Immergas 3.025499, Instruction And Recomendation Booklet

Page: 32 / 68

32
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
2.9 TROUBLESHOOTING.
The boiler signals any anomalies via the flashing
symbol (5) along with the “ERRxx” indication on
the indicator (6) where “xx” corresponds to the
error code described in the following table. The
remote zone control displays the anomaly symbol
“ ” and the relative error code.
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 necessary to eliminate the block.
Press the Reset button (1) (2).
02
Safety thermostat
block (overheating),
flame control or fumes
thermofuse anomaly
During normal operation, if a fault causes excessive overheating inter-
nally, the boiler goes into overheating block.
Press the Reset button (1) (2).
04
Contacts resistance
block
Safety thermostat fault (overheating) or flame control anomaly. Press the Reset button (1) (2).
05 Flow probe anomaly The board detects an anomaly on the flow NTC probe. The boiler does not start (1) (2).
06
Domestic hot water
probe anomaly
The board detects an anomaly on the domestic hot water NTC probe.
In this case the antifreeze function is also inhibited.
In this case the boiler continues to pro-
duce domestic hot water but not with
optimal performance (1).
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
guarantee 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.
12
Storage tank probe
anomaly
The board detects an anomaly on the storage tank probe.
The boiler cannot produce domestic
hot water, domestic water heating is en-
trusted to the solar system and Pdc (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) (2).
16
Fan anomaly
This occurs if the fan has a mechanical or electrical fault. Press the Reset button (1) (2).
20
Parasite flame block
This occurs in the event of a leak on the detection circuit or anomaly
in the flame control unit.
Press the Reset button (1) (2).
23 Return probe anomaly The board detects an anomaly on the return NTC probe. The boiler does not start (1) (2).
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 circulation
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) (2).
32
Low temperature zone 2
probe anomaly
If the board detects an anomaly on the low temperature zone 2 probe,
the boiler cannot work in the affected area.
(1).
33
Low temperature zone 3
probe anomaly
If the board detects an anomaly on the low temperature zone 3 probe,
the boiler cannot work in the affected area.
(1).
36
IMG Bus communica-
tion loss
Communication between the control units is interrupted due to an
anomaly on the boiler control unit or on the IMG Bus.
The boiler does not satisfy the room heat-
ing and cooling requests (1).
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) (2).
38 Loss of flame signal
This occurs when the boiler is ignited correctly and the burner flame
switches off unexpectedly; a new ignition attempt is performed and if
normal conditions are restored, the boiler does not need to be reset
(this fault can be checked in the list of errors in the “M1” menu only).
If normal conditions are restored the
boiler restarts without having to be reset
(1) (2).
(1) If the shutdown or fault persists, contact an authorised company (e.g. Authorised Technical After-Sales Service).
(2) The boiler does not start, the heat pump stays active to satisfy the room heating and cooling requests
(3) The heat pump does not start, the boiler stays active to satisfy the room heating and domestic hot water production requests