Felicity LPBF48100-M Error Codes: Causes & Fixes (16 codes)

This is the complete fault table for the Felicity LPBF48100-M Battery — all 16 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.

How to read the severity labels

  • Critical(3)— unit trips offline — do not restart before checking
  • Fault(12)— operation stops until cleared
  • Warning(1)— unit keeps running · needs attention

Critical codes (3)unit trips offline — do not restart before checking

ADVISORY: Over-discharge / activation failureCritical

Over-discharge - cannot be re-activated.

Critical

Special Attention bullet on page 1 (section 1.4): 'Due to the built-in protection board of the lithium battery pack is with over-discharge protection function, it is strongly recommended to stop using the load when the battery pack is over-discharged. The battery pack cannot be repeatedly activated for discharge. Or the battery may be failed to be activated by the AC or PV activation cable (it requires a special charging activation method), so cannot be charged.' This is a documented advisory rather than a numbered C-code, but it describes a distinct unrecoverable condition reachable through C02 / C04.

CauseRepeated activation attempts on a deeply over-discharged pack, exhausting the BMS's normal wake-up path so that even AC or PV activation no longer works.

Recommended fixStop using the load as soon as low power is indicated and recharge the battery from mains or solar as soon as possible. if the pack cannot be activated by the AC or PV activation cable, contact the supplier - a special charging activation method is required.

Source:358-010291-07.pdf· page 1

C11Critical

Abnormal current sampling.

Critical

BMS current-sensor / sampling diagnostic failure displayed on the LCD BMS fault code / flag screen (section 4.4); the pack cannot reliably measure charge / discharge current.

CauseInternal current-sensor or sampling-circuit fault on the BMS board.

Recommended fixRestart the unit, if the error persists, contact the repair center.

Source:358-010291-07.pdf· page 9

C12Critical

Abnormal output impedance.

Critical

Output-impedance diagnostic failure displayed on the LCD BMS fault code / flag screen (section 4.4); BMS detected an out-of-spec impedance on the output path.

CauseLoose or corroded output terminal connections, undersized cabling, or internal MOSFET / fuse degradation. Per section 1.3 only qualified service persons may service the device.

Recommended fixRestart the unit, if the error persists, contact the repair center.

Source:358-010291-07.pdf· page 9

Fault codes (12)operation stops until cleared

C01Fault

Battery overvoltage.

Fault

Pack-level over-voltage fault displayed on the LCD BMS fault code / flag screen (section 4.3-4.4); fault icon is constant.

CausePack voltage exceeded the BMS over-voltage threshold during charging - typically because the charger's Max. Charging Voltage is set above the recommended 57.6 V (section 2.4 Recommended Settings).

Recommended fixRestart the unit; if the error persists, contact the repair center. Verify the charger / inverter Max. Charging Voltage and Floating Charging Voltage are set to 57.6 V and pack voltage stays within the 48-57.6 V operating range.

Source:358-010291-07.pdf· page 8

C02Fault

Battery undervoltage.

Fault

Pack-level under-voltage fault displayed on the LCD BMS fault code / flag screen (section 4.4).

CausePack voltage fell below the BMS under-voltage threshold during discharge, typically near the 48 V cut-off voltage (section 2.4). The Special Attention note on page 1 warns that an over-discharged pack cannot be repeatedly activated and may fail to be activated by the AC or PV activation cable.

Recommended fixRestart the unit, if the error persists, contact the repair center. Stop the load and recharge from mains or PV as soon as possible (page 1 Special Attention).

Source:358-010291-07.pdf· page 8

C03Fault

Single cell overvoltage.

Fault

Individual-cell over-voltage fault displayed on the LCD BMS fault code / flag screen (section 4.4); one or more cells exceeded the upper cell-voltage limit.

CauseCell imbalance during charging or charger settings allowing individual cells to drift above their safe ceiling.

Recommended fixRestart the unit, if the error persists, contact the repair center.

Source:358-010291-07.pdf· page 8

C04Fault

Single cell undervoltage.

Fault

Individual-cell under-voltage fault displayed on the LCD BMS fault code / flag screen (section 4.4); one or more cells fell below the lower cell-voltage limit.

CauseDeep discharge or a weak / aged cell pulling below the under-voltage threshold.

Recommended fixRestart the unit, if the error persists, contact the repair center.

Source:358-010291-07.pdf· page 8

C05Fault

Battery charge overcurrent.

Fault

Charge over-current fault displayed on the LCD BMS fault code / flag screen (section 4.4).

CauseCharge current exceeded the recommended limit. Per section 2.3 the recommended charge / discharge current is <=50 A and the Max Charge/Discharge Current (15 s) is 100 A; per section 2.4 Max. Charging Current is 50 A * N (N = number of packs in parallel).

