What it means
Battery cluster cell undertemperature alarm (level 2)
Cause: Cell minimum temperature < 0°C.
How to fix it
- Send faults externally and limit power.
- Recovers when Temp_min > 5°C.
Source: fls-es232lc-g-2-fls-es232lc-s-user-guide-en.pdf
Felicity ESS error 0x1022
Battery cluster cell undertemperature 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 0x1022 mean on a Felicity ESS?
0x1022 means: Battery cluster cell undertemperature alarm (level 2). Cell minimum temperature < 0°C.
Is error 0x1022 a fault or a warning?
0x1022 is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.
How do I clear or fix error 0x1022?
Send faults externally and limit power. Recovers when Temp_min > 5°C.
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.