Litter robot 4 sensors

The Whisker Litter-Robot 4 OdorTrap Holder is a uniquely crafted holder that seamlessly integrates with the Litter-Robot 4. It is capable of accommodating up to three OdorTrap Packs, designed to capture and neutralize odors before they permeate the surrounding environment. This holder serves as an effective replacement for the carbon filter ...

Laser and weight sensor technology in Litter-Robot 4 detects cats weighing 3+ lbs for enhanced safety and more accurate activity tracking. Multi-cat friendly. The sleek, compact multi-cat litter box design features a wide opening to maximize cat comfort, providing clean litter for households with up to 4 cats of any breed or size. ...Litter-Robot 4: Use and care. Cleaning your Litter-Robot. It's important to deep clean your Litter-Robot every 3-6 months. Over time, small clumps can accumulate within the internal pocket of the globe, which can contribute to weight-related errors. ... Never submerge, spray, or soak the base or control panel as they contain sensors and ...Jan 15, 2018 · Check how much you need to screw the nut according to the color of the foot White foot (and the bolt is 1 7/8'' 47mm): you need to screw for the bolt to be about ~1/4" (6.35mm) from the bolt. Black foot (and the bolt is 1 5/8'' 41mm): you need to screw for the bolt to just be a mm from the bolt. Step 4: Reassemble the Litter-Robot Litter-Robot 4 control panel features 5 buttons and an LED display for easy operation. If your unit’s light bar is flashing blue, this indicates that the waste drawer is full. Empty the waste drawer, press the Reset button, then press the Cycle button. Learn more. If your unit's light bar is blue with two flashing yellow lights, this ...If your Litter-Robot sits on carpet or has a rug or mat under it, the cat sensor can become less sensitive over time, potentially leading to issues with sensing when your kitty has entered or exited the unit. The Litter-Robot 4 Carpet Tray improves the accuracy of SmartScale® weight readings when Litter-Robot 4 sits on carpet or uneven surfaces.OmniSense Cat Detection System The Litter-Robot's Cat Sensing system is a combination of Optical and Weight Sensors that detect your cat attempting to enter the unit during a cycle. If a cat attempts to enter the unit during a cycle, the Globe will stop with the Light Bar displaying red, indicating the cycle has been interrupted.I have had my litter robot 4 since Christmas and I really want to like it. Currently, it requires more attention than my old litter box because the cycle gets interrupted 3 to 4 times a day. ... as simple as one of your cats seeing the unit in motion and popping their head in to investigate or just dust from the litter on the optical sensors ...The first robot was created by the Greek mathematician Archytas of Tarentum. It was a flying wooden dove that traveled up to 200 meters through the air by flapping its wings.

I have a Litter Robot 3 which I purchased in April 2021. S/N LR3171595. Order #: 1085085. About a week ago the yellow light for the pinch sensor started flashing rapidly. At first I was able to take the unit apart and use a soft brush to clean litter and dust out of the base and this would fix the problem.A self-cleaning litter box provides a better way of life for you and your cat. With more than 50,000 reviews, the Litter-Robot is not only the highest-rated self-cleaning litter box—it's the best litter box for your cat, period.The Litter-Robot automatically provides a clean bed of litter every time your cat needs to go while eliminating the chore of scooping the litter box.Phone and Chat support available Mon-Fri: 9AM-7PM EST and Sat: 9AM-5PM EST, or submit a ticket anytime. Chat with us 1-877-250-7729 Submit a ticket. Troubleshoot your Litter-Robot 4 with our step-by-step hard reset guide. Get your Litter-Robot back to peak performance today! Visit our support page now.I have a Litter Robot 3 which I purchased in April 2021. S/N LR3171595. Order #: 1085085. About a week ago the yellow light for the pinch sensor started flashing rapidly. At first I was able to take the unit apart and use a soft brush to clean litter and dust out of the base and this would fix the problem.The Litter Robot is a self-cleaning litter box that uses sensors to detect when waste has been deposited in the unit. The sensor is an important component of the Litter Robot as it helps to keep the unit running smoothly and efficiently.Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. OmniSense™ also supports the SafeCat system which continuously analyzes four safety zones to ensure your cat is always safe.The Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. Omnisense™ also supports the SafeCat system which continuously analyzes 4 safety zones to ensure your cat is always safe.

