RideFixerRad Power Bikes error code
Rad Power Bikes error 21: Abnormal current
Medium severity Service soon
Can I ride home with this error?
Ride with caution. Assist may cut out; you can pedal the bike without assist.
What it means
On colour displays Rad describes this as abnormal motor current. On LCD/LED/Rad UI bikes it often points to a problem with power from the battery to the controller, and can happen when the bike is pushed too hard (throttling up a big hill or carrying too much weight).
Likely causes
- Overloading: long steep throttle climbs or too much weight
- Dirty, wet or damaged battery contacts or tray
- Loose battery or motor connector
Symptoms
- Error 21 on the LCD or colour display
- LED display: pedal assist level 0 flashes
- Rad UI remote: 'E' with lit power bars
How to fix it
- Stop and turn the bike off; let the motor cool for a while.
- Turn the bike on again – this often clears it.
- Turn off, remove the battery and check the battery terminals and mounting tray are clean and dry.
- Check the battery and motor connectors are clean, dry and fully pushed together (pull straight apart, do not twist).
- If contacts or connectors are wet, dirty or damaged, or the error stays, contact Rad Power Bikes support.
How urgent is it?
Check connectors if a rest and restart do not clear it.
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