Lippert Components Ground Control 3.0 - Manual (Page 6)

Rev: 01.30.2015
Page 6
Ground Control 3.0 Service Manual
Homing Jacks
1. Introduce an error - disconnect one of the hall effect sensor wires at the controller.
2. Attempt to operate the jack that is associated with the sensor wire that was disconnected. The touch
pad screen will display an error for that jack.
3. Reconnect the hall effect sensor wire. Manually extend all jacks down a minimum of 6 inches.
4. Press and hold the retract button until all of the jacks begin to retract. The jacks will retract until they
reach the hard current limit.
5. The jacks are now “homed.”
NOTE: If the jacks do not retract, an error should display on the touch pad screen. This is typically caused by
wiring interruption.
NOTE: In order to "home" jacks, middle jacks MUST also be extended. Refer to Basic Jack Operation for
middle jack operation.
Zero Point Calibration
The “Zero Point” is the programmed point that the unit will return to each time the Auto Level feature is used. The
“Zero Point” MUST be programmed prior to using the Auto Level feature to ensure the proper operation of the
system.
NOTE: Prior to starting this procedure, double check all connections on the controller, jacks, and touch pad.
1. Manually run the jacks to level the unit. This is best achieved by placing a level in the center of the unit
and leveling it both front to back and then side to side. (See “Basic Jack Operation” for instructions on
how to manually operate the system).
2. Once the unit is level, turn off the touch pad.
3. With the touch pad off, press and release the “FRONT” button (Fig. 1G) five (5) times and then press
and release the “REAR” button (Fig. 1J) five (5) times.
4. The touch pad will flash and beep and the display will read “ZERO POINT CALIBRATION ENTER to set,
Power to Exit” (Fig. 5).
5. To set the current position as the zero point, press the “ENTER” button (Fig. 1C).
Fig. 5
Fig. 6
Fig. 7
6. LCD display will read “Zero Point stability check” (Fig. 6).
7. LCD display will read “Zero point set successfully” once process is complete (Fig. 7).
8. The system will set this point as its level state and the touch pad will turn off.