LPBF48100-M

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.

Repeated 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.

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

Pack 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).

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

Pack 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.

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.

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

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.

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

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

Charge 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).

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

Load 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.

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

1. 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.).

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

1. 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.).

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.

Cells 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.

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

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

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.

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

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.

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

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).

Single 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).

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.

Open 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.

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).

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