Failed Bit 12 - Debris Sensor - iRobot Roomba Scheduler Service Manual

Brush Motor, Gearbox, Shaft
o Ensure BiT passes with returned or replaced
brushes
o Verify the string is attached to the chassis
Failed BiT 12 – Debris Sensor
Roomba Symptom: Roomba's blue light never
comes on in a dirty environment.
Verify the debris sensor is not covered in dirt.
If it test still fails replace main brush assembly.
Output Gears
Main Brush Assembly
27