41
23
Incorrect Operation
CODE FAULT INFORMATION
30 40 50 60 70 80
mmmmml Overheating safety feature.
mmmmll No flame detection.
mmmlml Antifrost mode on (pump in operation).
mmmllm Antifrost mode on (burner and pump in operation).
mmmlll lack of water circulation.
mmlmmm Primary water circulation defect
mmlmll Central heating return thermistor faulty (open circuit).
mmllmm Central heating return thermistor faulty (short circuit).
mmllml Central heating flow thermistor faulty (open circuit).
mmlllm Central heating flow thermistor faulty (short circuit).
mlmmlm Firing problem
mlmlmm Wiring problem (or fuse 1.25 A)
mlmlml Fan on but does not activate air pressure switch.
mlmllm Fan off but air pressure switch fails to return to off position.
mlllll Communication defect with the display PCB.
lmmmmm Communication defect with the main PCB.
If a fault occurs in the appliance, one or more LEDs (23 Fig. 1) flash according to the fault type listed in the table below.
m = LED off
l = LED blinking
If these solutions do not cure the fault, call a qualified professional
Fault
The boiler doesn’t start
Red indicator alight
Noises in CH system
Radiators rise in temperature during
summer time.
Cause
No gas, no water or no electricity
Air in the gas pipe
Room thermostat switched off
Air presence in CH system or.
Insufficient pressure
Gravity effect in the CH system
Solution
Check gas, water and electrical
supply, fuses…
Purge the gas supply
Turn up the room thermostat
Wait for a few minutes
Press the reset button
25 (fig. 7) the red
led will go out and the boiler attempts to
re-light.
If the red indicator lights too frequently,
please call your local service centre.
Purge the system of air and increase
the system pressure (chapter 7)
Close the heating flow isolating valve.
Don’t forget to open it again when the
heating is restarted.
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