Why do the display LEDs flash when driving backward even though the R20 is switched off?
During the forward movement the motor winding (Stator) is uncoupled (by the freerun). This is not the case when moving backward, as the motor windings create a voltage causing the LED´s flashing, which is completely normal.
Is a drumbrake mandatory?
The R20 is a pushing device without any braking function. A drumbrake is only recommended, but not mandatory, as it always depends on the capabilities of the user and the area of application. (E.g. Environment, sloping terrain.)
What happens when the charging level of the battery is low?
The motor power will be reduced − the motor operates with a low charging level ~100 W lower.
Which chairs is the R20 compatible with?
The R20 is compatible with all wheelchair models that have a box frame and tube diameter between 22 and 28 mm. For the latest information vist the R20 webpage.
Can you shorten (cut) the docking arms?
No. Please do not attempt to shorten or cut the docking arms. Complete docking arms or only tubes are available as a spare part. A matrix of the required docking arm length is available in the parts manual (section documents) or on the web page.