JLG 3246E2 Service Manual - Manual (Page 48)

SECTION 2 - PROCEDURES
2-36 – JLG Sizzor – 3120855
INTRODUCTION
The JLG designed SMART System™ is a 24 Volt multiplex
motor control unit installed on the electric scissor lift
model 3246E2.
The SMART System™ has reduced the need for exposed
terminal strips, diodes and trimpots and provides simplic-
ity in viewing and adjusting the various personality set-
tings for smooth control of: acceleration, deceleration,
creep and max-speed for the lift, drive, steering and
optional power deck functions. The function select mem-
brane board, in the upper control box, also eliminates the
need for toggle switches and a separate power enable
button as this feature is built into each function select but-
ton on the board itself.
The lift, drive and optional power deck functions are con-
trolled by a joystick, with steering being controlled by a
rocker switch built into the top of the joystick. Drive, lift,
and the optional power deck functions are selected by
first pushing the appropriate momentary select buttons on
the membrane board and then moving the joystick either
in the “A” or “B” direction. If the joystick is not activated
within three seconds of selecting a function, it will be nec-
essary to re-select a function. High drive and positive trac-
tion are used in conjunction with the drive function.
The motor controller will control current output, as pro-
grammed for smooth operation and maximum cycle time.
Ground control speeds for platform lift and the optional
power deck are also programmed into the motor control-
ler. The motor controller also features an adjustable time
limit for positive traction. Another power saving feature is
the high speed drive current limit. This feature will auto-
matically control the drive speed and controller output
when it exceeds the pre-set current limit for a specified
time and reduce the motor speed, thus conserving power.
For safety, the machines are equipped with pothole pro-
tection and elevation cutback. The pothole protection is
employed as the platform is raised. If the pothole protec-
tion does not extend, the drive function will be disabled.
When the platform is raised, the drive function goes into
creep mode.
The JLG SMART System™ controller has a built in LED to
indicate any faults. The system stores recent faults which
may be accessed for troubleshooting. Optional equip-
ment includes an hourmeter, beacon light, tilt switch (light
and/or alarm), power deck, power deck extension limit,
function cutout, and ground alarm. These options may be
added later but some must be programmed into the motor
controller when installed.
The SMART System™ may be accessed by utilizing a cus-
tom designed, hand held analyzer (JLG kit no. 2901443)
which will display two lines of information at a time, by
scrolling through the program.
NOTE: The date code is determined by the first four digits of
the controller serial number which is located on the
label attached to the front of the controller.
The part number of the controller is located on the
controller decal.
To Connect the Hand Held Analyzer:
1. Connect the four pin end of the cable supplied with
the analyzer, to the top connection of the motor con-
troller and connect the remaining end of the cable to
the analyzer.
NOTE: The cable has a four pin connector at each end of
the cable; the cable cannot be connected back-
wards.
2. Power up the SMART System™ by turning the lower
key to the platform position and pulling both emer-
gency stop buttons on.
Using the Analyzer:
With the machine power on and the analyzer connected
properly, the analyzer will display the following:
HELP:
PRESS ENTER
At this point, using the RIGHT and LEFT arrow keys, you
can move between the top level menu items. To select a
displayed menu item, press ENTER. To cancel a selected
menu item, press ESC; then you will be able to scroll
using the right and left arrow keys to select a different
menu item.
The top level menus are as follows:
HELP
DIAGNOSTICS
RUN SYSTEMS TEST (NOTE: Ensure machine is
fully lowered before running systems test)
ACCESS LEVEL
PERSONALITIES
MACHINE SETUP
CALIBRATIONS (level 0 Manufactures Access Only)
If you press ENTER, at the HELP:PRESS ENTER display,
and a fault is present during power up, the analyzer dis-
play will scroll the fault across the screen. If there was no
fault detected during power up, the display will read:
HELP: EVERYTHING OK
If ENTER is pressed again, the display moves to the fol-
lowing display:
LOGGED HELP