E.dOH fault in KEB COMBIVERT F5 Drive indicates a Motor Overheat. This means the external PTC temperature sensor has tripped, signaling that the motor is running dangerously hot.
Cause:
If a motor PTC temperature sensor, relay, or KTY (special hardware required) is connected to terminals T1, T2 and the motor overheat function US.33 EdOH Function = On, then the relay opens when PTC resistance exceeds 1650 Ohms.
Excessive motor heating causes may include:
- Excessive current.
- Incorrect encoder settings.
- High mechanical load/friction.
- Insufficient motor cooling.
Remedy:
- Verify correct motor data.
- 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.
- Check for high mechanical load/issues (friction).
- Inspect and ensure sufficient motor cooling.
