SMA Inverter Error Codes

The grid voltage or grid impedance at the connection point of the inverter is too high. The inverter has disconnected from the utility grid.

Corrective measures:
1. Check whether the grid voltage at the connection point of the inverter is permanently in the permissible range.
2. If the grid voltage is outside the permissible range due to local grid conditions, contact the grid operator. The grid operator must agree with an adjustment of the voltage at the feed-in point or with a change of the monitored operating limits.
3. If the grid voltage is permanently within the permissible range and this message is still displayed, contact Service.

The utility grid has been disconnected, the AC cable is damaged or the grid voltage at the connection point of the inverter is too low. The inverter has disconnected from the utility grid.

Corrective measures:
1. Ensure that the circuit breaker is switched on.
2. Ensure that the AC cable is not damaged and that it is connected correctly.
3. Ensure that the country data set has been configured correctly.
4. Check whether the grid voltage at the connection point of the inverter is permanently in the permissible range.
5. If the grid voltage is outside the permissible range due to local grid conditions, contact the grid operator. The grid operator must agree with an adjustment of the voltage at the feed-in point or with a change of the monitored operating limits.
6. If the grid voltage is permanently within the permissible range and this message is still displayed, contact the Service.

The ten-minute average value of the grid voltage is no longer within the permissible range. The grid voltage or grid impedance at the connection point is too high. The inverter disconnects from the utility grid to maintain power quality.

Corrective measures:
1. During the feed-in operation, check whether the grid voltage at the connection point of the inverter is permanently in the permissible range.
2. If the grid voltage is outside the permissible range due to local grid conditions, contact the grid operator. The grid operator must agree with an adjustment of the voltage at the feed-in point or with a change of the monitored operating limits.
3. If the grid voltage is permanently within the permissible range and this message is still displayed, contact Service.

The inverter has reduced its power due to a too-high grid voltage to ensure grid stability.

Corrective measures:
1. If possible, check the grid voltage and observe how often fluctuations occur. If fluctuations occur frequently and this message is displayed often, contact the grid operator and request approval to change the operating parameters of the inverter. If the grid operator gives his approval, discuss any changes to the operating parameters with the Service.

The inverter has disconnected from the utility grid. A stand-alone grid or a very large change in the power frequency was detected.

Corrective measures:
1. Check the grid connection for significant short-term frequency fluctuations.

The power frequency is not within the permissible range. The inverter has disconnected from the utility grid.

Corrective measures:
1. If possible, check the power frequency and observe how often fluctuations occur.
2. If fluctuations occur frequently and this message is displayed often, contact the grid operator and request approval to change the operating parameters of the inverter.
3. If the grid operator gives his approval, discuss any changes to the operating parameters with the Service.

The inverter has detected an excessively high proportion of direct current in the grid current.

Corrective measures:
1. Check the grid connection for direct current.
2. If this message is displayed frequently, contact the grid operator and check whether the monitoring threshold on the inverter can be raised.

The power frequency is not within the permissible range. The inverter has disconnected from the utility grid.

Corrective measures:
1. If possible, check the power frequency and observe how often fluctuations occur.
2. If fluctuations occur frequently and this message is displayed often, contact the grid operator and request approval to change the operating parameters of the inverter.
3. If the grid operator gives his approval, discuss any changes to the operating parameters with the Service.

The grounding conductor is not correctly connected.

Corrective measures:
1. Ensure that the grounding conductor is correctly connected.

The connection of L and N is swapped.

Corrective measures:
1. Ensure that L and N are correctly connected.

A second line conductor is connected to N.

Corrective measures:
1. Connect the neutral conductor to N.

L or N not connected.

Corrective measures:
1. Ensure that L and N are connected.
2. Ensure that the circuit breaker is switched on.
3. Ensure that the AC cable is not damaged and that it is connected correctly.

The changed country data set or the value of a parameter you have set does not correspond to the local requirements. The inverter cannot connect to the utility grid.

Corrective measures:
1. Ensure that the country data set has been configured correctly. To do this, select the parameter Set country standard and check the value.

There is not enough power at the DC input of the inverter for stable operation. The inverter cannot connect to the utility grid.

Corrective measures:
1. Ensure that the PV array is designed correctly.
2. Ensure that the PV array is not covered by snow or otherwise shaded.
3. Ensure that the PV array is free of errors.

Overvoltage at the DC input. This can destroy the inverter.

This message is signalized additionally by rapid flashing of the LEDs.

