What does this symbol on the EV3 Brick mean? I can’t figure out how to get my R3PTAR to open and close it’s mouth to bite. I keep getting this symbol. What does it mean?
You either have to recharge your battery (if you're using a battery pack) or replace the batteries (if you're using normal batteries). If this symptom persists after charging the battery pack, try to do a master reset on the brick. Failing which, you might have to replace the battery pack.