robot just beeps three times and won't dock to charge, it's just bumping into the dock

Diagnosis

The three-beep error sequence on the Roborock Q Revo MaxV indicates a "Homing Failure." This occurs when the robot can see the docking station's general location via LiDAR but cannot "lock on" to the specific infrared (IR) beacon emitted by the dock. Because the MaxV relies on a precise triangulation of IR signals to align its charging pins, any interference in the signal path causes the robot to overshoot the dock or bump into it blindly without initiating the docking sequence. This is typically caused by a layer of fine dust, smudge marks, or "film" buildup on the IR receivers located on the front bumper of the vacuum or the IR emitters on the docking station. In some cases, high-intensity sunlight hitting the dock directly or highly reflective flooring (like polished black marble or mirrored tiles) can "blind" the sensors, creating a signal noise that prevents the robot from calculating the exact distance to the charging pins.

How to Fix It

Follow these exact steps to restore the homing signal and ensure a successful dock connection:

1. Power down the Roborock Q Revo MaxV by holding the power button until the LED ring goes dark.
2. Locate the dark, semi-transparent plastic window on the front bumper. Use a clean, dry microfiber cloth to wipe this area. Avoid using glass cleaner or chemical solvents, as these can leave a streaky residue that refracts the IR signal.
3. Inspect the docking station's front panel. Locate the two small, circular IR emitter windows. Use a cotton swab dipped in 70% isopropyl alcohol to gently remove any dust or grime from these lenses. Let them air dry for 30 seconds.
4. Check the charging contact pins on both the bottom of the robot and the dock. If you see a dull gray or black oxidation layer, use a pencil eraser to gently scrub the gold-plated contacts until they are shiny.
5. Reposition the dock. Ensure it is flush against a flat wall. Verify there is a minimum of 1.5 meters (5 feet) of clear space in front of the dock and 0.5 meters (1.6 feet) of clear space on either side. Remove any rugs or mats that might be causing the robot to tilt slightly as it approaches, which misaligns the IR sensors.
6. Restart the robot and trigger the "Dock" command via the Roborock app to test the connection.

If That Didn't Work

• Relocate the Dock: If your dock is placed in a spot with direct sunlight (especially during mid-day), the IR sensors will be overwhelmed by ambient light. Move the dock to a shaded area or a different wall and test again. IR signals are easily disrupted by UV rays.
• Check for "Ghost" Obstacles: Ensure there are no floor-length curtains, thin cables, or dark-colored furniture legs within 2 meters of the dock. The MaxV's Reactive AI obstacle avoidance may be detecting a "phantom" object, causing it to veer slightly off course and miss the IR beacon.
• Hard Reset the Logic Board: Perform a soft reset by holding the Home and Spot Clean buttons simultaneously for 5 seconds. This clears the temporary cache of the navigation system and forces the robot to re-map the dock's exact coordinates.
• Inspect the Bumper Spring: Gently press the front bumper to ensure it clicks back into place instantly. If the bumper is stuck or partially depressed due to a small pebble or debris, the IR sensor may be physically misaligned, preventing a straight-on approach.

Heads Up

• Avoid Dark Rugs: Placing the dock on a high-pile dark rug can cause the robot to "climb" slightly, changing the angle of the IR receiver and causing it to miss the dock. Always place the station on a hard, level surface.
• Monthly Sensor Maintenance: Make it a habit to wipe the front IR window and dock emitters every 30 days. Dust accumulation is the #1 cause of docking failures in the Q Revo series.
• Pin Corrosion: If you notice the robot docks but doesn't charge, check for "pitting" on the gold pins. If the pins are recessed or pushed in, the robot will bump the dock but fail to establish an electrical connection.
• Firmware Sync: Ensure your device is running the latest firmware via the app. Roborock frequently releases "docking logic" updates that improve the IR triangulation accuracy for the MaxV models.