SMA NR-STP200FCH-AST Instrucciones Para La Sustitución página 25

SMA Solar Technology AG
17. Perform the respective measures indicated when the following LED status appears:
LED status
Green LED is
flashing
The red LED is
glowing and an
error and event
message appear
in the display.
18. After replacing the assembly, check the correct functioning of the SELV circuit. Activate the fan
test for this purpose:
• 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.
• To check the fault-less functioning of the SELV circuits, check the functioning of
communication (see inverter manual).
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.
Replacement Manual
Cause
The DC input voltage may still be
too low or the inverter is monitoring
the utility grid.
The inverter has detected an error.
8 Performing the VAC Test
Measures
Wait that the DC input voltage is suf-
ficiently high and the grid-connec-
tion conditions are met. Then the in-
verter will start operation automati-
cally.
Eliminate the error (see the inverter
manual).
STPTLEE-10-AST-RM-xx-10 25