We installed a BurCam easy flush system in our basement this past summer and it WAS working great, until we started getting a septic / sewer smell.
It overflowed once and seaped out beneath the toilet.
The plumber that installed unit made an adjustment to the pump so that the pump would activate with two flushes instead of six.
We then replaced the wax seals and thought we solved the problem.
We are still experiencing that awful smell which forces us to air out the basement all the time.
Could the wax seals not be working?
Does the pump need to run longer than a few seconds?