Applicable to Stunner, Stunner X, Juggernaut Classic models.
The following is the firmware update procedure to fix ERR07:
Step 1: Get a USB programming cable. One like this:
Step 2: Download STC-ISP-15xx-v6.83.exe application software attached to this article below.
Step 3: Download the CRR1094824E010015.3_170815.hex file attached with this article below.
Step 4: Plug USB into the computer and the other end into the motor wiring harness (where the display plugs in) For detailed instruction see the video here -
Make sure that the 52V battery is connected to the bike.
Step 5: Right Click and Open the STC application as an Administrator:
Ensure this MCU on the program window
Also, ensure these;
- Select the correct COM port
- Set Max Baud 57600
- Set Input IRC frequency to 18.432MHz
- Click "Check MCU"
Disconnect & Reconnect the battery and the left bottom section should update to this message:
If you get an error, check COM port and repeat step 4-6
Step 7: Click Open Code File
Step 8: Load the CRR1094824E010015.3_170815.hex file that you downloaded
Step 9: Click Download/Program
It will load the new firmware. If the status window on the bottom left is stuck at "Checking target MCU" like below, disconnect the 52V battery and reconnect to motor.
The process should complete as shown by a green status bar in the bottom:
If everything went well, you'll see a message like this:
If not, contact us but repeat steps 3-7 :)