What it means
ARM software fault - AC undervoltage
Cause: AC bus undervoltage.
How to fix it
- Reset to restart.
- Check AC switch and AC fuse.
Source: FLS-ES232LC-S.pdf
Felicity ESS error PCS-ARM-10
ARM software fault - AC undervoltage
Warning — a protection warning — the ESS unit keeps running, but deal with the cause before it escalates.
Frequently asked questions
- What does error PCS-ARM-10 mean on a Felicity ESS?
- PCS-ARM-10 means: ARM software fault - AC undervoltage. AC bus undervoltage.
- Is error PCS-ARM-10 a fault or a warning?
- PCS-ARM-10 is a warning: the unit keeps running. Fix the underlying condition before it escalates.
- How do I clear or fix error PCS-ARM-10?
- Reset to restart. Check AC switch and AC fuse.
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.