I have recently inherited a customer with a futura impulse. The wash is currently down due to an error : "High Pressure Trapped". The manuals provided do not address this error. When a wash is started, the machine makes two presoak passes, as programmed. Then, the high pressure kicks on, runs for about 5 seconds, then cuts off. Then the gantry moves back to its start position and the wash is cancelled. Any ideas what is going on? We saw a leak on the unloader on the high pressure pump and are ordering a new unloader valve. I just want to get this guy's car wash up and running again... It's eating away at me!