I assume you are using the driver. The older pioneer units(first 2-3 generations that had network and older) will turn on with any communication sent to them if they are powered off. The driver is constantly polling the unit based on how the newer units respond(it just returns whether its on or off instead of turning on). Even though they all use the same protocol or 99% of it the older ones responded differently for energy star ratings. I thought I read that the RTI developer that wrote that driver had a work around in the form of an unofficial driver but I have not used it. Try searching on RTI's forums.