COMM-FAULTFault

Felicity battery error COMM-FAULT

Unable to Communicate with Inverter

Fault — the battery 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.

FLB48314TG1

BatteryFault

What it means

Unable to Communicate with Inverter — Wrong communication cable used, or battery DIP switch settings are incorrect.

Cause: Communication has been lost between the inverter and a peripheral device — typically a battery BMS, smart meter, or external monitoring dongle.

How to fix it

  1. Before connecting battery to inverter, set battery DIP switches correctly per the DIP switch table.
  2. After setting DIP switches, restart the battery to activate the DIP, then use correct communication cable.

Source: Felicity-FLB48314TG1-Manual.pdf

Frequently asked questions

What does error COMM-FAULT mean on a Felicity battery?
COMM-FAULT means: Unable to Communicate with Inverter. Communication has been lost between the inverter and a peripheral device — typically a battery BMS, smart meter, or external monitoring dongle.
Is error COMM-FAULT a fault or a warning?
COMM-FAULT is a fault code: the battery enters protection and stops normal operation until it is cleared.
How do I clear or fix error COMM-FAULT?
Before connecting battery to inverter, set battery DIP switches correctly per the DIP switch table. After setting DIP switches, restart the battery to activate the DIP, then use correct communication cable.

Related error codes

Other codes on the FLB48314TG1

All FLB48314TG1 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.