SMA 20000TL - Manual (Page 42)

11. 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.
12. Ensure that no voltage is present at the DC inputs of the inverter.
13. Use an appropriate measuring device to ensure
that no voltage is present at the AC connecting
terminal plate between L1 and N, L2 and N,
and L3 and N. Insert the test probe of the
multimeter into the round opening of the
terminal.
14. Use an appropriate measuring device to ensure that no voltage is present at the AC
connecting terminal plate between L1 and PE, L2 and PE, and L3 and PE. Insert the test
probe into the round opening of each terminal.
15. Ensure that no voltage is present between any terminal of the multifunction relay and PE of the
AC connecting terminal plate.
16.
Danger to life due to high voltages in the inverter
The capacitors in the inverter take 20 minutes to discharge.
• Wait 20 minutes before opening the upper enclosure lid.
• Do not open the DC protective cover.
17.
Damage to the inverter due to electrostatic discharge
Touching electronic components can cause damage to or destroy the inverter through
electrostatic discharge.
• Ground yourself before touching any component.
9 Disconnecting the Inverter from Voltage Sources SMA Solar Technology AG
Operating Manual STP20-25TL-BE-en-12 42