FoxESS S700-G2 - Troubleshooting

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Grid Voltage Fault
- Wait for one minute, grid may go back to normal working state.
- Make sure that grid voltage and frequency complies with standards.
- Or, please seek for help from us.
Consistent Fault
- Disconnect PV (+), PV (-) with DC.
- After the LCD switches off, reconnect and check again.
- Please seek for help from us if it cannot go back to normal state.
ISO Fault
- Check the impedance among PV (+), PV (-) and ground. Impedance
should be >1Mohm.
- Please seek for help from us if it cannot be detected or the impedance is
<1Mohm.
Ground Fault
- Check the voltage of neutral and PE.
- Check AC wiring.
- Restart inverter, if error message persists, seek for help from us.
OCP Fault
- Turn off the PV and grid, reconnect them.
- Or seek for help from us if it does not go back to normal.
PLL Fault
- System will reconnect if the utility is back to normal.
- Or seek for help from us if it does not go back to normal state.
Fault Code
Solution
PV OVP
- Check the panel’s open-circuit voltage whether the value is similar or
already >550Vdc.
- Please seek help from us when voltage ≤550Vdc.
Relay Fault
- Disconnect PV (+), PV (-) with DC.
- After the LCD switches off, reconnect and check again.
- Please seek for help from us if it does not go back to normal state.
Sample Fault
- Disconnect PV (+), PV (-) with DC.
- After the LCD switches off, reconnect and check again.
- Please seek for help from us if it cannot go back to normal state.
SCI Fault
- Disconnect PV+, PV-, reconnect them.
- Or seek for help from us if it does not go back to normal state.
SPI Fault
- Disconnect PV (+), PV (-) with DC.
- After the LCD switches off, reconnect and check again.
- Please seek for help from us if it cannot go back to normal state.
Over Temp Fault
- Check if the environment temperature is over the limit.
- Or seek for help from us.
8.2 Troubleshooting
a. Please check the fault message on the System Control Panel or the fault code on the inverter
information panel. If a message is displayed, record it before doing anything further.
b. Attempt the solution indicated in table above.
c. If your inverter information panel is not displaying a fault light, check the following to make sure that
the current state of the installation allows for proper operation of the unit:
(1) Is the inverter located in a clean, dry, adequately ventilated place?