VENUS BA MS 24- 34
27
EN
cod. 3541I710 - Rev. 00 - 06/2016
4.4 Troubleshooting
Diagnostics
In case of operation faults or problems, the display flashes and the fault identification
code appears.
There are faults that cause permanent shutdown (marked with the letter “
A
”): to restore
operation just press the
reset
button (detail 6 - fig. 1) for 1 second or RESET on the op-
tional remote timer control if installed; if the boiler fails to start, it is necessary to firstly
eliminate the fault.
Faults marked with the letter “
F
” cause temporary shutdowns that are automatically reset
as soon as the value returns within the boiler's normal working range.
Table of faults
Table. 10 - List of faults
5. TECHNICAL DATA AND CHARACTERISTICS
Table. 11 - Legend - figures cap. 5
Fault code Fault
Possible cause
Cure
A01
No burner ignition
No gas
Check the regular gas flow to the
boiler and that the air has been
eliminated from the pipes
Ignition/detection electrode fault
Check the wiring of the electrode and
that it is correctly positioned and free
of any deposits
Faulty gas valve
Check the gas valve and replace it if
necessary
Insufficient gas supply pressure
Check the gas supply pressure
Trap blocked
Check the trap and clean it if necessary
A02
Flame present signal
with burner off
Electrode fault
Check the ionization electrode wiring
Card fault
Check the card
A03
Overtemperature
protection intervention
Heating sensor damaged
Check the correct positioning and
operation of the heating sensor
No water circulation in the system Check the circulating pump
Air in the system
Vent the system
A04
Fume extraction duct
safety device
intervention
Fault F07 generated 3 times in the
last 24 hours
See fault F07
A05
Fan protection activated
Fault F15 generated for 1 hour
(consecutive)
See fault F15
A06
No flame after ignition
stage (6 times in
4 minutes)
Ionization electrode fault
Check the position of the ionization
electrode and replace it if necessary
Flame unstable
Check the burner
Gas valve Offset fault
Check the Offset adjustment at
minimum power
air/fume ducts obstructed
Remove the obstruction from the flue,
fume extraction ducts and air inlet
and terminals
Trap blocked
Check the trap and clean it if
necessary
F07
High fume temperature
The fume probe detects an
excessive temperature
Check the exchanger
F10
Delivery sensor 1 fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F11
Return sensor fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F12
DHW sensor fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F13
Fume probe fault
Probe damaged
Check the wiring or replace the fume
probe
Wiring shorted
Wiring disconnected
F14
Delivery sensor 2 fault
Sensor damaged
Check the wiring or replace the sen-
sor
Wiring shorted
Wiring disconnected
F15
Fan fault
No 230V power supply
Check the 3-pin connector wiring
Tachometric signal interrupted
Check the 4-pin connector wiring
Fan damaged
Check the fan
F34
Supply voltage under
170V
Electric mains trouble
Check the electrical system
F35
Faulty mains frequency Electric mains trouble
Check the electrical system
F37
Incorrect system water
pressure
Pressure too low
Fill the system
Water pressure switch damaged
or not connected
Check the sensor
F39
External probe fault
Probe damaged or wiring shorted Check the wiring or replace the sensor
Probe disconnected after
activating the sliding temperature
Reconnect the external probe or
disable the sliding temperature
A41
A44
Sensor positioning
Heating sensor detached from
pipe
Check the correct positioning and
operation of the heating sensor
A42
Heating sensor fault
Sensor damaged
Replace the sensor
F43
Exchanger protection
intervention.
No system H
2
O circulation
Check the circulating pump
Air in the system
Vent the system
F52
Heating sensor fault
Sensor damaged
Replace the sensor
A61
Controller fault
ABM03D
Controller internal error
ABM03D
Check the ground connection and
replace the controller if necessary.
A62
No communication
between controller and
gas valve
Controller not connected
Connect the controller to the gas
valve
Valve damaged
Replace the valve
A63
F64
A65
F66
Controller fault
ABM03D
Controller internal error
ABM03D
Check the ground connection and
replace the controller if necessary.
A23
A24
F20
F21
A26
F40
F47
Card parameter fault
Wrong card parameter setting
Check the card parameter and
modify it if necessary.
7
Gas inlet - Ø 1/2”
104
Fuse
8
DHW outlet - Ø 1/2”
114
Water pressure switch
9
DHW inlet - Ø 1/2”
136
Flow meter
10
System delivery - Ø 3/4”
138
External probe (optional)
11
System return - Ø 3/4”
139
Remote timer control (optional)
14
Pressure relief valve
169
Noise filter
16
Fan
186
Return sensor
32
Heating circulating pump
191
Fume temperature sensor
36
Automatic air vent
193
Trap
37
Cold water inlet filter
194
DHW exchanger
39
Flow regulator
196
Condensate tray
42
DHW temperature probe
241
Automatic bypass
44
Gas valve
256
Modulating heating circulating pump signal
56
Expansion tank
278
Double sensor ( Heating)
72
Room thermostat (not supplied)
350
Fan/Burner assembly
74
System filling valve
A
ON/OFF switch (configurable)
81
Ionization/ignition electrode
95
Diverter valve
Fault code Fault
Possible cause
Cure