IVGM5-8K LP2G1 hybrid inverters (fault code list, solid fault LED); warning list uses 87 for fan 2 failed alarm
Felicity 87 error code
RSD fault (solid LED): the rapid-shutdown signal triggered or the RSD circuit failed; in the warning list the same number is fan 2 failure (flashing LED).
Likely causes
- External RSD switch or signal activated
- RSD wiring open or shorted
- RSD transmitter or receiver fault
- Fan 2 obstructed, disconnected or failed (warning variant)
Checks to run, in order
- 1Note whether the fault LED is solid (fault) or flashing (warning)
- 2If solid, check whether the external RSD signal is triggering shutdown
- 3Check the RSD wiring and switch
- 4If flashing, check that fan 2 runs and is free of obstruction
Fixes
- Reset the RSD switch if it was activated
- Repair the RSD wiring, or restart if the signal is not active
- For the warning, clean or replace fan 2
When to escalate
If code 87 remains after the RSD circuit is checked, or fan 2 does not run, 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 87 mean?
RSD fault (solid LED): the rapid-shutdown signal triggered or the RSD circuit failed; in the warning list the same number is fan 2 failure (flashing LED).
How do I fix Felicity 87?
Reset the RSD switch if it was activated Repair the RSD wiring, or restart if the signal is not active For the warning, clean or replace fan 2
When should I escalate Felicity 87?
If code 87 remains after the RSD circuit is checked, or fan 2 does not run, escalate to the distributor.
Can I reset Felicity 87 myself?
Only after isolating the AC and DC sides and running the checks above. If Felicity 87 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Felicity 87?
Felicity 87 is documented for IVGM5-8K LP2G1 hybrid inverters (fault code list, solid fault LED); warning list uses 87 for fan 2 failed 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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