JLG 15/20MSP Operator Manual - Manual (Page 64)

SECTION 3 - MACHINE CONTROLS, INDICATORS AND OPERATION
3-38 – JLG Lift – 3121230
3.13 OBSTRUCTION SENSING SYSTEM -
(MSP OPTION)
System Description
The Obstruction Sensing System (OSS) is designed to detect the
presence of obstructions within a predetermined detection zone
beneath the platform, when lowering the platform from an elevated
position.
NOTE: The OSS only operates normally when the Ground Control
Module - Power Selector Switch is set to PLATFORM
CONTROL MODE.
When the Power Selector Switch is set to GROUND CON-
TROL MODE the OSS will detect an obstruction but will
not stop platform downward movement or sound the
horn. However, the OSS Control Module LED will flash if a
sensor detects the presence of an object.
Operation
NOTE: See Figure 3-10. for the location of the OSS Electronic
module.
When the machine is powered on a RED LED located on the OSS
electronics module will illuminate. During platform lowering, if no
obstructions have entered the detection zone beneath the plat-
form, the platform will lower normally.
If an obstruction is detected within the detection zone beneath the
platform, the platform will;
• Stop Lowering
• The RED LED on the electronics module will flash
• The horn will sound three short blasts
If an obstruction is detected, have the obstruction cleared by
someone on the ground or carefully drive the lift until clear of the
obstruction. Reset the OSS by pressing the horn button on the
platform control once and continue machine operation. Should
the OSS falsely detect an obstruction, the system can be overrid-
den by pressing and holding the horn button while operating the
platform lowering controls.
ALWAYS CHECK THE AREA UNDER THE PLATFORM IS CLEAR OF
OBSTRUCTIONS BEFORE LOWERING THE PLATFORM.