SMA STP 15000TL - Manual (Page 31)

4.
Risk of fire due to reverse currents not being detected
The electronic string fuse monitors the PV array and protects it against dangerous reverse
currents which can cause a fire. In order to activate the electronic string fuse, you must observe
the following during DC connection:
• When connecting more than two strings, the first string must be connected to input B of
the inverter. This activates the string fuse.
• All strings must be clearly assigned to the correct DC input. Do not cross-wire or combine
the strings.
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. If there are more than two strings, connect the first assembled DC connector to input B. This
activates the string fuse.
☑ The green LED is flashing or glowing, no acoustic signal sounds and no error message is
displayed. The string fuse is activated and all remaining DC connectors can be
connected.
✖ The display does not show any data after a waiting period of at least 60 seconds and no
acoustic signal sounds?
The inverter is probably defective.
• Ensure that the DC input voltage is at least 188 V.
• Ensure that the DC connectors are not connected with reverse polarity.
• If the DC input voltage is sufficient and the DC connectors are connected correctly,
contact Service (see Section 13, page 56).
✖ An acoustic signal sounds and an error message with the event number 4001 appears in
the display?
The inverter short-circuits the PV array to avoid reverse currents through individual strings.
The PV array and the inverter are in a safe state.
• Do not remove the ESS and/or the DC connector under any circumstances. This
prevents an electric arc from forming which can cause injuries and a fire.
• Stop working on the inverter and wait until dark and until the acoustic signal no
longer sounds.
• If you would like to leave the PV system to continue work when it is dark, set up
protection against contact (e.g. a fence) and protect the inverter against penetrating
moisture (e.g. with tarp).
• Only remove the ESS and all DC connectors and correct the connection once it is
dark.
✖ An acoustic signal sounds and an error message with the event number 6313 or 8201
appears in the display?
• Contact Service (see Section 13, page 56).
6 Electrical Connection SMA Solar Technology AG
Operating Manual 31 STP15-17TL-10-BE-en-10