1. Check whether there is dust in the money counter or if there are sundries stuck in it. Remove the cover and remove the dust or sundries.
2. Check whether the banknote counter is irradiated by sunlight or strong light. Strong light may make the purple light of banknote detection falsely report.
3. Check whether there is a strong magnet near the banknote counter. Strong magnetism may cause the magnetic banknote detection function to fail and falsely report.
4. The aging failure of the machine parts can only be replaced and repaired by professionals.