How to claim FoxESS warranty in Pakistan, raise a support ticket, use FoxCloud for fault diagnosis, and get after-sales help for H1, H3, and KH series inverters.
| Fault Code / Message | Likely Cause | What to Do |
|---|---|---|
| Grid OV / Grid Voltage High | WAPDA grid voltage above inverter's upper limit (common during low-load nights in Punjab) | Ask your installer to raise the grid voltage upper limit in the commissioning settings. Usually safe to adjust to 260V or 270V. |
| Grid UV / Grid Voltage Low | WAPDA grid voltage dropping below lower limit (common during load-shedding transitions) | Lower the grid voltage minimum setting in commissioning. Also check whether a UPS or generator is creating a voltage conflict. |
| Meter Fault / Meter Communication | CT clamp (zero-export meter) disconnected, incorrectly oriented, or wiring loose | Check CT clamp orientation (arrow must point toward grid), ensure cable is plugged firmly into inverter's meter port. Replace CT if physically damaged. |
| PV Isolation Low | DC string insulation fault — moisture or damaged insulation on DC cables or MC4 connectors | Inspect all MC4 connectors for corrosion or water ingress. Check DC cable insulation along roof surface. This is a safety fault — do not ignore it. |
| BMS Communication Lost | CAN bus cable between inverter and battery is disconnected or faulty | Re-seat the CAN cable at both ends. Check for pinched or damaged cable. Restart inverter and battery after reseating. |
| Over Temperature | Inverter internal temperature too high — common in summer when installed without ventilation clearance | Ensure at least 15cm clearance above and below inverter. Do not install in direct sunlight. Check that cooling fans spin freely (listen for fan sound on startup). |
Always have your inverter serial number ready when contacting support. It's printed on a label on the right-hand side of the unit.
For FoxESS inverters and batteries installed by our team, contact us directly — we coordinate warranty claims and technical support with the distributor on your behalf. No need to chase the manufacturer yourself.