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Roborock Customer Service Center - Technical Support
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complete cleaning the originally divided areas first before taking care of the extended areas.
3. Q: Why does the machine slow down in an open area?
A: In the exceedingly rare occasions, highly reflective objects such as electric appliances with
a mirrored surface or highly reflective furniture in a home environment will interfere somewhat
with the laser distance sensor. The machine will mistakenly determine there is an obstacle in
front and thus slow down. This generally lasts for a short time and will not affect the operation
and cleaning task. Another likelihood is a failure of the ultrasonic sensor due to dirt. The
machine may mistakenly determine there is an obstacle in front and thus frequently slow down.
In this case, please clean the ultrasonic sensor.
4. Q: Why is the machine not designed to fully avoid impacting furniture?
A: To achieve optimum cleaning, the machine is designed to work in extreme distances. Without
impact, waste at the base of furniture may not be effectively vacuumed. For this reason, the
machine is designed in such a way that it can slightly impact furniture to ensure the most
effective cleaning result. However, please rest assured that, as the machine is provided with an
ultrasonic sensor and a laser distance sensor, most furniture can be properly identified and the
machine will decelerate before impact; thus, furniture or the machine itself will not be damaged.
5. Q: Why does the speed of the side brush change frequently?
A: The side brush, when working along a wall or around an obstacle, will run at full speed of
330 RPM to ensure that waste in a corner and at the base of furniture is completely collected.
Nevertheless, when operating in a Z-shaped path, it will switch to low speed of 130 RPM in an
open area to prevent waste flying about. Dynamic regulation of the side brush can ensure
optimum cleaning.
6. Q: Why don't the brush and fan turn off when the machine returns to recharge?
A: Firstly, this is to prevent deformation or damage to the side brush as a result of impact when
the machine goes to recharge. Secondly, it is to prevent any leakage from the dust bin due to
the machine shaking when it goes to recharge.
7. Q: Why do the side brush and main brush of the machine rotate in reverse?
A: When any entangled foreign matter (such as a USB cable) is detected, the main brush and
side brush of the machine will try to reverse to unwind it. In some cases, the side brush, even