The rotary switch is set to the "Control panel" position: The safety grid is open: The "Pumping" mode was turned on when the control unit was started via a signal: The vehicle's gearbox is not in gear, the engine is not running: Stroke potentiometer is set to "0": Emergency stop is activated: Hydraulic oil is too hot: No supply pressure: Reducing solenoid valve is faulty: Stroke solenoid valve faulty: Electronic control unit is faulty
Switch the rotary switch to the control panel and start the control unit with a signal. Close the safety grille. Turn off the pump and turn it on again. Shift into gear and start the engine. Set to a higher value Unlock the emergency stop and trigger the control unit with a signal. Cool down the hydraulic system. Check the suction and high-pressure filters and replace if necessary. The service department is allowed to check and replace the valve