Harris Performance 7000 - Manual (Page 47)

6800/7000 Series - Frames and Power Supplies Installation and Operation Manual 21
LEDs Chapter 4: CF-6801 Cooling Frame
LEDs
A green LED indicates that power is supplied to the unit, while a red
LED indicates a failure sensed by a contact closure.
There are five criteria for failure in the CF-6801, indicated by the LEDs
and listed in the table below.
See “Failure Conditions”, on page 22.
LED Condition Function
Over-Current Sensing (red) If one or more of the fans short out, this LED
illuminates and the GPI closes.
Under-Current Sensing
(red) If one or more of the fans open-circuit, this
LED illuminates.
Over-Temperature Sensing
(red) If the temperature in the fan tray unit exceeds
125
° F (520 ° C), the red error LED turns on
and the relay closes to make contact for the
GPI output. The red LED continues to be lit
until the temperature has cooled down below
118.6
° F (48 ° C), when the relay resets itself
and the GPI output.
Under-Voltage Sensing
(green) The green LED indicates that the buck
converter is regulating correctly, (that is 9.5 V
to 10 V are established across the fans). If the
voltage across the fans falls below 8.8 V, the
green LED turns off, the red LED turns on,
and the relay closes the contact for the GPI
output to indicate bad voltage regulation. The
green LED should always be lit to indicate
correct voltage across the fans.
Over-Voltage Protection
(OVP) and Sensing (red) This feature protects the power distribution
circuitry from over-voltage conditions,
starting at 15 V, up to a maximum of 19 V. If
such a condition occurs, the power to the
converter is removed, the red LED turns on,
and the relay closes the contact for the GPI
output.