Display Devices Lifts up up 400 lbs - Manual (Page 26)

1/17/07 26
Recover Lift from LOWER LIMIT SWITCH ACTIVATION and EMERGENCY
OVERRIDE
When the Lift is lowered beyond its lower limit or Service/Maintenance position, a small
wheel bearing activates a safety shut-off on the lower limit switch. It is located on the
channel near the wheel bearing on the scissors. If the lift will not respond to any
command buttons and the LED on the remote and Control box blinks seven times,
proceed with the following.
The procedure is also required
if a new control box is installed.
1. Remove the back cover of the remote control with a small Phillips-head
screwdriver. Now you have access to the EMERGENCY OVERRIDE button on
the circuit board.
2. If the LED is blinking you must clear the error. Press and hold the STOP button
for 15 seconds then release.
3. Hold in the EMERGENCY OVERRIDE button, followed by the UP button. The
lift will return to its HOME position in the ceiling, allowing the lift to reset its
memory.
4. Put the cover back on the remote.
5. Put the lift into MANUAL MODE (OVERRIDE + UP).
6. Press the OVERRIDE and SET buttons at the same time. This allows you to set
a new Electronic Lower Limit position for the lift.
7. Press and hold the DOWN button until the small wheel bearing on the upper
frame is ½ inch from tripping the lower safety switch (release button before
wheel bearing touches switch) or reaches the desired SERVICE/MAINTENANCE
position (but not so low as to activate the safety switch again!)
8. Press both the OVERRIDE and SET buttons at the same time. This will reset
the electronic lower limit switch.
9. Return the remote to AUTOMATIC MODE (OVERRIDE + STOP).
10. Press the UP button, and allow the lift to travel up to its home position.
11. Operate the lift to verify the Show and Maintenance positions are programmed.
Lower limit switch