FoxESS S2000 - Troubleshooting; Routine maintenance

S Series User Manual www.fox-ess.com P a g e | 21
Fault Code
Solution
OCP
- 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.
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 fail
- 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.
Comm Lost
- Disconnect PV+, PV-, reconnect them.
- Or seek for help from us if it does not go back to normal state.
MS comm lost
- 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
- Check if the environment temperature is over the limit.
- Or seek for help from us.
7.2 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?
(2) Have the DC input breakers opened?
(3) Are the cables adequately sized?
(4) Are the input and output connections and wiring in good condition?
(5) Are the configurations settings correct for your particular installation?
(6) Are the display panel and the communications cable properly connected and undamaged?
Contact FoxESS Customer Service for further assistance. Please be prepared to describe details of your system
installation and provide the model and serial number of the unit.
7.3 Routine maintenance
➢ Safety check
A safety check should be performed at least every 12 months by a qualified technician who has adequate training,
knowledge and practical experience to perform these tests. The data should be recorded in an equipment log. If the
device is not functioning properly or fails any of the tests, the device has to be repaired. For safety check details, refer
to section 2 of this manual.