22 MCN-M-SH-e-22206 Maintenance6.1 Service, maintenanceThe appliance may only be opened by trained service technicians who are authorizedby KERN.Disconnect the scales before opening.6.2 Error CodesError message Explanationzerohi Zero too high at power upzerolo Zero too low at power upzlimit Over zeroing rangeUnderZ Under zeroing rangeinstab Unstable weightwrong Adjustment errorlobat Batteries / rechargeable battery exhaustedOver weightUnder weight