Mec 4069RT - Page 70

“4069RT” Service and Parts ManualMarch 2014
Page 2-26
GP400 CONTROL MODULE SETUP CALIBRATION PROBLEMS
F22:HEIGHT<>100%
F23:HEIGHT<>100%
This message occurs if the platform height is not 100% after the platform has been fully
raised during a calibration step. The platform must return to the same height each time it
is fully raised. Check DIAGNOSTICS / SYSTEM to check the height.
F24:TOO MANY
This message occurs if too many static measurements are taken during a calibration step.
In the rare event that this occurs, please call MEC for assistance.
F25:CHECK ELEV
F26:CHECK ELEV
This message indicates a problem with the elevation switch (P7-5) during the STATIC
phases.
The switch is either staying closed to a higher height, or staying open to a lower height,
than that recorded during the DYNAMIC phase.
F27:BAD HEIGHT
This message indicates a problem with the height sensor output (P8-2 and P8-6) during
the STATIC calibration phases.
The height sensor output must be between 1.0V and 4.0V at all times.
Check DIAGNOSTICS / SENSORS to see the output. A reading of 0V or 5V is probably
due to a wiring problem.
F30:BAD HEIGHTS
This message indicates that the recorded heights are not increasing during STATIC lift, or
are not decreasing during STATIC lower.
This problem may be caused by repeatedly opening and closing the UP or DOWN switch
during the STATIC phases.
F31:REJECT CURVE
The DYNAMIC pressure curve is unacceptable.
An initial pressure peak when the platform lifted cannot be found between 0% and 15%
height.
Check for proper weight in the platform and check pressure sensor and lift cylinder
hydraulics.
F32:REJECT CURVE
The DYNAMIC pressure curve is unacceptable.
There should be a lowest pressure about halfway through the lift (i.e.: near 50% height);
the lowest pressure measured is at too low a height.
Check for proper weight in the platform and check pressure sensor and lift cylinder
hydraulics.
F33:REJECT CURVE
The DYNAMIC pressure curve is unacceptable.
There should be a lowest pressure about halfway through the lift (i.e.: near 50% height);
the lowest pressure measured is at too high a height.
Check for proper weight in the platform and check pressure sensor and lift cylinder
hydraulics.
F34:REJECT CURVE
The DYNAMIC pressure curve is unacceptable.