Siemens Micromaster 420 or MM420 Drive
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Jun 09, 2022 4:46 am
F0004 Inverter overtemperature fault in siemens micromaster 420 or MM420 drive - comes when ambient temperature is too high or IGBT is overload or cooling fan is faulty.
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Jun 09, 2022 4:47 am
Cause - comes when ambient temperature is too high or IGBT is overload or cooling fan is faulty.
1. inadequate cooling
2. ambient temperature is too high.
Diagnosis & Remedy please check the following:
1. is the pulse frequency P1800 set to the factory setting ? If required reset P1800.
2. does the ambient temperature lie within the permissible limits ?
3. reduce the load and / or ensure adequate cooling.
4. The fan rotate if the inverter is operational
