JLG DVSP Series Operator Manual - Manual (Page 42)

SECTION 3 - MACHINE CONTROLS, INDICATORS AND OPERATION
3-22 – JLG Lift – 3121135
3.14 OBSTRUCTION SENSING SYSTEM
(DVSP -
OPTION)
System Description
The Obstruction Sensing System (OSS) is designed to
detect the presence of obstructions within a predeter-
mined detection zone beneath the platform, when lower-
ing 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
CONTROL MODE the OSS will detect an obstruc-
tion but will not stop platform downward movement
or sound the horn. However, the OSS Control Mod-
ule LED will flash if a sensor detects the presence of
an object.
Operation
NOTE: See Figure 3-9. for the location of the OSS Elec-
tronic module.
When the machine is powered on a RED LED located on
the OSS electronics module will illuminate. During plat-
form lowering, if no obstructions have entered the detec-
tion zone beneath the platform, 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 overridden by pressing
and holding the horn button while operating the platform
lowering controls.
WARNING
ALWAYS CHECK THE AREA UNDER THE PLATFORM IS CLEAR
OF OBSTRUCTIONS BEFORE LOWERING THE PLATFORM.
OSS Pre-Start Inspection
(See Figure 3-9.)
From ground controls, raise platform approximately 5'-6'.
The RED LED on the electronic module will be illuminated
when power is applied. If an obstruction, such as a pad of
paper is placed under any of the transducer sensor
arrays, the RED LED will flash and remain flashing while
the obstruction is present and stop flashing 3 seconds
after the obstruction is removed. Check the operation of
each transducer sensor array by placing an object individ-
ually under each sensor array (within approximately 6"-12")
and checking if the RED LED starts to "flash", and stops
flashing 3 seconds after the obstruction is removed. Also,
inspect the transducer arrays and electronic module for
physical damage, loose wires, loose mounting hardware,
etc.
Figure 3-8. OSS Transducer Sensor Array Location.
1. Transducer Arrays #1 through #6
2. Underside of DVSP Platform
#5
#3
#1 #2
#4
#6
2
1