Siemens Micromaster 420 or MM420 Drive
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Jun 09, 2022 5:35 am
A0504 Inverter overtemperature alarm in siemens micromaster 420 or MM420 drive comes when the inverter heatsink temperature (P0614) was exceeded.
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Jun 09, 2022 5:37 am
Cause : Inverter over temperature - when 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:
1. The ambient temperature within the permissible limits.
2. The load and load duty cycle within the permissible limits.
