6 Troubleshooting
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 diode on the interface cards.
6.1 Faults displayed on the hydraulic unit
Faults or breakdowns on the hydraulic unit are indicated
by the display on the user interface.
The display shows the "Bell" symbol.
.
Press the Info 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 number Error contents Error location
Heat pump operation
despite the error
- No connection.
Failure to comply with room
thermostat's polarity.
No
0 No fault. Yes
10 Outdoor sensor. B9 (X84) Yes
33 HP initial temperature sensor error. B21 (X80) Yes
44 HP return temperature sensor error. B71 (X80) Yes
50 DHW temperature sensor. B3 Yes
60 Room thermostat 1. Yes
105 Maintenance message . Yes
121 Flow temperature for HC1 not reached. Yes
127 Anti-legionella temperature not reached. Yes
332 BX3 without function. B3
369 External fault (Safety component). No
370
Outdoor unit error
(In the start phase, see the para. “Start-up”).
See below & page 49. No
Hydraulic unit : Flashing of the diode visible on the interface card.
Diodes display
Error contents
LED 2 (green) LED 1 (red)
1 Flash 1 Flash Communication error between Hydraulic unit and Outdoor unit.
4 Flashes 1 Flash Heat pump capacity signal error (Open or short).
4 Flashes 2 Flashes Hydraulic unit heat-exchange thermistor Error.
6 Flashes 3 Flashes Inverter error.
6 Flashes 4 Flashes Active lter error / P.F.C. error.
7 Flashes 1 Flash Discharge thermistor error.
7 Flashes 2 Flashes Compressor thermistor error.
7 Flashes 3 Flashes Heat-exchange thermistor outlet / intermediate error.
7 Flashes 4 Flashes Outdoor thermistor error.
7 Flashes 7 Flashes Heat sink thermistor inverter error / Heat sink thermistor P.F.C. error.
7 Flashes 8 Flashes Expansion valve thermistor error.
8 Flashes 4 Flashes Current sensor error.
8 Flashes 6 Flashes Pressure sensor error / Pressure switch error.
9 Flashes 4 Flashes Current trip.
9 Flashes 5 Flashes Detection of compressor position error / Compressor start up error.
9 Flashes 7 Flashes Outdoor unit fan motor error.
10 Flashes 1 Flashes Discharge temperature protection.
10 Flashes 3 Flashes Compressor temperature protection.
10 Flashes 5 Flashes Low pressure abnormal.
Continuous ashing (1 sec On / 1 sec Off) Pump down operation.
Continuous lighting Off Defrosting.
Installation and operation manual "1397 - EN"
Heat pump split single service alféa Evolution
- 48 -
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