RJN8,
Code FO

Possible causes:
- Drive motor current limit potentiometers P3 and P4 out of adjustment.
- Programmable feature '8' set to 1 with truck in a ramp application.
- Programmable feature 'a' or '4' set too low for the application.
- Excessive drive motor current due to severe ramps, abuse, or misapplication.
- Current shunt defect:logics defect.

Checks
- Check right current shunt and wires 42 and 29 and connection P2-11 and P2-7 at the logices board.
- Check left current shunt and wires 43 and 25 and connections P2-13 and P2-8 at the logics board.
- Disable programmable feature '8' if ramp application requires more current than set with P3 and P4 current limit potentiometers.
- Determine maximum motor drive current and the time that this current is needed for the application.
- Extend the bypass stall timer. Programmable feature 'A' or the pulsing stall timer. Programmable feature '4' if needed.