Identification on uP: V1.0/V1.1/V2.0/V2.1/V3.0 Hotel Mode activation: - Select program 38, then press MENU on local keyboard and SLEEPTIMER (or OSD) on remote control for at least 4 seconds (at activation a H+ is displayed (to remove this H+ switch off/on the set)). Specification of the Hotel mode: - Max. volume in hotel mode is the volume present when activating the hotel mode: STORE or INSTALL can not be entered (else 3 seconds LOCKED). Delta volume can not be entered. PP can not be stored. Always program number 1 at switch on. κοιτα αυτο απο το service manual( σου στελνω το σχεδιο).