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Fault Diagnosis
Depending on whether the fault comes from the outdoor unit or the hydraulic unit, the fault may be indicated by the
digital display or the LED on the interface cards.
►
Faults in the Hydraulic Unit
Faults or breakdowns on the hydraulic unit are indicated by the display on the user interface.
The display shows the symbol.
Press the key for more details on the origin of the fault.
When the error has been resolved, the faults are re-initialised at zero automatically.
■ Hydraulic unit: Fault visible on the digital display.
Error Designation Probable causes Proposed actions
10 Outside sensor
Short-circuit.
Unplugged or disconnected sensor.
Faulty sensor.
Other fault.
Check the sensor's wiring.
Replace the sensor.
32 Flow sensor 2
33 Flow sensor HP
44 Return sensor HP
50 DHW sensor 1
60 Room sensor 1
65 Room sensor 2
83 BSB, short circuit
Wiring problem (between the sensor or
remote control, display and controller).
Check the wiring.
127 Legionella temp
Anti-legionella temp setpoint not
reached.
Check the wiring of the DHW
backup / boiler connection.
212 Internal comm failure Unplugged or disconnected sensor. Check the sensor's wiring.
369 External
External safety triggered EX3
(
fi g. 45, page 39).
-
370 Thermodynamic source See details
page 67. -
441 BX31 (Temperature sensor 2)
Short-circuit.
Unplugged or disconnected sensor.
Faulty sensor.
Other fault.
Check the sensor's wiring.
Replace the sensor.
442 BX32 no function
443 BX33 no function
444
BX34 (Swimming pool return
temperature)
516 Heat pump missing
Loss of connection between controller
and HP.
Check the wiring between X60 and the
interface board (fi g. 58, page 78).
Before performing any maintenance, make sure that all power supplies have been
cut off .
Stored energy: after cutting off the power supplies,
wait for 10 minutes before accessing the internal parts of the equipment.
Frost protection is not available when the heat pump is not powered up.
Waterstage Split Comfort DHW Serie / INSTALLATION / 2125 - EN
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