2. Error Codes and Solutions
2.1. Solutions for Coded Errors
ERROR
CODE
ERROR
TYPE
DESCRIPTION
TYPE
SOLUTION
E03
Limit Thermostat
Protection Error
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.
LOCKOUT
1-
Reset the error.
2-
Measure between the terminals of the
overheat
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
overheat
thermostat and reset the error.
3-
If the
overheat
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
overheat
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.
E04
Faulty contactor
feedback
If a false feedback is received
even though the contactor
should not be active, this error
is displayed. A RESET
operation is required after the
error is corrected.
LOCKOUT
1-
Reset the error.
2-
If you still receive the error after reset, make sure
that the contactor feedback cables are connected to
terminals no. 13 and 14.
3-
If the error persists even though the feedback
cables are connected to the correct terminals, measure
the resistance between terminals no. 13 and 14 when
the contactor is not energised. If a value other than
open-circuit is displayed, replace the contactor.
4-
If the contactor is steady, check the end-to-end
integrity of the feedback cables.
5-
If the cables are also solid, the mainboard must be
replaced.
E13
Too Frequent
Error Reset
Error
This error is received when 5
errors are reset within 1 hour.
Domestic water and central
heating requests are stopped.
This error can be deleted by
simply cutting off the power
supply to the motherboard.
LOCKOUT
The error is corrected by turning off and on the Circuit
Breaker inside the device or a cutting element in the
front of the supply line.
F33
Central Heating
Return
Temperature
Sensor Error
This error is received if the
central heating return
temperature sensor is short-
circuit, open-circuit, or
damaged. Domestic water and
central heating request is
stopped. When this error is
deleted, normal operation
begins.
ERROR
1- Make sure the NTC cables in the return water line
are plugged in.
2- If the cables are plugged in, check the cables
end-to-end. Make sure the cables are undamaged
and plugged into the mainboard terminal. If there is a
damaged wire, replace the low voltage cable group.
3-
If the cables are not damaged, measure the
resistance between the terminals of the NTC and
check that their values are appropriate.
4-
If the resistance value between the NTC terminals
is according to the table, replace the return and
supply water NTCs. If the error code does not change,
replace the mainboard. If the error code becomes
F35, replace the return water NTC.
F34
Low Voltage
Error
This error is received if the
supply line voltage is below 170
±15 VAC. This error is corrected
if the line voltage is above 180 ±
15 VAC.
ERROR
1- Measure the AC voltage between the phase and
neutral terminals of the mainboard. If the voltage
value is above 195 VAC, check the voltage of the line
and wait for it to increase.
2- If the voltage value is above 195 VAC,
15
