R4U8S User's Manual
Hardware Description
SD.DT.F06-1e
Page
15
4.3.1.3
Control LEDs
The control LEDs are located on the front panel of the R4U8S rack.
Figure 9: Control LEDs
Voltages: +3.3V, +5V, +12V, -12V
These LEDs monitor and show that the power supplied is within the permitted tolerances.
Green light: The power is on (ON/OFF Button) and the voltages are within the permitted tolerances.
Green light must remain illuminated (without flickering) when the system is powered on.
Fail Signals: Stdby, Temp, Fan, Sys
Stdby LED
: The standby LED indicates that the power supply cable is connected to the rack. The equipment
is ready for use, but not necessarily in use.
Green light: The power supply cable is connected, independently of the ON/OFF button status.
Temp LED
: This LED indicates that the rack temperature is within the permitted tolerances.
Red light: Temperature is out of the permitted tolerances.
Fan LED
: This LED indicates that the fans are working correctly
Red light: Fans are not working correctly.
Sys LED
: This LED indicates that the
ACFAIL
signal is present.
Red light:
ACFAIL
signal is present.
