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Color Display error codes

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The following error codes may appear on ebike models with color displays:

Radster Trail
Radster Road
RadExpand 5 Plus
RadWagon 5

Use the table below to identify and troubleshoot error codes that may appear on your display.

Error code	Description	Troubleshooting
6	Battery undervoltage error This error indicates the battery is operating under the voltage requirements. This error is very uncommon, but could occur if the battery is operating at a very low state of charge.	Charge battery to full.
10	Battery overvoltage error This error indicates the battery is operating outside of voltage requirements. This error is very uncommon, but could occur if using a third-party battery, or there is a problem with the controller.	Restart ebike, and always use Rad Power Bikes-approved batteries.
12	Motor stall warning This error occurs when you are twisting the throttle but the motor is not responding, e.g. using throttle lightly instead of coming to a complete stop on a hill, or twisting throttle while brakes are applied.	Restart ebike to reset controller, and avoid using throttle in place of braking.
15	Torque sensor error This error indicates a torque sensor failure or abnormal signal from the torque sensor.	Unplug the torque sensor connector from the controller and check for any damage or moisture, and verify that the cable between the throttle and wiring harness is not damaged. Plug the connector back in and power on the bike to see if the issue is resolved. Refer to the Error 30 / Connector Check article for your ebike model for help identifying the torque sensor cable location on your ebike.
16	Controller error This error indicates an internal failure in the controller.	Restart ebike to reset controller. If you still get the error, perform a connector check to isolate what component may be causing the error.
17	Throttle on at startup This error is typically caused when the throttle is engaged when the ebike is powered on.	Release the throttle when the ebike is powered on.
21	Abnormal motor current This error occurs when the controller senses abnormal current through the motor and shuts the ebike down.	Power down the ebike for awhile to allow the motor to cool.
22	Throttle fault This error is typically caused by a fault in the throttle or wiring harness due to damage or moisture.	Unplug the throttle connector on the front of the ebike and check for any damage or moisture, and verify that the cable between the throttle and wiring harness is not damaged. Plug the connector back in and power on the bike to see if the issue is resolved.
23	Motor phase fault This error typically occurs when the motor detects abnormal current patterns, e.g. too much heat current from hill climbing causes the ebike to shut down, or a faulty controller.	Power down the ebike for awhile to allow the motor to cool. If the problem persists even when not climbing hills, contact our Product Support team for further assistance.
24	Motor hall fault This error typically indicates a connection problem between the motor and controller.	Unplug the motor cable between the motor and controller (mounted on the chain stay) and check for any damage or moisture, and verify the motor cable is not damaged anywhere. Plug the connector back in and power on the bike to see if the issue is resolved.
25	Brake switch fault This typically indicates that a brake lever is being held when the ebike is powered on.	Release the brake lever when the ebike is powered on.
30	Communication error This error indicates a communication error between the controller and display, which can be the result of anything from a loose connector somewhere on the ebike, a damaged electrical cable, or a faulty controller.	Refer to the Error 30 / Connector Check article for your ebike model for detailed troubleshooting steps to isolate the issue.
34	Stuck button error This typically indicates one or more of the buttons on the remote is being held down when the bike is powered on, or is stuck in position.	Release the power button on the remote once the ebike begins powering on. If any of the remote buttons appear to be stuck in position, carefully dislodge the button and check for any damage or debris which may be interfering with remote operation.