Immergas MINI NIKE 24 4 ERP, Instruction And Warning Book

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14
2-2
INS
TALL
AT
O
R
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
Key:
1 - Filling valve
2 - Draining valve
BOTTOM VIEW
Code dis-
played
(flashing)
Anomaly signalled Cause Boiler status / Solution
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 water
circulation
This occurs if there is overheating in the boiler due to insufficient water
circulating in the primary circuit; the causes can be:
- system low circulation;
- locked circulating pump
- check that no shutoff devices are closed on
the heating circuit and that the system is
free of air (deaerated);
- free the circulating pump (1).
31
Loss of remote control
communication
This occurs if an incompatible remote control is connected, or if
communication 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” (1) mode
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 many times in a
row within a preset period (38).
Press the Reset button, before restarting,
the boiler will run a post-ventilation cycle
(1).
(1) If the shutdown or fault persists, contact an authorised company (e.g. Technical After-Sales Service).
2.7 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.
2.8 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
valve may be activated.
In this case, remove water from an air vent valve
of a radiator until 1 bar is reached or ask for as-
sistance from an authorised company.
In the event of frequent pressure drops, contact
a qualified firm for assistance to remove any
system leakage.
2.9 SYSTEM DRAINING.
To drain the boiler, use the special draining
valve (Fig. 2-2)
Before draining, ensure that the filling valve is
closed.
2.10 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 tempera-
ture falls below zero, we recommend the central
heating system is protected using anti-freeze
liquid. 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.
2.11 CASE CLEANING.
Use damp cloths and neutral detergent to clean
the boiler casing. Never use abrasive or powder
detergents.
2.12 DECOMMISSIONING.
In the event of permanent shutdown of the
boiler, contact an authorised company for the
suitable procedures and also ensure the electri-
cal, water and fuel supply lines are shut off and
disconnected.