6 Breakdown diagnosis and information
Depending on whether the fault is from the outdoor unit
or the Hydraulic module, the fault may be signalled by
the digital display or the diode on the interface boards.
6 .1 Faults displayed on the Hydraulic module
The faults or breakdowns of the hydraulic module are
advised on the display unit of the user interface.
the display shows the symbol
Press the button
to obtain details on the origin of
the fault
When the error is resolved, the faults are cleared
automatically
Hydraulic module
: Visible faults on the digital display.
Error number Error contents
Error location
PAC operation in
spite of error
-
No connection.
The polarity of the ambient
sensor has not been respected.
No
10
Outdoor sensor.
B9
Yes
33
Heat pump start sensor temperature error.
B21
Yes
44
Heat pump start sensor temperature error.
B71
Yes
50
DHW temperature sensor.
B3
Yes
60
Ambient sensor 1.
Yes
65
Ambient sensor 2.
Yes
105
Maintenance message.
Yes
121
Heating circuit 1 start temperature not reached.
Yes
122
Heating circuit 1 start temperature not reached.
Yes
127
Anti-legionella temperature not reached
Yes
369
Hydraulic pressure fault.
No
370
outdoor unit error
(in a start up phase, see § "Commissioning").
see below.
No
Hydraulic module
: Visible flashing of the diode on the interface board.
Error text
Error contents
LED 2 (green)
LED 1 (red)
1 Flash
1 Flash
communication error between the Hydraulic module and the outdoor unit.
4 Flashes
1 Flash
connection error between the Hydraulic module and the outdoor unit.
4 Flashes
2 Flashes
Hydraulic unit heat-exchange thermistor Error.
6 Flashes
3 Flashes
Inverter error.
6 Flashes
4 Flashes
active filter 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
radiator temperature probe error (inverter / P.F.C).
7 Flashes
8 Flashes
Expansion valve thermistor error.
8 Flashes
4 Flashes
Current sensor error.
8 Flashes
6 Flashes
Pressure switch probe error . / pressure sensor. error
9 Flashes
4 Flashes
Current sensor error.
9 Flashes
5 Flashes
Detection ofthe position error of te compressor rotor.
Error on compressor start up.
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.
continually flashing
(1 sec lit /1 sec extinguished)
Pump down operation.
Permanently lit
Stop
Defrosting.
Installation and operating manual
"
1605 - EN
"
- 57 -
alfea hybrid duo heat pump oil low NOx CH