SMA Solar Technology AG 9 Opening and Closing
Installation Manual SB30-50TL-21-IA-en-21 63
9 Opening and Closing
9.1 Safety
Danger to life due to high voltages in the inverter
Before opening the inverter, observe the following:
• Disconnect the miniature circuit-breaker and secure against reconnection.
If a multi-function relay is connected, disconnect its supply voltage and ensure that it cannot be
reconnected.
Danger to life due to electric shock.
If the DC connectors are pulled out without first disconnecting the ESS or switching off the external
DC switch-disconnector, a dangerous electric arc can occur.
• Disconnect the ESS or switch off the external DC
switch-disconnector first.
• Then, open the lower enclosure lid and remove
the DC connectors.
Electrostatic discharge can damage the inverter
The internal components of the inverter can be irreparably damaged by electrostatic discharge.
• Earth yourself before touching any components.
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