Xiaomi Robot Vacuums Error Codes

Error 1

Robot vacuum reports 'Error 1' / voice prompt 'Error 1: Laser distance sensor error' and stops cleaning, often at startup or when mapping.

LDS (Laser Distance Sensor) Obstruction or Failure

Error 10

Robot vacuum reports 'Error 10' / voice prompt 'Error 10: Stuck in place' and cannot free itself, often in tight spaces.

Robot Chassis Stuck or Ground Clearance Issue

Error 11

Robot vacuum reports 'Error 11' / voice prompt 'Error 11: Battery error' and will not start cleaning or shuts down quickly.

Battery Pack Fault or Protection Triggered

Error 12

Robot vacuum reports 'Error 12' / voice prompt 'Error 12: Charging error' and cannot charge properly on the dock.

Charging Contact or Dock Power Fault

Error 13

Robot vacuum reports 'Error 13' / voice prompt 'Error 13: Internal error' and refuses to start cleaning.

Internal Mainboard or Firmware Fault

Error 14

Robot vacuum reports 'Error 14' / voice prompt 'Error 14: Sensor error' and stops, often soon after starting.

General Sensor Bus or Obstacle Sensor Failure

Error 15

Robot vacuum reports 'Error 15' / voice prompt 'Error 15: LDS communication error' and cannot map or navigate.

LDS Communication or Power Fault

Error 16

Robot vacuum reports 'Error 16' / voice prompt 'Error 16: Device tilted' even when on a flat floor.

Tilt Sensor or IMU (Inertial Measurement Unit) Error

Error 17

Robot vacuum reports 'Error 17' / voice prompt 'Error 17: Localization failure' and cannot find its position on the map.

Navigation Localization Failure

Error 18

Robot vacuum reports 'Error 18' / voice prompt 'Error 18: Fan speed error' or similar, with unstable suction.

Fan Speed Control or Tachometer Error

Error 19

Robot vacuum reports 'Error 19' / voice prompt 'Error 19: Docking error' and cannot return to the charging dock.

Docking Alignment or IR Beacon Detection Failure

Error 2

Robot vacuum reports 'Error 2' / voice prompt 'Error 2: Main wheel error' and stops, often stuck on thresholds or carpets.

Drive Wheel Stall or Height Sensor Error

Error 20

Robot vacuum reports 'Error 20' / voice prompt 'Error 20: Water tank error' on mopping-capable Xiaomi models.

Water Tank Detection or Pump Error

Error 21

Robot vacuum reports 'Error 21' / voice prompt 'Error 21: Filter error' or 'Filter missing' even when a filter is installed.

Filter Presence or Airflow Sensor Error

Error 22

Robot vacuum reports 'Error 22' / voice prompt 'Error 22: Overcurrent protection' and shuts down during cleaning.

Motor Overcurrent or Short Circuit Protection

Error 23

Robot vacuum reports 'Error 23' / voice prompt 'Error 23: Wi‑Fi error' and cannot connect to the Xiaomi Home app.

Wi‑Fi Module or Antenna Fault

Error 3

Robot vacuum reports 'Error 3' / voice prompt 'Error 3: Cliff sensor error' and refuses to move or backs up repeatedly.

Cliff / Anti-Drop Sensor Blocked or Faulty

Error 4

Robot vacuum reports 'Error 4' / voice prompt 'Error 4: Bumper error' and stops, often after hitting an obstacle.

Front Bumper Stuck or Bumper Switch Failure

Error 5

Robot vacuum reports 'Error 5' / voice prompt 'Error 5: Side brush error' and stops, usually shortly after starting.

Side Brush Motor Stall or Overload

Error 6

Robot vacuum reports 'Error 6' / voice prompt 'Error 6: Main brush error' and stops, often with tangled hair in the brush.

Main Brush Stall or Overcurrent

Error 7

Robot vacuum reports 'Error 7' / voice prompt 'Error 7: Wheel stuck' and cannot move or turns in circles.

Drive Wheel Obstruction or Encoder Fault

Error 8

Robot vacuum reports 'Error 8' / voice prompt 'Error 8: Fan error' and stops, suction is weak or absent.

Vacuum Fan Motor Failure or Blockage

Error 9

Robot vacuum reports 'Error 9' / voice prompt 'Error 9: Dustbin missing or not installed correctly' even when the bin is in place.

Dustbin Presence Switch or Sensor Error

Symptom

Robot vacuum does not detect or avoid virtual walls / no-go zones set in the app.

Map-Sync or Software Control Issue

Symptom

Robot vacuum does not pick up fine dust along walls and corners, leaving a visible edge of dirt.

Side Brush Inefficiency or Misalignment

Symptom

Robot vacuum does not return to the dock automatically at the end of cleaning, even though the dock is powered.

Dock Homing or Navigation Behavior Issue

Symptom

Robot vacuum does not start cleaning at scheduled times, but can be started manually.

Scheduling or Clock Configuration Issue

Symptom

Robot vacuum drags the mop pad on carpets even when set to avoid carpets during mopping.

Carpet Detection or Mopping Mode Misconfiguration

Symptom

Robot vacuum frequently gets stuck on carpets, thresholds, or floor transitions without showing an error code.

Insufficient Ground Clearance or Traction

Symptom

Robot vacuum is very loud during operation, with rattling or grinding noises from the bottom.

Mechanical Noise from Brush or Fan Assembly

Symptom

Robot vacuum leaves hair wrapped around wheels and brushes frequently, causing drag and reduced performance.

Hair Accumulation on Rotating Parts

Symptom

Robot vacuum leaves streaks of water, puddles, or uneven wet patches when mopping.

Water Flow Control or Mop Pad Saturation Issue

Symptom

Robot vacuum leaves visible dust lines and poor pickup, especially along edges and on carpets, but no error code is shown.

General Suction Loss or Airflow Restriction

Symptom

Robot vacuum maps rooms incorrectly or creates distorted maps, overlapping walls, or missing areas.

Mapping Inaccuracy or Sensor Interference

Symptom

Robot vacuum randomly reboots or shuts down during cleaning without any specific error code.

Power Interruption or Overheating Shutdown

Symptom

Robot vacuum smells like burning dust or hot plastic during operation, but continues to run.

Overheating Motor or Electrical Component

Symptom

Robot vacuum's bumper feels stiff on one side and does not depress evenly, causing frequent false collisions.

Front Bumper Mechanical Binding

Symptom

Robot vacuum's cliff sensors cause it to avoid dark rugs or black tiles as if they were drop-offs.

Cliff Sensor False Positive on Dark Surfaces

Symptom

Robot vacuum's dustbin fills very quickly and the filter clogs after a short cleaning session.

High Dust Load or Inadequate Pre-Filtration

Symptom

Robot vacuum's LDS turret or top sensor dome is visibly tilted or loose, and navigation is erratic.

LDS Turret Mechanical Misalignment

Symptom

Robot vacuum's wheels slip and spin on smooth or wet floors, causing poor navigation.

Loss of Traction on Drive Wheels