Corrective measures:
1. Immediately disconnect the inverter from all voltage sources.
2. Check whether the DC voltage is below the maximum input voltage of the inverter. If the DC voltage is below the maximum input voltage of the inverter, reconnect the DC connectors to the inverter.
3. If the DC voltage exceeds the maximum input voltage of the inverter, ensure that the PV array has been correctly rated or contact the installer of the PV array.
4. If this message is repeated frequently, contact the Service.

The inverter has detected a ground fault in the PV array.

Corrective measures:
1. Check the PV system for ground faults.

The inverter has detected a residual current due to temporary grounding of the PV array.

Corrective measures:
1. Check the PV system for ground faults.

Overcurrent at the DC input. The inverter briefly interrupts feed-in operation.

Corrective measures:
1. If this message is displayed frequently, ensure that the PV array has been correctly rated and wired.

The feed-in conditions for the utility grid are not yet fulfilled.

Corrective measures:
1. Ensure that the PV array is not covered by snow or otherwise shaded.
2. Wait for higher irradiation.
3. If this message is displayed frequently in the morning, increase the voltage limit for starting grid feed-in. Change the parameter Critical voltage to start feed-in.
4. If this message is displayed frequently with medium irradiation, ensure that the PV array is correctly rated.

The DC inputs A and B are connected in parallel.

The DC inputs A and B are not connected in parallel.

The cause must be determined by the Service.

Corrective measures:
Contact the Service.

The inverter has switched off due to excessive temperature.

Corrective measures:
Clean the cooling fins on the rear of the enclosure and the air ducts on the top using a soft brush.
Ensure that the inverter has sufficient ventilation.
Ensure that the ambient temperature does not exceed +40 °.
Ensure that the inverter is not exposed to direct solar irradiation.

The inverter will only recommence grid feed-in once the temperature has reached at least −25°C.

The cause must be determined by the Service.

Corrective measures:
Contact the Service.

Corrective measures:
Check whether a string is connected to input A.
Contact the service.

Corrective measures:
Check whether a string is connected to input B.
Contact the service.

Error in the communication processor, the inverter continues feeding in, however. The cause must be determined by the Service.

Corrective measures:
If this message is displayed frequently, contact the Service.

The parameter file was not found or is defective. The update failed. The inverter continues to feed in.

Corrective measures:
Copy the parameter file to the correct folder again.

Parameters could not be set using the memory card. The inverter continues to feed in.

Corrective measures:
Ensure that the parameters are set correctly.
Ensure that the SMA Grid Guard code is available.

The update file is defective. The update failed. The inverter continues to feed in.

No new update file was found on the SD memory card. The update failed. The inverter continues to feed in.

The cause must be determined by the Service.

Corrective measures:
Contact the Service.

The firmware update was completed successfully.

The testing of the update conditions was successful. The firmware update package is suitable for this inverter.

Update file is being copied.

Update file was copied successfully to the inverter’s internal memory.

Update file could not be copied to the inverter’s internal memory. In the event of connection with the inverter via WLAN, a poor connection quality can be the cause.

Corrective measures:
Retry update.
For WLAN connection: Improve the WLAN connection quality (e.g., via WLAN repeater) or establish a connection with the inverter via Ethernet.
If this message is displayed again, contact the Service.

The inverter is performing a bootloader update.

The bootloader update failed.

Corrective measures:
Retry update.
If this message is displayed again, contact the Service.

The configuration file is not suitable for this inverter.

Corrective measures:
Ensure that the selected configuration file is suitable for this inverter.
Retry import.

The configuration file is not of the required format or is damaged.

Corrective measures:
Ensure that the selected configuration file is of the required format and is not damaged.
Retry import.

The user group logged in does not have the user rights necessary to be able to import a configuration.

Corrective measures:
Log in as Installer.
Import configuration file again.

The configuration file is being transferred.

The inverter is updating the WLAN module.

The update of the WLAN module failed.

Corrective measures:
Retry update.
If this message is displayed again, contact the Service.

The inverter is updating the time zone database.

The update of the time zone database failed.

Corrective measures:
Retry update.
If this message is displayed again, contact the Service.

The inverter is updating the inverter user interface.

The update of the inverter user interface failed.

Corrective measures:
Retry update.
If this message is displayed again, contact the Service.

Corrective measures:
Contact the Service.

The inverter is not receiving any data from the energy meter.

Corrective measures:
Ensure that the energy meter is correctly integrated into the same network as the inverter (see energy meter manual).
For WLAN connection: Improve the WLAN connection quality (e.g., via WLAN repeater) or connect the inverter with the DHCP server (router) via Ethernet.

