This is the complete fault table for the Felicity IVEM8048-II Inverter family — 56 codes shared by 3 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.
Fault: Bus voltage is too high. Inverter cuts off output, fault LED solid on, ERROR icon shown on LCD.
CauseAC Surge or internal components failed.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 42
Fault: Bus voltage is too low.
CauseInternal bus voltage abnormally low.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: Bus soft start fail.
CauseInternal components failed.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: Inverter soft start fail.
CauseInternal components failed.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: Over current or surge detected by Software.
CauseSoftware-detected over current or surge condition.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: Over current or surge detected by hardware.
CauseHardware-detected over current or surge condition.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: Output voltage is too low.
CauseOutput voltage below acceptable range, possibly due to overload.
Recommended fixReduce the connected load. Restart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: Output voltage is too high.
CauseOutput voltage exceeds acceptable range.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: Output short circuited.
CauseShort circuit on AC output wiring or connected load.
Recommended fixCheck if wiring is connected well and remove abnormal load.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: Overload time out.
CauseConnected load has exceeded the inverter's overload capacity for too long.
Recommended fixReduce the connected load by switching off some equipment.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: Battery voltage is too high.
CauseBattery voltage exceeds the inverter's allowed maximum.
Recommended fixCheck if spec and quantity of batteries are meet requirements.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: Over current happen at DC/DC circuit.
CauseOver current detected in the DC/DC converter circuit.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: PV voltage is too high.
CausePV array open-circuit voltage exceeds the inverter's maximum input voltage.
Recommended fixReduce the number of PV modules in series.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: Short circuited happen at PV port.
CauseShort circuit detected at the PV input port or wiring.
Recommended fixCheck if wiring is connected well.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: PV power is abnormal.
CausePV input power exceeds the inverter's allowed maximum.
Recommended fixReduce the number of PV modules.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: Over current happen at PV port.
CauseOver current detected at the PV input port.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: Fan is locked.
CauseFan wiring not connected well or fan failure.
Recommended fixCheck if wiring is connected well. Replace the fan.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: Over temperature happen at PV circuit.
CauseThe temperature of internal PV component is over the limitation.
Recommended fixCheck whether the air flow of the unit is blocked or whether the ambient temperature is too high.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: Over temperature happen at Convert L circuit.
CauseThe temperature of Convert L battery converter component is over the limitation.
Recommended fixCheck whether the air flow of the unit is blocked or whether the ambient temperature is too high.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: Over temperature happen at INV circuit.
CauseThe temperature of internal INV component is over the limitation.
Recommended fixCheck whether the air flow of the unit is blocked or whether the ambient temperature is too high.
Source:IVEM8K-12K-II_compressed.pdf· page 43
Fault: The inner temperature over.
CauseThe inner temperature is over the limitation.
Recommended fixCheck whether the air flow of the unit is blocked or whether the ambient temperature is too high.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: DCDC current sensor failed.
CauseDCDC current sensor failure.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: No.2 DCDC current sensor failed.
CauseSecond DCDC current sensor failure.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: Inverter current sensor failed.
CauseInverter current sensor failure.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: OP current sensor failed.
CauseOutput current sensor failure.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: Sharing current sensor failed.
CauseCurrent-sharing sensor failure (parallel system).
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: The AC input and output wires are inversely connected.
CauseAC input and output wires connected reversely.
Recommended fix1. Please check AC input and output wires are connected correctly. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please funish parallel installation first, and then restart inverters. 3. if the problem remains, please contact your installer.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: Single unit is installed to parallel system.
CauseA single unit is detected as installed in a parallel system.
Recommended fix1. Please check if single unit is installed to parallel system. 2. if this error happens during parallel installation, please check wires connectiotn. if they are connected correctly, please funish parallel installation first, and then restart inverters. 3. if the problem remains, please contact your installer.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: DC/DC soft start fail.
CauseDC/DC converter soft start failure.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: Over temperature happen at convert H circuit.
CauseThe temperature of internal convert H component is over the limitation.
Recommended fixCheck whether the air flow of the unit is blocked or whether the ambient temperature is too high.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: Over temperature happen at LLC TX.
CauseThe temperature of internal DC/DC TX is over the limitation.
Recommended fixCheck whether the air flow of the unit is blocked or whether the ambient temperature is too high.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: Over current happen at LLC circuit.
CauseOver current detected in the LLC circuit.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: DC/DC hardware overflows.
CauseDC/DC converter hardware overflow.
Recommended fixRestart the unit, if the eror happens again, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: Overvoltage occurs in BUS.
CauseAC surge or PV surge or internal components failed.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: CAN data loss.
CauseCAN communication data loss between parallel inverters.
Recommended fix1. Check if communication cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: Host data loss.
CauseHost data loss in parallel communication.
Recommended fix1. Check if communication cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: Synchronization data loss.
CauseSynchronization data loss in parallel communication.
Recommended fix1. Check if communication cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.
Source:IVEM8K-12K-II_compressed.pdf· page 44
Fault: Current feedback into the inverter is detected.
CauseReverse current feedback detected at the inverter.
