Unical ALKON 50 kW - Page 60

60
Fault finding
Code:
Description:
Lack of water (only for pump with SensorLogic)
Corrective action:
Fill the hydraulic circuit
Code:
Code:
Description:
Flame detected before the starting of the
ignition cycle
Corrective action:
Disconnect the lead of the ionisation probe
from the control PCB; if the error code
disappears replace the lead,otherwise replace
the control PCB.
Code:
Description:
Flame detected after burner extinction
Corrective action:
Disconnect the cable of the valve gas from the
control PCB; if the error code disappears to
replace the cable, otherwise replace the gas
valve.
Code:
Description:
Internal fault
Corrective action:
Replace the Control PCB.
Description:
Fault at the heating flow sensor (SR)
Corrective action:
Corrective action: Check the efficiency of the
sensor and/or its wiring
E 8
E 11
E 20
E 10
E 12
Code:
Description:
Alteration of the operating parameters
caused by EMC disturbances
Corrective action:
Restore the factory parameters
E 30
Code:
E 16
Code:
E 26
Code:
E 24
Code:
E 1
Description:
Modulating fan failure
Corrective action:
Check the fan’s wiring
Description:
Modulating fan failure
Corrective action:
Check the fan’s wiring
Description:
Main heat exchanger frozen
Corrective action:
Carefully de-frost the exchanger
Description:
Intervention of the overheat safety thermostat (TL)
Corrective action:
Press the reset key on the control panel