Gas Conversion; Troubleshooting - Baxi LUNA DUO-TEC IN+ Instruction Manual For Users And Fitters

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.

TROUBLESHOOTING

If a fault occurs, the display shows the
The fault is identified by an error code followed by E letter and is not resettable.
Call an authorized 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
154
Delivery/return probe control test
160
Fan fault
Intervention of safety thermostat for excess temperature in
178
low temperature system
270
Overheating exchanger
317 162
Call the Authorised Service Centre.
321 163
Call the Authorised Service Centre.
384 164
Parasite flame (internal error)
385 165
Input voltage too low
431
Exchanger sensor faulty
symbols flashing together with the <ERROR> writing.
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. If the fault persists, call the authorised 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
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.
Press and hold down
Automatic reset at voltages in excess of 175V. If this fault
persists, call the Authorised Service Centre.
Call the Authorised Service Centre.
11
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.
for at least 2 seconds.
for at least 2 seconds.
7689490.01 (1-09/17)