PETKIT Purobot Ultra Troubleshooting

Likely causes

• The roll is loaded in the wrong orientation.
• A third-party roll is being used and the perforation spacing does not match.
• The roll is near its end and the remaining film is too short to grip.

Fix it, in this order

1. Reload the roll. Follow the diagram inside the bay exactly — orientation is not obvious and reversed rolls are the most common cause.
2. Use PETKIT rolls. Third-party film is the most common cause of intermittent sealing failures on these units.
3. Reset the roll counter. After fitting a new roll, reset the counter in the app so the remaining-bag estimate is correct.

Likely causes

• Lighting is too low. The camera needs usable ambient light to distinguish coats.
• The cats look alike and the profile has too few training images.
• The lens is dusty.

Fix it, in this order

1. Add light. A cheap plug-in nightlight near the unit measurably improves identification.
2. Add training images. Feed the app more images of each cat, including from behind and above — the angle the camera actually sees.
3. Clean the lens. Litter dust films the lens within weeks. Wipe monthly with a dry microfibre cloth.

Likely causes

• Too much litter. Overfilling past the fill line is the single most common cause of a failed cycle.
• A clump has welded to the sifting screen or the drum wall and is jamming rotation.
• The waste drawer is not seated fully, so the safety interlock keeps the motor disabled.

Fix it, in this order

1. Check the litter level. Litter should sit at or just below the marked fill line. If in doubt, remove a cup and try again.
2. Reseat the drawer. Pull the waste drawer fully out and push it back until it clicks. A drawer that is 5 mm proud will stop the cycle.
3. Clear the screen. Power off, remove the globe or drum, and scrape any welded clumps off the sifting screen with a plastic scraper.
4. Run an empty test cycle. With the litter removed, run one cycle. If it completes empty and fails when loaded, the problem is litter or weight, not the motor.

Likely causes

• The unit is not on a level floor. Weight sensing assumes level.
• Litter has been added or removed without re-taring, so the baseline is stale.
• Something is resting against the unit — a wall, a mat edge, a cable — and taking part of the load.

Fix it, in this order

1. Level it. Use a phone level on the base. Even a small tilt on an uneven floor throws readings off by a pound or more.
2. Re-tare after every litter change. Run the calibration or re-zero routine in the app whenever you add or fully change litter.
3. Give it clearance. Leave two inches around the unit and keep it off thick rugs, which flex under load.
4. Separate similar cats manually. Weight-based identification cannot reliably separate two cats within about a pound of each other. Tag visits by hand if that is your situation.

Likely causes

• The box is on a 5 GHz network segment. Almost every litter box on the market is 2.4 GHz only.
• The router moved the unit to a different band after a firmware update or a mesh node reshuffle.
• The box sits behind an appliance or in a metal-lined cabinet that kills the signal.

Fix it, in this order

1. Check the band. Confirm your phone is on the 2.4 GHz network when you pair. On a combined-band router, temporarily split the bands or use the guest 2.4 GHz network.
2. Power cycle in order. Unplug the box for 30 seconds, then reboot the router, then plug the box back in. Order matters — the box looks for the network on boot.
3. Move it 3 feet. Signal strength at floor level behind a washing machine is far worse than it looks. Try the unit in the open before concluding the radio is faulty.
4. Re-pair from scratch. Remove the device from the app entirely, then run setup again rather than retrying the existing entry.

Likely causes

• Phone is on 5 GHz while the box needs 2.4 GHz.
• The Wi-Fi password contains characters the unit rejects, or the network name is hidden.
• Location or local-network permission is denied to the PETKIT app, so it cannot see the device.

Fix it, in this order

1. Grant the permissions. Both Location and Local Network permissions must be allowed for pairing to work on iOS. Android needs Location.
2. Use a simple 2.4 GHz SSID. Broadcast a plain, visible 2.4 GHz network with an alphanumeric password for setup. You can move it afterwards.
3. Stay within six feet during pairing. Pairing uses a short-range handshake before the box joins the network.

Likely causes

• The carbon filter is past its life. Filters degrade quietly; there is no warning.
• The drawer gasket has litter dust on the seal face, so the drawer no longer closes airtight.
• Litter depth is too shallow, so urine reaches the drum wall instead of clumping.
• The unit needs a full wash. Waste film builds on the drum wall and no amount of cycling removes it.

Fix it, in this order

1. Replace the filter. Set a recurring reminder rather than waiting to notice. PETKIT filters are a running cost, not an optional accessory.
2. Clean the gasket. Wipe the drawer seal and the mating face with a damp cloth, then dry. A gritty seal leaks.
3. Deepen the litter. Run to the fill line, not below it. Shallow litter is the most common cause of odor in an otherwise healthy unit.
4. Full wash every 4-6 weeks. Strip the unit, wash the drum and drawer with unscented soap and warm water, dry completely before reassembly.