Obstruction Sensing System; Obstruction Sensing Pads (Qsr Models Only) - Terex Genie GR-12 Service Manual

Section 4 • Repair Procedures

Obstruction Sensing System

9-1
Obstruction Sensing Pads
The function of the Obstruction Sensing System is
to detect a person or an object standing on the
machine chassis. When a person or an object is
detected on top of the machine chassis, the
machine platform down function will not operate,
and an alarm will sound. The LCD readout at the
ground controls will display OAC: Obstruction
Above Chassis and the LED readout on the
platform controls will display OAC. Refer to the
examples below.
LCD Readout
LED Readout
4 - 28
How to Replace an Obstruction
Sensing Pad (QSR models only)
1 GR-12: Raise the platform
approximately 3 feet / 1 m.
GR-15 and GR-20: Raise the platform
approximately 5 feet / 1.5 m.
2 Open the battery cover. Rest the cover against
the chassis.
3 Lower the platform until the mast just contacts
the battery cover.
4 Turn the key switch to the off position and
disconnect the battery pack from the machine.
GR • QSR • QSW
November 2014
Crushing hazard. Keep hands
clear of the battery cover when
lowering the platform.
Electrocution/burn hazard.
Contact with electrically charged
circuits could result in death or
serious injury. Remove all rings,
watches and other jewelry.
Part No. T110280