To test the water pump, hold down the minus (-) and plus (+) buttons simultaneously on the digital display. When you release the buttons, the test stops and it returns to the automatic cycle. Note that you must have water in the water tank when you have the machine running. In the automatic cycle, the water pump works for 15 minutes, then rests for 45 minutes, in 24 hour cycle. The bike will be activated when you click the on button the first time. The water pump starts after 2 hours the first time. When you click the off button, and the machine shuts down, the machine will restart automatically after 12 hours. To stop the machine completely, pull out the power plug.