Roborock · Robot Vacuum Moderate

Error 22 — Dock signal sensor dirty

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.

Keep using it?
Yes, with caution
DIY difficulty
Easy
Verified against
global.roborock.com ↗

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.

Why it happens

Typical signs: 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

  • Dust or smudge on front IR window Receiver on the bumper accumulates dust.
  • Sticker or film over sensor Original packaging residue.
  • Dock IR transmitter blocked Object in front of the dock blocking line-of-sight.

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 →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: global.roborock.com.