Recommended fix1. Restart the inverter. 2. Check if L/N cables are not connected reversely in all inverters. 3. For parallel system in single phase, make sure the sharing cables are connected in all inverters. For supporting three-phase system, make sure the sharing cables are connected in the inverters in the same phase, and disconnected in the inverters in different phases. 4. if the problem remains, please contact your installer.
Source:IVEM8K-12K-II_compressed.pdf· page 45
Fault: The firmware version of each inverter is not the same.
CauseFirmware versions on parallel inverters do not match.
Recommended fix1. Update all inverter firmware to the same version. 2. Check the version of each inverter via LCD setting and make sure the CPU versions are same. if not, please contact your installer to provide the firmware to update. 3. After updating, if the problem still remains, please contact your installer.
Source:IVEM8K-12K-II_compressed.pdf· page 45
Fault: The output current of each inverter is different.
CauseOutput current imbalance between parallel inverters.
Recommended fix1. Check if sharing cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.
Source:IVEM8K-12K-II_compressed.pdf· page 45
Fault: AC output mode setting is different.
CauseAC output mode setting (LCD program 28) does not match across parallel units.
Recommended fix1. Switch off the inverter and check LCD setting program 28. 2. For parallel system in single phase, make sure no 3P1, 3P2 or 3P3 is set on program 28. For supporting three-phase system, make sure no 'PAL' is set on program 28. 3. if the problem remains, please contact your installer.
Source:IVEM8K-12K-II_compressed.pdf· page 45
Fault: Generator current sensor failed.
CauseGenerator current sensor failure.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:IVEM8K-12K-II_compressed.pdf· page 45
Warning: Fan is locked. Beep three times every second.
CauseFan wiring not connected well or fan failure.
Recommended fixCheck if the Fans wiring connected well. Replace the fan.
Source:IVEM8K-12K-II_compressed.pdf· page 42
Warning: Overload. Beep twice every second.
CauseConnected load exceeds the inverter capacity.
Recommended fixPower down the inverter, wait 5 minutes for capacitors to discharge, then restart. If the fault recurs immediately or repeatedly, record the exact code and contact your installer or the manufacturer's service line.
Source:IVEM8K-12K-II_compressed.pdf· page 42
Warning: Low battery. Beep once every second.
CauseBattery voltage is too low.
Recommended fixThe battery voltage is too low, it should be charging.
Source:IVEM8K-12K-II_compressed.pdf· page 42
Warning: Grid anomaly. Grid icon blinking.
CauseGrid input is over voltage or over frequency.
Recommended fixCheck whether the input is overvoltage or overfrequency.
Source:IVEM8K-12K-II_compressed.pdf· page 42
Warning: Three-phase input missing phase. Fault LED flashing.
CauseThree-phase mains input is not normal (missing phase).
Recommended fixCheck whether the three-phase mains input is normal.
Source:IVEM8K-12K-II_compressed.pdf· page 42
Warning: The three-phase parallel is abnormal. Fault LED flashing.
CauseThree-phase parallel communication is abnormal.
Recommended fixVerify that the three-phase communication is normal.
Source:IVEM8K-12K-II_compressed.pdf· page 42
Warning: Generator anomaly. Generator icon blinking.
CauseGenerator input is over voltage or over frequency.
Recommended fixCheck whether the input is overvoltage or overfrequency.
Source:IVEM8K-12K-II_compressed.pdf· page 42
Warning: Three-phase parallel generator input phase deficiency. Fault LED flashing.
CauseThree-phase mains input is not normal (missing phase) on generator input.
Recommended fixCheck whether the three-phase mains input is normal.
Source:IVEM8K-12K-II_compressed.pdf· page 42
Warning: BMS firmware version is not matched.
CauseBMS firmware version mismatch.
Recommended fixUpgrade the firmware of BMS.
Source:IVEM8K-12K-II_compressed.pdf· page 42
Warning: BMS doesn't allow inverter to charge battery. Inverter will stop charging battery automatically.
CauseBMS has prohibited charging the battery.
Recommended fixInverter will stop charging battery automatically.
Source:IVEM8K-12K-II_compressed.pdf· page 42
Warning: BMS doesn't allow inverter to discharge battery. Inverter will stop discharging battery automatically.
CauseBMS has prohibited discharging the battery.
Recommended fixInverter will stop discharging battery automatically.
Source:IVEM8K-12K-II_compressed.pdf· page 42
Warning: BMS require inverter to charge battery. Inverter will charge battery automatically.
CauseBMS is requesting the inverter to charge the battery.
Recommended fixInverter will charge battery automatically.
Source:IVEM8K-12K-II_compressed.pdf· page 42
Warning: BMS detect something wrongs happened (range covers BMS internal alarm codes 54 through 65).
CauseBMS has detected an internal fault or abnormal condition.
Recommended fixIf the code is keeping for long time, please contact with your installer.
Source:IVEM8K-12K-II_compressed.pdf· page 42
Warning: The BMS communication is abnormal. Beep once every second.
CauseBMS communication cable is not properly connected or communication failure.
Recommended fixCheck whether the BMS communication cable is connected.
Source:IVEM8K-12K-II_compressed.pdf· page 42
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.