Service manual

Load Sensing System - CE (Continued)
SKYJACK, Page 17
SJIII Compact Series
143909
Section 4 - Troubleshooting Information Service and Maintenance
4.3-26 Flash Code F27:Bad Height
1. This message indicates a problem with the height sensor output (P4-3) during the STATIC 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.
4.3-27 Flash Code F30:Bad Heights
1. This message indicates that the recorded heights are not increasing during either STATIC lift, or are
not decreasing during either STATIC lower.
It may be possible to cause this problem by repeatedly opening and closing the UP or DOWN -
switch during the STATIC phases.
4.3-28 Flash Code F31:Reject Curve
1. The DYNAMIC pressure curve is unacceptable.
An initial pressure peak when the platform lifted cannot be found between 0% and 15% height. -
Check the pressure sensor and lift cylinder hydraulics.
4.3-29 Flash Code F32:Reject Curve
1. The DYNAMIC pressure curve is unacceptable.
There should be a lowest pressure about halfway through the lift (ie: near 50% height); the -
lowest pressure measured is at too low a height. Check the pressure sensor and lift cylinder
hydraulics.
4.3-30 Flash Code F33:Reject Curve
1. The DYNAMIC pressure curve is unacceptable.
There should be a lowest pressure about halfway through the lift (ie: near 50% height); the -
lowest pressure measured is at too high a height. Check the pressure sensor and lift cylinder
hydraulics.
4.3-31 Flash Code F34:Reject Curve
1. The DYNAMIC pressure curve is unacceptable.
There is not enough difference between the initial pressure peak and the minimum pressure. -
Check the pressure sensor and lift cylinder hydraulics.
4.3-32 Flash Code F40:Reject Delta
1. This message indicates that there is not enough difference between the loaded & empty pressure.
This message could also occur if the wrong pressure sensor was fitted (eg: a 5000psi sensor when a
2000psi one is needed)
This message could occur if the platform were not properly loaded during the STATIC LOADED phase,
or if the platform were not properly empty during the STATIC EMPTY phase.
Check CALIBRATIONS / HEIGHT CALS; the “Height” indicates the first height at which there -
was insufficient difference and the “Up” and “Down” values show the loaded pressure (first)
and the difference between loaded and empty pressure (second).