Prolonged Shutdown. Anti-Freeze Protection; Gas Conversion; Faults - Baxi DUO-TEC Instruction Manual For Users And Fitters

2. PROLONGED SHUTDOWN. ANTI-FREEZE PROTECTION

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

If appears on the display the fault must be RESET by the user.
Authorised Service Centre.
Description of fault
10 External probe sensor faulty
12
13
15 Gas valve control error
18
19
20
28 NTC fumes sensor faulty
40 NTC return sensor faulty
50
53
Fumes outlet obstructed
55
Electronic board not calibrated
83...87
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
No circulation safety trip
125
(control performed via a temperature sensor)
128
129
130 Fumes NTC tripped due to overtemperature
133 Ignition failure (5 attempts)
134
Gas valve blocked
Internal board error
135
Gas valve connection error
154
7733595 (01-05/19)
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.
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Call the Authorised Service Centre.
technical service centre
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.
FILLING THE SYSTEM section.
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Call the Authorised Service Centre.
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.