Recommended fixRestart the unit, if the error persists, contact the repair center. Reduce charge current at the charger / inverter to within 50 A per pack (section 2.4).

Source:358-010291-07.pdf· page 8

C06Fault

Battery discharge overcurrent.

Fault

Discharge over-current fault displayed on the LCD BMS fault code / flag screen (section 4.4).

CauseLoad drew more current than the recommended discharge limit (recommended <=50 A, Max 100 A for 15 s per section 2.3) or a short circuit on the DC output. Section 1.3 item 10 warns NEVER to cause AC output / DC input short circuits.

Recommended fixRestart the unit, if the error persists, contact the repair center. Remove or reduce the load and check DC wiring for short circuits.

Source:358-010291-07.pdf· page 8

C07Fault

MOS tube overtemperature.

Fault

MOSFET / BMS power-stage over-temperature fault displayed on the LCD BMS fault code / flag screen (section 4.4).

Cause1. The inner temperature is over the limitation. 2. Check whether the ambient temperature is too high. (Per section 1.3 item 13 the unit must not be installed below 0 degC or over 55 degC, or above 80% humidity; charging temperature range per section 2.3 is 0-55 degC.).

Recommended fix1. The inner temperature is over the limitation. 2. Check whether the ambient temperature is too high. Stop charging / discharging, let the unit cool, and improve ventilation.

Source:358-010291-07.pdf· page 8

C08Fault

MOS tube undertemperature.

Fault

MOSFET / BMS power-stage under-temperature fault displayed on the LCD BMS fault code / flag screen (section 4.4).

Cause1. The internal temperature is lower than the limit range. 2. Check whether the ambient temperature is too low. (Per section 1.3 item 13 the unit must not be installed below 0 degC; charging range per section 2.3 is 0-55 degC.).

Recommended fix1. The internal temperature is lower than the limit range. 2. Check whether the ambient temperature is too low. Move the battery to a warmer environment within the operating range before resuming use.

Source:358-010291-07.pdf· page 8

C09Fault

Single cell overtemperature.

Fault

Individual-cell over-temperature fault displayed on the LCD BMS fault code / flag screen (section 4.4). Example screen on page 7 shows '52.0V / C09 / 70%' with the fault icon constant.

CauseCells heated above the safe operating temperature. Per section 2.3 the discharging temperature range is -20 to +60 degC and the charging temperature range is 0 to +55 degC.

Recommended fixRestart the unit, if the error persists, contact the repair center.

Source:358-010291-07.pdf· page 9

C10Fault

Single cell undertemperature.

Fault

Individual-cell under-temperature fault displayed on the LCD BMS fault code / flag screen (section 4.4).

CauseCell temperature below the allowed range. Per section 2.3 charging is permitted only between 0 and +55 degC, discharging between -20 and +60 degC.

Recommended fixRestart the unit, if the error persists, contact the repair center.

Source:358-010291-07.pdf· page 9

C13Fault

Parallel failed.

Fault

Parallel-mode communication / configuration failure displayed on the LCD BMS fault code / flag screen (section 4.4). Applies when the LPBF48100-M is operated in parallel (up to 6 units / 30 kWh per section 2.3).

CauseSingle unit installed but the system is configured for parallel operation; or a wiring fault between parallel-connected packs (parallel cable / communication cable / DIP-switch address mis-set per section 4.5). Section 4.5 notes that for parallel operation, battery pack IDs must be set to 1-15 via DIP switches SW1-SW4 and SW5 must be ON for termination on the end pack(s).

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:358-010291-07.pdf· page 9

C14Fault

Output loss.

Fault

Output-loss fault displayed on the LCD BMS fault code / flag screen (section 4.4); the BMS detects no output current path / output cannot be enabled.

CauseOpen circuit breaker, blown internal fuse, or other open in the output path. Section 2.3 lists Built-in smart BMS, Fuse as the protection elements.

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:358-010291-07.pdf· page 9

Warning codes (1)unit keeps running · needs attention

FAULT-ICONWarning

Fault indicator (LCD warning icon).

Warning

The LCD's exclamation-mark icon (section 4.2 'Fault information - Indicates a fault') illuminates whenever any C-code fault is active. On the BMS fault code / flag screen the fault icon is constant alongside the displayed C-code (example on page 7: '52.0V / C09 / 70%' with Fault icon constant).

CauseAny of the BMS fault conditions C01-C14 listed in section 4.4.

Recommended fixRead the C-code shown on the LCD BMS fault code screen and follow the corresponding Trouble Shooting entry in section 4.4.

Source:358-010291-07.pdf· page 7

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Common questions about LPBF48100-M error codes

What is the difference between a fault and a warning on the LPBF48100-M?
A fault puts the unit into protection and stops normal operation — this page lists 15 of them for the LPBF48100-M. A warning leaves the unit running; there are 1 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 LPBF48100-M 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 358-010291-07.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.