Possible Problems And Their Causes - Immergas MINI EOLO X 24 3 E Instructions And Warnings

3.6

POSSIBLE PROBLEMS AND THEIR CAUSES.

Maintenance interventions must be carried out by
an authorised company (e.g. Authorised After-Sales
Technical Assistance Service).
Trouble
Smell of gas
The fan works but ignition
discharge does not occur
on the burner ramp
Irregular combustion (red
or yellow flame).
Frequent activation of
the temperature overload
thermostat
Abnormal noises in the
system
Ignition block
Presence of condensation
on the boiler.
40
Possible causes
Caused by leakage from gas circuit pipelines Check sealing efficiency of gas intake circuit.
The fan may start but the safety air pressure
switch does not switch the contact over.
Can be caused by: dirty burner, clogged
lamellar pack, intake - exhaust terminal not
installed properly.
It can depend on reduced water pressure in
the boiler, little circulation in the heating
system, the blocked pump or an anomaly
of the boiler P.C.B.
Air in the system.
In the event of request of room central
heating or domestic hot water production,
the boiler does not switch on within the
preset time. Upon appliance commission-
ing or after extended downtime, it may be
necessary to eliminate the block.
It can be determined by functioning at
boiler temperatures that are excessively low.
Make sure:
1) the intake-exhaust duct is not too long (over allowed length).
2) the intake-exhaust pipe is not partially blocked (on the exhaust or
intake side).
3) the diaphragm of the fume exhaust is adequate for the length of the
intake-exhaust duct.
4) the sealed chamber is kept in good conditions.
5) the fan power supply voltage is not less than 196 V.
Clean the above components and ensure correct installation of the ter-
minal.
- Check on the pressure gauge that the system pressure is within established
limits.
- Check that radiator valves are not all closed.
- Check opening of the special air vent valve cap (Fig. 33).
- Make sure the system pressure and expansion vessel factory-set pressure
values are within the set limits; the factory-set value for the expansion
vessel must be 1.0 bar, and system pressure between 1 and 1.2 bar.
Press the Reset button.
In this case, make theboiler run at higher temperatures.
Solutions