7. Release and remove all DC connectors. Insert a
slotted screwdriver or an angled screwdriver
(blade width 3.5 mm) into one of the slide slots
and pull the DC connectors out downwards. Do
not pull on the cable.
8. Ensure that no voltage is present at the DC inputs of the inverter.
9. Use a suitable measuring device to check that no
voltage is present at the AC connecting terminal
plate between
L
and
N
and afterwards between
L
and
PE
. Insert the test probe (maximum
diameter: 2 mm) in each round opening of the
terminal.
10. Ensure that no voltage is present between any terminal of the multifunction relay and
PE
of the
AC connecting terminal plate.
11.
Damage to the inverter due to electrostatic discharge
The internal components of the inverter can be irreparably damaged by electrostatic
discharge.
• Ground yourself before touching any component.
9 Disconnecting the Inverter from Voltage Sources
SMA Solar Technology AG
Operating Manual
35
STP20-25TL-BE-en-10
