-Connection of switch pressure terminals before pre-purge
-Flame Return thermostat is disconnected
-Limit control thermostat is disconnected
To remove the errors, after study and removal of the problem by the experienced technician of Energy Co., and or qualified technician, push the (OK) key twice,
so, the thermostat will be turned back to normal mode With disconnection and connection of the main electricity of the heater, thermostat will turn back to