Siemens Micromaster 430 or MM430 Drive
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Jun 11, 2022 9:49 am
How can resolve problem A0504 alarm in siemens micromaster 430 or MM430 drive ?
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Jun 11, 2022 9:50 am
Cause : Inverter OverTemperature. Warning level of inverter heat-sink temperature (P0614) is exceeded, resulting in pulse frequency reduction and/or output frequency reduction (depending on parameterization in P0610).
Diagnose & Remedy
Check the following:
1. Load conditions and duty cycle must be appropriate
2. Fan must turn when inverter is running
3. Pulse frequency (P1800) must be set to default value
4. Ambient temperature could be higher than specified for the inverter
