46 EOC-BA-e-16109 Servicing, maintenance, disposal9.1 Cleaning• Before cleaning, disconnect the appliance from the operating voltage.• Do not use aggressive detergents (solvents or similar).9.2 Servicing, maintenanceThe appliance may only be opened by trained service technicians who are authorizedby KERN.Before opening, disconnect from power supply.9.3 DisposalDisposal of packaging and appliance must be carried out by operator according tovalid national or regional law of the location where the appliance is used.9.4 Error messagesError message DescriptionOverload, the mass exceeds the weighing range with+9 dToo low mass (below -20 d)The zeroing range has been exceeded after turning thescales on or pushing buttonZeroing of unloaded scales with the use ofpushbuttonNo load or negative value while determining thenumber of pieces and percentage weighingTotalizingTotal number of weighing over 999TotalizingTotal mass over 999999Battery capacity will soon be exhausted (batteryvoltage below 5.7 V, with the value below 5.4 V thenautomatic turning off takes place)Should other error messages occur, switch balance off and then on again. If the errormessage remains inform manufacturer.