Even if their role is the same, there are some differences between the DFI sensors of these two Litter-Robot models. DFI sensor in Litter-Robot 3 and Litter-Robot 3 Connect: This DFI sensor (Product code in RobotShop catalog: Rb-Ltr-72) has two circuit boards. It is based on an IR light. One circuit board is EMITTER and the other one is DETECTOR.Is your $700 cat box a pile of crap? In more ways than it should be? I think that I finally found a fix for mine! Stay tuned!Replace the bonnet by inserting the bonnet tabs into the rear bonnet slots, then press the latches while rotating it forward until the latches click into place. From the Home position, press the Reset button to zero the weight sensors. The Litter-Robot should return home displaying a blue 'ready light' status.First impressions, installation and set-up. The Litter-Robot 4 was delivered in a large box, and setup was super simple. All the parts are modular, so it was easy to put together (and is equally ...Litter-Robot 4 is the latest evolution of the highest-rated WiFi-enabled, automatic, self-cleaning litter box for cats. With over 20 years of customer feedback driving product innovation, Litter-Robot 4 features new sensor and litter-sifting technology for enhanced odour control, cat safety, and real-time tracking of waste and litter levels through the …The new Litter-Robot 4 boasts new patented technology like its OmniSense™ Detection, which has laser and weight sensors to track your cat’s health …

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In this video, our Domestic Robots Specialists Phil and Josué teach you how you can easily replace the cat sensor in your robotic litter Litter-Robot 3 Open ...How and When to Clean Your Litter Robot Open Air III Cleaning the Litter Robot Open Air III. The Litter Robot Open Air III should be cleaned completely every 1-3 months. We usually wait three months to clean it with our two cats, but probably should do it sooner. It takes about 15-20 minutes to clean the litter robot, and another 10 to dry and ...The Litter-Robot 4 is equipped with OmniSense detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels....Been a few hours and there's no issues yet. Will still be contacting support to discuss the fact that cat urine was able to reach the sensor in the first place, and if there's anything that can be done to prevent this from happening again. A litter box should not be so easily ruined by cats peeing in it. Edit 3: well it worked fine for 24 hours ...Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. OmniSense™ also supports the SafeCat system, which continuously analyzes four safety zones to ensure your cat is always safe. ... These sensors detect when a cat has entered or exited the ...Hi All, I have a LR4 and the cat waste stacks up in the drawer like a little pyramid. This causes the litter robot to tell me the drawer is full and stop cycling. So, I go shake the drawer and spread the waste out and it starts running again fine. I was wondering if anybody else had this issue and if changing the timing for when it cycled or ...

The Litter-Robot four-part system (base, globe, bonnet, and drawer) was constructed with easy maintenance in mind. The modular design allows for effortless access for deep cleaning and parts replacement, making it simpler for you to service your LItter-Robot. Get Litter-Robot 4 support or Litter-Robot 3 support. Litter-Robot repairMay 10, 2022 ... LR4, such as core features, noise level (audios), odor control, sensors ... The Litter Robot 4 vs Litter Robot ... Litter Robot 4 vs Litter Robot 3 ...The Litter Robot 4 Sensor Fault is a common issue that can occur if the robot has not been set up or used correctly. It typically prevents the robot from advancing its cleaning cycle and performing its function. This fault indicates that something is blocking the sensors in the robot form reading obstacles and furniture, which can then lead to ...A step-by-step guide to resetting your Litter Robot 4. Step 1: Unplug and reset the unit. Step 2: Clean the unit thoroughly. Step 3: Check and replace any damaged parts. Step 4: Reassemble and test the unit. Tips for Troubleshooting Common Issues. Conclusion.Robot vacuums have revolutionized the way we clean our homes, making it easier and more convenient than ever. However, just like any other electronic device, they can sometimes exp...If your Litter-Robot sits on carpet or has a rug or mat under it, the cat sensor can become less sensitive over time, potentially leading to issues with sensing when your kitty has entered or exited the unit. The Litter-Robot 4 Carpet Tray improves the accuracy of SmartScale® weight readings when Litter-Robot 4 sits on carpet or uneven surfaces.Get started by following the steps below. If possible, place Litter-Robot in the same location as the old litter box (at least during transition). Make sure the unit is on a firm, level surface in a cool, dry location. Locate the unit near a power outlet. Ensure the unit isn't pushed against a wall or into a corner.Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. ... Press the Reset button to zero the weight sensors. Carbon filter. Litter-Robot 4 is equipped with a carbon filter that is installed on the outside of the globe. When the globe is in the ...Featured Product. Litter-Robot 4. See Price at Litter-Robot. What is a Litter-Robot & what to expect. The Litter-Robot is a self-cleaning litter box that can accommodate up to four cats in one household.

Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. OmniSense™ also supports the SafeCat system, which continuously analyzes four safety zones to ensure your cat is always safe. ... These sensors detect when a cat has entered or exited the ...

The Whisker Litter-Robot 4 OdorTrap Holder is a uniquely crafted holder that seamlessly integrates with the Litter-Robot 4. It is capable of accommodating up to three OdorTrap Packs, designed to capture and neutralize odors before they permeate the surrounding environment. This holder serves as an effective replacement for the carbon filter ...If your Litter-Robot sits on carpet or has a rug or mat under it, the cat sensor can become less sensitive over time, potentially leading to issues with sensing when your kitty has entered or exited the unit. The Litter-Robot 4 Carpet Tray improves the accuracy of SmartScale® weight readings when Litter-Robot 4 sits on carpet or uneven surfaces.In this video we will be going over how to clean the Litter-Robot 4. The steps in this video will show you how to clean the litter robot globe. While I use a... Litter-Robot 4: Red Light Bar Flashing (Cat Sensor Fault) Litter-Robot 4: Red Light Bar Momentary Flash (Control Panel Lockout Mode) Litter-Robot 4: Red Light Bar with Partial White Flashing (Globe Position) Cleaning the Litter Robot 4 is a crucial aspect of maintaining a hygienic and odor-free environment for your feline companion. By following a few simple ... Step 4: Lastly, it is important to regularly check and clean the litter sensor window. This window is located on the inside of the base near the waste drawer area. It is responsible for ...Returning my Litter-Robot 4. I have now gone through two Litter Robot v4's. Both of them kept "jamming" or something was wrong with the censors. I can't believe with all of the issues I've been reading about the LR, Wisker even put out this product. The last customer service representative even admitted lots of people are returning them and ...Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. There are three laser sensors located in the top of the bezel, called curtain sensors, that accurately measure the capacity of the waste drawer. Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. There are three laser sensors located in the top of the bezel, called curtain sensors, that accurately measure the capacity of the waste drawer.

