Power light on Time Capusle periodically changes to flashing orange
I normally leave my Time Capsule turned on 24/7. About once a week or so, for no reason that I can figure out, the light changes to flashing orange (though the wireless network that runs through the TC still seems to function properly, I can still connect to the Internet and browse or receive/send emails). If I power down than back up after a few seconds, the TC reboots and returns to green. Where it remains until the next occurrence a week or two later. And repeat.
Is this something I should be concerned about? Does the TC need repair or replacement because of this?
MacBook Pro (Retina, 15-inch, Late 2013), iOS 8.1.3