JLG 3246ES Service Manual - Manual (Page 130)

SECTION 5 - JLG CONTROL SYSTEM
5-10 – JLG Lift– 3121166
0 0 DRIVING AT CUTBACK -- POTHOLE STILL ENGAGED
While stowed, drive speed is reduced (due to lower ground
clearance) since the control system detected that the pot-hole
protection mechanism is deployed (failed to retraced).
In platform mode with a healthy elevation sensor, elevation
sensor less than 0.15V and the elevation prox closed and pot-
hole protection’s PHP switches detect down.
In platform mode with an unhealthy elevation sensor, the ele-
vation prox is closed AND pot-hole protection’s PHP switches
detect down.
Clear the obstacle blocking the
pot-hole protection mecha-
nism, repair the mechanical
problem, re-adjust the pot-hole
limit switches, or repair the wir-
ing to correct the problem.
0 0 FUNCTIONS LOCKED OUT -- SYSTEM POWERD DOWN
After 2 hours without activity, the control system enters a low-
power state to preserve battery charge.
Check batteries charge, condi-
tion, etc. Normal operation
should resume after a power
cycle.
0 0
DRIVE PREVENTED -- ELEVATED AND ABOVE DRIVE CUT-
OUT 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.
Help messages with the 2-1 flash code occur during after power-up of the vehicle control system.
2 1 STARTUP
This help message is issued at each power-up. This serves to
indicate which messages have been recorded in logged help
since the last power-up event.
No motion restrictions.
No motions restricted.
2 1
KEYSWITCH FAULTY -- PLATFORM & GROUND ACTIVE
TOGETHER
The platform and ground mode inputs from the keyswitch are
active at the same time. The control system will default to
ground mode when if this happens. The keyswitch and wiring
inside the ground control box should be examined / repaired.
Platform EMS digital input energized and ground mode select
digital input energized.
Default to ground mode operation and lift up prevented
Re-cycle power once the prob-
lem has been resolved to clear
this difficulty.
Help messages with the 2-2 flash code indicate difficulty with the platforms controls.
2 2 FUNCTION PROBLEM -- HORN PERMANENTLY SELECTED
Horn switch in the platform control box was closed during
power-up.
In platform mode, the Indoor/Outdoor switch digital input is
energized and power-up is active. Retained until either is
momentarily de-energized.
Previously selected Indoor/Outdoor mode maintained.
Release or repair the switch to
clear the message.
2 2
FUNCTION PROBLEM -- INDOOR / OUTDOOR PERMA-
NENTLY SELECTED
Indoor / Outdoor switch in the platform control box was closed
during power-up.
In Platform Mode, the Indoor / Outdoor Switch Digital Input is
Energized and Power-up is Active. Retained until Digital Input
is momentarily De-energized.
Previously selected Indoor / Outdoor Mode maintained
Release or repair the switch to
clear the message.
Table 5-2. Flash Code Listing
Flash
Code
Help Message Cause Possible Resolve