E.OL2 fault in KEB COMBIVERT F5 Drive indicates a Low Speed Overload. This means the motor has drawn excessive current at a low frequency or standstill for too long, exceeding its thermal capacity.
Cause:
Excessive current at low speed (typically below 3Hz). Possible factors include:
- Incorrect motor data.
- Incorrect encoder configuration.
- High mechanical load/friction issues (e.g. starting or stopping against brake).
Remedy:
- Verify motor data, specifically the motor rated speed and frequency relationship for PM Synchronous Motors.
- Verify correct encoder settings including:
- LF.27: Encoder Pulse Number
- LF.28: Swap Encoder Channels (A/B setting)
- LF.77: Encoder Pole position for PM Synchronous Motors. Relearn Encoder Pole Position as needed (see Section 5.11.1).
- Check for high mechanical load/issues (friction) such as starting or stopping against brake.
