The Felicity IVGM5KL-P1G1 is a Inverter unit covered by a shared firmware family that includes 4 variants. The error codes listed below apply to every variant in this family — IVGM5KL-P1G1, IVGM6KL-P1G1, IVGM7K6L-P1G1, IVGM8KL-P1G1. If your unit's exact model number isn't shown in the title but is listed in the "also covers" tags, this is the correct reference page.
Each row below shows an error code, its severity, and a brief description. Click any row to expand the full cause and the recommended fix. The severity dot tells you whether the unit will keep operating (warning), derate (fault), or trip offline (critical). For codes that require an authorized service partner, the recommended-fix block says so explicitly.
PV input over current fault.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 53Battery voltage is too low, the battery should be charged.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 51Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 53Battery open, check battery wiring.
Check battery wiring.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 51Battery SOC is too low, battery should be recharged.
Recharge the battery.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 51Abnormal communication between battery and inverter in non-SOC mode, check battery and inverter wiring.
Check battery and inverter wiring.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 51Battery voltage is too low or Battery SOC is too low, the battery should be charged.
Charge the battery.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 51Battery voltage exceeds specification.
1. Check the Battery voltage is in the range of standard voltage in specification; 2. Check whether Battery cables are firmly and correctly connected; 3. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 53Battery over current fault.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 53Battery hardware over current detected.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 53LLC converter hardware over current fault.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 53BMS communication failure between battery and inverter.
1. Check whether BMS communication cable is firmly and correctly connected; 2. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 53Grid voltage is too high, check if the grid voltage is within the normal range.
Check if the grid voltage is within the normal range.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 51Grid voltage is too low, check if the grid voltage is within the normal range.
Check if the grid voltage is within the normal range.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 51Grid frequency is too high, check if the grid frequency is within the normal range.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 51Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 53Grid frequency is too low, check if the grid frequency is within the normal range.
Check if the grid frequency is within the normal range.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 51LLC converter soft start failure.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 53Grid phase sequence reversed, check grid phase sequence wiring.
Check grid phase sequence wiring.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 52Battery port short circuit detected.
1. Check whether the battery port is in short circuit; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 53DC bus over voltage fault.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 53When the power grid experiences an AC power outage, the device detects islanding proactively.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 52Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 54Entering LVRT at grid connection, the inverter absorbs reactive power from the grid.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 52Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 54The load is overloaded and should be reduced.
Reduce backup load.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 52Inverter software over current fault.
1. Please check whether the load power is within the range; 2. Restart and check whether it is in normal; 3. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 54Inverter hardware over current fault.
1. Please check whether the load power is within the range; 2. Restart and check whether it is in normal; 3. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 54Inverter soft start failure.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 54DC component detected in AC voltage output.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 54DC component detected in AC current output.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 54Inverter over voltage fault.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 54Inverter under voltage fault.
1. Please check whether the load power is within the range; 2. Restart and check whether it is in normal; 3. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 54Inverter output short circuit fault.
1. Please check the connection of buckup is firmly and correctly; 2. Restart and check whether it is in normal; 3. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 54Generator voltage is too high, check whether the generator voltage is within the normal range.
1. Please check whether the load power is within the range; 2. Restart and check whether it is in normal; 3. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 52Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 54Generator voltage is too low, check whether the generator voltage is within the normal range.
1. Please check whether the load power is within the range; 2. Restart and check whether it is in normal; 3. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 52Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 54Generator frequency is too high, check whether the generator frequency is within the normal range.
Check generator output frequency.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 52Generator frequency is too low, check whether the generator frequency is within the normal range.
Check generator output frequency.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 52Generator phase sequence reversed, check generator phase sequence wiring.
Check generator phase sequence wiring.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 52Heatsink over-temperature fault.
1. Check whether the work environment temperature is too high; 2. Turn off the inverter for 15mins and restart; 3. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 54Please check whether the load on backup port exceeds the generator specifications.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 52Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 55MCU communication fault.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 55EEPROM fault.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 55AC leakage current sensor fault.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 55AC leakage current detected.
1. Check PV side cable ground connection; 2. Restart the system 2~3 times; 3. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 55Grid relay open circuit detected during self-check.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 55Inverter relay self-check fault.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 55Generator relay self-check fault.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 55PV insulation impedance is too low.
1. Check the connection of PV panels and inverter is firmly and correctly; 2. Check whether the PE cable of inverter is connected to ground; 3. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 55Grid is incorrectly connected to backup port.
1. Check whether Backup cables are firmly and correctly connected; 2. Restart the system 2~3 times; 3. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 55Generator/Grid wrongly connected when smart load mode is set.
1. Check whether GEN cables are firmly and correctly connected; 2. Restart the system 2~3 times; 3. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 55NTC temperature sensor open circuit.
1. Restart the system 2~3 times; 2. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 55The inverter will reduce power if the heat sink temperature is too high.
Improve ventilation; reduce ambient temperature.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 52External CT (current transformer) sensor fault.
1. Check the connection of CT is firmly and correctly; 2. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 55Grid setting or Bat setting change, and the system will restart after 20ms.
Wait for system restart after parameter change.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 52Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 56Fan 2 malfunction, check fan for proper functioning.
1. Please check whether External RSD signal triggers shutdown; 2. if not, restart the inverter; 3. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 52Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 56Parallel system error.
1. Please check whether other inverter is in error state; 2. Restart the system; 3. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 56Parallel CAN communication failure.
1. Check whether Parallel cables are firmly and correctly connected; 2. Restart the system 2~3 times; 3. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 56Parallel host inverter lost.
1. Check whether Parallel cables are firmly and correctly connected; 2. Restart the system 2~3 times; 3. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 56Parallel synchronization signal lost.
1. Check whether Parallel cables are firmly and correctly connected; 2. Restart the system 2~3 times; 3. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 52Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 56Parallel inverters have inconsistent software versions.
1. Check whether the software version of the inverter is same; 2. Restart the system 2~3 times; 3. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 52Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 56Flash is not burned, contact the maintenance centre.
1. Check whether Parallel cables are firmly and correctly connected; 2. Check whether the software version of the inverter is same; 3. Restart the system 2~3 times; 4. Seek help from us, if can not go back to normal state.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 52Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 56CAN ID of different inverters is in conflict.
1. Please check whether CAN ID of different inverters is same; 2. Please check whether there are two masters in one phase.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 56Parallel PWM signal lost.
1. Please check whether the parallel cables are well-connected; 2. Restart the system; 3. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 56Grid phase sequence is abnormal.
1. Please check whether the grid wires are well-connected; 2. Please check whether the grid phase sequence is correct; 3. Restart the system; 4. if the fault still exists, please contact us for help.
Felicitysolar IVGM Series Hybrid inverter Instruction Manual.pdf · page 56Write down the exact code shown on the display, what the unit was doing when it appeared (charging, discharging, idle, grid-tied), and any LEDs or audible alarms. The same code can have different fixes depending on context.
Find the code in the list below and read the cause + recommended fix. Most warning-level codes can be cleared by following the listed action — usually reducing load, checking wiring, or restarting the unit.
Each code shows the source manual filename and page number. Open that exact page in the official manual to verify model-specific notes (firmware version, parallel-config notes, regional variants) before acting.
If a fix requires opening the enclosure or accessing terminals, disconnect AC input, DC PV, and battery in that order. Wait at least 60 seconds for capacitors to discharge before touching any conductors.
Critical codes (short-circuit, IGBT failure, BMS hardware error) should not be cleared by end users. Note the code, model number, and source manual page, then contact an authorized service partner.
Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.