My Z-E2026 does not show any A/C status info. Is my device defective?

AW1: A/C status display integration is only provided for, when function specific data packages are present in the vehicle CAN. The “small” (manual) A/C system does not provide vehicle integration.
AW2: It may be that this function disabled in the Setup menu. Therefore please check if this feature is active: (System Settings> CAR> AC Info> ON). Note that not all vehicles provide this information available, specifications vary with vehicle model, model year and selection of optional equipment.