FLA48500
Battery14 codesC01Battery overvoltage.Fault
Battery overvoltage protection triggered (pack-level voltage exceeded threshold).
Battery pack voltage above operating limit (operating range 44.8-57.6V; max charging voltage 57.6V).
Restart the unit. if the error persists, contact the repair center.
felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdfC02Battery undervoltage.Fault
Battery undervoltage protection triggered (pack-level voltage below threshold).
Battery pack voltage below cut-off (cut-off voltage 48V); over-discharge condition.
Restart the unit. if the error persists, contact the repair center.
felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdfC03Cell overvoltage.Fault
Individual cell overvoltage protection triggered.
One or more cells exceeded the per-cell upper voltage limit.
Restart the unit. if the error persists, contact the repair center.
felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdfC04Cell undervoltage.Fault
Individual cell undervoltage protection triggered.
One or more cells dropped below the per-cell lower voltage limit.
Restart the unit. if the error persists, contact the repair center.
felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdfC05Charge overcurrent.Fault
Charging current exceeded the allowable limit.
Charge current above recommended (≤200A continuous, 300A 15s peak).
Restart the unit. if the error persists, contact the repair center.
felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdfC06Discharge overcurrent.Fault
Discharging current exceeded the allowable limit.
Discharge current above recommended (≤200A continuous, 300A 15s peak).
Restart the unit. if the error persists, contact the repair center.
felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdfC07MOS overtemperature.Fault
MOSFET (BMS power switch) over-temperature protection.
1. The inner temperature is over the limitation. 2. Check whether the ambient temperature is too high.
Reduce ambient temperature / improve ventilation; restart the unit. if the error persists, return to repair center.
felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdfC08MOS undertemperature.Fault
MOSFET (BMS power switch) under-temperature protection.
1. The internal temperature is lower than the limit range. 2. Check whether the ambient temperature is too low.
Raise ambient temperature into operating range (charging 0-55°C; discharging -20-55°C); restart the unit. if the error persists, return to repair center.
felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdfC09Cell overtemperature.Fault
Battery cell over-temperature protection triggered.
Cell temperature exceeded upper limit (charging temperature range 0-55°C, discharging -20-55°C).
Restart the unit. if the error persists, contact the repair center.
felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdfC10Cell undertemperature.Fault
Battery cell under-temperature protection triggered.
Cell temperature below lower limit.
Restart the unit. if the error persists, contact the repair center.
felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdfC11Abnormal current sampling.Fault
Internal current measurement / sampling circuit abnormal.
Hardware/sensor abnormality in current sampling path.
Restart the unit. if the error persists, contact the repair center.
felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdfC12Abnormal output impedance.Fault
Output impedance abnormal.
Abnormal impedance detected on output (possible bad connection, contactor or wiring issue).
Restart the unit. if the error persists, contact the repair center.
felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdfC13Parallel failed.Fault
Parallel connection / parallel-mode start-up failed.
Parallel condition not satisfied (e.g. pack-to-pack voltage difference ≥3V, or wiring issue between paralleled units).
1. Please check if single unit is installed in parallel system. 2. if this error happens during parallel installation, please check wires connection. if they are connected correctly, please finish parallel installation first, and then Restart the unit. 3. if the problem remains, please contact your installer.
felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdfC14Output loss.Fault
Output loss / no output detected.
Breaker open, blown fuse, or output path interrupted.
1. Please check whether the circuit breaker is closed; 2. Please check whether the fuse is normal; 3. Restart the unit. if the error persists, contact the repair center.
felicitysolar FLA48500 LiFePO4 Battery System for Households User Guide.pdfCompiled from official FelicityESS user manuals. Always consult your device manual and a qualified technician before performing repairs.