Error 22 Moderate Easy DIY

Roborock Robot Vacuum Error 22 — Dock signal sensor dirty

Roborock Robot Vacuum · Error code Error 22

What Error 22 Means

The front IR receiver the robot uses to find the dock is dirty or blocked. It can clean fine but may not be able to return to charge.

Symptoms

  • Voice prompt 'Dock signal sensor is dirty'
  • App shows Error 22
  • Robot can't find dock
  • Cleans normally but stops in a random spot when finished

Common Causes

1
Dust or smudge on front IR window

Receiver on the bumper accumulates dust.

2
Sticker or film over sensor

Original packaging residue.

3
Dock IR transmitter blocked

Object in front of the dock blocking line-of-sight.

How to Fix It

  1. Wipe the front IR window on the robot with a dry microfiber cloth.
  2. Wipe the front face of the dock where the IR transmitter is.
  3. Move any objects within 3 feet on either side of the dock.
  4. Ensure 1.5 feet clearance on each side and 5 feet in front of the dock.
  5. Send the robot to dock from the app to test.

More Roborock Robot Vacuum Codes

Error 1 Error 1 — LDS laser distance sensor blocked or stuck Error 10 Error 10 — Filter blocked Error 11 Error 11 — Magnetic strip / no-go interference Error 12 Error 12 — Battery low, returning to dock Error 13 Error 13 — Charging error / contacts dirty Error 14 Error 14 — Battery error

All Roborock codes → All robot vacuum codes →

Verified against manufacturer documentation: global.roborock.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.