| Error Code | Illustration | Trigger Reason | Solution |
|---|---|---|---|
| Display | Screen blank | 1. No power supply to the inverter. 2. The display enters sleep mode. | 1. Check whether the battery circuit breaker, PV circuit breaker, and AC input breaker are closed. 2. Ensure the switch is in the ON position. 3. Press any button to wake the screen. 4. If the problem persists, contact technical support. |
| 01 | Battery undervoltage protection | Battery voltage is lower than the value set by parameter [14]. | 1. Check battery type and ensure it matches parameter [08]. 2. Verify the actual battery voltage. 3. Charge the battery until voltage exceeds parameter [14]. 4. The fault will clear automatically after voltage recovery. |
| 02 | Battery discharge overcurrent | 1. Battery discharge current exceeds the limit for more than 1 minute. 2. Battery voltage drops due to heavy load. | 1. Restart the inverter manually. 2. Reduce load and recharge the battery. 3. If current returns to normal within 10 minutes, the alarm will clear automatically. |
| 03 | Battery missing warning | 1. Battery not connected. 2. Lithium battery BMS protection activated. | 1. Check battery connection. 2. Ensure the battery switch is ON. 3. If lithium battery is protected, charge using PV or grid power. 4. Restart the inverter after verification. |
| 04 | Battery over-discharge protection | Battery voltage drops below parameter [12]. | 1. Charge the battery until voltage exceeds parameter [35]. 2. Restart the inverter if the fault does not clear automatically. |
| 05 | Battery overcurrent protection | 1. Hardware detects battery discharge overcurrent. 2. Possible battery MOS tube short circuit. | 1. Restart the inverter with only battery connected. 2. Reconnect PV, grid, and load step by step. 3. If the fault persists, internal hardware may be damaged. |
| 06 | Battery overvoltage protection | Battery voltage exceeds the allowable input range. | 1. Disconnect PV and grid input. 2. Reduce battery voltage until it drops below the recovery point. 3. Verify displayed voltage matches actual voltage. |
| 07 | Boost circuit overvoltage | Battery boost circuit causes excessive bus voltage. | 1. Restart the inverter with only battery connected. 2. Check battery voltage and parallel configuration. |
| 09 | PV input overvoltage | Too many PV modules connected in series causing high open-circuit voltage. | 1. Measure PV input voltage. 2. Reduce number of PV modules connected in series. |
| 10 | PV charging overcurrent | Too many PV modules connected in parallel. | Reduce the number of PV modules connected in parallel. |
| 12 | Communication failure | Master-slave chip SPI communication interruption. | 1. Wait 10 seconds for automatic recovery. 2. Restart the inverter if the fault persists. |
| 14 | Inverter overload | Output current exceeds rated current. | 1. Reduce load power. 2. Restart the inverter. |
| 17 | Inverter short circuit | Short circuit detected on AC output side. | 1. Inspect load wiring and remove short circuit. 2. Restart inverter with only battery connected. |
| 19 | PV side over-temperature | PV radiator temperature exceeds 90°C. | 1. Allow inverter to cool down. 2. Restart after temperature drops below safe level. |
| 20 | Inverter over-temperature | Inverter cooling block exceeds safe temperature. | 1. Improve ventilation. 2. Restart after cooling. |
| 21 | Fan failure | Cooling fan malfunction or blocked airflow. | 1. Check fan for obstruction. 2. Verify wiring. 3. Replace fan if damaged. |
| 29 | Bus undervoltage | Bus voltage lower than required threshold. | 1. Check battery voltage. 2. Reduce load. 3. Restart inverter if necessary. |
| 34 | Parallel communication failure | Parallel CAN communication not detected. | 1. Check DB15 communication cable. 2. Verify correct wiring between inverters. |
| 58 | BMS communication error | Inverter cannot communicate with battery BMS. | 1. Check communication cable (RS485). 2. Verify battery address and protocol settings. 3. Confirm lithium battery parameters are correct. |
| 60 | BMS battery low temperature | Battery temperature below operating range. | Stop charging until battery temperature returns to normal. |
| 61 | BMS battery over temperature | Battery overheating detected by BMS. | Stop charging and allow the battery to cool down. |
| 63 | BMS battery undervoltage | Battery voltage below minimum level. | Charge the battery until voltage returns to normal. |
| 64 | BMS battery overvoltage | Battery voltage exceeds safe limit during charging. | Charging will stop automatically until voltage returns to normal. |
A solar inverter fault code is an error message displayed by the inverter when it detects abnormal operating conditions such as low battery voltage, PV input issues, overheating, or communication failures. These codes help users quickly identify and troubleshoot problems within the solar power system.
To fix a solar inverter error code, first identify the specific code shown on the inverter display. Then check common causes such as battery voltage, PV input voltage, load conditions, and wiring connections. In many cases, restarting the inverter or reducing the load can resolve the issue.
A battery undervoltage fault occurs when the battery voltage drops below the minimum threshold required by the inverter. This may be caused by excessive load, insufficient solar charging, or battery aging. Charging the battery or reducing the load usually resolves the problem.
PV input overvoltage usually happens when too many solar panels are connected in series, causing the open-circuit voltage to exceed the inverter’s maximum input voltage. Reducing the number of panels in the string or adjusting the system design can solve this issue.
Yes, many solar inverter faults will reset automatically once the abnormal condition disappears. For example, overheating faults may clear after the inverter cools down, while overload faults may disappear after reducing the connected load.
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