GMG 3394-RT, Service Manual, Page: 21 / 31

Section
3394RT---6094RT Scissor Lifts - Service Pack
Page 1 6
5 - Troubleshooting
GP400 HELP MESSAGES
(
continued)
RETRACTING DECK! (no flash code)
All the above
HELP
messages indicate that a function is active – the machine
should be moving as requested by the operator
CLOSE TRIGGER
A platform function is selected but the trigger switch is not closed
VEHICLE TILTED
(no flash code)
(no flash code)
The machine is tilted beyond the limits set by
ADJUSTMENTS/TILT/Xtrip
and
Ytrip
; some functions may be prevented
CHECK DRIVE/LIFT SELECT SWITCH! 2/2
There is a problem with the platform drive/lift select switch – both modes are
selected together
CHECK GROUND INPUT SWITCHES! 2/2
There is a problem with the ground function select switches – more than one is
active at the same time.
CHECK JOYSTICK SWITCHES! 2/2
There is a problem with the platform joystick switches – both directions are
selected together
FACTORY OVERRIDE (fast flashing)
When the controller is first shipped, prior to initial calibration, it is configured in a
special “factory override” state. In this state, none of the normal shutdowns or
interlocks will occur – the scissor lift machine can be freely lifted/lowered and
driven irrespective of any calibration needs, tilt, etc.
As soon as an EZcal is connected to the controller, the factory override state is
ended, in preparation for calibration.
If calibration does not occur, then the factory override state will recur if the EZcal
is disconnected and power is switched off/on.
IMPORTANT: Never use a machine in factory override; this state is ONLY
intended for use during manufacture! While factory override is active, the
LED is rapidly flashed on/off.
FAULT: BAD 5V SENSOR SUPPLY - CHECK P2-1 WIRING! 4/5
The “5V sensor” supply feeds P1-1 (for the joystick) and P2-1 (for the height /
pressure sensors)
Check wiring for short-circuits or misconnection to other wiring
4/2 FAULT: BAD INTERNAL 5V!
FAULT: BAD INTERNAL 12V! 4/3
The internal “12V” supply is out of range; if the fault remains, the controller may
have to be replaced
FAULT: BAD INTERNAL SLAVE! 4/2
The internal “slave” is not operating correctly; if the fault remains, the controller
may have to be replaced