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- Error Code - 437 - Power Module Problem
- Error Code - 438 - Function Imcompatibility
- Error Code - 443 - Intermediate Circuit Voltage Low
- Error Code - 445 - Impermissible limit value settings
- Error Code - 447 - Insulation fault
- Error Code - 448 - Neutral Conductor not connected
- Error Code - 450 - No guard found
- Error Code - 451 - Memory error detected
- Error Code - 452 - Comm Error w/ Processors
- Error Code - 453 - Brief grid voltage error