Saniflow pump keeps comming on without flushing toilet

Water pressure makes the unit kick on and off. If it's turning on by itself then most likely somehow water is draining back into the pump. It could be leaking water from the toilet tank, to the bowl and from the bowl to the pump. Or the check valve inside the discharge elbow may not be closing all the way down and is allowing waste water to drain back into the pump creating enough water pressure that makes the pump kick on and off. Inspect the flapper on the flush valve and the check valve on the discharge elbow on top of the macerating pump.