Fujitsu AOY54LJBYL User Manual

6 Troubleshooting
Depending on whether the fault comes from the
outside unit or the hydraulic module, the fault may be
indicated by the digital display or the diode on the
interface cards.
6.1 Faults displayed on hydraulic
module
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 “1350-EN” 57
Heat pump, Split, single service
Hydraulic module : Fault visible on the digital display
Error number Error description 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 Outside unit connection error See below and fig. 58 and 59 No
Hydraulic module : Flashing of the diode visible on the interface card
Diode display Erroneous element
1 Flash Transmission error, "hydraulic module - outside unit"
2 Flashes Abnormal discharge temperature or defective discharge sensor
3 Flashes Defective exchanger sensor
4 Flashes Defective outside temperature sensor
5 Flashes
Abnormal compressor temperature or defective compressor
temperature sensor
6 Flashes HP pressure switch cut off
7 Flashes Abnormal current quality
8 Flashes Current quality detection circuit defective
9 Flashes Active filter error
10 Flashes Compressor is not operating
11 Flashes External fan error
12 Flashes Compressor casing resistance fault
13 Flashes Active filter cut off for over-intensity
CN9
CN1
CN2
CN4
CN5
CN14
CN15
CN7
CN8

Fujitsu AOY54LJBYL Specifications

General

Brand	Fujitsu
Model	AOY54LJBYL
Category	Heat Pump
Language	English