Page 66
Speed Level Seres - Servce & Parts Manual
January 2019
Secton 6 - Electrcal System
Check CALIBRATIONS / HEIGHT CALS; the “ElevUp” value shows the recorded height where
the switch opened.
F20:HEIGHT<>0%
F21:HEIGHT<>0%
This message occurs if the platform height is not 0% after the platform has been fully lowered
at the end of a calibration step. The platform must return to the same height each time it is fully
lowered.
Check DIAGNOSTICS / SYSTEM to check the height.
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.
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