This is the complete fault table for the Felicity FLA48200 Battery — all 14 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.
Total battery pack voltage exceeded the upper limit.
CauseThe total battery pack voltage rose above its rated protection value during charging, so the BMS stopped charging. The protection releases once the pack voltage returns to the rated range.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf· page 12
Total battery pack voltage dropped below the lower limit.
CauseThe total pack voltage fell below its rated protection value during discharging (over-discharge), so the BMS stopped supplying power. The protection releases once the voltage returns to the rated range.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf· page 12
Individual cell voltage exceeded the upper limit.
CauseAn individual cell reached its over-voltage protection value during charging, typically from cell imbalance letting one cell run ahead of the pack, so the BMS stopped charging.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf· page 12
Individual cell voltage dropped below the lower limit.
CauseAn individual cell fell below its under-voltage protection value during discharging, usually deep discharge or a weak, imbalanced cell, so the BMS stopped supplying power.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf· page 12
Charging current exceeded safe limits.
CauseThe charging current reached the BMS trigger value and stayed there for 15 seconds, activating charge overcurrent protection: the charger or inverter is pushing more current than the pack accepts. The battery disables both charging input and discharging output while in fault mode.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf· page 12
Discharging current exceeded safe limits.
CauseThe discharging current reached the BMS trigger value and stayed there for 15 seconds, activating discharge overcurrent protection: the load or inverter is drawing more current than the pack's discharge limit. The battery disables both charging input and discharging output while in fault mode.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf· page 12
MOSFET temperature is too high.
Cause1. The inner temperature is over the limitation. 2. Ambient temperature is too high.
Recommended fixCheck whether the ambient temperature is too high.
Source:Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf· page 12
MOSFET temperature is too low.
Cause1. The internal temperature is lower than the limit range. 2. Ambient temperature is too low.
Recommended fixCheck whether the ambient temperature is too low.
Source:Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf· page 12
Cell temperature exceeded the upper limit.
CauseInverter internal temperature has exceeded the safe operating threshold. Causes include high ambient temperature, blocked cooling vents, failed cooling fan, or installation in direct sunlight.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf· page 13
Cell temperature dropped below the lower limit.
CauseInverter ambient temperature is below the minimum operating range. Most common in unheated outdoor installs in winter.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf· page 13
Parallel installation failed; battery cannot establish parallel communication or balance with other packs.
CauseImproper parallel installation or incorrect wire connections between the battery packs in parallel.
Recommended fix1. Please check if single unit is installed to 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.
Source:Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf· page 13
Battery output is lost - no power being delivered to the load.
CauseCircuit breaker open or fuse blown.
Recommended fix1. 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.
Source:Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf· page 13
Current sampling/measurement circuit reported an abnormal reading.
CauseThe BMS current sensor or its sampling circuit returned an abnormal reading. This is an internal hardware fault in the current-measurement path, not an installation issue.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf· page 13
Battery output impedance is abnormal.
CauseThe BMS measured abnormal impedance on the battery's output path, commonly a loose or corroded output terminal connection, or a contactor or wiring issue.
Recommended fixRestart the unit. if the error persists, contact the repair center.
Source:Felicitysolar FLA48200 48V 200Ah 10kWh Lithium Phosphate Battery User Manual.pdf· page 13
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.
Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.