Error code
Message
Description
H02.16
Int CSU Timeout
Internal CSU Timeout
H02.25
ACI error
ACI error
H02.36
Funct device lost
Functional device has been disconnected
H02.37
Uncritic device lost
Uncritical device has been disconnected
H02.40
Function unavailable
Function unavailable
H02.48
Funct Gr Conf Fault
Function Group Configuration Fault
H02.60
Unsupported function
The zone doesn't support the selected function
H07.01
Burner fault
Burner fault has occured
8.3
Error codes
If an error code is still present after several automatic start-up attempts,
the boiler switches to fault mode.
The boiler will only resume normal operation once the causes of the lock-
out have been eliminated by the installer.
As a result of:
a manual reset,
a reset by a maintenance message.
When one of the codes below is displayed, contact the professional
responsible for maintenance of the boiler.
Tab.45 List of fault codes
Error code
Message
Description
E00.00
TFlow Open
Flow temperature sensor is either removed or measures a temperature below
range
E00.01
TFlow Closed
Flow temperature sensor is either shorted or measures a temperature above
range
E01.04
5x Flame Loss Error
5x Error of unintended Flame Loss occurance: occurs after 3 H01.03 faults in
the same heating request
E01.12
Return Higher Flow
Return tempearture has a higher temperature value than the flow temperature
E02.13
Blocking Input
Blocking Input of the Control Unit from device external environment
E02.15
Ext CSU Timeout
External CSU Timeout
E02.41
FG press sw present
The Fluegas pressure switch is present
E02.42
Flue T press sw pres
Flue temperature pressure switch is present
E02.44
FG press
Fluegas pressure switch not switched error
8.4
Alarm codes
An alarm code is a temporary boiler status resulting from the detection of
an anomaly. If an alarm code still remains after several automatic start-up
attempts, the boiler goes into fault mode.
When one of the codes below is displayed, contact the professional
responsible for maintenance of the boiler.
Tab.46 List of alarm codes
Alarm code
Message
Description
A00.32
TOutside Open
Outside temperature sensor is either removed or measures a temperature
below range
A00.33
TOutside Closed
Outside temperature sensor is either shorted or measures a temperature
above range
A00.34
TOutside Missing
Outside temperature sensor was expected but not detected
A00.81
RoomTempMissing
Room Temperature sensor was expected but not detected
A02.18
OBD Error
Object Dictionary Error
8 Troubleshooting
7740500 - v02 - 12022021
CFU
35
