Performing The Vac Test; Returning And Disposing Of The Defective Assembly - SMA Sunny Mini Central 9000TL Instrucciones Para La Sustitución

SMA Solar Technology AG
19. Carry out the necessary tests according to the locally applicable laws, standards and
directives for the correct recommissioning after power assembly replacement. Take the
requirements for component replacements into account (see Section 2.2 "IMPORTANT
SAFETY INSTRUCTIONS", page 8).
20. Ensure that the grounding conductor in the inverter is correctly connected and functions
properly.
21. After replacing the defective component, ensure operational and system safety in accordance
with the locally applicable electrotechnical rules.
22. Recommission the inverter (see inverter manual).
23. If the inverter is in a permanent operation inhibition signaled by the yellow LED glowing, reset
the permanent operation inhibition with a communication device. As a result, the inverter can
feed into the utility grid again.
24. To check the correct functioning of the SELV circuits, perform a fan test (see inverter manual).
25. Perform the VAC test (see Section 8, page 21).
8

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. 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.
2. Measure the AC voltage as close as possible to the inverter.
3. Compare the measured AC voltage and the AC voltage displayed on the inverter.
4. 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.
5. If the AC voltage shown by the inverter is not within the given range, contact the Service.
6. Ensure that the inverter feeds in correctly.
9

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:
Replacement Manual
8 Performing the VAC Test
AST-SMC9-11-RM-xx-10 21