What it means
Battery cluster cell undervoltage alarm (level 2)
Cause: Cell voltage < 2,400 mV.
How to fix it
- Send faults externally and limit power.
- Recovers when > 2,500 mV.
Source: FLS-ES232LC-S.pdf
Felicity ESS error 0x1042
Battery cluster cell undervoltage alarm (level 2)
Fault — the ESS unit enters fault protection and stops normal operation until the fault is cleared — how it is shown (LED pattern or display code) depends on the model.
Frequently asked questions
- What does error 0x1042 mean on a Felicity ESS?
- 0x1042 means: Battery cluster cell undervoltage alarm (level 2). Cell voltage < 2,400 mV.
- Is error 0x1042 a fault or a warning?
- 0x1042 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.
- How do I clear or fix error 0x1042?
- Send faults externally and limit power. Recovers when > 2,500 mV.
Related error codes
Other codes on the FLS-ES232LC-S
- 0x10A1WarningCell voltage accumulation overvoltage alarm in battery cluster (level 1).
- 0x10A2FaultCell voltage accumulation overvoltage alarm in battery cluster (level 2).
- 0x10A3CriticalCell voltage accumulation overvoltage alarm in battery cluster (level 3).
- 0x10B1WarningCell voltage accumulation undervoltage alarm in battery cluster (level 1).
- 0x10B2FaultCell voltage accumulation undervoltage alarm in battery cluster (level 2).
- 0x10B3CriticalCell voltage accumulation undervoltage alarm in battery cluster (level 3).
Prefer the full written guide? Read the complete Felicity inverter error-code guide
Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.