oH1 fault in Emotron VSB Drive

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oH1 fault 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.

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