Worked on this unit more today. I'm pretty confident that this system doesn't store fault codes. Just displays them when the fault happens. I could be wrong, but I can't find any area in the system that shows any stored fault codes. Got the unit to fail while lowering and travel with fault code FH (battery voltage out of range). But, never while lifting. Did load test the battery earlier this week and today with same results, voltage drop to around 21.4 volts. Checked for shorts to the frame ok and static strap good. Has anyone experienced anything close to this? Bad battery?