Error 303 is an indication the load beam either experienced a weight beyond 2000g or a physical shock, such as a portafilter or tamper dropping on the scale. Depending on the damage experienced, you may be able to recalibrate the scale using three 500g calibration weights. If you do not have weights available and are located in the U.S., we can perform the calibration for a service fee of $17. If you are outside the U.S., we can put you in contact with a local distributor to assist with the calibration.
If the damage to the load beam is severe, we can offer a refurbished scale in exchange for the damaged unit and a refurbishing fee.
Contact our customer support (email@example.com) and let us know where you are located.