SMA SUNNY TRIPOWER CORE1 - 11.3 Checking the PV System for Ground Faults

11 Troubleshooting
SMA Solar Technology AG
Operating manual STP50-40-BE-en-15 97
Event number Message, cause and corrective measures
27107
Update file OK
The update file found is valid.
27301
Update communication
The inverter is updating the communication component.
27302
Update main CPU
The inverter is updating the inverter component.
27312
Update completed
The inverter has successfully completed the update.
29001
Inst. code valid
The entered GridGuard code is valid. Protected parameters have now been
unlocked and you can adjust the parameters. The parameters will be automati-
cally locked again after ten feed-in hours.
29004
Grid parameters unchanged
Changing the grid parameters is not possible.
11.3 Checking the PV System for Ground Faults
If the red LED is glowing and the event number 3501, 3601 or 3701 is being displayed in the
Results menu on the inverter user interface, there may be a ground fault present. The electrical
insulation from the PV system to ground is defective or insufficient.
DANGER
Danger to life due to electric shock when touching live system components in
case of a ground fault
If a ground fault occurs, parts of the system may still be live. Touching live parts and cables
results in death or lethal injuries due to electric shock.
• Disconnect the product from voltage sources and make sure it cannot be reconnected
before working on the device.
• Touch the cables of the PV array on the insulation only.
• Do not touch any parts of the substructure or frame of the PV array.
• Do not connect PV strings with ground faults to the inverter.