12 Disconnecting the Inverter from Voltage Sources
SMA Solar Technology AG
Operating manual
SI44M-80H-13-BE-en-15
126
12 Disconnecting the Inverter from Voltage Sources
Procedure:
1. Stop the system: At the master, or at the master of the main cluster, press the "Start-Stop" button until an acoustic
signal sounds.
2. If the orange LEDs for the inverter are lit on all devices, the system has been stopped.
3. Switch off Sunny Island: On the master, or on the master of the main cluster, press the "Off" button until an
acoustic signal sounds.
4. If the inverter LED is no longer lit on any of the devices, the devices have been switched off.
5. Disconnect the circuit breakers and the load-break switches in the sub-distributions and secure against
reconnection.
6. Open the load-break switch in the battery fuse and secure against reconnection.
7. Wait 15 minutes. This enables electric discharge of the capacitors in the inverter.
8.
NOTICE
Destruction of the Sunny Island inverter due to electrostatic discharge (ESD)
By touching electronic components within the Sunny Island, you can damage or destroy the Sunny Island.
• Ground yourself before touching any component.
9. Unscrew all six screws of the enclosure lid using an Allen key (AF 5) and remove the enclosure lid.
10. Ensure that no voltage is present between
DC+
and
DC-
.
11. Ensure that no voltage is present at the
AC1
and
AC2
terminals.
12. Ensure that no voltage is present at the
ExtVtg
terminal.
13. Ensure that no voltage is present at the
Relay1
and
Relay2
terminals.
14. Ensure that no voltage is present at the
BatTmp
,
BatCur
,
BatVtg
and
DigIn
terminals.
15. Ground and short-circuit the AC power cables outside the Sunny Island.
16. Cover or isolate any adjacent live components.
