Answers to your questions

This is a permanent fault. Disconnect the inverter from the utility grid and the PV array and reconnect it after 3 minutes. If this fault is still being displayed, contact your local service team.

This fault relates to power distribution. If you see this error code, open the inverter box and check the power distribution to see if a fuse has been damaged.

Open the box and check the power distribution, see if the signal cable of PV1-SPD and PV2-SPD has disconnected. If the fault still occurs, please contact our service department.

Check the open-circuit voltages of the strings, make sure it is lower than the Max. DC input voltage of the inverter; If the input voltage lies within the permitted range, and the fault still occurs, maybe the internal circuit has broken, contact our service department.

Disconnect the inverter from the grid and the PV array and reconnect after 3 minutes. If this fault is still being shown, contact your local service department.

This fault relates to the maximum operating temperature for your inverter. If you see this error code, check to ensure that the airflow to the heat sink is unobstructed and check to make sure the ambient temperature around the inverter isn’t too high.

Check the PV array’s insulation to ground and make sure that the insulation resistance to ground is greater than 1 MOhm. Otherwise, make a visual inspection of all PV cables and modules.
Make sure the grounding connection of the inverter is reliable. If this fault occurs often, contact your local service team.

Check the open-circuit voltages of the strings and make sure it is below the maximum DC input voltage of the inverter. If the input voltage lies within the permitted range and the fault still occurs, please contact service.

Make sure the grounding connection of the inverter is reliable.
Make a visual inspection of all PV cables and modules. If this fault is still shown, contact service.

Check the fuse and the triggering of the circuit breaker in the distribution box.
Check the grid voltage, grid usability.
Check the AC cable, grid connection on the inverter. If this fault is still being shown, contact service.

Check the grid voltage and grid connection on the inverter.
Check the grid voltage at the point of connection of the inverter. If the grid voltage is outside the permissible range due to local grid conditions, try to modify the values of the monitored operational limits after informing the electric utility company first. If the grid voltage lies within the permitted range and this fault still occurs, please contact service.

Frequent power fluctuations could cause this fault so check the grid frequency and make a note of how often major fluctuations occur. If major fluctuations are frequent, try to modify the operation parameters after informing the local grid operator.

Check the open-circuit voltages of the strings and make sure it is below the
maximum DC input voltage of the inverter. If the input voltage is within the permitted range and the fault still occurs, it might be that the internal circuit has broken. Contact service if the problem has not been solved.