Skyjack SJIII 3226 Service Manual page 105

ection 4 - Troubleshooting Information
Load ensing ystem - CE (Continued)
4.3-26 Flash Code F27:Bad Height
1. his message indicates a problem with the height sensor output (P4-3) during the S A IC phases.
- he height sensor output must be between 1.0V and 4.0V at all times. Check DIAGNOS ICS /
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. his message indicates that the recorded heights are not increasing during either S A IC lift, or are
not decreasing during either S A IC lower.
- It may be possible to cause this problem by repeatedly opening and closing the UP or DOWN
switch during the S A IC phases.
4.3-28 Flash Code F31:Reject Curve
1. he 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. he DYNAMIC pressure curve is unacceptable.
- here 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. he DYNAMIC pressure curve is unacceptable.
- here 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. he DYNAMIC pressure curve is unacceptable.
- here 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. his message indicates that there is not enough difference between the loaded & empty pressure.
his message could also occur if the wrong pressure sensor was fitted (eg: a 5000psi sensor when a
2000psi one is needed)
his message could occur if the platform were not properly loaded during the S A IC LOADED phase,
or if the platform were not properly empty during the S A IC EMP Y phase.
- Check CALIBRA IONS / HEIGH 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).
JIII Conventional eries
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ervice and Maintenance
KYJACK, Page 19