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A0504 Inverter overtemperature alarm in siemens micromaster 420 or MM420 drive

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How can resolve problem A0504 Inverter over temperature alarm in siemens micromaster 420 or MM420 drive ?

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Posts: 5095
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Topic starter
(@click2electro)
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Joined: 2 years ago

Cause : Inverter over temperature.

- alarm threshold of the inverter heatsink temperature (P0614) was exceeded; this results in a reduction of the pulse frequency and/or the output frequency (dependent on the parameterization in (P061).

1. Check if ambient temperature is within specified limits
2. Check load conditions and duty cycle
3. Check if fan is turning when drive is running

Please check the following:
- is the ambient temperature within the permissible limits ?
- are the load and load duty cycle within the permissible limits ?

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