54
If these solutions do not cure the fault, call a qualified professional
19. Incorrect function (continued)
F
ault
C
ause
S
olution
The boiler doesn’t start
No gas, no water or no electricity
Check gas, water and electrical
s
upplies, fuses…
Air in the gas pipe Purge the air from the gas pipe
Room thermostat switched off Turn the room thermostat up
Red indicator alight
Overheat lockout (A01)
No flame after safety time (A03)
N
o flame detected (E04)
Flame lift (E18)
Wait for a few minutes
Press the reset button 28 (Fig. 107) the
red led goes out and the boiler attempts to
r
e-light.
If the red indicator lights too frequently,
please call your local service centre.
Noises in CH system
Air presence in CH system or
insufficient pressure
Purge the system of air (Section 14.2,
page 29) and increase the system
pressure (Section 2, page 6)
Radiators rise in temperature During
summer season
Gravity effect in the CH system
Diverter valve sticking
Close the heating flow isolating valve (41
Fig. 2, page 5). Don’t forget to open it
again before starting the heating.
Remove and Clean
20. Maintenance
It is recommended that the following inspections be carried
out on the boiler at least once a year;
1. Check the seals in the water group, and if necessary,
replace the gasket and restore the seal to perfect working
order;
2. Check the seals in the gas group, and if necessary
replace the gaskets and restore the seal to perfect
working order;
3. Visually check the overall condition of the boiler;
4. Visually check the combustion, and if necessary,
disassemble and clean the burner;
5.
Following inspection 3, disassemble and clean the
combustion chamber as necessary;
6. Following inspection 4, disassemble and clean the
injector, if necessary;
7. Clean the primary heat exchanger. (see Section 20.2);
8. Check and adjust the CO
2 emissions as necessary (see
Section 14.3);
9. Check the correct operation of the heating safety devices:
- Overheat thermostat
10. Check the correct operation of the flow switches;
11. Check the correct operation of the low pressure switch;
12. Check the diverter valve movement;
13. Check the correct operation of the gas group safety
devices:
- absence of gas or flame safety device (ionisation);
14.
Check that the electrical connections are correct (as
described in Section 13, page 26 Fig 29);
15. Check the efficiency of the production of domestic hot
water (test the flow rate and temperature rise);
16. Carry out a general inspection of the boiler;
17.
Check the flue and termination point;
18. Remove any oxide from the detection electrode by using
an emery cloth.
Cleaning the exhaust side
Remove the air gas assembly (Section 18.2.1). Check that
the exhaust passages are free, if there are deposits present,
clean the exchanger with compressed air or wash with water
or a vinegar based detergent.
20.1 General remarks
20.2 Cleaning the primary exchanger
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