F0002 fault in siemens micromaster 420 or MM420 drive

 How can resolve problem F0002 fault in siemens micromaster 420 or MM420 drive ?

F0002 Overvoltage fault

Cause

- DC link voltage (r0026) higher than the overvoltage threshold (refer to parameter r0026)
- ground fault

Diagnosis & Remedy

Please check the following:
- is the line supply voltage within the permissible range?
- has the DC current DC link monitoring been enabled (P1240) and correctly parameterized?

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