Immergas MINI EOLO 28 3E - Possible Problems and Their Causes

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INSTALLER
USER
MAINTENANCE TECHNICIAN
TECHNICAL DATA
3.6 Possible problems and their causes.
Maintenance interventions must be carried out by
an authorised company (e.g. Authorised Aer-Sales
Technical Assistance Service).
Trouble Possible causes Solutions
Smell of gas Caused by leakage from gas circuit pipelines Check sealing eciency of gas intake circuit.
e fan works but ignition
discharge does not occur
on the burner ramp
e fan may start but the safety air pressure
switch does not switch the contact over.
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.
Irregular combustion (red
or yellow ame).
Can be caused by: dirty burner, clogged
lamellar pack, intake - exhaust terminal not
installed properly.
Clean the above components and ensure correct installation of the ter-
minal.
Frequent activation of
the temperature overload
thermostat
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.
- Check on the pressure gauge that the system pressure is within established
limits.
- Check that radiator valves are not all closed.
Abnormal noises in the
system
Air in the system.
- Check opening of the special air vent valve cap (Fig. 32).
- 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.
Ignition block
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 aer extended downtime, it may be
necessary to eliminate the block.
Press the Reset button.
Presence of condensation
on the boiler.
It can be determined by functioning at
boiler temperatures that are excessively low.
In this case, make theboiler run at higher temperatures.