| Error No. | Explanation | Corrective measures |
| 6440 | Hermetic protection of the transformer no longer exists |  |
RNWBL Service Line
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- Switching Off the Inverter
- Provisioning / Updating SC20CONT Firmware - SMA CP
- Disconnecting DC Side
- Provisioning /Updating the AST Firmware - SMA CP-US
- Error code - 103 - Grid voltage is too high.
- Disconnecting AC Side
- Disconnecting the Supply Voltage and External Voltages
- Loss of Power (No Display)
- Error Code - 104 - Grid voltage too high
- Reconnecting the Supply Voltage and External Voltages
- Error Code - 203 - Grid Voltage is too high.
- Reconnecting AC Side
- 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
- Error Code - 3403 - PV Array Voltage too high.
- Error Code - 3404 - Open - circuit voltage too high