Operator's Manual
Inspections
At the Ground Controls
1 Select a test area that is firm, level and free
of obstruction.
2 Pull out the platform and ground red
Emergency Stop button to the on position.
3 Turn the key switch to ground control.
Result: The LCD screen will come on and
display SYSTEM READy.
Note: In cold climates, the LCD readout screen will
need to warm up before the display appears.
4 Start the engine. See Operating Instructions
section.
Test Emergency Stop
5 Push in the red Emergency Stop button to
the off position.
Result: The engine should shut off and no
functions should operate.
6 Pull out the red Emergency Stop button to
the on position and restart the engine.
Test the Up/Down Functions
The audible warnings on this machine and the
standard horn all come from the same central
alarm. The horn is a constant tone. The descent
alarm sounds at 60 beeps per minute. The alarm
that goes off when the machine is not level sounds
at 180 beeps per minute.
7 Do not press the lift function enable
button. Press and hold the platform
up button.
Result: The platform should not raise.
Fourth Edition • Fourth Printing
8 Press and hold the lift function enable button.
Press and hold the platform up button.
Result: The platform should not raise.
9 Press and hold the lift function enable button.
Press and hold the platform down button.
Result: The platform should lower. The
descent alarm should sound while the
platform is lowering.
10 Turn the key switch to platform control.
At the Platform Controls
Test Emergency Stop
11 Push in the platform red Emergency
Stop button to the off position.
Result: The engine should shut off and no
functions should operate.
12 Pull out the red Emergency Stop button to
the on position and restart the engine.
Result: The indicator light
should be green.
Test the Horn
13 Press the horn button.
Result: The horn should sound.
28 GS-3384 • GS-3390• GS-4390• GS-5390 Part No. 133564
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