17
BF-UM-C-DP C010-EN November 2022
USER MANU
AL FOR DISPL
A
Y
Code
Cause
Troubleshooting
Hub Motor System
Mid Motor System
30
Communication abnormal
3) If the BESST tool is available, con-
nect it with HMI and controller, read
the information of HMI and controller
and replace the part that cannot read
information.
3) If the BESST tool is available,
connect it with HMI and drive unit,
read the information of HMI and drive
unit and replace the part that cannot
read information.
36
ON/OFF Button detection
circuit abnormal
(Only occur when the drive
system is equipped with
Bafang CAN communication
protocol.)
1. If keep pressing the ON/OFF
button when the HMI powers on, the
error code will alarm. Release the
button and observe whether the code
disappears.
2. Troubleshoot the faulty part:
1) Replace the HMI
2) Replace the controller
1. If keep pressing the ON/OFF
button when the HMI powers on, the
error code will alarm. Release the
button and observe whether the code
disappears.
2. Troubleshoot the faulty part:
1) Replace the HMI
2) Replace the drive unit
37
WDT (Watch Dog Timer) in
controller is abnormal
Replace the controller
Replace the drive unit
42
Discharge voltage of
battery pack is too low
1. Charge the battery
2. Replace the battery
49
Discharge voltage of single
cell is too low
1. Charge the battery
2. Replace the battery
4c
Voltage difference between
single cell
Replace the battery
The battery error codes of 42, 49, 4C only occur when the drive system is equipped with the smart BMS and Bafang CAN
communication protocol.
