How to fix the Hercules Pump if PSI is not increasing?

How to fix the Hercules Pump if PSI is not increasing?

1. Plug in the electric pump.
2. Press the "start/stop" & "select unit" buttons at the same time. (see picture below)

3. Release the buttons and unplug the pump when the display shows "0"
3. Plug in and restart the pump. Test to see if it works.

Note: Please ensure that the pump is completely charged.