SMA SB 3300 Installation - Manual (Page 11)

SMA Solar Technology AG Safety
Installation Guide SB33_38-IEN111851 11
2.3 Explanation of Symbols
This section gives an explanation of all the symbols found on the inverter and on the type plate.
2.3.1 Symbols on the Inverter
Symbol Explanation
Operation Display.
Indicates the operating state of the inverter.
Ground fault or varistor defective.
Read section 9.3 ”Red LED is Glowing Continuously” (page 58).
Error or disturbance.
Read section 9 ”Troubleshooting” (page 52).
Tap to switch on the display light and switch to the next display message.
Electronic Solar Switch (ESS) DC load disconnection unit
• When the Electronic Solar Switch is plugged in, the DC circuit is
closed.
• In order to interrupt the DC circuit and disconnect the inverter
securely under load, first pull out the Electronic Solar Switch and
then remove all DC plug connectors , as described in section
7.2 ”Opening the Inverter” (page 43).