If you are getting a level error fault the accelerometer module mounted directly behind the display is bad. According to Draka they have premature epoxy curing problems during the manufacturing process. Had about 10 we had to replace and no problems since. The older units were also not "fail-safe" when power was lost completely, i.e. battery and line dead, the unit would not put the elevator into EQ mode. They remedied this with powered contacts that are N/O and are closed during normal operation and open with a loss of power.