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Featured Product. Litter-Robot 4. See Price at Litter-Robot. What is a Litter-Robot & what to expect. The Litter-Robot is a self-cleaning litter box that can accommodate up to four cats in one household.Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. OmniSense™ also supports the SafeCat system which continuously analyzes four safety zones to ensure your cat is always safe. ... These sensors detect when a cat has entered or exited the ...To reset the Cat Sensor, the unit must be at the Home position with a solid blue light displayed on the control panel. If you press Reset while the unit is cycling, it will pause the cycle; simply press Cycle to restart the cycle or Reset to abort the cycle and return the Globe to the Home position. (If you press and hold the Reset button for ...Phone and Chat support available Mon-Fri: 9AM-7PM EST and Sat: 9AM-5PM EST, or submit a ticket anytime. Chat with us 1-877-250-7729 Submit a ticket. Learn how to troubleshoot the cat sensor on your Litter-Robot 3. Find solutions to issues with yellow flashing lights, interrupted cycles, and more.With over 20 years of customer feedback driving product innovation, Litter-Robot 4 features new sensor and litter-sifting technology for enhanced odor control, ...First impressions, installation and set-up. The Litter-Robot 4 was delivered in a large box, and setup was super simple. All the parts are modular, so it was easy to put together (and is equally ...Litter-Robot 4 I've been trying to find an answer for this but can't seem to. I submitted a ticket and am waiting on a response, but has anyone had issues with a dirty sensor notification when...the sensor shouldn't be dirty? I'm using a 99.9% dust-free litter, have cycled it like three times total, and my cat hasn't even used it yet. ...Connect Litter-Robot 4 and Feeder-Robot to the Whisker app to monitor your pet's health habits, plus get comprehensive coverage with our hassle-free 3-year protection plan. ... Litter-Robot 4 uses laser and weight sensor technology to detect when your cat enters and exits the globe, which triggers the countdown timer and cleaning cycle.Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. OmniSense™ also supports the SafeCat system which continuously analyzes four safety zones to ensure your cat is always safe.Visit for solutions if your Litter-Robot 4 has a red light bar with a partial white flashing globe. Get instant support and fixes today. ... Litter-Robot utilizes position sensors to determine the position of the globe during rotation. Additionally, the speed of the globe is calculated to ensure continued operation as a backup to the position ...Litter-Robot 4 is the latest evolution of the highest-rated WiFi-enabled, automatic, self-cleaning litter box for cats. With over 20 years of customer feedback driving product innovation, Litter-Robot 4 features new sensor and litter-sifting technology for enhanced odor control, cat safety, and real-time tracking of waste and litter levels through the Whisker app. ….

Both the Litter-Robot 3 and 4 utilize a weight-based sensor system, but the Litter-Robot 4 has an added laser-based system that enables the unit to detect smaller cats. The Litter-Robot 3 minimum sensing weight is five pounds versus the 4's three-pound minimum. Additionally, its pinch sensor needs regular maintenance to avoid malfunctions ...The Litter-Robot 4 Ramp is not compatible with the Litter-Robot 4 older fence. 2. Newer Fence. If you are using the newer version of the Litter-Robot 4 fence (without a plastic shield), you can either a) remove it and use the standard Ramp Hinge or b) keep the fence on and follow the instructions for the Ramp Fence Hinge.The Litter-Robot is equipped with weight sensors located in the base of the unit that are used to further detect and weigh the cat within the globe while in the Home position. If your Litter-Robot 4 is not accurately detecting your cat's weight, this is typically an issue with the placement of your robot. ...Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. OmniSense™ also supports the SafeCat system which continuously analyzes four safety zones to ensure your cat is always safe.The Litter-Robot 4 Cat Presence Sensor is a motion sensor specifically designed to monitor the waste drawer of the Litter-Robot 4. It is available for replacement purposes. It is available for replacement purposes.Litter-Robot 4. CA $999. Buy in monthly payments with Affirm on orders over $50. Learn more. Never scoop again! Our smart, self-cleaning litter box for cats is quieter, sleeker, and provides a fresh bed of litter after every use while reducing litter tracking and odors. Join 1 million pet parents who've upgraded to a smarter automatic litter box.Just adding that I also encountered this red/blue alternating