What does error PCS-ARM-46 mean on a Felicity ESS?

PCS-ARM-46 means: ARM software fault - EMS communication failure. Communication with EMS lost.

Is error PCS-ARM-46 a fault or a warning?

PCS-ARM-46 is a warning: the unit keeps running. Fix the underlying condition before it escalates.

How do I clear or fix error PCS-ARM-46?

Verify the communication cable (CAN/RS485/Modbus) is correctly seated and the right pinout is used. Check baud rate and protocol settings in both devices match.

PCS-ARM-46

Felicity ESS error PCS-ARM-46

ARM software fault - EMS communication failure

Warning — a protection warning — the ESS unit keeps running, but deal with the cause before it escalates.

FLS-ES232LC-S

Energy storage systemWarning

What it means

ARM software fault - EMS communication failure

Cause: Communication with EMS lost.

How to fix it

Verify the communication cable (CAN/RS485/Modbus) is correctly seated and the right pinout is used.
Check baud rate and protocol settings in both devices match.
Reseat the dongle/comms module.
For BMS comms, confirm the battery is powered on and not in deep-discharge protection.

Source: FLS-ES232LC-S.pdf

Frequently asked questions

What does error PCS-ARM-46 mean on a Felicity ESS?: PCS-ARM-46 means: ARM software fault - EMS communication failure. Communication with EMS lost.
Is error PCS-ARM-46 a fault or a warning?: PCS-ARM-46 is a warning: the unit keeps running. Fix the underlying condition before it escalates.
How do I clear or fix error PCS-ARM-46?: Verify the communication cable (CAN/RS485/Modbus) is correctly seated and the right pinout is used. Check baud rate and protocol settings in both devices match.

Related error codes

Other codes on the FLS-ES232LC-S

All FLS-ES232LC-S codes

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.