First Edition • First Printing Operator's Manual SupplementSoftware UpdatePart No. 1288739GT Lift Guard™ Contact Alarm 15Softwar e U pdateMachines with a control system software revisionof "P" or higher do not require a software upgrade.Machines with revision of "N" or lower, and isequipped with proportional lift control, will require asoftware upgrade.Software VersionNote: Before proceeding verify the version ofsoftware installed on your machine. Thesoftware revision is displayed at the GCONLCD.1 Turn the key switch to ground controls orplatform controls and pull out the redEmergency Stop button to the on position atboth ground and platform controls.Result: The PCON LCD will show "CH".Result: The GCON LCD will show the machinemodel and hour meter information. After3 seconds, the machine model will not showon the display.2 Press the ground control scroll down button.Result: The GCON LCD will show the softwarerevision and hour meter information. After5 seconds, the ground controls LCD will returnto machine model and hour meter information.1 GCON LCD2 scroll down button3 Push in the red Emergency Stop button to theoff position at both the ground and platformcontrols and turn the key switch to the offposition.Result: Revision "P" or higher, test the contactalarm. Refer to Function Test.Result: Revision "N" or lower, update themachine software. Refer to Firmware SiteDownload.