I have also noticed my Aircom T-10 turns on as well with my 7000x. I think being covered by a fan and somewhat on in standby mode it builds a little heat. I am not worried about it at all especially because even when I'm watching a very loud movie it barely gets warm to the touch without a fan. I absolutely love the sound of this amp for the price.
Marantz SR57012,Panamax Power Conditioner, Rega P2 Turntable, Fronts - B&W 684 S3's, Center - B&W LCR600 S3, Surrounds - PSB Alpha, SVS SB4000 Sub woofer, LG 55" 4K LED Screen., SVS Speaker Cable.