Immergas EOLO Maior, Instruction And Recomendation Booklet

Page: 22 / 40

22
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
2.5 TROUBLESHOOTING.
In the event of an anomaly, it is signalled via
the flashing indicator (14) on the boiler display
according to the following table. On the remote
control, the error code will be displayed by means
of the same numeric code represented according
to the following example (e.g. CAR
V2
= Exx).
Error
Code
Anomaly signalled Cause Boiler status / Solution
01
No 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 commissioning or after extended downtime, it may be neces-
sary to eliminate the block.
Press the Reset button (1).
02
Safety thermostat
block (overheat-
ing), flame control
anomaly
During normal operation, if a fault causes excessive overheating internally,
the boiler goes into overheating block.
Press the Reset button after cooling (1).
03 Fan anomaly
This occurs if the fan is blocked or if the intake or drain pipes are ob-
structed.
If normal conditions are restored the boiler
restarts without having to be reset (1).
04
Contacts resistance
block
The P.C.B. detects an anomaly on the gas valve supply. Check the connec-
tion. (the anomaly is detected and displayed only in the event of a request). Press the Reset button (1).
05
Flow probe
anomaly
The board detects an anomaly on the flow probe. The boiler does not start (1).
06
Domestic hot water
probe anomaly
The board detects an anomaly on the domestic hot water NTC probe.
In this case the boiler continues to produce
domestic hot water but not with optimal
performance. Also, in this case the .D.H.W.
antifreeze function (1) is unabled.
08
Maximum N° of
reset
Number of allowed resets that have already performed.
Attention: 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. By switching the appliance on and
off the 5 attempts are re-acquired.
10
Insufficient system
pressure
Water pressure inside the central heating circuit that is sufficient to guar-
antee the correct operation of the boiler is not detected.
Check on the boiler pressure gauge (1) that
the system pressure is between 1÷1.2 bar
and restore the correct pressure if necessary.
11
Flue pressure
switch failure
This occurs in the event of an error on the P.C.B. that enables fan start-up
incorrectly or in the event of a flue-gas pressure switch fault.
If normal conditions are restored the boiler
restarts without having to be reset (1).
15 Configuration error
If the board detects an anomaly or incongruity on the electric wiring, the
boiler will not start.
If normal conditions are restored the boiler
restarts without having to be reset (1).
20
Parasite flame
This occurs in the event of a leak on the detection circuit or anomaly in
the flame control unit.
Press the Reset button (1).
24
Push button control
panel anomaly
The board detects an anomaly on the pushbutton panel.
If normal conditions are restored the boiler
restarts without having to be reset (1).
27
Insufficient circula-
tion
This occurs if there is overheating in the boiler due to insufficient water
circulating in the primary circuit; the causes can be:
- low system circulation; check that no shut-off devices are closed on the
heating circuit and that the system is free of air (deaerated);
- pump blocked; free the pump.
Press the Reset button (1).
31
Loss of remote
control communi-
cation.
This occurs if an incompatible remote control is connected, or if com-
munication between the boiler and the remote control is lost.
Power cycle the boiler. If the Remote Con-
trol is still not detected on re-starting the
boiler will switch to local operating mode,
i.e. using the controls on the control panel.
In this case the “Central heating” mode (1)
cannot be activated.
37
Low power supply
voltage
This occurs when the power supply voltage is lower than the allowed limits
for the correct boiler operation.
If normal conditions are restored the boiler
restarts without having to be reset (1).
38 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 normal conditions are restored the boiler
restarts without having to be reset (1).
43
Block due to loss of
continuous flame
signal
This occurs if the ''Flame signal loss'' error occurs 6 consecutive times
in 8.5 minutes.
Press the Reset button (1).
44
Block for maximum
time, partial gas
valve opening
This occurs if the gas valve remains open for longer than required for
normal operation, without the boiler switching on.
Press the Reset button (1).
(1) If the shutdown or fault persists, contact an authorised company (e.g. Authorised Technical After-Sales Service).