Prolonged Shutdown. Anti-Freeze Protection; Gas Conversion; Faults - Baxi LUNA DUO-TEC+ 1.12 GA Gebrauchsanleitung

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
complete 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 and hold down
Authorised Service Centre.
Description of fault
09
Gas valve connection error
10
External probe sensor faulty
12
Hydraulic differential pressure switch switching failure
13
Hydraulic differential pressure switch contacts stuck
15
Gas valve control error
18
Hydraulic circuit automatic filling in progress
19
Fault in system filling phase
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)
53
Fumes outlet obstructed
55
Electronic board not calibrated
Communication problem between boiler board and control
83...87
unit. Probable short circuit on wiring.
Fumes fault during calibration (probable fumes
92
recirculation)
Air in boiler circuit
109
(temporary fault)
Safety thermostat tripped due to overtemperature (pump
110
probably blocked or air in heating circuit).
117
Pressure in hydraulic circuit too high (> 2,7 bar)
118
Pressure in hydraulic circuit too low
No circulation safety trip
125
(control performed via a temperature sensor)
128
No flame
129
Loss of flame at ignition
130
Fumes NTC tripped due to overtemperature
133
Ignition failure (5 attempts)
134
Gas valve blocked
135
Internal board error
7219620.01 (1-04/15)
and a number (fault code). For a
for 2 seconds. If faults are displayed frequently, call the
Action
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Wait for the end of the filling cycle
Press and hold down
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Disconnect the boiler from the mains power supply
for a few seconds.
technical service centre
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Press and hold down
Call the Authorised Service Centre.
Check that the pressure in the system is correct; See the
FILLING THE SYSTEM section.
Press and hold down
Press and hold down
Call the Authorised Service Centre.
Press and hold down
Press and hold down
Press and hold down
Press and hold down
28
for at least 2 seconds.
If the fault persists, call the authorised
for at least 2 seconds.
for at least 2 seconds.
for at least 2 seconds.
for at least 2 seconds.
for at least 2 seconds.
for at least 2 seconds.
for at least 2 seconds.