To reduce the risk of electric shock, turn power switch off and disconnect plug from electrical outlet before performing maintenance or troubleshooting checks. Bissell Robot Vacuum Cleaner – LED Error Code (power LED flashes red) Error Codes Solution E1 The wheel is stuck. Remove vacuum from obstacles, and restart the power switch. E2 The top cover or dust bin is not installed properly. Install the top cover and dust bin properly. The unit will detect the error and fix automatically. If the unit does not fix automatically, turn the unit off and back on. E3 The bumper is stuck. Remove vacuum from obstacles. The unit will detect the error and fix automatically E4 The unit was lifted up from the floor. Put vacuum back on the floor. E5 The color of the floor is too dark Remove robot from the flooring. Use virtual wall to keep the robot off of the flooring. E6 The battery is not installed properly. Charging error. (Power switch is off) To install the battery properly, please refer to ...