The cause must be determined by the Service.

Corrective measures:
Contact the Service.

The inverter has reduced its power output for more than ten minutes due to excessive temperature.

Corrective measures:
Clean the cooling fins on the rear of the enclosure and the air ducts on the top using a soft brush.
Ensure that the inverter has sufficient ventilation.
Ensure that the ambient temperature does not exceed +40 °.
Ensure that the inverter is not exposed to direct solar irradiation.

The cause must be determined by the Service.

Corrective measures:
Contact the Service.

The SMA Grid Guard code entered is incorrect. The operating parameters are still protected and cannot be changed.

Corrective measures:
Enter the correct SMA Grid Guard code.

Changes to the grid parameters are now blocked. In order to be able to make changes to the grid parameters, from now on you must log in using the SMA Grid Guard code.

This error can have the following causes:
The parameters to be changed are protected.
The DC voltage at the DC input is not sufficient to run the main CPU.

Corrective measures:
Enter the SMA Grid Guard code.
Ensure that at least the DC start voltage is available (green LED is flashing, pulsing or glowing).

The self-test (Italy only) was terminated.

Corrective measures:
Ensure that the AC connection is correct.
Restart the self-test.

No time information could be called up from the set NTP server.

Corrective measures:
Ensure that the NTP server was configured correctly.
Ensure that the inverter is integrated into a local network with an Internet connection.

The network is busy. Data exchange between the devices is not at an optimum and is greatly delayed.

Corrective measures:
Increase the query intervals.
If necessary, reduce the number of devices in the network.

The network is overloaded. There is no data exchange between the devices.

Corrective measures:
Reduce the number of devices in the network.
If necessary, increase the data query intervals.

The package error rate has changed. If the package error rate is high, the network is overloaded or the connection to the network switch or DHCP server (router) is disturbed.

Corrective measures if the package error rate is high:
Ensure that with an Ethernet connection, the network cable and the network connector are not damaged and that the network connectors are correctly plugged.
If necessary, increase the data query intervals.
If necessary, reduce the number of devices in the network.

The communication status to the network switch or DHCP server (router) has changed. An additional error message may be displayed.

There is no valid signal on the network line.

Corrective measures:
Ensure that with an Ethernet connection, the network cable and the network connector are not damaged and that the network connectors are correctly plugged.
Ensure that the DHCP server (router) and any network switches are signalizing correct operation.

The data transfer rate has changed. The cause for the status [10 Mbit] can be a defective plug, a defective cable, or the pulling or plugging of the network connector.

Corrective measures if the status is [10 Mbit]:
Ensure that with an Ethernet connection, the network cable and the network connector are not damaged and that the network connectors are correctly plugged.
Ensure that the DHCP server (router) and any network switches are signalizing correct operation.

The duplex mode (data transfer mode) has changed. The cause for the status [Half] can be a defective plug, a defective cable, or the pulling or plugging of the network connector.

Corrective measures if the status is [Half]:
Ensure that with an Ethernet connection, the network cable and the network connector are not damaged and that the network connectors are correctly plugged.
Ensure that the DHCP server (router) and any network switches are signalizing correct operation.

After several incorrect login attempts, login has been blocked for a limited time. In this case, the User login will be blocked for 15 minutes, the Grid Guard login for 12 hours.

Corrective measures:
Wait until the given time has expired and then retry login.

The WLAN module integrated in the inverter is defective.

Corrective measures:
Contact the Service.

The inverter does not currently have a WLAN connection to the selected network.

Corrective measures:
Ensure that the SSID, the WLAN password, and the encryption method have been entered correctly. The encryption method is specified by your WLAN router or WLAN Access Point and can be changed there.
Ensure that the WLAN router or WLAN Access Point is in range and is signalizing correct operation.
If this message is displayed often, improve the WLAN connection by using a WLAN repeater.

The inverter has lost WLAN connection to the selected network.

Corrective measures:
Ensure that the WLAN router or WLAN Access Point is still active.
Ensure that the WLAN router or WLAN Access Point is in range and is signalizing correct operation.
If this message is displayed often, improve the WLAN connection by using a WLAN repeater.

The inverter has reduced its power due to a too-high power frequency to ensure grid stability.

Corrective measures:
If possible, check the power frequency and observe how often fluctuations occur. If fluctuations occur frequently and this message is displayed often, contact the grid operator and request approval to change the operating parameters of the inverter. If the grid operator gives his approval, discuss any changes to the operating parameters with the Service.

The parameter changes are being adopted.