What is the difference between a fault and a warning on the FLB48314TG1?

A fault puts the unit into protection and stops normal operation — this page lists 20 of them for the FLB48314TG1. A warning leaves the unit running; there are 6 warning codes here. Resolve the cause of a fault before restarting; warnings can usually be cleared while the unit runs.

Does this page apply to other Felicity models?

No — this table was transcribed specifically from the FLB48314TG1 manual. Other Felicity devices have their own pages; start from the error-code hub to find the one matching the model number on your unit's label.

Where do these codes come from?

Every entry was transcribed from Felicity-FLB48314TG1-Manual.pdf — Felicity's official documentation. Each row cites its source manual (and page where printed), so you can verify the wording before acting on it.

Felicity FLB48314TG1 Error Codes: Causes & Fixes (26 codes)

This is the complete fault table for the Felicity FLB48314TG1 Battery — all 26 codes from the official manual on one page. On this Felicity device, a fault code means the unit has entered protection and stopped normal operation; a warning leaves it running. The exact indication (LED pattern or display code) is listed per code below.

Last checked against the official manuals on July 10, 2026.

Fault(20)— operation stops until cleared
Warning(6)— unit keeps running · needs attention

Fault codes (20)operation stops until cleared

C05

Charging Overcurrent Protection.

Fault

Charging current reached the trigger value and lasted for 15 seconds. Battery enters fault mode, disabling both charging input and discharging output.

CauseCharging current stayed above the BMS trigger value for 15 seconds — usually because the charge-current setting on the inverter is higher than the battery's recommended value.

Recommended fixPower down the inverter, wait 5 minutes for capacitors to discharge, then restart. If the fault recurs immediately or repeatedly, record the exact code and contact your installer or the manufacturer's service line.

Source:Felicity-FLB48314TG1-Manual.pdf

C06

Discharging Overcurrent Protection.

Fault

Discharging current reached the trigger value and lasted for 15 seconds. Battery enters fault mode, disabling both charging input and discharging output.

CauseDischarging current stayed above the BMS trigger value for 15 seconds — the connected load or the inverter's discharge-current setting exceeds what the pack is rated to deliver.

Source:Felicity-FLB48314TG1-Manual.pdf

COMM-FAULT

Unable to Communicate with Inverter.

Fault

Wrong communication cable used, or battery DIP switch settings are incorrect.

CauseCommunication has been lost between the inverter and a peripheral device — typically a battery BMS, smart meter, or external monitoring dongle.

Recommended fixBefore 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.pdf

FUSE-BLOWN

Fuse Blown (Overcurrent).

Fault

Battery experienced overcurrent causing the external fuse to blow.

CauseThe battery experienced an overcurrent severe enough to blow the external protection fuse — typically a short circuit or a hard current surge on the DC connection.

Recommended fixStep 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.pdf

LED1=OFF, LED2=OFF, LED3=OFF, LED4=ON

BMS Temperature Low.

Fault

Battery Management System (BMS) temperature fell below the lower protection threshold.

CauseThe BMS internal temperature has fallen below its lower protection threshold — the battery is installed or operating somewhere colder than its rated environment.

Source:Felicity-FLB48314TG1-Manual.pdf

LED1=OFF, LED2=OFF, LED3=ON, LED4=OFF

Cell Voltage Low.

Fault

Voltage of any battery cell fell below the rated protection value during discharging. Over-discharging protection activated.

CauseThe voltage of at least one cell fell below the rated protection value during discharging — deep discharge or a weak cell sagging under load — so over-discharging protection activated.

Source:Felicity-FLB48314TG1-Manual.pdf

LED1=OFF, LED2=ON, LED3=OFF, LED4=OFF

Battery Voltage Low.

Fault

Total battery pack voltage fell below the rated/protection value. Over-discharge protection activated; system stops supplying power externally.

CauseBattery voltage has fallen below the configured low-voltage cutoff. Causes: deep discharge during a long outage, undersized battery for the load, failing cells, or incorrect battery type setting.

Recommended fixAllow the battery to recharge from PV or grid. Check the battery bank voltage with a multimeter. If a single cell or block reads significantly lower than the others, that cell has failed. Verify the battery type and capacity settings in the inverter menu match the installed bank.

Source:Felicity-FLB48314TG1-Manual.pdf

LED1=OFF, LED2=ON, LED3=OFF, LED4=ON

Cell Temperature Low.

Fault

Battery cell temperature fell below lower protection threshold. Cell cannot be charged below 0 C.

CauseA cell temperature reading fell below the lower protection threshold. The cells cannot be charged below 0°C, so a pack sited in a cold location trips this protection.

Source:Felicity-FLB48314TG1-Manual.pdf

LED1=OFF, LED2=ON, LED3=ON, LED4=OFF

Discharging Current High.

Fault

Discharging current exceeded protection threshold. See also fault code C06 for discharging overcurrent (15-second trigger).

CauseThe load or inverter is drawing more than the pack's discharge protection limit — beyond the 160 A continuous rating for this model — or a short circuit is present on the output side.

