Boiler Shutdown - Immergas Maior Eolo 24 4E Installation Manual

Maximum N° of reset. To eliminate any "ano-
maly" the Reset button (5) must be pressed. The
Anomaly can be reset 5 times consecutively,
after which the function in inhibited for at least
one hour. One attempt is gained every hour for
a maximum of 5 attempts.
Insufficient system pressure. Water pressure
inside the heating system (code 10), sufficient to
guarantee the correct functioning of the boiler,
is not detected. Check that the system pressure
is between 1÷1.2 bar.
Flue gas pressure switch failure. It occurs in the
case of an error on the circuit board that gives
consent for fan start-up incorrectly or in the
case of flue-gas pressure switch fault (code 11).
If normal conditions are restored the boiler
restarts without having to be reset. If this ano-
maly persists, contact a qualified technician for
assistance (e.g. Immergas After-Sales Technical
Assistance Service).
Configuration error. If the board detects an
anomaly or incongruency on the electric wiring,
the boiler will not start. If normal conditions are
restored the boiler restarts without having to be
reset. If this anomaly persists, contact a qualified
technician for assistance (e.g. Immergas After-
Sales Technical Assistance Service).
Parasite flame. This occurs in case of a leak on
the detection circuit or anomaly in the flame
control unit. (code 20), try to reset the boiler.
If the anomaly continues contact a qualified
technician (e.g. Immergas After-Sales Technical
Assistance Service).
Push button control panel anomaly. This occurs
when the circuit board detects an anomaly on the
push button control panel. If normal conditions
are restored the boiler restarts without having
to be reset. If this anomaly persists, contact a
qualified technician for assistance (e.g. Immergas
After-Sales Technical Assistance Service).
Insufficient circulation. This occurs if the boiler
overheats due to insufficient water circulating in
the primary circuit (code 27); the causes can be:
- low circulation; check that no interception
devices are closed on the central heating circuit
and that the system is free of air (deaerated);
- pump blocked; free the pump.
If this phenomenon occurs frequently, contact a
qualified technician for assistance (e.g. Immergas
After-Sales Technical Assistance Service).
Loss of Remote Control communication.
This occurs 1 minute after communication loss
between the boiler and the remote control (code
31). To reset the error code, remove and re-apply
voltage to the boiler. If this phenomenon occurs
frequently, contact a qualified technician for
assistance (e.g. Immergas After-Sales Technical
Assistance Service).
Low power supply voltage. This occurs when
the power supply voltage is lower than the
allowed limits for the correct functioning of
the boiler. If normal conditions are restored,
the boiler re-starts without having to be reset.
If this phenomenon occurs frequently, con-
tact a qualified technician for assistance (e.g.
Immergas After-Sales Technical Assistance
Service).
Loss of flame signal. This occurs when the
boiler is ignited correctly and the burner flame
switches off unexpectedly; a new attempt at
ignition is performed and if normal conditions
are restored, the boiler does not have to be
reset. If this phenomenon occurs frequently,
contact a qualified technician for assistance
(e.g. Immergas After-Sales Technical Assi-
stance Service).
Block due to loss of continuous flame signal
This occurs if the "Flame signal loss" error
occurs 6 times consecutively in 8.5 minutes
(38)". To eliminate the block, the Reset button
(5) must be pressed. If this phenomenon occurs
frequently, contact a qualified technician for
assistance (e.g. Immergas After-Sales Technical
Assistance Service).
Block for maximum time, gas valve opening.
This occurs if the gas valve remains open for
a time longer than that envisioned for normal
functioning, without the boiler switching on.
To eliminate the block, the Reset button (5)
must be pressed. If this phenomenon occurs
frequently, contact a qualified technician for
assistance (e.g. Immergas After-Sales Technical
Assistance Service).

2.6 BOILER SHUTDOWN

For complete boiler switch-off, press the "off "
button, disconnect the onmipolar switch outside
of the boiler and close the gas cock upstream
from the appliance. Never leave the boiler
switched on if left unused for prolonged periods.
2.7 RESTORE CENTRAL HEATING
SYSTEM PRESSURE.
Periodically check the system water pressure.
The boiler pressure gauge should read a pressure
between 1 and 1.2 bar.
If the pressure is below 1 bar (with the circuit cool)
restore normal pressure via the cock located in the
lower part of the boiler (Fig. 2-2).
N.B.: close the cock after the operation.
If pressure values reach around 3 bar the safety
BOTTOM VIEW
valve may be activated.
In this case contact a professional technician
for assistance.
In the event of frequent pressure drops, contact
qualified staff for assistance to eliminate the
possible system leakage.
2.8 SYSTEM DRAINING.
To drain the boiler, use the special draining
valve (Fig. 2-2)
Before draining, ensure that the filling valve is
closed.
2.9 ANTI-FREEZE PROTECTION.
The boiler has an anti-freeze function that
switches on automatically when the temperature
falls below 4°C (standard protection to minimum
temperature of -5°C). In order to guarantee the
integrity of the appliance and the domestic hot
water heating system in zones where the tem-
perature falls below zero, we recommend the
central heating system is protected using anti-
freeze liquid and installation of the Immergas
Anti-freeze Kit in the boiler (Par. 1.3). In the
case of prolonged inactivity (second case), we
also recommend that:
- disconnect the electric power supply;
- the central heating circuit and boiler domestic
hot water circuit must be drained. In systems
that are drained frequently, filling must be car-
ried out with suitably treated water to eliminate
hardness that can cause lime-scale.
2.10 CASE CLEANING.
Use damp cloths and neutral detergent to clean
the boiler casing. Never use abrasive or powder
detergents.
2.11 DECOMMISSIONING.
In the event of permanent shutdown of the boiler,
contact professional staff for the procedures and
ensure that the electrical, water and gas supply
lines are shut off and disconnected.
FILLING VALVE
DRAINING
VALVE
ES
PT
GR
CZ
HU
IE
Fig. 2-2
159