FLA48200/FLA48300/FLA48500 and LUX-Y low-voltage LiFePO4 batteries (BMS fault code list)
Felicity C14 error code
Output loss: the battery is not delivering power to the load.
Likely causes
- Battery circuit breaker open
- Blown fuse
- Output cable disconnected
- BMS output protection active
Checks to run, in order
- 1Check whether the circuit breaker is closed
- 2Check whether the fuse is intact
- 3Measure voltage at the battery output terminals
- 4Check the output cable connection
Fixes
- Close the breaker
- Replace the blown fuse with the correct rating
- Reconnect the output cable and restart
- If the error persists, contact the repair centre
When to escalate
If the breaker and fuse are good but there is no output, escalate for BMS or pack service.
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 C14 mean?
Output loss: the battery is not delivering power to the load.
How do I fix Felicity C14?
Close the breaker Replace the blown fuse with the correct rating Reconnect the output cable and restart If the error persists, contact the repair centre
When should I escalate Felicity C14?
If the breaker and fuse are good but there is no output, escalate for BMS or pack service.
Can I reset Felicity C14 myself?
Only after isolating the AC and DC sides and running the checks above. If Felicity C14 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Felicity C14?
Felicity C14 is documented for FLA48200/FLA48300/FLA48500 and LUX-Y low-voltage LiFePO4 batteries (BMS fault code list). 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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