Display items Meaning
Failed ignition Error 1
The flame has not been ignited within the appliance safety interval,
3 times consecutively
False flame Error 2 False flame detection
High Boiler Temperature Error 3
The appliance safety thermostat has tripped due to high temperature
Blower speed Error 5 The blower speed has not been detected
Flame circuit Error 8 Flame detection (circuit) error
Gas valve circuit fault Error 9
Gas valve (circuit) error
Error 13
Repeated errors exceeding 5 manual resets in less than 15 minutes
Also in this case, turn the appliance off and on again to reset.
Internal control fault Error 21
Fault on internal equipment/board
CRC connection Error 25 CRC connection error
Supply sensor shorted Error 30
The supply sensor has detected a temperature
outside the admissible range (equivalent to short circuit)
Supply sensor open Error 31
The supply sensor has detected a temperature
outside the admissible range (equivalent to short circuit)
Return sensor shorted Error 43
The return sensor has detected a temperature
outside the admissible range (equivalent to short circuit)
Return sensor open Error 44
The return sensor has detected a temperature
outside the admissible range (equivalent to short circuit)
Errors with safety block
The table below lists the errors/faults that generate a Safety Block.
To restore normal operating conditions:
- Disconnect the electrical and gas power supplies from the appliance
- Eliminate the cause of the fault
- Restart the appliance.
Errors with safety stop
The table below lists the errors/faults that generate a Safety Stop.
To restore normal operating conditions:
- Disconnect the electrical and gas power supplies from the appliance
- Eliminate the cause of the fault
The appliance restarts automatically on the first heat request.
Display items Meaning
Error 7 Flue temperature over limit
ΔTSupply/Returnhigh Error11
ΔTSupply/Return>5°Cforatleast5seconds,onstand-by,
measured continuously
Error 15 On start-up: (Supply T. - Ret. T.) > 3°C
Error 16 On start-up, the supply T. does not vary by at least 1°C
Error 17 On start-up, the return T. does not vary by at least 1°C
Error 18 General sensor error, reading off scale
DHW sensor shorted Error 32
The DHW sensor has detected a temperature
outside the admissible range (equivalent to short circuit)
DHW sensor open Error 33
The DHW sensor has detected a temperature
outside the admissible range (equivalent to short circuit)
Low voltage Error 34
The mains voltage is low (V<230-15%)
Low water pressure Error 37 The water pressure switch detects/signals low pressure
Water pressure error Error 41
The frequency of water pressure update is insufficient
Flue sensor shorted Error 45
The flue sensor has detected a temperature
outside the admissible range (equivalent to short circuit)
Flue sensor open Error 46
The flue sensor has detected a temperature
outside the admissible range (equivalent to short circuit)
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