Why won't the preset speed buttons work on my Vertx?

The button speeds can be accidentally programmed to zero speed: don't worry, just follow these steps and all will be well.

1. Use the speed up and slow down buttons to find your desired walking speed

2. Press and hold the button you want to program for three seconds: the trolley will stop

3. Release the button and the trolley will restart: your new speed is now stored.

Still not sure?

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