| Error No. | Explanation | Corrective measures |
| 503 | Power frequency is too high. Power frequency fault detected by standard monitoring |
|
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- Error code - 103 - Grid voltage is too high.
- Disconnecting AC Side
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- Loss of Power (No Display)
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- 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
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- Error Code - 502 - Power frequency low
- Error Code - 504 - Power frequency too low
- Error Code - 505 - Power Frequency is too high
- Error Code - 506 - Disconnection from Grid
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- Error Code - 3403 - PV Array Voltage too high.
- Error Code - 3404 - Open - circuit voltage too high