Hi the answer to your problem is fault code 06 relates to your anti creep unit is not functioning properly
And considering its quite random i would most probably say it is pencil switch ZP which is your relevel one im sure its a normally open switch.
If not that check down slowing/stopping pencil i think is RFS
What happens is the switch doesnt work properly on a run/or relevel it causes a channel on anticreep to tell main board theres a fault and will then home to ground and sit out of service.
This threads been up for a while so its probably been sorted by now if not hope this helps.
Danny W
21st century lifts ltd
