See our 32 reviews on
See our 32 reviews on
ERROR CODE: E03
ERROR TYPE: Limit ThermostatProtection Error
DESCRIPTION: This error is received, if one of the central heating inlet or return temperature sensors reads over 107°C. The error should be reset when the temperature drops to 85°C.
TYPE: LOCKOUT
SOLUTION:
1- Reset the error.
2- Measure between the terminals of the limit thermostat. If it is not short-circuit, wait for the tank to cool. If there is no short-circuit between the terminals despite the cooling of the tank, replace the limit thermostat and reset the error.
3- If the limit thermostat terminals are measured open circuit, check the pump connections. If the pump cables are connected, make sure that the pump circulates the water while it is energised. If the pump is pressurising the water normally, there may be a blockage in the heating circuit or the valves may be closed. 4- Make sure the motorised valve works normally and moves the pin to switch between domestic water and central heating.
5- If this error is received, although there is a short circuit between the terminals of the limit thermostat, measure the AC voltage between the terminals A1 and A2 of the contactor. If it is close to 230 VAC, check the presence of energy at NO contact terminals no. 13 and 14 with the voltage tester.
6-If one of the terminals no. 13 and 14 is energised and the other is not, replace the contactor, if neither is energised, check the end-to-end integrity of the feedback cables.. If the cables are broken or damaged, replace the high voltage cable group.
7- If the parts are found to be solid after all the checks, the mainboard must be replaced.
Updated on 9 January 2024, Tuesday
