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.

Felicity battery error T1

Keine Kommunikation mit Wechselrichter

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

Keine Kommunikation mit Wechselrichter — 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 (Falsches Kommunikationskabel verwendet oder DIP-Schalter falsch eingestellt).

How to fix it

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.

Source: Benutzerhandbuch - Felicity FLS48100SG2.pdf, p.27

Frequently asked questions

What does error T1 mean on a Felicity battery?: T1 means: Keine Kommunikation mit Wechselrichter. The wrong communication cable was used, or the battery DIP-switch settings are incorrect (Falsches Kommunikationskabel verwendet oder DIP-Schalter falsch eingestellt).
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

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.