SMA STP 8000TL-10 - Manual (Page 85)

SMA Solar Technology AG 12 Troubleshooting
Installation Manual STP8-17TL-IA-en-31 85
12.2 Checking the PV Array for Earth Faults
If the inverter displays event numbers "3501", "3601" or "3701", there is a high probability of an
earth fault in the PV array.
Check the strings for earth faults as described below:
1. Disconnect the inverter (see Section 9 "Disconnecting the Inverter from Voltage Sources",
page 63).
2. Measure the voltages between the positive pole of
each string and the earth potential (PE).
3. Measure the voltages between the negative pole of
each string and the earth potential (PE).
4. Measure the voltages between the positive and
negative poles of each string.
Danger to life due to live PV array.
• Only touch the cables of the PV array by their insulation.
• Do not connect strings with earth faults to the inverter.
Excessive voltages can destroy the multimeter
• Only use multimeters with a DC input voltage range up to at least 1,000 V.