45
Codes fault
CODE DISPLAYED ON
THE DIGITAL ROOM
CONTROLLER
00000
The boiler is fitted with an integrated
diagnostic readout which,
in case of malfunction, consents the immediate individuation
of the type of fault, thanks to the combination of several LEDs
(flashing/on/off) on the control panel display.
Below are listed the types of recognized fault codes.
CODE DISPLAYED ON
THE DIGITAL ROOM
CONTROLLER
1111166666
Return temperature sensor
Description:
Interruption or short circuit of the return sensor.
CODE DISPLAYED ON
THE DIGITAL ROOM
CONTROLLER
03
03
03
03
03
Service parameters
Description:
Alteration of the service parameters caused by electromagnetic
disturbances.
CODE DISPLAYED ON
THE DIGITAL ROOM
CONTROLLER
21
21
21
21
21
Insufficient water circulation
Description:
It is detected when the temperature difference between the
flow temperature sensor and the return temperature sensor is
> 35°C.
It is annulled when the temperature difference is < 25°C.
CODE DISPLAYED ON
THE DIGITAL ROOM
CONTROLLER
04
04
04
04
04
Fan speed adjustment error
Description:
The fan does not reach the requested speed.
CODE DISPLAYED ON
THE DIGITAL ROOM
CONTROLLER
06
06
06
06
06
Overheat heat exchanger
Description:
It is activated when the flow temperature detected by the sensor
in the DHW mode is > 89°C (>92°C in CH mode).
The code is annulled when the temperature detected by the
sensor in DHW mode is <75°C (<80°C in CH mode).
These codes are divided into the following 3 groups:
1
st
group
: they are signalled but boiler operation is normal.
2
nd
group
: the burner is automatically switched off.
3
rd
group
: the burner is automatically switched off. To reset
the boiler it is necessary to disconnect the boiler
from the mains supply.
1° GROUP
2° GROUP
Led On and flashing
Led On and constantly illuminated
Led Off
5
FAULT CODES
No flame detection
Description:
No flame detection during ignition phase: faulty ionisation
electrode.
Refire the boiler by pressing the reset button.
Summary of Contents for ALKON R 24
Page 47: ......
