Prolonged Shutdown. Anti-Freeze Protection; Gas Conversion; Faults; Boiler Information Menu - Baxi LUNA DUO-TEC MP 1.90 Manual De Uso

2. PROLONGED SHUTDOWN. ANTI-FREEZE PROTECTION

Do not drain the whole system as filling up with water again could cause unnecessary and harmful scale to build up inside the
boiler and the heating elements. If the boiler is not used during winter and is therefore exposed to the danger of frost, add some
specific anti-freeze to the water in the system (e.g.: propylene glycol coupled with corrosion and scale inhibitors). The electronic
boiler management system includes a "frost protection" function for the heating system which, when delivery temperature falls
below 5°C, lights the burner until a delivery temperature of 30°C is reached.
The function is operative if: the boiler is electrically powered, there is gas, system pressure is normal and the boiler is not
blocked.

3. GAS CONVERSION

The boilers can operate both on natural gas (G20) and LPG (G31) . All gas conversions must be made by the AUTHORISED
TECHNICAL SERVICE CENTRE.

4. FAULTS

The faults shown on the display are identified with the symbol
plete list of faults, see the following table.
If appears on the display the fault must be RESET by the user.
To RESET the boiler, press
Description of fault
10
External probe sensor faulty
20
NTC flow sensor faulty
28
NTC fumes sensor faulty
40
NTC return sensor faulty
NTC domestic hot water sensor faulty
50
(only for heating-only model with storage boiler)
Communication problem between boiler board and
83
control unit. Probable short circuit on wiring.
84
Address conflict between control units
109
Air in boiler circuit (temporary fault)
Safety thermostat tripped due to overtemperature.
110
(pump probably blocked or air in heating circuit)
111
Safety thermostat tripped due to overtemperature.
117
Pressure in hydraulic circuit too high
118
Pressure in hydraulic circuit too low
In the event of a fault, the display backlighting indicates the error code. 5 reset attempts can be performed after which the
boiler shuts down. Wait 15 minutes before attempting to reset the boiler again.

5. BOILER INFORMATION MENU

Press to display the information indicated in the following table. Press
Description
00
Secondary fault internal code
01
Heating flow temperature
02
External temperature (if the external sensor is fitted)
03
External storage boiler temperature (fitted models)
04
Storage boiler temperature (fitted models)
05
Water pressure in heating system
06
Heating return temperature
07
Fumes sensor temperature
08
not used
7104645.02 (1-01/12)
. If faults are displayed frequently, call the Authorised Service Centre.
and a number (fault code). For a com-
Description of fault
No circulation safety trip
125
(control performed via a temperature sensor)
128
No flame
130
Fumes NTC tripped due to overtemperature
133
Ignition failure (4 attempts)
151
Boiler board internal fault
160
Fan fault
321
NTC domestic hot water sensor faulty
384
Parasite flame (internal error)
385
Input voltage too low
386
Fan speed threshold not reached
No circulation safety trip
430
(control performed via pressure sensor)
to exit.
Description
10
Zone 1 heating flow temperature
11
Zone 2 heating flow temperature
12
Zone 1 heating mode
13
Zone 2 heating mode
14
DHW circuit operating mode
15
Boiler operating mode
16
Solar plant operating mode
17
Manufacturer information
18
Manufacturer information
24