About the Felicity FLB48314TG1
The Felicity FLB48314TG1 is a Battery unit. The 26 error codes listed below are the complete fault catalog for this device, compiled from the official Felicity user manual.
FLB48314TG1
Battery26 codes 20 Fault 6 Warning
How to use this 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.
C05Charging Overcurrent Protection.Fault
Description
Charging current reached the trigger value and lasted for 15 seconds. Battery enters fault mode, disabling both charging input and discharging output.
Source:
Felicity-FLB48314TG1-Manual.pdfC06Discharging Overcurrent Protection.Fault
Description
Discharging current reached the trigger value and lasted for 15 seconds. Battery enters fault mode, disabling both charging input and discharging output.
Source:
Felicity-FLB48314TG1-Manual.pdfCASE-OVERHEATBattery Pack Case Overheating (Abnormal).Warning
Description
Surface temperature of case rises abnormally (exceeding normal heat range), accompanied by unusual noises or smells. Note: Some case warmth during normal operation is expected due to MOSFET heat dissipation through the case.
Recommended fix
Stop using the battery pack immediately and contact professional technicians for inspection and maintenance. Do not attempt to disassemble or handle yourself. Ensure proper ventilation around the case during use.
Source:
Felicity-FLB48314TG1-Manual.pdfCHG-INCOMPLETEBattery Does Not Fully Charge.Warning
Description
Charging voltage set on the inverter is too low.
Recommended fix
Set charging voltage on inverter according to recommended value in battery manual (Max. Charging Voltage: 57.6V; Floating Charging Voltage: 57.6V).
Source:
Felicity-FLB48314TG1-Manual.pdfCHG-NOT-PROGRESSINGBattery Indicates Charging But SOC Does Not Change.Warning
Description
Ambient temperature is too low, preventing the battery from charging.
Recommended fix
Charge the battery within the temperature range specified in the manual (Charging temperature: 0 C to +55 C).
Source:
Felicity-FLB48314TG1-Manual.pdfCOMM-FAULTUnable to Communicate with Inverter.Fault
Description
Wrong communication cable used, or battery DIP switch settings are incorrect.
Recommended fix
Before connecting battery to inverter, set battery DIP switches correctly per the DIP switch table. After setting DIP switches, restart the battery to activate the DIP, then use correct communication cable.
Source:
Felicity-FLB48314TG1-Manual.pdfFUSE-BLOWNFuse Blown (Overcurrent).Fault
Description
Battery experienced overcurrent causing the external fuse to blow.
Recommended fix
Step 1: Use Phillips-head screwdriver to remove screws from fuse cover. Step 2: Open fuse cover, remove old fuse, replace with the new one (spare fuse provided). Step 3: Reattach fuse cover and secure. Non-professionals are not allowed to open this cover.
Source:
Felicity-FLB48314TG1-Manual.pdfGreen LED Flash, Red LED OFF, all SOC LEDs OFFLow Power.Warning
Description
Battery in low power state. Charge battery as soon as possible. Recharge within 18 hours after full discharge or over-discharge protection triggered.
Source:
Felicity-FLB48314TG1-Manual.pdfLED1 Flash (Power/Running Green LED ON, Red LED OFF)Low SOC Warning.Warning
Description
State of Charge below 10% (default threshold). LED1 flashes during Stand By, Normal, or Discharge modes.
Source:
Felicity-FLB48314TG1-Manual.pdfLED1=OFF, LED2=OFF, LED3=OFF, LED4=ONBMS Temperature Low.Fault
Description
Battery Management System (BMS) temperature fell below the lower protection threshold.
Source:
Felicity-FLB48314TG1-Manual.pdfLED1=OFF, LED2=OFF, LED3=ON, LED4=OFFCell Voltage Low.Fault
Description
Voltage of any battery cell fell below the rated protection value during discharging. Over-discharging protection activated.
Source:
Felicity-FLB48314TG1-Manual.pdfLED1=OFF, LED2=ON, LED3=OFF, LED4=OFFBattery Voltage Low.Fault
Description
Total battery pack voltage fell below the rated/protection value. Over-discharge protection activated; system stops supplying power externally.
Source:
Felicity-FLB48314TG1-Manual.pdfLED1=OFF, LED2=ON, LED3=OFF, LED4=ONCell Temperature Low.Fault
Description
Battery cell temperature fell below lower protection threshold. Cell cannot be charged below 0 C.
Source:
Felicity-FLB48314TG1-Manual.pdfLED1=OFF, LED2=ON, LED3=ON, LED4=OFFDischarging Current High.Fault
Description
Discharging current exceeded protection threshold. See also fault code C06 for discharging overcurrent (15-second trigger).
Source:
Felicity-FLB48314TG1-Manual.pdfLED1=ON, LED2=OFF, LED3=OFF, LED4=OFFBattery Voltage High.Fault
Description
Total battery pack voltage exceeded the rated/protection value. Indicated by red Power/Running Status LED with LED1 ON only.
