Retrospec KOA REV+ Assembly Instructions Manual page 29

7. Error Codes
When the e-bike electronic control system fails, the display will automatically
display ERROR code. For the definition of the detailed error code, see
Appendix 1 1.
Error Code
21
22
23
24
25
30
31
34
Error Code
Interface
Description
Current abnormal
Throttle abnormal
Motor phase failure
Motor hall abnormal
Brake abnormal
Communication abnormal
Power on/off button adhesion
6km function button adhesion
28