Litter-Robot III | How To Fix Blinking Flashing RED Light, Diagnose, Repair & Replace LR3 Cat Sensor

Author channel EyeOnAiman   2 мес. назад

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Litter Robot Open Air (at 28 months) Stuttering Rotation Issue Common Fix

If you find this video helpful, please click the following referral link, and you will receive $25 off your new purchase. Feel free to ask questions in the comment section and I will respond as quickly as possible to help expedite a future free of scooping litter. This is a common troubleshooting video for the stuttering problem that can occur. I have owned my Open Air for 28 months now. This is complimentary to a series of reviews and tips over time of ownership of the Litter Robot Open Air. Hope you enjoy and your future is filled with less cat pee and poo scooping! Common stuttering issue video 2 year review 1 year review 6 months review 2 months review Review at time of purchase

Litter Robot Open Air Self Cleaning Litter Box Review 2 Years Later! - Should You Get It?

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Litter-Robot Open Air How-To: Drawer-Full Indicator (DFI) Replacement

If the drawer-full indicator, or DFI, is not working correctly on your Litter-Robot, the problem could be with your DFI circuit board. You have the choice of sending the machine to us for repair or, if you are handy, doing it yourself. You can purchase the necessary part and get answers to other questions by contacting our customer service staff at To replace the DFI circuit board, you will need a pair of needle-nose pliers and a Phillips screwdriver. Start by unscrewing the five screws that hold the top cover in place to get at the connector and main circuit board. Use needle-nose pliers to help pull the cover off and separate the cover assembly from the main board. Unplug the small four-pin connector and move the motor up and down to remove the wire. Remove the plug with your needle-nose covers and shove the disconnected wire through the hole as far as you can. Put the cover back on the base and retighten the screws. Now, flip the base over and unscrew the nine screws. Lift the cover straight up and rest it behind the unit. Remove the rest of the DFI harness and gently remove the connector. On the other side, use your needle-nose pliers to remove the two black wires that connect to the pinch contacts. Then remove the two screws on each side that hold the DFI and brackets in position. Free the clip where the ribbon connects and gently lift up. You now have removed the old DFI. Installation of the replacement DFI is the reverse. Line up the two boards and tuck the ribbon cable inside the screw mount. Tighten the four screws and tuck the ribbon cable back under the retaining clip. Using your hands or your needle-nose pliers, reconnect the black wires to the pinch contacts. Make sure they’re on securely. Put the connector in the little hole to reconnect to the main board. Shove as much of the wire as possible through. Realign the bottom cover and tighten its nine screws. Turn the base over. Remove the cover again to reattach the DFI connector to the main board. Lift the motor up and move the wire along with the rest of the wires. Reuse the tape or apply new tape to keep the wires from interfering with the motor. Attach the DFI connector to the four-pin. Reinstall the little plug and push down with a standard screwdriver until you hear a click. Line up the cover and circuit board and nestle them back into position. Then retighten the five screws and you are open for business.

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The red blinking light indicates CATS (the cat sensor) is detecting excess weight for more than 2 minutes. In this comprehensive tutorial video guide, Aiman will take you through the steps of troubleshooting and diagnosing the red flashing light on your Litter-Robot III (LR3) Open Air automatic self-cleaning robotized litter-box if it stopped working and displaying the above fault message or error code.

In most cases, the red blinking or flashing light on the front panel indicates defective CATS sensor, but the first thing you should do before taking further steps is to do the following:

Please check your unit for:
* The litter is above the fill line or in excess of 10lbs.
* CATS has not been reset after adding weight
* The waste drawer has too much weight
* The unit is sitting on an uneven surface ‐ grout lines on tile floor or in a bathtub.
* The unit is pushed into a corner, against a wall, or furniture
* Objects are resting or pressing on the unit

To test your changes, power the unit off and then on. Allow the unit to complete the start‐up cycle and return Home with a solid blue light which indicates your unit is operating normally.

Always press Reset after emptying the waste drawer, adding litter, or moving the unit. You can also turn the unit OFF then ON to ensure the baseline is set properly. When pressing Reset, watch for the blue light to quickly flash one time. This indicates CATS has been successfully reset.

If none of the above solves the issue:
1. Remove the bonnet.
2. Remove the globe
3. Replace the bonnet
4. Press Cycle (without the globe on the unit)
5. Allow the motor to run for 5 seconds, at any point, does it stop and flash red? If no, then excess weight needs to be removed from the globe. If yes, (it blinks red), then watch this video for further steps.

In this video, Aiman will show you how to take apart Litter-Robot III and test the CATS sensor to see if it is actually the culprit by using a simple multi-meter to measure the resistance in the pressure sensor. Aiman will also show you how to jump the CATS sensor should you need to continue to operate LR3 while waiting for the parts to arrive. Please note that you should only do this at your own discretion as jumping or bypassing the sensor might damage the LR3 circuit board. He will then show you how to remove, replace and repair the CATS sensor.

When putting back the bottom foot bolt, It's essential that you DO NOT overtighten the nut as it will crush the cat sensor.

If your foot is white (and the bolt is 1 7/8'' cm) : you need to screw for the bolt to be about ~1/4" (6.35mm) from the bolt.
If your foot is black (and the bolt is 1 5/8'' cm) : you need to screw for the bolt to just be a mm from the bolt.

Taking apart the unit is actually quite simple and easy, however there are a few specialized tools you might need and Aiman will explain that in this video.

Keep in mind that we're are owners of LR3 and not the expert in fixing the unit. There are forums and blogs available online if you need help with how to diagnose, troubleshoot and solve your issues. Here's one of them:

If you need to order the parts, click on the following link:

Where to Buy Litter-Robot III Open Air:

3. & eBay

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