Immergas MINI NIKE 3 E - Page 30

28
STMiN3E ed 09/11 MINI NIKE 3 E
Technical DocumentationTechnical Documentation
P.C.B. safety functions
e P.C.B. carries out a periodical self-check to control its correct functioning. During
functioning in heating mode or with boiler in stand-by, the function activates every 18
hours after the last boiler check/power supply.
When operating in domestic hot water mode the self-check starts within 10 minutes after
the end of the ow in progress, for a duration of approx. 10 seconds.
N.B.: during self-check, the boiler remains o, including signalling.
Periodical self-check
After 24 hours from the last activation, independently from the functioning status of the
boiler (Summer or Winter), the pump (M1) is started for a time of 60 seconds and the
three-way valve (M30) is started for a period of 10 seconds.
ree-way valve/anti-
block pump
In the case of: anomaly on the gas valve pilot circuit; no electric connection to the gas valve
(interrupted gas valve coils); error inside the integrated P.C.B.
Generic boiler P.C.B.
anomaly
In the case of dispersion of the detection circuit or anomaly in the ame control that
generates a correct ionisation current (without the gas valve being open) with the duration
of at least 20 seconds, boiler functioning is blocked.
To re-start the appliance, press the “Reset” button and then make a central heating or
domestic hot water request.
Parasite ame block
If the contact of the water overheating safety thermostat is opened (temperature of the primary
circuit exceeding 100 °C), boiler functioning is blocked.
To re-start the appliance, press the “Reset” button and then make a central heating or
domestic hot water request.
ermostat safety
block
To prevent overheating of the water-gas heat exchanger if the pump is blocked or due to
little circulation in the primary circuit, when the CH NTC ow probe (B1) detects an
increase in the temperature exceeding 5 °C per second (for more than 2 consecutive seconds),
the burner is switched o.
Re-start takes place when the ow temperature falls below 43°C.
Insucient circulation
If within 10 seconds from the start of the ignition cycle, the detection electrode (E2) has
not detected ame presence on the burner, boiler functioning is blocked.
e integrated P.C.B. makes 2 ignition attempts with duration of 10 seconds, intervalled
by a time of 30 seconds, after which it blocks.
To re-start the appliance, press the “Reset” button and then make a central heating or
domestic hot water request.
N.B.: it is possible to reset the anomaly up to 5 consecutive times, after which the function
is disabled for at least one hour and one attempt is allowed after every hour; or 5 attempts
can be gained by shutting o the power supply to the circuit.
No ignition
block
If the ue safety thermostat contact is opened (little ue draught) boiler functioning is
blocked for 30 minutes.
If normal conditions are restored the boiler restarts without having to be reset.
To re-start the appliance before the end of this timing (30 minutes) the power supply must
be removed from the boiler by temporarily disconnecting the electric power supply plug.
If the ue safety thermostat should intervene three times in less than two hours, boiler
functioning is blocked.
To re-start the appliance, press the "Reset" button.
Flue safety thermostat
block
(E6)