Gruppo Imar IVY 24 MR/MN, Installation & Use Manual, Page: 13 / 44

11
FAULT CODES TABLE (ALL MODELS)
Code Possible cause Behaviour Possible actions
E1
Ignition failed Boiler locked
Check gas presence
Check gas line pressure
Check ignition/detection
electrodes
Check electronic cable
Check igniter
E2 Air pressure switch failure Boiler locked
Check flue draught / flue
pipes
Check fan
E3
Heating system temperature
sensor fault
Boiler locked Replace CH sensor
E4
Domestic hot water system
temperature sensor fault
DHW supplied in provisional
mode
Heating functions normally
Replace CH sensor
E5
Gas regulation valve fault Boiler locked
Check wire connection to
modulator
Replace gas valve
E6
High temperature detected
by heating system sensor
Device in stand-by
Normal DHW supply
Wait for automatic unlocking
E8
Central heating system
pressure too low
Boiler locked Check pressure to CH system
E9
Central heating system
water temperature too high
Boiler locked
Degas CH system
Check CH system pressure
Check CH system circulation
Check combustion
adjustmen
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 trasmitter
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
E23*
Fault on external
temperature sensor
Resumption of operation
without external sensor
Check position of external
probe
Check communication line
Replace external sensor
E28
Water cylinder / water
heater probe failure
Boiler locked Replace probe
E70
Supply voltage too low Boiler locked
Controlling the supply of the
boiler
E77
System error Boiler locked
Reset system
Switch off power
Replace electronic board
E99
Parameter
configuration error
Boiler locked
Check and reconfigure the
parameters
*Can be displayed only if the relative devices are installed