Hi RayTech, my company just bought the Raymond 8210 with keypad option,but is going too slow, so I look to the owner manual to find out the procedure to change the parameter to get a full speed, so I followed the procedure, but when I enter my key code I wait about 10 seconds I got I fault code C 33. Any ideas about the problem please help me the trailer was taking only 30-40 minutes from me, now it take about 2 hours to get done please any help will be Appreciated