“4069RT” Service and Parts Manual March 2014
Page 2-21
GP400 CONTROL MODULE SETUP
7. Press Right Arrow to HEIGHT SETUPS, Press Enter.
• Display reads CALIBRATE HEIGHT
8. Press Enter.
• Display reads PLATFORM DOWN? Verify that platform is fully lowered.
9. Press Enter.
• Display reads PLEASE LIFT.
10. Hold lower controls switch in the up position until machine is fully elevated, then
release switch.
• Display reads PLEASE LOWER.
11. Hold switch in down position until platform is in the fully lowered position. Release
switch.
• Display reads FINISHED.
OPTIONAL OVERLOAD SENSING SYSTEM CALIBRATIONS
Do not perform this procedure UNLESS your machine is equipped with the
optional Overload Sensing System.
Optional Overload Sensing System
Platform Load Calibration
Perform the Tilt Sensor Calibration outlined at the beginning of this section (" Tilt
Sensor Calibration" on page 2-20).
Platform Load Calibration must be performed any time the GP400 is replaced or signifi-
cant repairs are made to the elevating assembly.
During the calibration procedure the platform is fully raised and lowered three times:
• “DYNAMIC” calibration – fully loaded platform raised & lowered in one continuous movement.
DYNAMIC measurements are taken.
• “LOADED” calibration – fully loaded platform raised & lowered with stops to take measure-
ments. STATIC measurements are taken.
• “EMPTY” calibration – unloaded platform raised & lowered with stops to take measurements.
STATIC measurements are taken.
The following procedure must be followed COMPLETELY to calibrate the optional Over-
load Sensing System. If any problem is detected, the procedure stops and an Error Mes-
sage will display on the EZ-Cal. Explanations of each message and suggested corrections
can be found in the section of this manual following the calibration procedure.
NOTE: If the calibration procedure is interrupted, completed phases do not need to be repeated. A “REDO” prompt
will appear – answer “NO” if there is no reason to repeat the phase, or “YES” if the phase must be repeated (for
example because the wrong platform load was used on the previous phase).
1. Drive machine to a flat, level surface where it can reach full elevation. Choose a place
where the rated load can be placed in the platform and later removed without
moving
the machine.
2. Place the rated load in platform (see platform labels or serial plate). The load must be
evenly distributed on the platform.
3. Turn selector switch to Base controls.
4. Plug EZ-Cal into connector P9 on GP400 Control Module. EZ-Cal display reads
HELP: PRESS ENTER
5. Press right arrow to ACCESS LEVEL 3, Press Enter.
• Display reads CODE 0000
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