Service manual
SKYJACK, Page 17SJIII Series
Section 5 - Procedures Service and Maintenance
F13: Low Height Range
This message occurs at the end of calibration if the height sensor output did not change sufficiently -
to give a reasonably accurate platform height estimate. DIAGNOSTICS / SENSORS can be used to
check the height sensor output (P43) when the platform is fully lowered and fully raised; a difference
of at least 1V is to be expected. This message could occur if the UP switch was accidentally opened
too early (when the platform is not fully raised).
F15: Check Elev
This message is given if the elevation switch (P2-10) is open when the platform has been fully lowered -
at the end of calibration. This message would occur if the DOWN switch was accidentally opened before
the platform was fully lowered. If the platform is fully lowered, check the elevation switch.
F16: Low Elev.open
This message is given if the elevation switch (P2 10) opened during lift at a too low height (below 5%). -
Check CALIBRATIONS / HEIGHT CALS; the “ElevUp” value shows the recorded height where the
switch opened.
F17: High Elev.open
This message is given if the elevation switch (P210) opened during lift at a too high height (above -
25%).Check CALIBRATIONS / HEIGHT CALS; the “ElevUp” value shows the recorded height where
the switch opened.
F18: Low Elev.close
This message is given if the elevation switch (P210) closed during lower at a too low height (below -
5%).Check CALIBRATIONS / HEIGHT CALS; the “ElevDown” value shows the recorded height where
the switch opened.
F19: High Elev.close
This message is given if the elevation switch (P210) closed during lower at a too high height (above -
25%).Check CALIBRATIONS / HEIGHT CALS; the “ElevUp” value shows the recorded height where
the switch opened.
F20: Height<>0%
This message occurs if the platform height is not 0% after the platform has been fully lowered at the -
end of calibration.The platform must return to the same height each time it is fully lowered. Check
DIAGNOSTICS / SYSTEM to check the height.
F28: Bad Height
This message indicates a problem with the height sensor output (P43) during calibration. The height -
sensor output must be between 0.9V and 4.1V during calibration and between 0.4v and 4.6v during
normal operation. Check DIAGNOSTICS / SENSORS to see the output. A reading of 0V or 5V is probably
due to a wiring problem.
F42: Low Pressure
This message indicates that the pressure is too low (0.5V or less) when the elevation switch opens -
during calibration. Check DIAGNOSTICS / SENSORS to check the pressure.
F43: High Pressure
This message indicates that the pressure is too high (4.5V or more) when the elevation switch opens -
during calibration. Check DIAGNOSTICS / SENSORS to check the pressure.