Fault: Bus voltage is too high.
CauseAC Surge or internal components failed.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 36
Felicity IVEM 6048 Error Codes: Causes & Fixes (49 codes)
This is the complete fault table for the Felicity IVEM 6048 Inverter family — 49 codes shared by 2 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.
Also coversIVEM6048
Last checked against the official manuals on July 10, 2026.
How to read the severity labels
- Fault(40)— output stops · red LED solid
- Warning(9)— unit keeps running · red LED flashing
Fault codes (40)output stops · red LED solid
Fault: Bus voltage is too low.
CauseInternal components failed (inferred from similar fault classes).
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 36
Fault: Bus soft start fail.
CauseInternal components failed.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 36
Fault: Inverter soft start fail.
CauseInternal components failed.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 36
Fault: Over current or surge detected by Software.
CauseSoftware-detected overcurrent or surge condition.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 36
Fault: Over current or surge detected by hardware.
CauseHardware-detected overcurrent or surge condition.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 36
Fault: Output voltage is too low.
CauseConnected load is too high or internal failure.
Recommended fixReduce the connected load. Restart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: Output voltage is too high.
CauseInternal failure causing high output voltage.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: Output short circuited.
CauseWiring issue or abnormal load causing a short circuit.
Recommended fixCheck if wiring is connected well and remove abnormal load.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: Overload time out.
CauseSustained overload condition.
Recommended fixReduce the connected load by switching off some equipment.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: Battery voltage is too high.
CauseBattery spec/quantity does not meet inverter requirements.
Recommended fixCheck if spec and quantity of batteries are meet requirements.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: Over current happen at DCDC circuit.
CauseOvercurrent in the DC/DC stage.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: PV voltage is too high.
CauseToo many PV modules connected in series.
Recommended fixReduce the number of PV modules in series.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: Short circuited happen at PV port.
CauseWiring issue causing short at PV port.
Recommended fixCheck if wiring is connected well.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: PV power is abnormal.
CausePV power exceeds normal limits (too many PV modules).
Recommended fixReduce the number of PV modules.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: Over current happen at PV port.
CauseOvercurrent at the PV input.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: Fan is locked.
CauseFan wiring not connected well or fan failed.
Recommended fixCheck if wiring is connected well. Replace the fan.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: Over temperature happen at PV circuit.
CauseThe temperature of internal PV 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:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: Over temperature happen at battery circuit.
CauseThe temperature of internal 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:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: Over temperature happen at inverter circuit.
CauseThe temperature of internal inverter 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:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
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:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: DCDC current sensor failed.
CauseDC/DC current sensor hardware failure.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: No.2 DCDC current sensor failed.
CauseSecond DC/DC current sensor hardware failure.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: Inverter current sensor failed.
CauseInverter current sensor hardware failure.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: OP current sensor failed.
CauseOutput current sensor hardware failure.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: Sharing current sensor failed.
CauseSharing current sensor hardware failure (parallel operation).
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 37
Fault: The AC input and output wires are inversely connected.
CauseAC input and output wires are reversed.
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:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 38
Fault: Single unit is installed to parallel system.
CauseA single unit configuration was installed where parallel was expected.
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:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 38
Fault: DC/DC soft start fail.
CauseInternal failure during DC/DC soft start.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 38
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:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 38
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:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 38
Fault: Over current happen at LLC circuit.
CauseOvercurrent in LLC resonant circuit.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 38
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:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 38
Fault: CAN data loss.
CauseCommunication cable connection issue between paralleled inverters.
Recommended fix1. Check if communication cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 38
Fault: Host data loss.
CauseCommunication cable connection issue between paralleled inverters.
Recommended fix1. Check if communication cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 38
Fault: Synchronization data loss.
CauseCommunication cable connection issue between paralleled inverters.
Recommended fix1. Check if communication cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 38
Fault: Current feedback into the inverter is detected.
CauseReverse-connected L/N cables or improper sharing-cable wiring in parallel/three-phase systems.
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:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 38
Fault: The firmware version of each inverter is not the same.
CauseCPU/firmware versions differ between paralleled inverters.
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:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 38
Fault: The output current of each inverter is different.
CauseSharing cables not connected well between paralleled inverters.
Recommended fix1. Check if sharing cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 39
Fault: AC output mode setting is different.
CauseInconsistent AC output mode (program 28) settings across paralleled inverters.
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:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 39
Warning codes (9)unit keeps running · red LED flashing
Warning: Fan is locked. Beep three times every second.
CauseFan wiring not connected well or fan failure.
Recommended fixCheck if the Fan's wiring connected well. Replace the fan.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 36
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:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 36
Warning: Low battery. Beep once every second.
CauseThe battery voltage is too low.
Recommended fixThe battery voltage is too low, it should be charging.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 36
Warning: BMS firmware version is not matched.
CauseBMS firmware version mismatch.
Recommended fixUpgrade the firmware of BMS.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 36
Warning: BMS doesn't allow inverter to charge battery.
CauseBMS has prohibited charging.
Recommended fixInverter will stop charging battery automatically.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 36
Warning: BMS doesn't allow inverter to discharge battery.
CauseBMS has prohibited discharging.
Recommended fixInverter will stop discharging battery automatically.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 36
Warning: BMS require inverter to charge battery.
CauseBMS has requested charging.
Recommended fixInverter will charge battery automatically.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 36
Warning: BMS detect something wrongs happened (range covering codes 54 through 65).
CauseBMS has detected an internal abnormality.
Recommended fixIf the code is keeping for long time, please contact with your installer.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 36
Warning: BMS communication fault.
CauseCommunication line between BMS and inverter is not connected well.
Recommended fixCheck if the communication line is connected well.
Source:felicitysolar IVEM 6048 Solar Inverter User Guide.pdf· page 36
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- All Felicity error codesSearch every device and code in the database
- Felicity Inverter Error Codes: Complete Guide for All ModelsThe step-by-step troubleshooting guide
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Common questions about IVEM 6048 error codes
- What is the difference between a fault and a warning on the IVEM 6048?
- A fault cuts the unit's output and the red LED stays solid — this page lists 40 of them for the IVEM 6048. A warning only flashes the red LED and the unit keeps running; there are 9 warning codes here. Resolve the cause of a fault before restarting; warnings can usually be cleared while the unit runs.
- Which model numbers does this page cover?
- The IVEM 6048 shares its firmware and fault table with 1 other model number: IVEM6048. If your unit is any of these, every code on this page applies to it.
- Where do these codes come from?
- Every entry was transcribed from felicitysolar IVEM 6048 Solar Inverter User Guide.pdf — Felicity's official documentation. Each row cites its source manual (and page where printed), so you can verify the wording before acting on it.
Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.