Common Issues
There is no CO2 flowing through the system. Check the flow regulator on the CO2 cylinder. The CO2 cylinder may need replacing/filling. Check the injector for clogs or damage. Check all tubing connections.
The flow rate will not increase. The injector may be clogged or have a limit for flow rate. The CO2 cylinder may be low.
Electricals
The switch does not activate the valve. Check the power source. Use an alternate power source. Check the wiring inside the unit for loose connections.