Arrived, stated left platen left Clamshell grill wasn't turning on yesterday, have error 41. checked error logs, has error 41 a,b, and c. indicating loss of 3 phase power. unit is operating right now. unit likely became unplugged and got reseated when customer cleaned behind unit. did pull unit out and inspect plug and outlet, did make sure connections were tight in plug, on contactor in grill. contactor is OK. check voltage to unit and verify UI is reading the voltage correctly. unit is operational. OK for use.