SECTION 6 - LSS (LOAD SENSING SYSTEM) SERVICE
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6-9
6.7
LSS TROUBLESHOOTING
The following tables are furnished to provide possible resolutions for common difficulties.
Table 6-7. LSS Troubleshooting
PROBLEM
POSSIBLE RESOLUTION
JLG Analyzer displays “FAIL NOT IN GND
MODE” during LSS calibration
The technician has triggered the calibration process but the keyswitch is not in the Ground Mode position. Change
the key-switch position and re-attempt LSS calibration.
JLG Analyzer displays “FAIL CAL ANGLE” dur-
ing LSS calibration
The elevation sensor is not calibrated and this must be completed prior to LSS calibration. Execute the elevation sen-
sor calibration procedure using CALIBRATIONS
SET STOW ELEV and CALIBRATIONS
SET MAX ELEV. Re-attempt
LSS calibration afterward.
JLG Analyzer displays “FAIL PLAT NOT
STOWED” during LSS calibration
The LSS calibration procedure must start with the platform completely stowed. Lift down using ground controls and
then re-attempt LSS calibration.
JLG Analyzer displays “FAIL MOTION
STOPPED” during LSS calibration
The technician released lift down during the LSS calibration procedure and the calibration data points could not be
collected by the control system. Re-attempt LSS calibration.
JLG Analyzer displays “CAL FAIL” during LSS
calibration
The technician halted the LSS calibration procedure by pressing ESC. Alternately, calibration data points collected
from the vehicle did not fit within guidelines. This can be caused by debris in the platform, excessive slide block fric-
tion, or structural damage. This can also occur when accessories are fitted to the platform and the PERSONALITY
LOAD
ACC’Y setting is adjusted improperly. Remove debris and address any damaged components. Refer to the
documentation for Sky Accessories.
LSS Visual and Audible Overload Warnings fail
to sound when the platform is loaded beyond
rated load. Controls remain functional at
Ground and Platform Control positions.
• LSS is not enabled in the control system. Connect the JLG Analyzer and enter the Access Level 1 password (33271).
Navigate to MACHINE SETUP
LOAD and adjust the configuration to CUTOUT ALL to prevent platform and ground
controls during an overload. Adjust the configuration to CUTOUT PLTM to prevent platform controls only during an
overload.
• LSS requires re-calibration. Re-calibrate the elevation sensor first, and then the LSS using the procedures listed in
this document.
LSS Visual and Audible Overload Warnings are
active when the platform is empty.
• LSS has not been calibrated or calibration has been lost. Calibration data points are stored within the Ground
Module so replacement of this component will cause the need for re-calibration. Adjusting some settings within
the MACHINE SETUP menu will also delete the calibration.
• LSS requires re-calibration. Re-calibrate the elevation sensor first, and then the LSS using the procedures listed in
this document.
• A fault related to LSS has occurred and the vehicle has assumed the platform is overloaded to be conservative.
Refer to the resolution of specific faults in the table below.
Controls remain functional at the Ground
Control position during an overload. Controls
at the Platform Control position are pre-
vented.
The MACHINE SETUP
LOAD setting is configured to prevent Platform Controls only. Connect the JLG Analyzer
and enter the Access Level 1 password (33271). Proceed to the MACHINE SETUP
LOAD menu and adjust the
configuration to CUTOUT ALL to prevent platform and ground controls during an overload.
PLATFORM OVERLOADED (255) fault is trig-
gered
This fault is triggered whenever the LSS is enabled and overloaded.
LSS HAS NOT BEEN CALIBRATED (825)
This fault is triggered when LSS has not been calibrated or a configuration change in MACHINE SETUP has deleted
the calibration. Follow the procedure in this document for LSS calibration to resolve.
LSS – OUT OF CALIBRATIO N (8217)
LSS did not meet performance expectations during the verification procedure. If the procedure was not executed
properly, cycle power and re-attempt. Otherwise, the LSS should be re-calibrated. Follow the procedure in this doc-
ument for LSS calibration to resolve.
LIFT CYLINDER HEAD PRESSURE 1 – OUT OF
RANGE HIGH (8523)
Pressure1RawValue is greater than 22.0mA for 500mS.
Only applicable if {MACHINE SETUP-> LOAD = CUTOUT ALL or CUTOUT PLTM} AND {MACHINE SETUP --> LOAD CFG =
PRESSURE}
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