Also, I was able to order replacement parts for this bot from the manufacturer's store: Ilife Official Store however the shipping time was quite long 1m+ but they were able to supply all parts (I suppose they carry the spare parts since they still sell the V7s Plus model that is almost identical to the V7S pro) ☺

Hi Lisa, this must be the same problem and using this guide (cleaning the bot or replacing the motor) will work. 4-beeps mean that the bot cannot turn the main brush. What you are observing is likely that when the bot is fully charged, it can rotate the brush for 1-2min (with max battery charge and voltage). Once the battery power dips from 100% it can't overcome the resistance of dirt and hair stopping the brush therefore it starts reporting the error right away within 30 seconds after activating it.

Small update: I've had to replace the brush motor and the vacuum air pump previously, in case your bot is making a whining noise this means the air pump is getting worn. When you take out the main brush motor make sure to inspect and clean the gears (in a small black box on the side of the brush tray, there's a belt in this box as well) and check the motor. After years of service, the motor shaft may have worn out the hole in the motor housing rubbing metal on metal preventing the main brush from rotating.

Hi guys,

I believe there was another question about what to do even if you did everything in the guide and still get 4 beeps: this likely indicates that the problem with the main brush motor persists. The small black gearbox needs to be cleaned. Make sure to PULL the large gear up to clear space underneath it. The main brush motor may also have some hair stuck between the motor and the small metal gear on it. If this still doesn't work I'd recommend trying to replace this motor. They're available on Aliexpress for like $15.

Also check if your screw is inside your bust bin. It might’ve been picked up by main brush and placed in the dust bin.

Hi, no idea what thread it has but specs I measure are following.

1cm tall (thread and top part)

2.5mm diameter with thread (max diameter with thread)

7.7mm tall threaded part

6-7 grooves of thread on 7.7mm part

Wheb testing make sure to put dust bin inside. Mesh screen filter must be installed indise the dust bin.

If still doesn't work try again, there must be mosre dust and hairs stuck some where, pay attention to step 5 and 6 and make sure you put the belt on the gears and it works. This belt drives the main brush.

попробуйте все сначала, скорей всего остались волосы на шестеренка моторчика (шаг 5) или под шестерней в чёрном коробке сбоку от трея для щётки. ещё вариант что ремень внутри коробки не встал на шестерни.

Sincerely happy for you. This is a great bot, the batteries lasst forever and it does pretty good job cleaning floors.

One Last thing. Try to rotate the motor gear to see if it can be rotated by fingers. I had to replace this motor once already as it was wearing out the bearing and the axle was getting stuck and it was difficult to rotated it. The motor often comes with the brush tray, it can be purchased on aliexpress.

For everyone experiencing issues with the main brush after following the guide. Please make sure to pop the gear off (step 6) and remove all dust and hairs from underneath the gear. Next thing is some hair stuck behing the metal gear on the motor. (step 5) there is a possibility of dirt going quite deep inside. Be careful and pull everything out.

Once everything is cleaned and before re-asembling the robot put the motor back in tray and assemble the gearbox. It is very important to make sure the belt inside gets fitted poperly. You need to stretch it in between the gears and close the lid. Once done, try to rotate the main brush and see if this movement is transferred to the metal motor gear. Point is to check if the belt got installed poperly and it works.