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What do the different Dura-I alarm codes mean?

When the inverter is in an alarm state, you will be able to see the details when locally connected and on the Dura-i App.

The various alert codes and suggested common causes and remedies are shown below:

Common Dura-i Inverter Alarms

 

 

A2 – Grid Absent

Wait until the power is restored

 

A9 – AC live and neutral reversed

  1. Check the wiring in the AC Grid Connector plug, ensuring cables aren’t crossed polarity.
  2. Ensure no AC Voltage is incoming between Neutral and Earth. If there is, you will need to check the wiring upstream of the inverter.

Note: If left without a corrective action this could potentially lead to a C3 alarm (where a component has blown on the inverter board) meaning a replacement unit may be necessary.

 

B7 – PV string reverse

Check and correct the polarity of the PV string.

 

C3 – Inverter relay abnormal

1. Check if live and neutral are the right way around in the grid plug.

2. If the alarm occurs occasionally, possibly the power grid voltage is abnormal temporarily, and no action is required.

3. If the alarm occurs repeatedly, please refer to the remedy for 'Grid over voltage' (A0) on page 104 of the Dura-i G3 Install Guide. If there is no abnormality on the grid side, a machine fault may be indicated. If the inverter fails to generate power, contact customer services.

 

CB – Internal communications error

1. If the alarm occurs occasionally, the inverter should automatically return to normal functionality and no action is required.

2. If the alarm occurs repeatedly, the inverter cannot work properly. Contact customer services.

 

CJ – Meter lost

CT:

1. Check that the CT clamp is installed correctly and in the correct port on the inverter.

2. Check the clamp is fully closed around the live of the AC grid supply.

3. If CT is extended, ensure you adhere to distances in Figure 52, page 39 of the Dura-I G3 Install Guide.

 

REM:

1. Check that the modbus communication address of the energy meter is consistent with that of the inverter.

2. The communication line is connected incorrectly or removing bad contact.

Note: Check the CT ratio matches that of the meter.

 

D3 – Battery under voltage

1. If the alarm occurs occasionally, the inverter should automatically return to normal functionality and no action is required.

2. Check the communication line connection between BMS and inverter (the Dura5 battery ).

3. The battery may be empty or the battery voltage lower than the SOC cutoff voltage.

4. Check that the battery positive and negative are connected properly.

5. Check that the DC isolator switch on the battery is on.

 

D8 – Communication error (Inverter-BMS)

1. Check the battery is connected correctly using the provided grey battery to inverter cable and that the labelled ends correspond with the device they are connected to. Do not use the black coms cable provided with the battery.

2. Check that the correct battery type is selected in Battery select.

Note: Check that the battery is switched on and the DC isolator is also on.

 

D9 – Internal communication loss (E-M)

1. Check whether the communication cables between AC OUTPUT, electricity meter and inverter are well connected and whether the wiring is correct (European units only).

2. Check whether the communication distance is within the specified range

3. Disconnect the external communication and restart the electricity meter and inverter.

4. Having checked the above, if the alarm continues to occur, please contact customer services.

 

D0 – Meter 2 lost or device – communication loss

1. Check the meter parameter Settings

2. Local App checks that the communication address of the inverter is consistent with that of the electricity meter

3. The communication line is connected incorrectly or in bad contact

4. This could be due to an electricity meter failure.

5. Excluding the above, if the alarm continues to occur, please contact customer services.

 

P1 – Parallel ID warning

Parallel ID Alarm. Check the parallel communication cable. Ensure all inverters are powered off completely, check the line, and then power on the inverters again to ensure that the alarm is cleared.

P2 – Parallel SYN signal warning

Parallel synchronization signal is abnormal. Check whether the parallel communication cable is properly connected.

P3 – Parallel BAT abnormal

The parallel battery is abnormal. Whether the battery of the inverter is reported low voltage or the battery is not connected.