September 2016 Service and Repair ManualGround ControlsPart No. 1272222 GS-84 • GS-90 538 Press the yellow platform down button todecrease the drive speed or press the blueplatform up button to increase the drive speed.Refer to Specifications, PerformanceSpecifications.Note: The performance achieved should always bewithin specifications.9 Press the lift function enable button.Result: TUNE SPEEDS is showing in thediagnostic display window. The ECM is now inprogramming mode.1 diagnostic display2 blue platform up button3 lift function enable button4 yellow platform down button10 Press the lift function enable button.11 Use the yellow platform down arrow to scroll tomax rev high speed drive.Result: MAX REV HIGH TORQUE DRIVE isshowing in the diagnostic display window.12 Press the lift function enable button.13 Press the yellow platform down button todecrease the drive speed or press the blueplatform up button to increase the drive speed.Refer to Specifications, PerformanceSpecifications.Note: The performance achieved should always bewithin specifications.14 Press the lift function enable button.15 Push in the red Emergency Stop button to theoff position at the ground controls.How to Adj ust the Rais ed Drive SpeedHow to Adjust the Raised DriveSpeedTip-over hazard. Do not adjustthe lift and/or drive speedhigher than specified in thisprocedure. Setting drive speedgreater than specificationscould cause the machine to tipover resulting in death orserious injury.Note: On machines with software revision B1 orlower, raised drive speeds in forward and reverseare simultaneously adjusted, resulting in bothdirections of travel operating at the same speed.On machines with software revision C0 or higher,the raised forward drive speed and the raisedreverse drive speed may be adjusted independentof one another. Refer to Repair Procedure, How toDetermine the Revision Level.Note: The GS-5390 will not drive with the platformraised above 30 feet / 9.1 m.1 Pull out the red Emergency Stop button to theon position at the platform controls.2 Push in the red Emergency Stop button to theoff position at the ground controls.3 Turn the key switch to ground control.4 Press and hold both the blue platform up andyellow platform down buttons. Pull out the redEmergency Stop button to the on position atthe ground controls.Result: TUNE SPEEDS is showing in thediagnostic display window. The ECM is now inprogramming mode.
