Fault
1 Devices that report this code42
Relay check failure.
42Relay check failure.Fault
Description
Relay check failure.
Recommended fix
Restart the unit, if the error persists, contact the repair center.
Source:
T-REX-3_3.6_4_4.6_5_6KLP1G01-hybrid-inverter-user-guide-English.pdf · page 38Compiled from official FelicityESS user manuals. Always consult your device manual and a qualified technician before performing repairs.