SMA STP 15000TL Service Manual - Manual (Page 16)

Event number Display message, cause and corrective measures
4001 String X defect. > Do not disconn. ESS
There is reverse current in the string displayed or the polarity of this string is re-
versed. Further strings could also be affected. The PV array is short-circuited. In
exceptional circumstances, this error message may be triggered by soiling or
shading of the modules (e.g. by leaves or snow).
Corrective measures:
• Disconnect the inverter from voltage sources when it is dark (see
Section 2.2, page 7)
• Check the design and the circuitry of the PV array.
• If irradiation is sufficient, check whether the same voltage is present at the
DC inputs A1 to A5.
If the same voltage is not present, one of the PV modules is possibly
defective.
4002 String X low power > Check generator
String-failure detection has detected a failed or weak string.
Corrective measures:
• Test the string that is shown in the message.
4003 String X defect. > Do not disconn. ESS
String-failure detection has detected a failed or weak substring.
Corrective measures:
• Disconnect the inverter from all voltage sources (see Section 2.2, page 7)
.
• Check the design and the circuitry of the PV array.
• If irradiation is sufficient, check whether the same voltage is present at the
DC inputs A1 to A5.
If the same voltage is not present, one of the PV modules is possibly
defective.
4005 Part.str. X low p. > Check generator
String-failure detection has detected a failed or weak substring.
Corrective measures:
• Test the substring indicated in the message.
6001 to 6445 Self diagnosis > Interference device
The cause must be determined by the Service.
Corrective measures:
• Contact Service (see Section 15, page 43).
4 Troubleshooting SMA Solar Technology AG
Service Manual STP15-17TL-10-SG-en-10 16