User manual
CPB-N / CPB-DM-BA-e-1323 
47 
14 Service, maintenance, disposal 
14.1  Cleaning 
Before cleaning, please disconnect the appliance from the operating voltage. 
Please do not use aggressive cleaning agents (solvents or similar agents), but a 
cloth dampened with mild soap suds. Ensure that no liquid penetrates into the device 
and wipe with a dry soft cloth. 
Loose residue sample/powder can be removed carefully with a brush or manual 
vacuum cleaner. 
Spilled weighing goods must be removed immediately. 
14.2  Service, maintenance 
The  appliance  may  only  be  opened  by  trained  service  technicians  who  are 
authorized by KERN. 
Before opening, disconnect from power supply. 
14.3  Disposal 
Disposal of packaging and appliance must be carried out by operator according to 
valid national or regional law of the location where the appliance is used. 
14.4  Error messages 
Error message 
Description 
Err 4 
Zero range exceeded 
Err 5 
Invalid entry 
Err 6 
Damaged electronics 
Err 9 
Weighing result unstable 
Should other error messages occur, switch balance off and then on again. If the error 
message remains inform manufacturer. 










