504 - Temperature Derating
Motor is hot; controller reduced output to protect system.
Medium severity
Caution rideability
Info urgency
What it means
Thermal safeguard mode activated.
Common causes
- Long climb under load
- High ambient heat
- Heavy cargo
Symptoms
- Reduced acceleration
- Limited assist
How to fix it
- Cool bike
- Reduce assist level
- Inspect airflow and load