JLG 1250AJP Service Manual - Manual (Page 488)

SECTION 6 - JLG CONTROL SYSTEM
6-56 – JLG Lift – 3121171
• “CAL STEERING”
• “CAL TILT SENSOR”
• “SELECT GRND MODE”
The analyzer will then prompt with “UNLOAD PLAT-
FORM?”, “LEVEL PLATFORM?”, “CENTER PLAT-
FORM?”, “JIB UP TO MAX?”, “MAIN DWN TO MIN?”,
“TWR DWN TO MIN?”(control system energizes
tower lift down and tower tele in with tower lift down
commands), “TWR IN TO MIN?”(control system
energizes tower lift down and tower tele in with
tower lift down commands) to ensure the machine is
set up in the proper position for Calibration Step 1.
2. Once the initial conditions are verified, the analyzer
will display “SKY WELDER YES”. If a sky welder is
not installed, press an ARROW key to switch to “SKY
WELDER NO. A similar set of menus will prompt
selection of Sky Cutter, Sky Glazier, Sky Bright, Pipe
Racks and Camera Mount. If Sky Bright is selected,
the analyzer will display “CAL FAILED” and
“REMOVE SKYBRIGHT”. If more then one accesso-
ries is selected except for the combination of Sky
Welder/Sky Cutter the analyzer will display “CAL
FAILED” and “# OF ACCESSORIES”. If a valid
accessory option has been selected after the cam-
era mount selection and the operator presses the
ENTER key , the analyzer will display “CALI-
BRATE?” on the bottom line.
3. After pressing the ENTER key , the analyzer will
read:
If there is a fault in the configuration process “CAL
FAILED” and “MAIN ANGL1 FAULT” or “MAIN
ANGL2 FAULT” will be displayed. The Control Sys-
tem will then record right main boom min angle, left
main boom min angle, retracted tower length 1
(upper), retracted tower length 2 (lower) and low cyl-
inder angle. The main boom min angle will be set at
–4.2 (ref tower). The low cylinder angle will be set to
1.0. The tower retracted length will be set at 305.4”
(775.7 cm). The right main boom angle sensor read-
ing must be within 5 and 25 and the left main
boom angle sensor reading must be within 155 and
175or “CAL FAILED” and “MAIN ANGL1 FAULT” or
“MAIN ANGL2 FAULT” will be displayed. The length
1 sensor and the length 2 sensor must be within
range or “CAL FAILED” and “TWR LEN1 FAULT” or
“TWR LEN2 FAULT” will be displayed. The cylinder
angle reading must be within range or “CAL
FAILED” and “CYL ANGL FAULT” will be displayed.
Step 2 - Position 2
1. After completing the previous step, the analyzer will
read:
The Control System will disable all functions except
auto platform level and main lift up. The Control Sys-
tem will energize main lift up, tower lift down and
tower tele in with the main lift up command until the
main boom transport angle limit switch is tripped.
The analyzer will display “CAL FAILED” and “TWR
NOT IN” if movement of either tower length sensors
is detected or “TWR NOT DWN” if movement of the
cylinder angle sensor is detected. The Control Sys-
tem will monitor and record the main boom angle