The Felicity HE-GF-FLA-48500 is a Battery unit covered by a shared firmware family that includes 2 variants. The error codes listed below apply to every variant in this family — HE-GF-FLA-48500, FLA48500. If your unit's exact model number isn't shown in the title but is listed in the "also covers" tags, this is the correct reference page.
Each row below shows an error code, its severity, and a brief description. Click any row to expand the full cause and the recommended fix. The severity dot tells you whether the unit will keep operating (warning), derate (fault), or trip offline (critical). For codes that require an authorized service partner, the recommended-fix block says so explicitly.
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.
HE-GF-FLA-48500 Manual_20250327_EN.pdfBattery 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.
HE-GF-FLA-48500 Manual_20250327_EN.pdfIndividual 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.
HE-GF-FLA-48500 Manual_20250327_EN.pdfIndividual 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.
HE-GF-FLA-48500 Manual_20250327_EN.pdfCharging 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.
HE-GF-FLA-48500 Manual_20250327_EN.pdfDischarging 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.
HE-GF-FLA-48500 Manual_20250327_EN.pdfMOSFET (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.
HE-GF-FLA-48500 Manual_20250327_EN.pdfMOSFET (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.
HE-GF-FLA-48500 Manual_20250327_EN.pdfBattery 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.
HE-GF-FLA-48500 Manual_20250327_EN.pdfBattery cell under-temperature protection triggered.
Cell temperature below lower limit.
Restart the unit. if the error persists, contact the repair center.
HE-GF-FLA-48500 Manual_20250327_EN.pdfInternal current measurement / sampling circuit abnormal.
Hardware/sensor abnormality in current sampling path.
Restart the unit. if the error persists, contact the repair center.
HE-GF-FLA-48500 Manual_20250327_EN.pdfOutput 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.
HE-GF-FLA-48500 Manual_20250327_EN.pdfParallel 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.
HE-GF-FLA-48500 Manual_20250327_EN.pdfOutput 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.
HE-GF-FLA-48500 Manual_20250327_EN.pdfWrite down the exact code shown on the display, what the unit was doing when it appeared (charging, discharging, idle, grid-tied), and any LEDs or audible alarms. The same code can have different fixes depending on context.
Find the code in the list below and read the cause + recommended fix. Most warning-level codes can be cleared by following the listed action — usually reducing load, checking wiring, or restarting the unit.
Each code shows the source manual filename and page number. Open that exact page in the official manual to verify model-specific notes (firmware version, parallel-config notes, regional variants) before acting.
If a fix requires opening the enclosure or accessing terminals, disconnect AC input, DC PV, and battery in that order. Wait at least 60 seconds for capacitors to discharge before touching any conductors.
Critical codes (short-circuit, IGBT failure, BMS hardware error) should not be cleared by end users. Note the code, model number, and source manual page, then contact an authorized service partner.
Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.