Source:
Felicity-FLB48314TG1-Manual.pdfLED1=ON, LED2=OFF, LED3=OFF, LED4=ONCell Temperature High.Fault
Description
Battery cell temperature exceeded upper protection threshold (operating range Charge: 0 to +55 C; Discharge: -20 to +55 C).
Source:
Felicity-FLB48314TG1-Manual.pdfLED1=ON, LED2=OFF, LED3=ON, LED4=OFFCharging Current High.Fault
Description
Charging current exceeded protection threshold. See also fault code C05 for charging overcurrent (15-second trigger).
Source:
Felicity-FLB48314TG1-Manual.pdfLED1=ON, LED2=ON, LED3=OFF, LED4=OFFCell Voltage High.Fault
Description
Voltage of any single cell reached the over-voltage protection value during charging. Charging stopped until cells return to rated range.
Source:
Felicity-FLB48314TG1-Manual.pdfLED1=ON, LED2=ON, LED3=OFF, LED4=ONCurrent Sensor Abnormal.Fault
Description
Internal current sensor reading abnormal/out of expected range. Indicates BMS sensor fault.
Source:
Felicity-FLB48314TG1-Manual.pdfLED1=ON, LED2=ON, LED3=ON, LED4=OFFBMS Temperature High.Fault
Description
Battery Management System (BMS) temperature exceeded the upper protection threshold. May relate to MOSFET heat dissipation through the case.
Source:
Felicity-FLB48314TG1-Manual.pdfOUTPUT-CUTOFF-CURRENTHigh Current Charging/Discharging Causes Output Cutoff.Fault
Description
Charging and discharging current set on the inverter is too high.
Recommended fix
Set charging and discharging current on inverter according to recommended values in battery manual (Recommend Charge/Discharge Current: 80A; Max continuous: 160A).
Source:
Felicity-FLB48314TG1-Manual.pdfOUTPUT-INTERRUPTBattery Output Interrupted Due to High Current.Fault
Description
Charging and discharging current settings on the inverter are too high during charging and discharging operations.
Recommended fix
Set charging and discharging current on inverter according to recommendations in battery manual.
Source:
Felicity-FLB48314TG1-Manual.pdfOVP-CHGOver Voltage Protection in Charging.Fault— protection
Description
During charging, total voltage of battery pack is higher than rated value or voltage of any single cell reaches protection value. System stops charging.
Recommended fix
Protection automatically clears when total voltage or all cells return to rated range.
Source:
Felicity-FLB48314TG1-Manual.pdfPARALLEL-DATA-MISSINGParallel Battery Data Missing or Incorrect.Fault
Description
When multiple batteries are connected in parallel, parallel connection of the batteries is not set up correctly.
Recommended fix
1) Check the communication cables between the batteries. 2) Check whether the battery DIP switches are set in the correct sequence.
Source:
Felicity-FLB48314TG1-Manual.pdfSOC-INACCURATEInaccurate SOC Display.Warning
Description
Battery SOC has not been calibrated.
Recommended fix
SOC will automatically calibrate after one full charge cycle. Discharge battery to 0%, then charge to 100%. Battery should be fully charged at least once a month.
Source:
Felicity-FLB48314TG1-Manual.pdfUVP-DCHGLow Voltage / Over-Discharge Protection in Discharging.Fault— protection
Description
Voltage of any battery cell or total voltage falls below rated protection value during discharging. Over-discharging protection activated; battery stops supplying power externally.
Recommended fix
Protection released once voltage of each cell returns to rated range. Recharge within 18 hours.
Source:
Felicity-FLB48314TG1-Manual.pdfStep-by-step troubleshooting checklist
- 1.Note the exact code and timing
Write 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.
- 2.Check the recommended fix on this page
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.
- 3.Verify the source manual page
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.
- 4.Disconnect AC, DC, and battery before opening
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.
- 5.Escalate critical codes to authorized service
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.
Common questions about FLB48314TG1 error codes
- Where can I find the official Felicity FLB48314TG1 error code manual?
- Each code on this page lists the official source manual filename and page number at the bottom. The manuals are published by Felicity on their website; we compile the codes here so you can search across all of them at once instead of opening each PDF.
- Is the FLB48314TG1 the same as other Felicity models?
- Some Felicity units share firmware across a family of variants — the same fault codes apply to multiple model numbers. Look at the "also covers" chips below the title to see which other model numbers this page applies to.
- What's the most critical code on a Felicity FLB48314TG1?
- Critical-severity codes (red dot) are the ones that trip the unit offline immediately — typically short-circuit, IGBT, or BMS hardware failures. These are listed first when you filter by severity. Do not bypass them; they indicate a hardware or safety condition that requires service.
Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.