E05 Water tank temperature is too high
Fault action
1 Display fault
2 Stop all outputs except water pump
Fault handling
1 Check if the water temperature is higher than 43℃
2 Check if the water pump and water flow are normal during heating
3 Check if the T1 and T2 plugs and wiring are reliable
4 Check or replace the T1 and T2 temperature sensors, check or replace the control board