ERA F 23 - 32 - 45 - 56
11
EN
3.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In case of a boiler fault,
the display will flash together with the fault symbol (detail 11 - fig. 1) indicating the fault
code.
There are faults that cause permanent shutdowns (marked with the letter “
A
”): to restore
operation, press the RESET button (detail 6 - fig. 1) for 1 second or use the RESET on
the optional remote timer control if installed; if the boiler fails to start, it is necessary to
eliminate the fault indicated by the operation LEDs.
Other 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.
Fault table
Table. 2 - Fault list
4. TECHNICAL DATA AND CHARACTERISTICS
4.1 Dimensions and connections
fig. 22 - Dimensions and connections
Fault
code
Fault
Possible cause
Cure
A01
The burner fails to light
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
Ignition power too low
Adjust the ignition power
A02
Flame present signal with
burner off
Electrode fault
Check the ionisation electrode wiring
Card fault
Check the card
A03
Overtemperature protection
activation
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
F04
Fume thermostat activation
(after activation of the fume
thermostat, boiler operation
is inhibited for 20 minutes)
Fume thermostat contact open Check the thermostat
Wiring disconnected
Check the wiring
Flue not correctly sized or
obstructed
Replace the flue
A06
No flame after the ignition
phase
Low pressure in the gas system Check the gas pressure
Burner minimum pressure set-
ting
Check the pressures
F10
Delivery sensor 1 fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F11
DHW sensor fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F14
Delivery sensor 2 fault
Sensor damaged
Check the wiring or replace the sensor
Wiring shorted
Wiring disconnected
F34
Supply voltage under 170V. Power mains trouble
Check the electrical system
F35
Mains frequency anomaly
Power mains trouble
Check the electrical system
F37
Incorrect system water
pressure
Pressure too low
Fill the system
Water pressure switch not
connected or damaged
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
Sensor positioning
Delivery sensor disconnected
from the pipe
Check the correct positioning and operation of
the heating sensor
F42
Heating sensor fault
Sensor damaged
Replace the sensor
F50
Modureg fault
Wiring disconnected
Check the wiring
Type and model
A
B
C
D
E
F
G
A1
Heating
delivery
A2
Heating
return
A3
Gas
inlet
ERA F 23
450
137
134
65
480
130
70
1” 1/2
1” 1/2
1/2”
ERA F 32
450
94
91
22
530
150
80
ERA F 45
600
126
123
86
480
150
80
ERA F 56
600
83
80
40
480
180
95
cod. 3540L893 - Rev. 01 - 03/2018
