IVGM5-8K LP2G1 hybrid inverters (fault code list, solid fault LED); warning list uses 35 for grid over-frequency alarm
Felicity 35 error code
BUCK-BOOST current sensor fault; in the warning list the same number means grid over-frequency alarm.
Likely causes
- Failed current sensor in the buck-boost stage
- Damaged sensor harness or control-board connection
- Control-board fault
- For a flashing warning, grid frequency above the inverter's window
Checks to run, in order
- 1Note whether the fault LED is solid (fault) or flashing (warning)
- 2If flashing, measure grid frequency at the AC input and compare with the configured window
- 3If solid, restart 2-3 times and see whether the code returns immediately
- 4Inspect the inverter for signs of overheating or a loose internal harness (installer only)
Fixes
- For the warning, wait for grid frequency to recover and check the generator governor if one is used
- For the fault, restart 2-3 times as the manual directs
- If the fault returns, remove the unit from service and book repair
When to escalate
A solid code 35 that returns after restarts is an internal sensor or board fault - escalate to the distributor rather than reopening the unit.
Fix it with the right tools
Check the system around the fault before replacing parts: load, battery bank, PV string and commissioning settings. If you need a second opinion, send the code and your inverter model to our team.
Before you open the inverter
- Isolate both the AC and DC sides, then confirm the display is dead before touching terminals.
- Use insulated tools and one hand where possible. DC arcs do not self-extinguish like AC.
- If you see burnt terminals, swollen cells, leaking electrolyte or a burning smell, stop and escalate instead of resetting the fault.
Questions installers ask
What does Felicity 35 mean?
BUCK-BOOST current sensor fault; in the warning list the same number means grid over-frequency alarm.
How do I fix Felicity 35?
For the warning, wait for grid frequency to recover and check the generator governor if one is used For the fault, restart 2-3 times as the manual directs If the fault returns, remove the unit from service and book repair
When should I escalate Felicity 35?
A solid code 35 that returns after restarts is an internal sensor or board fault - escalate to the distributor rather than reopening the unit.
Can I reset Felicity 35 myself?
Only after isolating the AC and DC sides and running the checks above. If Felicity 35 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Felicity 35?
Felicity 35 is documented for IVGM5-8K LP2G1 hybrid inverters (fault code list, solid fault LED); warning list uses 35 for grid over-frequency alarm. Confirm the code on your own unit's display or manual before ordering parts.
More Felicity error codes
- Felicity 04Low cell voltage / over-discharge protection.
- Felicity 05PV over-current fault: the PV input current exceeded the inverter's PV input limit.
- Felicity 18PV short-circuit fault on the PV input; in the warning list the same number means battery under-voltage alarm.
- Felicity 19Battery open-circuit alarm: the inverter no longer detects a battery on its terminals.
- Felicity 20Battery SOC low alarm: the battery's state of charge has fallen to the low-SOC warning threshold.
- Felicity 21BMS communication alarm: abnormal communication between battery and inverter in non-SOC mode.
Guidance reviewed 17 October 2026 by the Mishka Energy installer team. Error codes vary by brand, model family and firmware; confirm against the manufacturer manual.
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