LifeSpan Chaser 3 User Manual page 28

Code
E12
28| TROUBLESHOOTING
Reason
Communication failure
Solution
1. Check if the computer top and
bottom wire are properly connected
and without damage. If not,
reconnect the wire or change the
broken computer top and bottom
wire.
2. Check if the control board
communication interface is normal.
3. Change the control board.
4. Check if the computer
communication interface is normal.
5. Change the computer.