Fault Codes on VESC Controllers & BMS

How to Find the Fault Code on your Device

Fault codes can be seen by connecting the device through the VESC Tool.

If the device supports the RGB power switch, the fault code can also be recognised by counting the number of flashes.

To look up the fault code in the VESC Tool follow the instructions below:

Go to the “Terminal” tab at the top of the screen and click “Print Faults”.
Alternatively go to the “VESC DEV Tool” section from the menu.
Type in the VESC terminal “faults”.
Press the “Send Command” button which will list the faults on the device in the terminal.

See the list of fault codes for VESC Controllers below:

Number	Fault Code
0	None
1	Over Voltage
2	Under Voltage
3	DRV
4	Absolute Over Current
5	Over Temp FET
6	Over Temp Motor
7	Gate Driver Over Voltage
8	MCU Under Voltage
9	Booting from Watchdog Reset
10	Gate Driver Under Voltage
11	Encoder SPI
12	Encoder Sincos Below Min Amplitude
13	Encoder Sincos Above Max Amplitude
14	Flash Corruption
15	High Offset Current Sensor 1
16	High Offset Current Sensor 2
17	High Offset Current Sensor 3
18	Unbalanced Currents
19	BRK
20	Resolver LOT
21	Resolver DOS
22	Resolver LOS
23	Flash Corruption App Config
24	Flash Corruption MC Config
25	Encoder No Magnet
26	Encoder Magnet Too Strong
27	Phase Filter
28	Encoder Fault
29	LV Output Fault

See the list of fault codes for VESC BMS below: