Immergas 3.018921, Instruction And Warning Booklet

11

INS

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2.5  IGNITION OF THE BOILER.

Before ignition make sure the central heating 

system is filled with water and that the pressure 

gauge (12) indicates a pressure of 1 - 1.2 bar;

- Open the gas cock upstream from the boiler.
-  Turn the main selector switch (9) to Domestic 

Hot Water/Comando Amico Remoto

V2

(CAR

V2

) (

) or Domestic Hot Water 

and Central heating(

).

N.B.: 

Once the main selector switch has been 

placed (9) on one of these positions, the presence 

of voltage is indicated by the switch-on with a 

fixed light of one of the LEDS from 4 to 8, which 

indicate the temperature of the output water from 

the main heat exchanger.

Attention:

 if any one of the LEDs 4 to 8 starts 

flashing, this means that there is a fault. Refer to 

the next paragraph.
Functioning of the boiler in domestic water mode 

and in heating mode is indicated respectively by 

the switch-on of LED 2 or LED 3 with a fixed light 

(in absence of remote controls).
• Operation with Remote Control (Optional). 

With selector switch (9) in position (

) and Remote Control connected to the boiler 

selector switches (10) and (11) excluded. The 

boiler adjustment parameters are set from the 

control panel of the Remote Friend Control. 

Connection to the Remote Control is indicated 

by the contemporary fixed switch-on of LEDs 

2 and 3 (

). Also in the presence 

of Remote Control the indications of the 

temperature and any faults are maintained on 

the control panel.

• 

Operation without Remote Control. With 

the selector switch (9) in position (

) 

the heating adjustment selector switch (11) is 

cut out, the domestic hot water temperature 

is regulated by selector switch (10). With 

the selector switch in position (

) the 

heating adjustment selector switch (11) is used 

to regulate the temperature of radiators, while 

selector (10) continues to be used for domestic 

hot water. Turn the selector switches clockwise 

to increase the temperature and anti-clockwise 

to decrease it.

From this moment the boiler functions 

automatically. With no demand for heat (heating 

or domestic hot water production) the boiler 

goes to “standby” function, equivalent to the 

boiler being powered without presence of 

flame (LED corresponding to the ignited boiler 

temperature). Each time the boiler lights up, the 

relative flame present symbol is displayed by the 

green LED 1 ( ).

N.B.:

 The boiler may start-up automatically if the 

anti-freeze function is activated.

2.6 TROUBLESHOOTING.

The Nike Mini 28 kW Special boiler signals an 

anomaly by flashing of one of the LEDs from 4 

to 8 or LEDs 1 and 2 coupled to LED 7. The error 

code will be displayed on any remote control by 

a numerical code preceded or followed by the 

letter E (e.g. CAR

V2

 = Exx).

Anomaly signalled

LED 

flashing

Remote display

Insufficient circulation

LED 4 (

)

27

Flow probe anomaly

LED 5 (

)

05

No ignition block

LED 6 (

)

01

Safety thermostat block (over-

temperature)

LED 7 (

)

02

Flue safety thermostat block

LED 8 (

)

03

Contacts resistance block

LEDs 2 (

) and 7 (

) flash at the 

same time

04

Parasite flame block

LEDs 1 (

) and 7 (

) flash at the 

same time

20

Loss of remote control 

communication

LEDs 2 and 3 flash alternately 

(

)

31

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: 
- 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.
If this phenomenon occurs frequently, contact 

a qualified technician for assistance (e.g. After-

Sales Technical Assistance Service).

Delivery probe anomaly.

 If the board detects an 

anomaly on the system NTC flow probe (code 

05) the boiler will not start; contact a qualified 

technician for assistance (e.g. After-Sales 

Technical Assistance Service).

Ignition block.

 The boiler lights up with 

each demand for room heating or hot water 

production. If the burner does not ignite within 

10 seconds, the boiler remains in stand-by 

for 30 seconds, tries again and if the second 

attempt fails it goes into “ignition block” (LED 

6 flashing). To eliminate “ignition block” the 

main selector (9) must be temporarily turned 

to the Reset position. The anomaly can be reset 

5 consecutive times, after which the function is 

inhibited for at least one hour. It is possible to try 

once 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 appliance downtime, it may 

be necessary to eliminate the “ignition block”. 

If this phenomenon occurs frequently, contact 

a qualified technician for assistance (e.g. After-

Sales Technical Assistance Service).

Safety thermostat block (overheating).

 During 

operation, if a fault causes excessive overheating 

internally, in the exhaust, or an anomaly occurs 

in the flame control section, an overheating 

block is triggered in the boiler (LED 7 flashing). 

To eliminate the “overheating block” the main 

selector (9) must be temporarily turned to the 

Reset position. If this phenomenon occurs 

frequently, contact a qualified technician for 

assistance (e.g. After-Sales Technical Assistance 

Service).

Flue safety 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. In the case of 3 consecutive 

blocks, the boiler itself blocks and it must be reset 

in order to re-start. It is nevertheless necessary 

to call a qualified technician (e.g. After-Sales 

Technical Assistance Service) in order to solve 

the problem.

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. 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 and 

a technician must be called (e.g. After-Sales 

Service).