Robot vacuum displays E12 and stops; often related to overcurrent or overload on one of the motors (brush, fan, or wheels).

Safety first: Turn the robot OFF and remove it from the dock.

• 1. Inspect all moving parts: Check main brush, side brush, wheels, and fan inlet for any obvious obstructions. Clear all debris as described in the specific component procedures.
• 2. Let it cool: If the robot feels warm, allow it to rest powered OFF for at least 20 minutes to let the motor drivers cool.
• 3. Restart and test: Power the robot ON and run a short cleaning cycle on a hard floor, listening for any motor struggling or abnormal noise.
• 4. Isolate the fault: If possible, remove the main brush and side brush and test again. If E12 disappears, the issue is with one of those assemblies. If it remains, suspect a wheel or fan motor.
• 5. Inspect main board (advanced): Open the robot and look for burnt components or discoloration near the motor driver ICs on the main PCB.
• 6. Replace failing motor or main board: Once the faulty motor is identified, replace that motor module. If multiple motors test good but E12 persists, the main control board may need replacement.

Warning: Repeatedly resetting and running with a jammed motor can permanently damage the main board.