F2 - Charging module communication failure
F3 - battery failure
F4 - battery overvoltage
F5 - battery undervoltage
F6 - Inverter abnormal
F7 - The power supply module is abnormal
F8 - Battery charge and discharge overcurrent/short circuit
F9 - DC output overcurrent/short circuit
A solid Thermostat icon (High temperature symbol) - Charge and discharge high temperature
A hollow Thermostat icon (Low temperature symbol) - Charge and discharge low temperature