Robert,
If the compressor runs with the leveling system turned off, you need to find out what is controlling the compressor circuit, as there is no need for the compressor to run if the leveling system is not functioning.
If it is wired to maintain pressure in a storage tank, there may be a leak in one of the connections to that tank, but if the compressor runs that much, it can run down batteries if it is stored and cause premature failure of the compressor.
It is also possible that the leveling system is activating the compressor when it should not be.
Gerald