flashing LED along with a mixed solid green/blinking red LED on litter robot 4 and what I did was remove the globe, and cleaned around the edges that lead to the litter drawer in the litter robot housing. I also wiped down the sensors at the top of the entrance into the litter robot ...Seems to be a server issue on Whisker's end. As far as stuck on timing, make sure no cat hair is dangling in front of any of the 3 sensors at the top of the entrance. Dust can get in them too. 24K subscribers in the litterrobot community. Community for all things Litter-Robot. Post your experiences, tips, tricks, and hacks. Litter robot 4 sensors, Litter-Robot 4. I haven’t seen a post on this recently but I assume others are getting a “Sensor Dirty” notification once in a while? Ever since I started gently wiping the sensors with a dry q-tip my LR4 has been working great and now the notification helps me stay ahead of any sensor faults. The only issue I noticed lately is that the ..., Dual sensor technology in the litter robot 4: a fight between sensors. Sensor technology is among the most significant differences between LR3 and. the LR4. Litter Robot 4 is equipped with two different kinds of sensors to guarantee an accurate cycle activation. The Curtain Type Sensor, located at the Globe entry point, is comprised of 3 motion ..., The Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. Omnisense™ also supports the SafeCat system which continuously analyzes 4 …, Title says it all. Got a brand new litter robot 4 this Saturday. The thing keeps cycling every 10-15 minutes. The light turns & stays blue (all clear) for ~15 mins after a cycle completes, before the litter robot "detects" a cat again and the light goes red. I've tried cleaning the IR sensors up front, but that didn't help., Press Cycle if the unit is not already cycling.3. Take one of the magnets and slide it towards the left side of the motor gear. If the unit stops, and the gear reverses direction, this will be the triggering side.4. Place the triggering side down towards the …, I got a notice saying my lasers/sensors need to be cleaned, do they have a guide on doing this, or someone here that wants to weigh in? I dont want to do anything wrong to this expensive mama jama. I am super tech savvy and handy so I do not see why I couldnt safely clean these sensors but with my warranty I figure ill do it the Whisker way., May 10, 2022 ... Get your Litter-Robot 4 and *save 50$* today! https://rb.gy/xzj7m The new Litter-Robot 4 brings cool upgrades, not only a more compact and ..., Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. There are three laser sensors located in the top of the bezel, called curtain sensors, that accurately measure the capacity of the waste drawer., 2023年3月に予約して海外からの入荷を待ちに待って、2023年月6月末についに届きました。. あの日本一YouTuberも猫大好き芸人も使っている『Litter-Robot 3』の最新バージョン、『Litter-Robot 4』です。. Litter-Robot 4 猫用全自動洗浄トイレ - 白色. 楽天市場で見る., Hitting the reset the cycle resumes for ~3 seconds and stops with another red bar. It takes 8-10 resets to get it all the way through the first 1/2 of the cycle (to the dump portion). The 2nd 1/2 of the cycle only takes 3-5 resets. Once it get to the start position the bar goes blue. Following the trouble shooter I wiped the sensor area with a ..., Learn how to remove and install the Litter-Robot 4 Laser Board. Litter-Robot is equipped with curtain sensors looking downward across the unit opening and into the globe that detect when a cat enters or exits the globe while in the Home position. You will need: Phillips-head screwdriver; Make sure the unit is in the Home/Ready position., There are sensors on each side of drawer. The sensors have a clear lens on each. Clean. Also mine kept getting same problem after cleaning. So there is a hole a about the size of pencil eraser. Some poop got through hole on left sensor. It was on top of circuit. I used a soft DRY toothbrush to clean. After that no problems., Learn how to remove and install the Litter-Robot 4 Laser Board. Litter-Robot is equipped with curtain sensors looking downward across the unit opening and into the globe that detect when a cat enters or exits the globe while in the Home position. You will need: Phillips-head screwdriver; Make sure the unit is in the Home/Ready position., Been a few hours and there's no issues yet. Will still be contacting support to discuss the fact that cat urine was able to reach the sensor in the first place, and if there's anything that can be done to prevent this from happening again. A litter box should not be so easily ruined by cats peeing in it. Edit 3: well it worked fine for 24 hours ..., Clean the bezel. If your cat's weight is reading 0.0, clean the bezel. Debris (dust, cat fur, etc) can interfere with the laser sensors and inaccurately measure your cat's weight. Wipe the bezel area where the sensors are