SMA NR3-STP-AC-CON Bedienungsanleitung Seite 24

9 Performing the VAC Test
9 Performing the VAC Test
Due to the replacement of the assembly, elements in the supply voltage measurement area were
replaced. To ensure that the supply voltage measurement in the inverter has the required accuracy,
the installer must carry out a VAC test.
The VAC test compares the AC voltage present in the utility grid with the AC voltage measured by
the inverter. The inverter may display up to 5 V more or 1 V less than the applied AC voltage.
Requirements:
☐ A measuring device suitable for the VAC measurement must be available.
☐ During measurement, devices causing fluctuations in the utility grid (e.g. other inverters) must
be switched off or set to Stop.
Procedure:
1. Log into a communication product (e.g. Sunny Explorer) using the "Installer" user group and
establish a connection to the inverter (refer to the communication product manual).
2. Set the parameter Operating mode from MPP to Stop.
3. Make sure that the VAC voltage measured by the inverter is displayed. This can be done on
the display of the inverter or via the communication product.
4. Measure the AC voltage as close as possible to the inverter.
5. Compare the measured AC voltage and the AC voltage displayed on the inverter.
6. Check if the AC voltage shown on the inverter is no more than 5 V above or no more than 1 V
below the measured AC voltage.
7. If the AC voltage shown by the inverter is not within the given range, contact the Service.
8. Set the parameter Operating mode from Stop to MPP.
9. Ensure that the inverter feeds in correctly.
10 Returning and Disposing of the Defective Assembly
If the defective assembly is to be returned, this will be stated on the order form.
Procedure:
1. If the defective assembly is to be returned:
• Pack the defective assembly for shipping. Use the original packaging for this, or
packaging that is suitable for the weight and size of the assembly.
• Organize the return shipment to SMA Solar Technology AG. Contact the Service.
2. If the assembly is not to be returned, dispose of the assembly in accordance with the locally
applicable disposal regulations for electronic waste.
24 ACCON-STPTL10-RM-xx-10
SMA Solar Technology AG
Replacement Manual