8 Disconnecting the Inverter from Voltage Sources
SMA America, LLC
58
SB3-5TLUS22-IA-en-10
Installation Manual
8 Disconnecting the Inverter from Voltage Sources
1. Switch off all external AC and DC circuit-breakers and the miniature circuit-breaker and secure
against re-connection.
2. Turn the rotary switch of the DC Disconnect to
Off
.
3. Wait until the LEDs and the display have gone out.
4. Loosen all six screws of the lower enclosure lid
using an Allen key (AF 3, metric) and remove the
enclosure lid.
6. Ensure that no voltage is present on the AC connecting terminal plate using a suitable measuring
device. Insert the test probe in each round opening of the terminal.
Danger to life due to high voltages in the inverter
Death or serious injury due to electric shock
• Only open the inverter in the order described here.
• Before performing any tasks, wait five minutes until the residual voltage has been drained.
5.
Electrostatic discharges can damage the inverter
The internal components of the inverter can be irreparably damaged by electrostatic discharge.
• Ground yourself before touching any components.
