JLG 3246ES Service Manual - Manual (Page 134)

SECTION 5 - JLG CONTROL SYSTEM
5-14 – JLG Lift– 3121166
2 5
ELEV PROX PERMANENTLY CLOSED – CHECK PROX AND
ANGLE ADJUSTMENT
The Elevation Proximity Switch is closed to indicate that the
platform is stowed, but the elevation sensor’s voltage indicates
that the platform is elevated. To be conservative, the control
system will assume that the platform is elevated, and the drive
speed will be restricted to elevated.
Elevation Sensor is “Healthy” AND the Elevation Sensor’s
Zeroed Voltage is > 0.15V AND the Elevation Prox Switch is
Closed for 2000mS. Retained until situation changes.
Refer to Platform Position Sensor Functionality.
Check elevation switches.
Replace if necessary.
2 5
DRIVE & LIFT PREVENTED – BRAKES ELECTRICALLY
RELEASED FOR TOWING
The manual brake release has been activated to allow the vehi-
cle to be towed.
Brake release digital input is energized
Drive and Lift Prevented
Disengage the manual brake
release.
2 5
DRIVE PREVENTED – ELEVATED ABOVE DRIVE CUTOUT
HEIGHT
The Drive Cutout functionality is enabled, and the platform is
elevated above the calibrated cutout height.
Drive Cutout is set to 1=YES AND the Elevation Sensor is
“Healthy” AND the Elevation Sensor’s Zeroed Voltage is Greater
Than the Calibrated Drive Cutout Voltage.
Refer to Drive Cutout Functionality.
Check elevation switches
Check pothole switches.
2 5
MODEL CHANGED -- HYDRAULICS SUSPENDED - CYCLE
EMS
The model selection has been changed.
Check ANALYZER -> MACHINE
SETUP -> MODEL NUMBER.
Replace ground board.
2 5 DRIVE PREVENTED -- BRAKES NOT RELEASING
While driving on a level surface, armature current was > 150A
for five seconds. Brakes assumed to not be releasing properly.
Ensure vehicle is not stuck on
something preventing move-
ment. Check/repair drive motor
wiring, brakes or mechanical
issues.
Help messages with the 3-1 flash code indicate that a contactor did not close when energized.
3 1 OPEN CIRCUIT LINE CONTACTOR
The Power Module’s line contactor drive circuitry passed
power-up self-tests, but the line contactor did not close when
energized.
The Power Module is reporting a “Contactor Did Not Close”
Fault Code (15d).
Drive, Steer, & Lift Up Prevented.
Refer to CANbus documentation
for Power Module Message -
Status.
3 1 CONTACTOR DRIVER PERMANENTLY OFF
The Power Module’s Line Contactor drive circuitry failed to
energize during power-up self-tests.
The Power Module is reporting a “Contactor Driver 1 Perma-
nently Off” Fault Code (22d).
Drive, Steer, & Lift Up Prevented.
Refer to CANbus documentation
for Power Module Message -
Status.
Help messages with the 3-2 flash code indicate that a contactor did not open when de-energized.
3 2 LINE CONTACTOR MISWIRED ON OR WELDED
The Power Module’s Line Contactor Drive Circuitry passed
power-up self-tests, but the line contactor did not open when
de-energized.
The Power Module is reporting a “Contactor Welded” Fault
Code (14d).
Drive, Steer, & Lift Up Prevented.
Refer to CANbus documentation
for Power Module Message -
Status.
Table 5-2. Flash Code Listing
Flash
Code
Help Message Cause Possible Resolve