Source:Felicity-FLB48314TG1-Manual.pdf

LED1=ON, LED2=OFF, LED3=OFF, LED4=OFF

Battery Voltage High.

Fault

Total battery pack voltage exceeded the rated/protection value. Indicated by red Power/Running Status LED with LED1 ON only.

CauseBattery voltage has exceeded the configured high-voltage cutoff. Usually a misconfigured charge profile, a runaway charger, or a fault in the battery management system.

Recommended fixDisconnect PV input and verify resting battery voltage. If above the manufacturer's float voltage, the BMS or charge controller has failed. Recheck the inverter's battery profile settings against the battery manufacturer's spec sheet. Stop the system and have a technician inspect before continuing.

Source:Felicity-FLB48314TG1-Manual.pdf

LED1=ON, LED2=OFF, LED3=OFF, LED4=ON

Cell Temperature High.

Fault

Battery cell temperature exceeded upper protection threshold (operating range Charge: 0 to +55 C; Discharge: -20 to +55 C).

CauseA cell temperature reading exceeded the upper protection threshold — ambient heat beyond the working range (0 to +55°C charging, −20 to +55°C discharging), poor ventilation, or sustained heavy current.

Source:Felicity-FLB48314TG1-Manual.pdf

LED1=ON, LED2=OFF, LED3=ON, LED4=OFF

Charging Current High.

Fault

Charging current exceeded protection threshold. See also fault code C05 for charging overcurrent (15-second trigger).

CauseCharge current exceeded the protection threshold — the inverter's charging-current setting is above the battery's recommended value (80 A recommended constant current, 160 A max continuous).

Source:Felicity-FLB48314TG1-Manual.pdf

LED1=ON, LED2=ON, LED3=OFF, LED4=OFF

Cell Voltage High.

Fault

Voltage of any single cell reached the over-voltage protection value during charging. Charging stopped until cells return to rated range.

CauseA single cell reached the over-voltage protection value during charging — the charge voltage is set too high or an imbalanced cell is rising ahead of the rest — so the BMS stopped charging.

Source:Felicity-FLB48314TG1-Manual.pdf

LED1=ON, LED2=ON, LED3=OFF, LED4=ON

Current Sensor Abnormal.

Fault

Internal current sensor reading abnormal/out of expected range. Indicates BMS sensor fault.

CauseThe BMS current sensor is returning an out-of-range reading — a fault in the current-sampling circuit inside the BMS rather than in the cells or wiring.

Source:Felicity-FLB48314TG1-Manual.pdf

LED1=ON, LED2=ON, LED3=ON, LED4=OFF

BMS Temperature High.

Fault

Battery Management System (BMS) temperature exceeded the upper protection threshold. May relate to MOSFET heat dissipation through the case.

CauseThe BMS board temperature exceeded its upper protection threshold. The MOSFETs shed heat through the case, so sustained heavy current, hot surroundings, or blocked ventilation can push it over the limit.

Source:Felicity-FLB48314TG1-Manual.pdf

OUTPUT-CUTOFF-CURRENT

High Current Charging/Discharging Causes Output Cutoff.

Fault

Charging and discharging current set on the inverter is too high.

CauseThe charging and discharging current set on the inverter is higher than the battery's recommended values, so the BMS cuts the output when the limit is exceeded.

Recommended fixSet 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.pdf

OUTPUT-INTERRUPT

Battery Output Interrupted Due to High Current.

Fault

Charging and discharging current settings on the inverter are too high during charging and discharging operations.

CauseThe inverter's charging and discharging current settings are too high for the pack, so current passes the protection limit during operation and the battery interrupts its output.

Recommended fixSet charging and discharging current on inverter according to recommendations in battery manual.

Source:Felicity-FLB48314TG1-Manual.pdf

OVP-CHG

Over Voltage Protection in Charging.

Faultprotection

During charging, total voltage of battery pack is higher than rated value or voltage of any single cell reaches protection value. System stops charging.

CauseDuring charging the total pack voltage rose above the rated value, or a single cell reached its protection value — a charge-voltage setting above the recommended 57.6 V, or cell imbalance.

Recommended fixProtection automatically clears when total voltage or all cells return to rated range.

Source:Felicity-FLB48314TG1-Manual.pdf

PARALLEL-DATA-MISSING

Parallel Battery Data Missing or Incorrect.

Fault

When multiple batteries are connected in parallel, parallel connection of the batteries is not set up correctly.

CauseThe parallel connection between batteries is not set up correctly — inter-battery communication cables are mis-connected or the DIP switches are not set in the correct sequence — so the inverter loses data for some packs.

Recommended fix1) Check the communication cables between the batteries. 2) Check whether the battery DIP switches are set in the correct sequence.

Source:Felicity-FLB48314TG1-Manual.pdf

UVP-DCHG

Low Voltage / Over-Discharge Protection in Discharging.

