This is the complete fault table for the Felicity IVPS/IVPM Series Inverter family — 19 codes shared by 12 model numbers, transcribed from the official manual. On Felicity units, a fault code means the unit has cut its output and the red LED stays solid; a warning flashes the red LED while the unit keeps running.
Last checked against the official manuals on July 10, 2026.
The inverter is overloaded and cuts off its output; the red LED is solid on.
CauseThe connected load exceeds the rated output power of the inverter while running in battery mode.
Recommended fixTurn off the inverter, decrease the load to less than the rated output power of the inverter, then turn the inverter on again. If the overload happens while the AC input is on, wait 30 seconds and the fault will clear automatically.
Source:IVPS-IVPM User Guide.pdf· page 17
The inverter output voltage is above the allowed range.
CauseInternal protection has triggered. Refer to the official product manual page listed on this code's source reference for the manufacturer's exact cause analysis.
Recommended fixRestart the inverter. If the fault persists, contact the repair center.
Source:IVPS-IVPM User Guide.pdf· page 17
A short circuit is detected on the inverter AC output.
CauseThe AC output wiring or a connected load is short-circuited.
Recommended fixIf the AC input is on, cut off the AC input first, then turn off the inverter, disconnect all AC output wiring and turn it on again. If the screen still displays the fault, contact the repair center. If the inverter can work again, check the output wiring and load and make sure none of them are short-circuited.
Source:IVPS-IVPM User Guide.pdf· page 17
The battery voltage is above the allowed maximum.
CauseThe battery voltage is too high; on a 48V system a reading above 60V indicates a battery problem.
Recommended fixRead the battery voltage from the screen and measure the battery voltage with a multimeter. If both readings are more than 60V, the battery may have a problem and you must stop using it.
Source:IVPS-IVPM User Guide.pdf· page 17
The internal temperature of the inverter is too high.
CauseThe inverter has overheated.
Recommended fixTurn off the inverter and let it cool down. After the temperature is back to normal you can use it again.
Source:IVPS-IVPM User Guide.pdf· page 17
Over current is detected while charging the battery.
CauseInternal protection has triggered. Refer to the official product manual page listed on this code's source reference for the manufacturer's exact cause analysis.
Recommended fixContact the repair center.
Source:IVPS-IVPM User Guide.pdf· page 17
The inverter soft start did not complete in time.
CauseInternal protection has triggered. Refer to the official product manual page listed on this code's source reference for the manufacturer's exact cause analysis.
Recommended fixContact the repair center.
Source:IVPS-IVPM User Guide.pdf· page 17
The inverter output voltage is below the allowed range.
CauseA high-power load is dragging the output voltage down, or an internal fault has triggered.
Recommended fixTurn off the inverter, disconnect all AC output wiring and then turn it on. If it still shows the fault, contact the repair center. If it works normally, check whether the output is connected to a big power load; disconnect the big load, turn on the inverter and confirm it can work normally.
Source:IVPS-IVPM User Guide.pdf· page 17
The internal current sensor reports an abnormal value.
CauseInternal protection has triggered. Refer to the official product manual page listed on this code's source reference for the manufacturer's exact cause analysis.
Recommended fixContact the repair center.
Source:IVPS-IVPM User Guide.pdf· page 17
Overload warning; the code flashes on the LCD and the red LED flashes.
CauseThe connected load is above the inverter's rated output power.
Recommended fixReduce the connected load. The inverter forbids overload; the remaining working time depends on the percent of load.
Source:IVPS-IVPM User Guide.pdf· page 18
The battery voltage is too low.
CauseThe battery is discharged below the low-voltage warning level.
Recommended fixThe voltage of the battery is too low; the battery should be charged.
Source:IVPS-IVPM User Guide.pdf· page 18
The inverter derates its output power because the utility voltage is low.
CauseThe AC input voltage is low (about 90-170V).
Recommended fixRead the voltage from the screen and confirm the voltage of the AC input is about 90-170V. If it is, the AC input voltage is low and the unit can work normally. If not, contact the repair center.
Source:IVPS-IVPM User Guide.pdf· page 18
The transformer temperature sensor (NTC) is disconnected.
CauseThe transformer temperature sensor wiring is disconnected or the sensor failed.
Recommended fixContact the repair center.
Source:IVPS-IVPM User Guide.pdf· page 18
The inverter temperature sensor (NTC) is disconnected.
CauseThe inverter temperature sensor wiring is disconnected or the sensor failed.
Recommended fixContact the repair center.
Source:IVPS-IVPM User Guide.pdf· page 18
The built-in MPPT charge controller reports charging over current.
CauseThe charging current of the built-in MPPT charge controller is too high.
Recommended fixCheck the PV array and battery configuration against the MPPT charging limits. If the warning persists, contact the repair center.
Source:IVPS-IVPM User Guide.pdf· page 18
The built-in MPPT charge controller reports battery low voltage.
CauseThe battery voltage measured by the built-in MPPT charge controller is too low.
Recommended fixCharge the battery and check the battery connections. If the warning persists, contact the repair center.
Source:IVPS-IVPM User Guide.pdf· page 18
The built-in MPPT charge controller reports battery high voltage.
CauseThe battery voltage measured by the built-in MPPT charge controller is too high.
Recommended fixCheck the battery voltage and the charger voltage settings. If the warning persists, contact the repair center.
Source:IVPS-IVPM User Guide.pdf· page 18
The built-in MPPT charge controller reports high temperature.
CauseThe built-in MPPT charge controller has overheated.
Recommended fixImprove ventilation and let the unit cool down. If the warning persists, contact the repair center.
Source:IVPS-IVPM User Guide.pdf· page 18
The built-in MPPT charge controller reports PV over voltage.
CauseThe PV input voltage to the built-in MPPT charge controller is too high.
Recommended fixReduce the number of PV modules in series so the PV voltage stays within the allowed range. If the warning persists, contact the repair center.
Source:IVPS-IVPM User Guide.pdf· page 18
Send us the code on your screen and a Felicity technician will reply with the exact steps for your unit. Support is free for life — a first diagnosis never needs a callout.
Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.