Harris Performance 7000 - Manual (Page 42)

Chapter 3: FR-6804/FR-6804-1 Frames Failure Conditions
16 6800/7000 Series - Frames and Power Supplies Installation and Operation Manual
Failure Conditions
If neither LED is illuminated, remove power to the fan tray unit
immediately. Extended duration of this short circuit condition will cause
damage to both the fan tray circuitry and the external power supply.
To turn off the power to the fan tray, follow these instructions:
1. Pull the black locking pins on each end of the FR-6804(1) front panel
until they snap out of position. These pins remain attached to the
panel.
2. Slide the front panel out, and then tilt down.
3. The 6804PS power supply is located on the right side of the frame.
Turn the On-Off switch to the Off position.
4. Close the FR-6804(-1) front panel, and then snap the locking pins
back into position. Power to the CF-6801 is now removed.
5. Check that air is being drawn in through the front panel
of the FR-6804(-1).