Immergas MINI NIKE X 24 3 E, Instructions Manual

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2.4  USING THE BOILER.

Important:

 the Mini Eolo X 24 3 E boiler has 

been designed to operate as an appliance for 

room central heating only or, coupled to a specific 

optional kit, for central heating and the produc-

tion of DHW. For this reason the boiler control 

panel has a button to adjust the temperature of 

DHW, but its operation is only activated by the 

optional kits that also enable the production of 

DHW. Without the coupling of these specific kits, 

the functioning of this button and all functions 

referring to the DHW are inhibited.
Before ignition make sure the heating system 

is filled with water and that the manometer (7) 

indicates a pressure of 1 ÷ 1.2 bar.

- Open the gas cock upstream from the boiler.
- Press the button (2) until the display switches 

on, after which press the button in sequence 

(2) and take the boiler to the summer (

) 

or winter (

) position.

• 

Summer 

(

)

: 

in this mode the boiler 

functions only to produce the DHW 

(when the 

boiler is connected to an external cylinder)

, the 

temperature is set via the buttons (3-4) and the 

relative temperature is shown on the display via 

the indicator (16).

• Winter 

(

)

:

 in this mode the boiler functions 

both for producing domestic hot water 

(when 

the boiler is connected to an external cylinder)

and heating the environment. The temperature 

of the DHW is always regulated via buttons 

(3-4), the heating temperature is regulated via 

buttons (5-6) and the relative temperature is 

shown on the display via the indicator (16).

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. 

Each time the burner ignites, the relative flame 

present symbol is displayed (10) with relative 

output scale.

• 

Operation with Comando Amico Remoto

V2

(CAR

V2

) (Optional)

. If the CAR

V2

 is connected, 

the (

) symbol will appear on the display. 

The boiler regulation parameters can be set 

via the CAR

V2

 control panel and the reset 

button (1) remains active on the boiler control 

panel, along with the switch-off button (2) 

(“off” mode only) and the display where the 

functioning state is shown.

Attention:

 if the boiler is put into "off" mode, 

the “ERR>CM” connection error symbol 

will appear on the CARCAR

V2

. The CAR

V2

 is 

however powered constantly so as not to loose 

memorised programs.

• 

Operation with optional external probe 

(

)

.

 In the case of a system with optional 

external probe, the boiler flow temperature 

for room central heating is managed by the 

external probe depending on the external 

temperature measured (Par. 1.6). The flow 

temperature can be modified by selecting 

the functioning curve via buttons (5 and 6), 

selecting a value from "0 to 9" (Fig. 1-6).

  With external probe present, the relative 

symbol (12) will appear on the display. In the 

central heating phase, if the temperature of the 

water contained in the system is sufficient to 

heat the radiators, the boiler can only function 

with the activation of the pump.

• 

“Stand-by” mode.

 Press button (2) in 

succession until the (

) symbol appears. 

The boiler remains active from this moment 

and the anti-freeze function, pump anti-block 

function and 3-way and signalling of any 

anomalies is guaranteed.

N.B.:

 in these conditions the boiler is 

considered still powered.

• 

“Off” mode.

 By holding the button (2) down 

for 8 seconds, the display switches-off and the 

boiler is off completely. The safety functions are 

not guaranteed in this mode.

N.B.:

 in these conditions the boiler is considered 

still live even if there are no functions active.

• 

Display functioning.

 The display lights up 

during the use of the control panel, after 15 

seconds inactivity, the brightness drops until 

just the active symbols are displayed. The 

lighting mode can be varied via parameter P2 

in the circuit board customisation menu.

2.5  FAULT AND ANOMALY SIGNALS.

The boiler signals out anomalies by flashing on 

the display and relative error codes, listed on the 

table, are displayed.

Anomaly signalled

code

displayed

(flashing)

No ignition block

01

Safety thermostat block 

(overheating), flame control 

anomaly

02

Fan anomaly

03

Generic boiler P.C.B. anomaly

04

Flow probe anomaly

05

Maximum N° of reset

08

Insufficient system pressure

10

Flue pressure switch failure

11

Storage tank probe anomaly

12

Configuration error

15

Parasite flame

20

Push button control panel 

anomaly

24

Insufficient circulation

27

Loss of remote control 

communication.

31

Low power supply voltage

37

Loss of flame signal

38

Block due to loss of 

continuous flame signal

43

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.

Ignition block.

 The boiler ignites automatically 

with each demand for room heating or hot 

water production. If this does not occur within 

10 seconds, the boiler goes into ignition block 

(code 01). To eliminate “ignition block” the Reset 

button (1) must be pressed. On commissioning 

or after extended downtime, 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 Technical Assistance Service).

Overheating thermostat block.

 During normal 

functioning, if a fault causes excessive overheating 

internally, the boiler goes into overheating block 

(code 02). After allowing to cool, eliminate the 

"overtemperature block" by pressing the Reset 

key (1). If this phenomenon occurs frequently, 

contact a qualified technician for assistance 

(e.g. Immergas After-Sales Technical Assistance 

Service).

Fan anomaly.

 This occurs if the fan is blocked 

or if the intake or drain pipes are obstructed. If 

normal conditions are restored the boiler restarts 

without having to be reset. If this anomaly 

persists, contact a qualified technician for 

assistance (e.g. Immergas After-Sales Service).

Generic boiler P.C.B. anomaly.

 This happens 

when a signal is incorrectly recognised by 

the boiler P.C.B. microprocessor (code 04). 

To eliminate “boiler P.C.B. generic anomaly 

block” the Reset button (1) must be pressed. If 

this phenomenon occurs frequently, contact a 

qualified technician for assistance (e.g. Immergas 

After-Sales Technical Assistance Service).

Delivery probe anomaly.

 If the board detects 

an anomaly on the delivery probe (code 05), 

the boiler will not start; contact a qualified 

technician for assistance (e.g. Immergas After-

Sales Technical Assistance Service).

Maximum N° of reset.

 Number of allowed resets 

that have already been used. 

Insufficient system pressure. 

Water pressure 

inside the heating system (code 10), sufficient to 

guarantee the correct functioning of the boiler, 

is not detected. Check that the system pressure 

is between 1÷1.2 bar.

Flue gas pressure switch failure.

 It occurs in 

the case of an error on the circuit board that 

gives consent for fan start-up incorrectly or 

in the case of flue-gas pressure switch fault 

(code 11). If normal conditions are restored the 

boiler restarts without having to be reset. If this 

anomaly persists, contact a qualified technician 

for assistance (e.g. Immergas After-Sales Service).

Storage tank probe anomaly. 

If the board detects 

an anomaly a the storage tank probe (code 12), 

the boiler cannot produce domestic hot water. 

A qualified technician must be called (e.g. Im-

mergas After-Sales Service).