEDs flicker
The monitoring card has detected a failure
Sys LED is ON (red)
A VME board has detected a failure
