| Error No. | Explanation | Corrective measures |
| 4000 | The string-failure detection has detected a defective string. The number of the defective string can be read off in the instantaneous value SSMUWrnCode. The error number appears only on the display. |
RNWBL Service Line
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- Error code - 103 - Grid voltage is too high.
- Disconnecting AC Side
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- Error Code - 104 - Grid voltage too high
- Reconnecting the Supply Voltage and External Voltages
- Error Code - 203 - Grid Voltage is too high.
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- Error Code - 204 - Grid voltage too low
- Reconnecting the DC Side
- Error Code - 205 - Phase Drop Out
- Restarting the Inverter
- Error Code - 502 - Power frequency low
- Error Code - 503 - Power frequency too high
- Error Code - 504 - Power frequency too low
- Error Code - 505 - Power Frequency is too high
- Error Code - 506 - Disconnection from Grid
- Error Code - 801 - Conductor Failure
- Error Code - 1301 - Left Magnetic Field Connected
- Error Code - 1500 - Grid reconnection condition
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