Avoid overheating of the HP pump
Never leave the HP washer work in closed circuit during more than 2 minutes.
Here are some solutions :
Return to buffer tank
After releasing the trigger of the spray gun, the regulator sends the water back in the buffer tank.
Total stop (Automatic Start/Stop)
After releasing the trigger of the HP spray gun, the engine stops.
Time delayed automatic Start/Stop
After releasing the trigger of the HP spray gun, the engine continues to work during the time set, then stops. This avoids too many starts.