JLG 530LRT, Service And Maintenance Manual

Page: 232 / 262

SECTION 6 - LSS SETUP/CALIBRATION/SERVICE
6-10 3121781
Table 6-8. LSS Troubleshooting Chart - Host System Functionality
Difficulty Possible Resolution
The Visual and Audible Overload Warnings
fail to sound when platform is loaded
beyond Rated Load, or when simulated by
unplugging a Shear Pin Load Cell from the
LSS Module. Controls remain functional at
Platform and Ground Control positions. The Host Control System is failing to regard the overload signal from the LSS Module, or the signal is shorted.
1. The Load Sensing System must be enabled within the Host Control System. Plug the JLG Analyzer into the Host Con-
trol System, enter the Access Level 1 password (33271), and examine the MACHINE SETUP, LOAD sub-menu. The
selection “CUTOUT PLT” should be displayed for European Community compliance (platform controls prevented dur-
ing overload, ground controls remain operational). In country- or customer-specific circumstance, the selection
“3=CUTOUT ALL” is used (platform and ground controls prevented during overload).
2. The signal between the LSS Module and the Host Control System is shorted. The Platform Module’s J1-20 is an
input, and it connected to the J1-5 output on the LSS Module To examine the status of this signal, plug the JLG Ana-
lyzer into the Host Control System, enter the Access Level 1 password (33271), and examine the DIAGNOSTICS, SYS-
TEM, LOAD display. The display will indicate “OK” when the Platform Module’s input is energized (approximately
12V), and “OVERLOADED” when it is de-energized (0V). Refer to the Wiring Diagram for Load Sensing System for
details.
3. Observe the LSS Module’s assessment of overload using the JLG Analyzer plugged into the LSS Module’s connection.
Proceed to the DIAGNOSTICS, OVERLOADED? display. The display should indicate “OVERLOADED? N” when the plat-
form is empty, and “OVERLOADED? Y” when the platform is overloaded. If the assessment is improper, the difficulty
may be a result of a General or Measurement Performance issue. Review the Possible Resolutions under those cate-
gories.
4. If the LSS Module’s J1-5 Output does not appears to coincide with the DIAGNOSTICS, OVERLOADED? display, then the
LSS Module is suspect. Substitute to determine cause of failure.
The Visual and Audible Overload Warnings
sound even when the platform is empty.
Controls are prevented in the same manner
as when overloaded. The LSS Module is un-powered, un-calibrated, or is experiencing a Measurement Performance difficulty. Alternately, the
Host Control System is not receiving the proper signal from the LSS Module.
1. Ensure that the LSS Module is powered. The LSS Module’s LED will be lit or flash if the module is powered. If not,
ensure that approximately 12V is present between J1-1 and J1-2 on the LSS Module (J1-1 is positive). Trace the
Ignition and Ground supply wires into the Host Control System’s wiring harness using the wiring diagram to locate
the difficulty.
2. Plug a JLG Analyzer into the LSS Module’s connection and ensure that the Host Control System is powered-up. When
HELP:PRESS ENTER is displayed, press the ENTER key on the Analyzer. If “EVERYTHING OK” is displayed, it is probable
that the Overload Signal from the LSS Module is not reaching the Host Control System. This signal is present on LSS
Module’s J1-5 and is approximately 12V normally, and 0V during an overload. This signal eventually reaches the
Main Terminal Box to provide the overload signal. Refer to the Wiring Diagram for wire color, number, and terminal
information.
3. If the Analyzer displayed “OVERLOADED” in the previous step, press the ENTER key again. If “NO CAL” is displayed,
the Load Sensing System has not been properly calibrated. Refer to the Calibration portion of this manual.
4. If another fault is displayed, refer to the portion of this manual that describes Fault Messages and their causes.
5. The difficulty may be a result of a Measurement Performance issue. Review the Possible Resolutions under those
categories.
Controls remain functional at the Ground
Control position during an overload, or
when simulated by unplugging a Shear Pin
from the LSS Module. The Control at the
Platform Control position are prevented. The Host Control System is configured to prevent platform controls only in the event of overload. Alternately, the Host Control
System can be configured to prevent ground and platform controls for country- or customer-specific circumstances.
Plug the JLG Analyzer into the LSS Module’s connection and enter the Access Level 1 password (33271). Proceed to the
MACHINE SETUP, LOAD sub-menu. Set this parameter to “CUTOUT PLT” to prevent platform controls in the event of overload.
Set this parameter to “CUTOUT ALL” to prevent platform and ground controls in the event of overload.