SMA SB 3000TL - Manual (Page 29)

Damage to the DC connectors due the use of contact cleaner of other cleaning agents
Some contact cleaners or other cleaning agents may contain substances that decompose the
plastic of the DC connectors.
• Do not use contact cleaners or other cleaning agents for cleaning the DC connectors.
Procedure:
1. Ensure that the circuit breaker is switched off and that it cannot be reconnected.
2. If an additional DC load-break switch is available, switch off the DC load-break switch and
secure against reconnection.
3. If the ESS is installed and plugged in, remove the ESS.
4. Ensure that there is no ground fault in the PV array (see service manual at www.SMA-
Solar.com).
5. Check whether the DC connectors have the correct polarity.
If the DC connector is equipped with a DC cable of the wrong polarity, the DC connector must
be assembled again. The DC cable must always have the same polarity as the DC connector.
6. Ensure that the open-circuit voltage of the PV array does not exceed the maximum input
voltage.
7. Connect the assembled DC connectors to the inverter.
☑ The DC connectors snap into place.
8. Ensure that all DC connectors are securely in place.
6 Electrical Connection SMA Solar Technology AG
Operating Manual 29 SB30-50TL-21-BE-en-11