Fault
Fault
Possible cause
code
Sensor damaged
F10
Delivery sensor 1 fault
Wiring shorted
Wiring disconnected
Sensor damaged
F11
DHW sensor fault
Wiring shorted
Wiring disconnected
Sensor damaged
F14
Delivery sensor 2 fault
Wiring shorted
Wiring disconnected
Wiring disconnected
A16
Gas valve fault
Faulty gas valve
Fan fault
Faulty baffle
F20
Combustion control fault
Flue obstructed or not correctly
sized
Fault F20 generated 6 times in the
A21
Poor combustion fault
last 10 minutes
A23
Card parameter fault
Wrong card parameter setting
A24
Card parameter fault
Wrong card parameter setting
F34
Supply voltage under 180V. Electric mains trouble
F35
Faulty mains frequency
Electric mains trouble
Pressure too low
Incorrect system water
F37
Water pressure switch damaged
pressure
or not connected
Probe damaged or wiring shorted
F39
External probe fault
Probe disconnected after activat-
ing the sliding temperature
Delivery sensor or DHW sensor
A41
Sensor positioning
detached from the pipe
F42
Heating sensor fault
Sensor damaged
No system H
Exchanger protection acti-
F43
vation.
Air in the system
Modulating Operator wiring dis-
connected
F50
Gas valve fault
Faulty gas valve
A51
Poor combustion fault
Inlet/exhaust flue obstruction
28
EN
Cure
Check the wiring or replace the sen-
sor
Check the wiring or replace the sen-
sor
Check the wiring or replace the sen-
sor
Check the wiring
Check the gas valve and replace it if
necessary
Check the fan and fan wiring
Check the baffle and replace it if nec-
essary
Check the flue
See fault F20
Check the card parameter and modify
it if necessary
Check the card parameter and modify
it if necessary
Check the electrical system
Check the electrical system
Fill the system
Check the sensor
Check the wiring or replace the sen-
sor
Reconnect the external probe or disa-
ble the sliding temperature
Check the correct positioning and
operation of the sensors
Replace the sensor
O circulation
Check the circulating pump
2
Vent the system
Check the wiring
Check the gas valve and replace it if
necessary
Check the flue
cod. 3541A220 - 01/2011 (Rev. 00)
5. TECHNICAL DATA AND CHARACTERISTICS
Table. 9 - Key of figures cap. 5
5 Sealed chamber
7 Gas inlet
8 Domestic hot water outlet
9 Cold water inlet
10 System delivery
11 System return
14 Safety valve
16 Fan
19 Combustion chamber
20 Burner assembly
21 Main nozzle
22 Burner
26 Combustion chamber insulation
27 Copper exchanger for heating and hot
water
28 Fume manifold
5.1 General view and main components
187
5
16
278
81
20
21
22
42
10
8
44
fig. 18 - General view TAURA D 24 MCS
TAURA D MCS
29 Fume outlet manifold
32 Heating circulating pump
36 Automatic air vent
38 Flowswitch
42 DHW temperature sensor
44 Gas valve
56 Expansion tank
72 Room thermostat (not supplied)
74 System filling cock
81 Ignition and detection electrode
114 Water pressure switch
138 External probe
139 Room unit
187 Fume baffle
278 Double sensor (Safety + Heating)
29
7
38 9
74
11
32
56
28
27
19
26
14
36
114