Fault

F91

The number of battery packs in series has not been set.

3 Devices that report this code
T-REX-10KHP3G01Inverter↗ view on device
F91The number of battery packs in series has not been set.Fault
Description

Number of battery packs in series has not been set.

Recommended fix

Please set it correctly according to the number of battery packs used by the inverter.

Source:T-REX-10KHP3G01-Inverter-User-Guide.pdf · page 29
T-REX-10KLP3G01Inverter↗ view on device
F91The number of battery packs in series has not been set.Fault
Description

The number of battery packs in series has not been set.

Cause

The number of battery packs in series has not been set.

Recommended fix

Please set it correctly according to the number of battery packs used by the inverter.

Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf · page 29
T-REX-50KHP3G01Inverter↗ view on device
F91PV hardware overcurrent fault.Fault
Description

PV current is too high, check string current.

Source:T-REX-50KHP3G01-user-manual-.pdf · page 49

Compiled from official FelicityESS user manuals. Always consult your device manual and a qualified technician before performing repairs.