Immergas NIKE Mini 28 kW Special Manual De Instrucciones página 80

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Ignition block. The boiler ignites automatically with each demand for room
heating or hot water production. If this does not occur within 10 seconds,
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the boiler remains in stand-by for 30 seconds, try again and if the second
attempt fails it goes into "ignition block" (flashing LED 6). To eliminate
"ignition block" the main selector switch (9) must be turned to the Reset
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position. he Anomaly can be reset 5 times consecutively, after which the
function is 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. On commissioning or after extended inactivity
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it may be necessary to eliminate the "ignition block". If this phenomenon
occurs frequently, contact a qualified technician for assistance (e.g. Immergas
After-sales Service).
Safety thermostat block (over-temperature).During operation, if a fault
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causes excessive overheating internally, in the exhaust, or an anomaly
occurs in the flame control section, an over-temperature block is triggered
in the boiler (LED 7 flashing). To eliminate the "over-temperature block",
turn the main selector switch (9) temporarily to the Reset position. If this
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phenomenon occurs frequently, contact a qualified technician for assistance
(e.g. Immergas Technical Services Centre).
Fumes thermostat block. This occurs if the fumes evacuation pipe does
not function correctly. The boiler goes into stand-by for 30 minutes, after
which, if normal working conditions are restored, it re-starts without having
to be reset. If this phenomenon occurs frequently, call a qualified technician
(e.g. Immergas Technical Services Centre).
Contacts resistance block. This occurs in the case of faults to the safety
thermostat over-temperature). The boiler does not start and a technician
must be called (e.g. Immergas After-Sales Service).
Parasite flame block. This occurs in case of a leak on the detection circuit
or anomaly in the flame control unit. The boiler does not start. A qualified
technician must be called (e.g. Immergas After-Sales Service).
Loss of remote control communication. This occurs if an incompatible
remote control is connected, or if communication between the boiler and
the RFC or DRC is lost. Try the connection procedure again by turning
the boiler off and turning the selector switch (9) to position (
). If the RFC is still not detected on re-starting the boiler will switch
to local operating mode, i.e. using the controls on the boiler itself. If
this phenomenon occurs frequently, contact a qualified technician for
assistance (e.g. Immergas Technical Services Centre).
Signalling and diagnostics - Display on Remote Friend Control screen
(optional). During normal boiler operation the room temperature value is
displayed on the Remote Friend Control (RFC or DRC) screen; in case of
malfunction or anomaly, the temperature value is replaced by the relative
error code given in the table page 77.
Important: if the boiler is set in stand-by "
error symbol will appear on the RFC and error code "31E" on the DRC.
The remote controls are powered constantly so as not to loose the memo-
rised programs.
2.7
Boiler shutdown.
Disconnect the main selector switch (9) taking it to position "
from 1 to 8 off), disconnect the external omni-polar switch to 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
Restoring heating system pressure.
Periodically check the system water pressure. The boiler pressure gauge
should read between 1 and 1.2 bar.
If the pressure falls below 1 bar (with the circuit cool) restore normal pressure
via the valve located at the bottom of the boiler (see figure).
N.B.: close the valve afterwards.
If pressure values reach around 3 bar the safety valve may trip.
In this case contact a professional technician for assistance.
In the event of frequent pressure drops, contact qualified personnel for
assistance to eliminate system leakage.
78
2.9
To drain the boiler, use the special drain cock (see figure above and on
page 75).
Before draining, ensure that the filling valve is closed.
2.10 Antifreeze protection.
The boiler is supplied as standard with an anti-freeze function that turns
on the pump and burner when system water temperature in the boiler falls
below 4°C and shuts down once the temperature exceeds 42°C. The anti-
freeze function is guaranteed if the boiler is fully operative and not in "block"
status, and is receiving electrical power. To avoid continued operation in
the event of prolonged absence, the system must be drained completely or
anti-freeze substances should be added to the heating system water. In both
cases the boiler hot water water circuit must be drained. In appliances subject
to frequent draining, the system must be refilled with suitably treated water
to eliminate hardness that may cause limescale formation.
2.11 Casing cleaning.
Use damp cloths and neutral detergent to clean the boiler casing. Never use
abrasive or powder detergents.
2.12 Decommissioning.
In case of permanent boiler shutdown, contact professional personnel for
the relative procedures and make sure the electrical, water and gas supply
lines are disconnected.
" the "CON" connection
" (LEDs
BOTTOM VIEW
DOMESTIC WATER
GAS COCK
INLET COCK
Draining the system.
SYSTEM DRAIN COCK
SYSTEM FILLING
VALVE

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