Siemens Micromaster 420 or MM420 Drive
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Jun 09, 2022 5:38 am
A0505 alarm in siemens micromaster 420 or MM420 drive - comes when overload alarm limit P0294 is exceeded or the pulse frequency and/or the output frequency is reduced.
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Jun 09, 2022 5:39 am
Cause : Inverter I2T - when overload alarm limit P0294 is exceeded or the pulse frequency and/or the output frequency is reduced.
1. Overload alarm limit P0294 is exceeded (refer to utilization r0036)
2. The pulse frequency and/or the output frequency is reduced as a function of the setting of parameter P0290
3.Check whether the load duty cycle lies within the permissible limits.
