SMA SMC 7000HV Installation - Manual (Page 75)

SMA Solar Technology AG Troubleshooting
Installation Manual SMC70HV11-IA-IEN112970 75
Location of the ground fault
The approximate position of the ground fault can be determined from the ratio of the measured
voltages between the plus pole against ground potential (PE) and the minus pole against
ground potential (PE).
Example:
In this case, the ground fault is between the second and third PV modules.
☑ The ground fault check is finished.
Result Measure
☑ You have found a ground fault. • The installer of the PV array must remedy
the ground fault in the affected string.
You can determine the location of the
ground fault as described below.
• Do not reconnect the faulty string.
• Close the inverter and commission it as
described in section 7.3 "Closing the
Inverter" (page 59).
☑ You have found no ground fault. It is likely that one of the thermally monitored
varistors is defective.
• Check the varistors as described in section
9.3.2 "Checking the Function of the
Varistors" (page 76).