oH1 fault Emotron VSB Drive indicates Heat sink thermal protection. This means the temperature of the drive’s internal heat sink has exceeded the safe operating threshold.
Possible Causes:
1: Ambient temperature is too high.
2: Fan damaged.
3: Air duct blocked.
4: Temperature sensor abnormal.
5: Inverter module abnormal.
Solutions:
1: Drop ambient temperature.
2: Replace the fan.
3: Clear air duct.
4: Seek services.
5: Seek services.