Compressor turning on by itself

[lyo]

My Daikin split system's outdoor compressor is spontaneously turning itself on when the unit is switched off inside. Any ideas?

[passandscore]

The off switch seems faulty. :D

[monkey spanners]

Is it the compressor or just the ourdoor fan? What are the temperatures like where you are? System history, how long has it been installed? Was it fitted professionally?

Remember hearing some units will run the outdoor fan if a pressure sensor reads abnormally high condenser pressure, am not expert on daikin though...