Faultprotection

Voltage of any battery cell or total voltage falls below rated protection value during discharging. Over-discharging protection activated; battery stops supplying power externally.

CauseThe voltage of a cell or of the whole pack fell below the rated protection value during discharging — the battery was run down too deeply — so it stopped supplying power externally.

Recommended fixProtection released once voltage of each cell returns to rated range. Recharge within 18 hours.

Source:Felicity-FLB48314TG1-Manual.pdf

Warning codes (6)unit keeps running · needs attention

CASE-OVERHEAT

Battery Pack Case Overheating (Abnormal).

Warning

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.

CauseThe BMS MOSFETs dissipate heat through the case, so some warmth is normal — but a rise beyond the usual heat range, especially with unusual noises or smells, points to an internal fault or to operating the pack in an enclosed, hot, or poorly ventilated spot.

Recommended fixStop 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.pdf

CHG-INCOMPLETE

Battery Does Not Fully Charge.

Warning

Charging voltage set on the inverter is too low.

CauseThe charging voltage set on the inverter is lower than the battery's recommended 57.6 V, so charging tapers off before the pack is actually full.

Recommended fixSet 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.pdf

CHG-NOT-PROGRESSING

Battery Indicates Charging But SOC Does Not Change.

Warning

Ambient temperature is too low, preventing the battery from charging.

CauseAmbient temperature is too low for charging — below the pack's 0°C minimum charge temperature the BMS blocks charge current, so the SOC does not rise even though the inverter reports charging.

Recommended fixCharge the battery within the temperature range specified in the manual (Charging temperature: 0 C to +55 C).

Source:Felicity-FLB48314TG1-Manual.pdf

Green LED Flash, Red LED OFF, all SOC LEDs OFF

Low Power.

Warning

Battery in low power state. Charge battery as soon as possible. Recharge within 18 hours after full discharge or over-discharge protection triggered.

CauseThe battery has discharged into its low-power state — remaining charge is nearly exhausted or over-discharge protection has tripped. A pack left in this state can fail to re-activate for charging, which is why recharge within 18 hours is required.

Source:Felicity-FLB48314TG1-Manual.pdf

LED1 Flash (Power/Running Green LED ON, Red LED OFF)

Low SOC Warning.

Warning

State of Charge below 10% (default threshold). LED1 flashes during Stand By, Normal, or Discharge modes.

CauseState of charge has fallen below the 10% default warning threshold; LED1 flashes as a recharge prompt while the pack keeps operating normally.

Source:Felicity-FLB48314TG1-Manual.pdf

SOC-INACCURATE

Inaccurate SOC Display.

Warning

Battery SOC has not been calibrated.

CauseThe battery's SOC has not been calibrated. The gauge needs one full discharge-charge cycle to calibrate, and the pack should be fully charged at least once a month to keep the reading accurate.

Recommended fixSOC 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.pdf

Still seeing a code on your FLB48314TG1?

Send us the code on your screen and a Felicity technician will reply with the exact steps for your unit. Support is free for life — a first diagnosis never needs a callout.

Message a technician on WhatsApp Call +971542899793 or use the contact form

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Related devices

Common questions about FLB48314TG1 error codes

What is the difference between a fault and a warning on the FLB48314TG1?: A fault puts the unit into protection and stops normal operation — this page lists 20 of them for the FLB48314TG1. A warning leaves the unit running; there are 6 warning codes here. Resolve the cause of a fault before restarting; warnings can usually be cleared while the unit runs.
Does this page apply to other Felicity models?: No — this table was transcribed specifically from the FLB48314TG1 manual. Other Felicity devices have their own pages; start from the error-code hub to find the one matching the model number on your unit's label.
Where do these codes come from?: Every entry was transcribed from Felicity-FLB48314TG1-Manual.pdf — Felicity's official documentation. Each row cites its source manual (and page where printed), so you can verify the wording before acting on it.

Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.

How to read the severity labels

Fault codes (20)operation stops until cleared

Charging Overcurrent Protection.

Discharging Overcurrent Protection.

Unable to Communicate with Inverter.

Fuse Blown (Overcurrent).

BMS Temperature Low.

Cell Voltage Low.

Battery Voltage Low.

Cell Temperature Low.

Discharging Current High.

Battery Voltage High.

Cell Temperature High.

Charging Current High.

Cell Voltage High.

Current Sensor Abnormal.

BMS Temperature High.

High Current Charging/Discharging Causes Output Cutoff.

Battery Output Interrupted Due to High Current.

Over Voltage Protection in Charging.

Parallel Battery Data Missing or Incorrect.

Low Voltage / Over-Discharge Protection in Discharging.

Warning codes (6)unit keeps running · needs attention

Battery Pack Case Overheating (Abnormal).

Battery Does Not Fully Charge.

Battery Indicates Charging But SOC Does Not Change.

Low Power.

Low SOC Warning.

Inaccurate SOC Display.

Still seeing a code on your FLB48314TG1?

Keep troubleshooting

Related devices

Common questions about FLB48314TG1 error codes