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Fault
►
Fault List
▼ Hydraulic Unit Fault
Faults which occur on the Hydraulic Unit are shown by
the symbol. Press the info key for details on the cause
of the fault. The following information is displayed :
• Description of the error.
• Location of the error (sensor or contact).
• Reset. Depending on its type, the fault can be manually
or automatically deleted.
Manual delete. The text displayed when pressing the
info key shows "Reset ?". Press OK once, the Yes
fl ashes; press again to confi rm deletion of the fault.
Faults whose deletion is automatic are automatically
reset.
Heat pump op: shows whether or not the heat pump
operates despite the fault.
Nr
Designation of error
Location (connection)
Reset
HP op
Manual
Auto
10
Outdoor sensor
X84
No
No
Yes
30
Flow sensor mixing circuit
X153
No
No
Yes
33
Flow sensor HP
X70
No
No
Yes
44
Return sensor HP
X70
No
No
Yes
50
DHW sensor 1
X84
No
No
Yes
60
Room sensor 1
X86
No
No
Yes
65
Room sensor 2
X150
No
No
Yes
83
BSB, Short circuit
No
No
Yes
105
Maintenance message
No
No
Yes
121
Flow temp mixing circuit (too low)
No
No
Yes
122
Flow temp direct circuit (too low)
No
No
Yes
127
Legionella temp
No
No
Yes
212
Internal comm failure
No
No
Yes
356
Flowmeter
X86
No
No
No
369
External fault (safety component)
X11 (EX3)
No
No
No
370
Thermodynamic source*
No
No
No
441
BX31 no function
No
No
No
442
BX24 no function
No
No
No
443
BX33 no function
No
No
No
444
BX34 no function
No
No
No
516
Heat pump missing
No
No
No
-
No connection
The polarity of the room
sensor is not respected.
-
-
No
* A fault in the outdoor unit is indicated by LED located on the Hydraulic Unit interface board.
Waterstage / Maintenance Manual / 2105 - EN
