Performing The Vac Test - SMA NR-STP150H-ACCON Manual De Instrucciones

SMA Solar Technology AG
– Ensure that during the update the inverter shows Update host computer. This
notification is shown in the inverter display or in the event log in the Sunny Explorer.
☑ The inverter disconnects from the utility grid and does not feed in for 2 to
3 minutes.
– Ensure that the inverter runs through the start-up phase again.
– Reset the country data set to the original country data set via the rotary switches on
the inverter or via a communication product and, if necessary, adjust other
parameters according to the locally applicable standards and directives.
• To check the correct functioning of the SELV circuit, perform a fan test:
– Call up the user interface of the communication product or software and log in as
Installer or User.
– Select the parameters Device > Cooling system > Fan test. If the fan starts, the
SELV circuit is fault-free. If the fan does not start, contact Service.
• If the inverter is registered in a communication product or Sunny Portal, replace the
inverter in the communication product or Sunny Portal (see installation manual
"Replacement of SMA Devices in Systems with Communication Products" and where
necessary the replacement assistant in Sunny Portal at www.SMA-Solar.com).
19. Perform the VAC test (see Section 9, page 31).
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.
Replacement Manual
9 Performing the VAC Test
STPTL-30-H-AC-CON-RM-xx-10 31