Faults Displayed On Hydraulic Unit - Fujitsu 112 Installation And Operating Manual

Heat pump split single service 3 phase
6 2

Faults displayed on hydraulic unit

Faults or breakdowns on the hydraulic mode are
indicated by the display on the user interface.
Hydraulic unit : Fault visible on the digital display.
Error number Error contents
- No connection.
10 Outdoor sensor.
33 Heat pump initial temperature sensor error.
44 Heat pump return temperature sensor error.
50 DHW temperature sensor.
60 Ambient temperature sensor 1.
65 Ambient temperature sensor 2.
105 Maintenance message.
121 Flow temperature for (HC1) not reached.
122 Flow temperature for (HC2) not reached.
127 Anti-legionella temperature not reached.
369 External fault (safety component).
Outdoor unit connection error
370
(In the start phase, see the para. "Start-up").
Hydraulic unit : Flashing of the diode visible on the interface card.
Diodes display
LED 2 (green)
1 Flash
4 Flashes
4 Flashes
6 Flashes
6 Flashes
7 Flashes
7 Flashes
7 Flashes
7 Flashes
7 Flashes
7 Flashes
8 Flashes
8 Flashes
9 Flashes
9 Flashes
9 Flashes
10 Flashes
10 Flashes
10 Flashes
Continuous flashing (1 sec On / 1 sec Off)
Continuous lighting
Installation and operating manual "1364 - EN"
Error contents
LED 1 (red)
1 Flash Communication error between Hydraulic unit and Outdoor unit.
1 Flash Heat pump capacity signal error (Open or short).
2 Flashes Hydraulic unit heat-exchange thermistor Error.
3 Flashes Inverter error.
Active filter error.
4 Flashes
PFC error.
1 Flash Discharge thermistor error.
2 Flashes Compressor thermistor error.
Heat-exchange thermistor (outlet) error.
3 Flashes
Heat-exchange thermistor (intermediate) error.
4 Flashes Outdoor thermistor error.
Heat sink thermistor (inverter) error.
7 Flashes
Heat sink thermistor (P.F.C.) error.
8 Flashes Expansion valve thermistor error.
4 Flashes Current sensor error.
Pressure sensor error.
6 Flashes
Pressure switch error.
4 Flashes Current trip.
Detection of compressor position error.
5 Flashes
Compressor start up error.
7 Flashes Outdoor unit fan motor error.
1 Flashes Discharge temperature protection.
3 Flashes Compressor temperature protection.
5 Flashes Low pressure abnormal.
Pump down operation.
Off Defrosting.
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.
Error location
Failure to comply with room
thermostat's polarity.
B9
B21
B71
B3
See page 54.
.
Heat pump operation
despite the error
No
Yes with OT = 0 °C
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
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