located with a dry clean cloth to remove any hair or dust. Vacuum the inside perimeter of the bezel with a brush attachment ..., The Litter-Robot 4 globe has a 15.75''W opening compared to Litter-Robot 3's 10.25''W opening. This presents a more inviting feel for cats that may initially be skeptical of using a covered litter box. Larger waste drawer. The Litter-Robot 4 waste drawer is 20 percent larger than Litter-Robot 3's., The Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. Omnisense™ also supports the SafeCat system which continuously analyzes 4 safety zones to ensure your cat is always safe. , Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. There are three laser sensors located in the top of the bezel, called curtain sensors, that accurately measure the capacity of the waste drawer. , Details. Stop scooping today and give your cat clean litter every time they go with the Litter-Robot 3, the highest-rated automatic, self-cleaning litter box. Purchase includes a 90-day in-home trial (does not include return shipping costs) and comprehensive coverage with our WhiskerCare™ 2-Year Warranty. Never scoop cat litter again., The Litter-Robot is equipped with weight sensors located in the base of the unit that are used to further detect and weigh the cat within the globe while in the Home position. If your Litter-Robot 4 is not accurately detecting your cat's weight, this is typically an issue with the placement of your robot. ..., The Litter Robot is a self-cleaning litter box that uses sensors to detect when waste has been deposited in the unit. The sensor is an important component of the Litter Robot as it helps to keep the unit running smoothly and efficiently., Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. OmniSense™ also supports the SafeCat system, which continuously analyzes four safety zones to ensure your cat is always safe., Litter-Robot 3 Connect. CA $799. Buy in monthly payments with Affirm on orders over $50. Learn more. Never scoop again and experience a new level of cleanliness with Litter-Robot 3 Connect, the top-rated self-cleaning litter box for cats. Since 2000, over 1 million happy pet parents have upgraded to Litter-Robot., The oxygen sensor in your car or truck monitors the level of oxygen in your vehicle’s exhaust. The sensor is linked to the on-board computer, which adjusts the fuel mixture and eng..., Step 1: Check the Sensor's Placement. Obviously, the first fix you would want to apply is to check the placement of the sensor. The sensor should be placed in the middle of the entrance, with the lens facing toward the inside of the litter box. If the sensor is not properly placed, it may not be able to detect when a cat enters or exits the box., Infrared emitters and sensors detect the level of waste in the drawer, and the blue light on the control panel flashes when it's time to empty. ... Simply place OdorTrap™ Packs in your Litter-Robot 4 filter pocket (see installation guide) or Litter-Robot 3 waste drawer near the carbon filter. We recommend replacing one pack every …, The Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. Omnisense™ also supports the SafeCat system which continuously analyzes 4 safety zones to ensure your cat is always safe., Litter-Robot 4 is equipped with OmniSense™ detection that utilizes laser and weight sensor technology to provide real-time litter and waste drawer levels. There are three laser sensors located in the top of the bezel, called curtain sensors, that accurately measure the capacity of the waste drawer., If your calibration goes successfully your light bar will flash red green and blue then it will cycle with a solid yellow bar flashing green. If it dosent successfully calibrate (like mine and many others) it will have a solid yellow bar and flash red and will not cycle., A self-cleaning litter box like Litter-Robot eliminates the need for pet parents to have to scoop, saving time and frustration brought on by an unpleasant chore. Additional benefits include better managing odour control, keeping cats’ …, Reply. litterrobot. •. That Blue flash followed by the rapid Yellow flash is indicative of a failure in the Drawer Full Indicators and Pinch Detect Terminals. If your Litter-Robot is in Warranty, give our Customer Experience Specialists a call at 877.250.7729., Litter-Robot 4: Laser Sensor Cleaning Instructions Litter-Robot 4: Light Codes Guide ; Litter-Robot 4: Night Light Feature ; Litter-Robot 4: Night Light Not Coming On or Shutting Off Litter-Robot 4: Ongoing Maintenance Litter-Robot 4: Purple Light Bar (Sleep Mode) Litter-Robot 4: Red & Blue Alternating Light Bar (Laser Board Fault) ..., FAQ. Our Final Verdict. We give Litter-Robot 3 litter box a rating of 4.6 out of 5 stars overall. 96. 90. 80. 90. The Litter-Robot 3 is a dream come true for cat owners. This premier litter box ...