Form the main menu go to ''CHANGE DEFAULT'' then press 5454 & YES key (passwoed to access default option).Once you enter to default menu,go to "SCALE CALIBRATION" & press YES key.now follow the on screen text.Hope this will solve your problem. NOTE:you should have 9KG/20LBS of weight for scale calibra
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Form the main menu go to ''CHANGE DEFAULT'' then press 5454 & YES key (passwoed to access default option).Once you enter to default menu,go to "SCALE CALIBRATION" & press YES key.now follow the on screen text.Hope this will solve your problem.
NOTE:you should have 9KG/20LBS of weight for scale calibra
Access code for Robinair 34788/34788i is 2200. hope this will help you.
and the service menu of the 347002k?