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Fault Diagnosis
If a fault occurs, the error number appears on the welcome screen.
To obtain the error's designation, select it using the knob.
15:23
12°
24,0°
--,-
OFF
7 September 2017
Error XXX
In the event of an error originating in the outdoor unit, the user interface displays
error code "370: Thermodynamic Generator" followed by the outdoor unit error.
Error
138: No control sensor HP
Validate
The error log can be viewed in the "System Status" > "Errors history", page 61.
►
Faults in the Hydraulic Unit
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.
46, page 43).
-
370 Thermodynamic source
See details in
"Faults in the outdoor
unit".
-
441 BX31 no function
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 no function
516 Heat pump missing
Loss of connection between
controller and HP.
Check the wiring between X60 and
the interface board
fi g. 59, page 82.
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.
Alfea Extensa A.I. R32 / INSTALLATION / 2114 - EN
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