JLG 3246ES Service Manual - Manual (Page 132)

SECTION 5 - JLG CONTROL SYSTEM
5-12 – JLG Lift– 3121166
Help messages with the 2-3 flash code indicate difficulty with the ground controls.
2 3
FUNCTION PROBLEM – LIFT PERMANENTLY SELECTED
Lift switch (up or down) in the ground control box was closed
during power-up.
In Ground Mode, [Lift Up Digital Input is Energized or Lift Down
Digital Input is Energized] AND Power-up is Active. Retained
until the respective Digital Input is momentarily De-ener-
gized.
Lift Prevented
Release or repair the switch to
clear the message.
2 3 GROUND LIFT UP/DOWN ACTIVE TOGETHER
In ground mode, the control system has detected the lift up
and down are active simultaneously.
In Ground Mode, Ground Lift Up Digital Input is Energized and
Ground Lift Down Digital Input is Energized. Retained until
both the Digital Inputs are momentarily De-energized.
Lift Prevented
Check the lift switch and associ-
ated wiring in the ground con-
trol box.
2 3
NO DATA FROM TILT SENSOR – NOT CONNECTED OR
FAULTY
No signal from the tilt sensor mounted inside the ground con-
trol box.
Transitions on the Tilt X OR Tilt Y signals not detected for
2000mS. Retained until transitions on both are sensed.
Vehicle assumed Tilted (+20.0’ X, +20.0’ Y); Drive Stowed
Demand limited as in Worst-Case Slope Descent Functionality
for both Forward and Reverse
Drive will be slow in the Forward direction.
Check wiring and plug connec-
tions at the tilt sensor and at the
ground control board.
2 3 TILT SENSOR NOT CALIBRATED
The Tilt Sensor’s Calibration EEPROM is set to the signature
implanted by the In-Circuit Test Fixture. Retained until Calibra-
tion EEPROM is over-written by a valid calibration.
Vehicle assumed Tilted (+20.0’ X, +20.0’ Y); Drive Stowed
Demand limited as in Worst-Case Slope Descent Functionality
for both Forward and Reverse
Drive will be slow in the forward direction.
Calibrate the Tilt Sensor using
the calibration procedure to
clear the message.
2 3
FUNCTION PROBLEM -- BRAKE RELEASE PERMANENTLY
SELECTED The ground control box lift switch was closed up or down, dur-
ing power-up in ground mode.
Check if the lift switch is
obstructed or jammed. Check
the lift switch signal and wiring
to the ground board. Replace
ground board.
Help messages with the 2-5 flash code indicate that a function is prevented due to a cutout.
2 5
ELEV ANGLE SENSOR FAULTY – NOT MOUNTED OR VOLT-
AGE OUT OR RANGE
The input voltage from the sensor that measures lower arm
motion is outside acceptable range. This may be caused by
improper sensor mounting, difficulty with the sensor wiring,
or a faulty sensor.
The elevation sensor is unhealthy
Platform height assumed to be full elevation.
Check mounting, review sensor
wiring against the electrical
schematic, or replace the sensor
to clear the message.
Table 5-2. Flash Code Listing
Flash
Code
Help Message Cause Possible Resolve