Error
Code
Error
Fault
Possible Cause
Solution(s)
E 62
Calibration demand
The boiler does not operate,
E62 error code blinks
> Calibration not
performed
> PCB was replaced,
but service key of the
replaced was not used
> Service key damaged or
disconnected
> Updating software
(possible)
1-) Restart the boiler by pushing RESET button.
2-) Call the authorized service if fault remains unsolved.
E 72
Delta T heating did not occur in
combustion
The boiler does not operate,
E72 error code blinks
> SUPPLY or RETURN
Sensor is not in correct
position
1-) Restart the boiler by pushing RESET button.
2-) Call the authorized service if fault remains unsolved.
E 74
Second Heating System
Temperature Sensor is faulty
The boiler does not operate,
E74 error code blinks
> SUPPLY AND LIMIT
Sensor (dual NTC) is faulty
1-) Restart the boiler by pushing RESET button.
2-) Call the authorized service if fault remains unsolved.
E 77
Absolute current value is reached The boiler does not operate,
E77 error code blinks
> Gas Supply Pressure
> Wearing or corrosion of
electrode
> Mixing of flue gas with
fresh air
> Clogging in flue or false
flue
> Electrode position
> Interruption on cable
> Burning calibration
> Electronic board
> Gas valve fault
1-) Restart the boiler by pushing RESET button.
2-) Call the authorized service if fault remains unsolved.
E 78
Maximum regulating current value
is reached
The boiler does not operate,
E78 error code blinks
> Gas Supply Pressure
> Wearing or corrosion of
electrode
> Mixing of flue gas with
fresh air
> Clogging in the flue or
incorrect flue installation
> Electrode position
> Interruption on cable
> Burning calibration
> Electronic card
> Gas valve fault
1-) Restart the boiler by pushing RESET button.
2-) Call the authorized service if fault remains unsolved.
E 79
Minimum regulating current value
is reached
The boiler does not operate,
E79 error code blinks
> Gas Supply Pressure
> Wearing or corrosion of
electrode
> Mixing of flue gas with
fresh air
> Clogging in the flue or
incorrect flue installation
> Electrode position
> Interruption on cable
> Burning calibration
> Electronic card
> Gas valve fault
1-) Restart the boiler by pushing RESET button.
2-) Call the authorized service if fault remains unsolved.
E 80
Fault in electronic gas valve driver The boiler does not operate,
E80 error code blinks
> Electronic card
> Gas valve fault
1-) Restart the boiler by pushing RESET button.
2-) Call the authorized service if fault remains unsolved.
E 81
Ignition blockage during start (1)
The boiler does not operate,
E81 error code blinks
> Excessive flue clogging
> Ignition fault
> False flue
> Gas Supply Pressure
> Wearing or corrosion of
electrode
> Recirculation in flue gas
route
> Electrode position
> Burning calibration
1-) Restart the boiler by pushing RESET button.
2-) Call the authorized service if fault remains unsolved.
E 84
Capacity reduction for detected
(assumed) low gas supply
pressure
The boiler does not operate,
E84 error code blinks
> Gas Supply Pressure
> Ignition fault
1-) If wind velocity is high (e.g. windstorm) wait for the
windstorm to stop, then restart the boiler by pushing RESET
button.
2-) Call Authorized service if the fault remains unsolved.
E 87
Fault in electronic gas valve circuit The boiler does not operate,
E87 error code blinks
> Interruption on cable
> Gas valve fault
1-) Restart the boiler by pushing RESET button.
2-) Call the authorized service if fault remains unsolved.
E 88
Fault in electronic gas valve circuit The boiler does not operate,
E88 error code blinks
> Interruption on cable
> Gas valve fault
1-) Restart the boiler by pushing RESET button.
2-) Call the authorized service if fault remains unsolved.
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