Error code 68-3 has to do with the SAS/OPS. According to the book, it says that "Lift switch lower SW short abnormality". Possible causes are, connector contact defect, raise lift switch defect, lowering lift switch defect, harness defect, lift switch installation defect, or SAS/OPS controller defect.
i would look at the lift and lower switches first. Do you have the mini levers on this unit?
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