Variobot varikabo Instructions Manual page 27

Fault Diagnosis
Problem
varikabo does not move at all.
Only one of the motors is running.
A motor runs backwards.
varikabo only drives straight ahead.
varikabo gets stuck on the ground.
If none of these causes apply to your problem,
check carefully that all components are installed as
described in the construction plan.
Possible Reasons
The left and right sensors are incorrectly polarized.
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The battery cable is incorrectly installed.
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The battery is empty or defective.
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A transistor is installed with the wrong polarity.
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The transistors BC516/BC517 are installed reversed.
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Either the left or the right sensor is incorrectly polarized.
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A motor is not soldered on correctly.
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This motor is installed with the wrong polarity and soldered
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on.
The center sensor is connected incorrectly.
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varikabo is placed lopsided on the cable ties.
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The surface is too uneven for varikabo.
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If you need help, please contact us with a detailed
error description and a photo or video of your
varikabo robot:
info@variobot.com