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8. TROUBLE SHOOTING
In most situations, the Protect PV inverter requires very little service.
However, if Protect PV is not able to work perfectly, please refer to the
following instructions before calling your local AEG PS dealer.
• Should any problems arise, the red (Fault) LED on the front panel
turns on and the LCD displays the relevant information. Please refer
to the following table for a list of potential problems and their
solutions.
DISPLAY POSSIBLE ACTIONS
System Fault
Isolation Fault
1. Check the impedance is between PV (+) & PV (-) and the PV-
Inverter is earthed. The impedance must be greater than 8M
2. If the problem persists please call service
Ground I Fault
1. The ground current is too high.
2. Unplug the inputs from the PV generator and check the
peripheral AC system
3. After the cause is cleared, re-plug the PV panel and check
PV-Inverter status.
4. If the problem persists please call service.
Grid Fault
1. Wait for 5 minutes, if the grid returns to normal, PV-Inverter
automatically restarts.
2. Make sure grid voltage and frequency meet the specifications
3. If the problem persists please call service
Impedance Fault
1. Grid impedance higher than the permissible value.
2. Wait for 5 minutes, see if it works again.
3. Check the wires between the PV-Inverter and grid. Replace with
larger wires if necessary.
4. Adjust impedance parameter by Protect PV Data program.
5. If the problem persists please call service
No Utility
1. Grid is not connected.
2. Check grid connection cables.
3. Check grid usability.