T1Fault

Felicity battery error T1

Unable to communicate with the 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.

FLS48100SG2

BatteryFault

What it means

Unable to communicate with the inverter — Unable to communicate with the inverter. Maintenance troubleshooting item (no LCD code).

Cause: The wrong communication cable was used, or the battery DIP-switch settings are incorrect.

How to fix it

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

Source: fls48100sg2-datasheet.pdf, p.27

Models that show T1

Frequently asked questions

What does error T1 mean on a Felicity battery?

T1 means: Unable to communicate with the inverter. The wrong communication cable was used, or the battery DIP-switch settings are incorrect.

Is error T1 a fault or a warning?

T1 is a fault code: the battery enters protection and stops normal operation until it is cleared.

How do I clear or fix error T1?

Before connecting the battery to the inverter, set the battery DIP switches correctly according to the DIP-switch table. After setting the DIP switches, restart the battery to activate the DIP, then use the correct communication cable to connect the battery and the inverter.

Related error codes

Other codes on the FLS48100SG2

T1 is in the "Fault" class on the FLS48100SG2: 21 of the 21 codes documented for it.

All FLS48100SG2 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.