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
10
Outdoor sensor.
B9
Yes with OT = 0 °C
33
Heat pump initial temperature sensor error.
B21
Yes
44
Heat pump return temperature sensor error.
B71
Yes
50
DHW temperature sensor.
B3
Yes
60
Ambient temperature sensor 1.
Yes
65
Ambient temperature sensor 2.
Yes
105
Maintenance message.
Yes
121
Flow temperature for (HC1) not reached.
Yes
122
Flow temperature for (HC2) not reached.
Yes
127
Anti-legionella temperature not reached.
Yes
369
External fault (safety component).
No
370
Outdoor unit connection error
(In the start phase, see the para. “Start-up”).
See
page 54.
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 filter error.
PFC error.
7 Flashes
1 Flash
Discharge thermistor error.
7 Flashes
2 Flashes
Compressor thermistor error.
7 Flashes
3 Flashes
Heat-exchange thermistor (outlet) error.
Heat-exchange thermistor (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 flashing (1 sec On / 1 sec Off)
Pump down operation.
Continuous lighting
Off
Defrosting.
6 2 Faults displayed on hydraulic unit
Faults or breakdowns on the hydraulic mode 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.
Installation and operating manual "1364 - EN"
- 53 -
Heat pump split single service 3 phase