Can I clear the FAULT-LED-BMSTH code myself?

It depends on the severity. Warning-level codes can usually be cleared by following the recommended fix. Fault and critical codes often require checking the source condition first; if the code returns immediately after restart, escalate to authorized service.

Is the FAULT-LED-BMSTH fix the same on every device?

The cause is consistent — it's the same protection logic. The exact fix wording can differ per device because each official manual addresses model-specific context (input ranges, parallel-config notes, firmware revisions). Use the per-device section that matches your unit.

Where does this information come from?

Every entry is sourced directly from the official Felicity user manual for the affected device. The "Source" line at the bottom of each device's section shows the manual filename and page number.

Critical

FAULT-LED-BMSTH

BMS temperature high.

2 Devices that report this code

What does the FAULT-LED-BMSTH error code mean?

FAULT-LED-BMSTH on a Felicity unit indicates: BMS temperature high.. It is a critical-severity event that can appear on 2 different devices in the Felicity catalog. The same code may have slightly different recommended fixes depending on the device — the per-device sections below show the exact wording from each device's official manual.

This is a critical-severity code

Critical codes trip the unit offline immediately. They typically indicate hardware failure (short-circuit, IGBT, BMS) or an unsafe operating condition. Do not bypass the fault — note the code and contact authorized service.

What triggers this code

FAULT-LED-BMSTH is triggered when the unit's protection or monitoring logic detects the specific condition described above. The exact trigger depends on the device — see the per-device sections for the official manual entry for each.

LUX-X-48100LG01Battery↗ view on device

FAULT-LED-BMSTHBMS temperature high.Critical

Description

FAULT mode indicated by RED LED ON with LED1 ON, LED2 ON, LED3 ON, LED4 OFF: BMS PCB / MOSFET temperature above safe limit.

Cause

Inner BMS temperature exceeds limitation; ambient too hot or excessive current.

Recommended fix

Reduce ambient temperature, ensure clearance for heat dissipation, reduce current; allow to cool.

Source:LUX-X-48100LG01-Litium-Battery-User-Guide.pdf · page 15

LUX-X-48100LG01-USBattery↗ view on device

FAULT-LED-BMSTHBMS temperature high.Critical

Description

FAULT mode signalled by RED LED ON with LED1 ON, LED2 ON, LED3 ON, LED4 OFF: BMS PCB / MOSFET temperature above safe limit.

Cause

Inner BMS temperature exceeds limitation; ambient too hot or excessive current.

Recommended fix

Reduce ambient temperature, ensure clearance for heat dissipation, reduce current; allow to cool.

Source:358-S010024-03LUX-X-48100LG01-User-manual_compressed.pdf · page 21

Frequently asked about FAULT-LED-BMSTH

What is the FAULT-LED-BMSTH error on Felicity?: FAULT-LED-BMSTH on a Felicity unit means: BMS temperature high.. It can appear on 2 different devices in the Felicity catalog. The cause and recommended fix are listed for each device on this page.
Can I clear the FAULT-LED-BMSTH code myself?: It depends on the severity. Warning-level codes can usually be cleared by following the recommended fix. Fault and critical codes often require checking the source condition first; if the code returns immediately after restart, escalate to authorized service.
Is the FAULT-LED-BMSTH fix the same on every device?: The cause is consistent — it's the same protection logic. The exact fix wording can differ per device because each official manual addresses model-specific context (input ranges, parallel-config notes, firmware revisions). Use the per-device section that matches your unit.
Where does this information come from?: Every entry is sourced directly from the official Felicity user manual for the affected device. The "Source" line at the bottom of each device's section shows the manual filename and page number.

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