JLG 1250AJP Troubleshooting Manual page 315

• MAIN NOT UP - control system detected movement of
main boom angle sensor during tower telescope move-
ment (more than 80 counts)
• TWR IN TO MIN - tower length sensor not reading
between 304.9" and 305.9" (774.4 and 776.9 cm) when
ENTER is pressed. Visible through DIAGNOSTICS ?
BOOM SENSORS ? TOWER LENGTH 1 SENSOR: X.X".
Control system will allow additional attempts to retract
tower.
Step 8 - Position 8
The analyzer will read:
Lift tower down to stop – control system will stop at cylin-
der angle reading of 74.6° (approx 70° tower angle)
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Potential Calibration Failure Messages:
• TOWER TOO LOW - control system detected tower
angle less than 66° (visible through DIAGNOSTICS ?
BOOM SENSORS ? MAIN ANGLE L TO GRAVITY:
XXX.X) without stopping between tower lift cylinder
angle readings of 74.1° to 75.1° (visible through DIAG-
NOSTICS ? BOOM SENSORS ? TOWER CYLINDER
ANGLE: XX.X).
• TWR UP TO STOP - tower lift cylinder angle sensor not
reading between 74.1° and 75.1° when ENTER is
pressed. Control system will allow additional attempts
to correct tower angle.
• TOWER DOWN TO STOP - tower lift cylinder angle sen-
sor not reading between 74.1° and 75.1° when ENTER
is pressed. Control system will allow additional attempts
to correct tower angle.
• LOAD PIN FAULT - load pin corrected angle not
between -10.0° and 10.0°. Visible through DIAGNOS-
TICS ? LOAD PIN ? LOAD PIN ANGLE VALUE: XXX.X.
1250AJP
SECTION 5 - CALIBRATIONS
5-315