What to do if REFU 801 shows GFCI Fault?
If the GFCI fault occurs occasionally, it might be due to temporary external circuit issues, and the inverter should automatically return to normal once the problem is resolved. However, if the fault happens frequently and persists, inspect the insulation resistance between the PV array and earth (ground). Also, check the insulation of your PV cables.
What to do if my REFU 801 Inverter temperature is too high?
Check if the ambient temperature where the inverter is installed exceeds the upper limit. If it does, improve ventilation to lower the temperature.
What to do if REFU 801 Inverter input voltage is too high?
Check if too many PV modules are connected in series in a PV string, causing the voltage (Voc) of the PV string to exceed the inverter's maximum input voltage. If so, adjust the number of PV modules connected in series to bring the PV string voltage within the inverter's acceptable input range. The inverter should automatically return to normal operation after these adjustments.
What to do if REFU 801 input voltage is too low?
Check if too few PV modules are series connected in a PV string, causing the voltage (Vmp) of the PV string to be lower than the minimum operating voltage of the inverter. If this is the case, adjust the number of series connected PV modules to increase the voltage of the PV string to fit the input voltage range of the inverter. The inverter will automatically return to normal operating status after correct adjustments.
Why is my REFU 801 Inverter derating because of high temperature?
Ensure the installation position and installation method meet the requirements of Section 3.4 of this user manual. Check whether the ambient temperature of the installation position exceeds the upper limit. If yes, improve ventilation to decrease the temperature.
What to do if REFU 801 Inverter grid current is too high and has caused an unrecoverable hardware fault?
Turn OFF the „DC switch”, wait for 5 minutes, then turn ON the „DC switch”. Check whether the fault is rectified. If no, please contact technical support.
What to do if REFU 801 grid current is too high and hardware protection has been triggered?
Turn OFF the „DC switch”, wait for 5 minutes, then turn ON the „DC switch”. Check whether the fault is rectified. If no, please contact technical support.
What to do if REFU 801 power grid voltage is too low?
If the alarm occurs frequently, check whether the grid voltage/frequency is within the acceptable range. If no, contact technical support. If yes, check the AC circuit breaker and AC wiring of the inverter.
What to do if REFU Inverter power grid frequency is too high?
If the grid voltage/frequency is within the acceptable range and AC wiring is correct, while the alarm occurs repeatedly, contact technical support to change the grid over-voltage, under-voltage, over-frequency.
What to do if REFU 801 input current is too high, and hardware protection has occurred?
Check if the input current exceeds the inverter's maximum input current, then check the input wiring, if both are correct, please contact technical support.
General| Model | REFU 801 Series |
|---|---|
| Category | Inverter |
| Protection Class | IP65 |
| Communication Interfaces | RS485, Ethernet |
| Ambient Temperature | -25°C to +60°C |
| Output Voltage | 400 VAC |
| Frequency Range | 50 Hz / 60 Hz |
| Cooling Method | Convection |
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