11
*visible only if the relevant devices are present
FAULT CODES TABLE
Code
Possible cause
Behaviour
Possible actions
E01
Ignition failed
Boiler locked
Check gas presence Check gas
line pressure Check ignition/
detection electrodes
Check electronic cable
Check igniter
E03
Heating system temperature
sensor fault
Boiler locked
Replace DHW sensor
E04
Domestic hot water system
temperature sensor fault
DHW supplied in provisional mode
Heating functions
Replace CH sensor
E06
High temperature detected by
heating system sensor
Device in stand-by
Normal DHW supply
Wait for automatic unlocking
Check pressure to CH system
E08
Central heating system pressure
too low
Boiler locked
Check pressure to CH system
E09
Over-temperature safety probe
intervention
Boiler locked
Perform reset maneuver
Contact technical support
E10
Central heating system
pressure too HIGH (> 2.7 bar)
Boiler locked
Check pump functioning
E11
Pressure transmitter failure
Boiler locked
Check integrity of
connection
Replace pressure transmitter
E12
Remote control reset used-up
Boiler locked
Reset system
Switch off power
E13
SYSTEM error
Boiler locked
Reset system
Switch off power
Replace electronic board
E17
Exhaust probe damaged or
Exhaust overtemperature
Boiler locked
Reset the system or replace the
probe
E23*
Fault on external temperature
sensor
Resumption of operation without
external sensor
Check position of external
probe
Check communication line
Replace external sensor
E24
Return probe damaged
The boiler continues to operate
with circulator always at
maximum power
Replace the probe
E25
Central heating system
temperature too low freezing risk
Boiler locked
If possible reset normal functioning
conditions
E28*
Water cylinder / water heater
probe failure
Boiler locked
Replace probe
E30
Fan fault feedback
Boiler locked
Check fan connections
Replace fan
E31
Faulty safety probe
Boiler locked
Replace the probe
E60
Circulator PWM error
Circulator always at maximum
power
Check wiring
Replace the circulator
E61
Temporary circulator failure
The circulator works in emergency
mode
Wait for normal conditions to be
restored or replace the circulator
E62
Circulator failure
Boiler locked
Replace circulator
E75
Failure communication between
electronic board and display
board
Boiler locked
Reset system
Switch off power
Replace electronic board
E88
Failure OPEN THERM
COMMUNICATION
Boiler locked
Check connection between
boiler and Open Therm
E99
Parameter
configuration error
Boiler locked
Check and reconfigure the
parameters
