Take the battery out of your remote, then operate the volume by touch, see if it happens again. If it does, problem with the unit, if not, might be time for a new remote...
Repair for a Hegel?
The volume shoots up on it's (Hegel H200) own, and if I don't hit the mute within a second my speakers would be blown. I contacted Hegel and they said their authorized dealer has changed and they referred me to a place where the reviews were pretty spotty. I know it's a long shot, but thought I would ask for feedback anyway. Thanks