IVGM5-8K LP2G1 hybrid inverters (fault code list, solid fault LED)
Felicity 56 error code
INV short-circuit fault on the inverter AC output.
Likely causes
- Short circuit in the backup output wiring
- Shorted appliance or socket on the backup circuit
- Damaged cable insulation
- Water in an outdoor socket or junction box
Checks to run, in order
- 1Switch off the backup output breaker and disconnect all backup loads
- 2Check the backup wiring for a short with an insulation tester
- 3Check each appliance and socket on the backup circuit
- 4Inspect outdoor joints for water ingress
Fixes
- Clear the short and repair or replace the damaged cable
- Reconnect loads one at a time and restart
- If the fault clears with no load, the wiring was the cause; if not, book service
When to escalate
If code 56 persists with all backup loads disconnected, the inverter output stage has failed - escalate to the distributor.
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 56 mean?
INV short-circuit fault on the inverter AC output.
How do I fix Felicity 56?
Clear the short and repair or replace the damaged cable Reconnect loads one at a time and restart If the fault clears with no load, the wiring was the cause; if not, book service
When should I escalate Felicity 56?
If code 56 persists with all backup loads disconnected, the inverter output stage has failed - escalate to the distributor.
Can I reset Felicity 56 myself?
Only after isolating the AC and DC sides and running the checks above. If Felicity 56 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Felicity 56?
Felicity 56 is documented for IVGM5-8K LP2G1 hybrid inverters (fault code list, solid fault LED). 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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