Fujitsu Waterstage WS G140DC6 Series - Faults; Fault List

Split system (Single phase and 3-phase type)
6 Maintenance Document 1544-1
2 Faults
2.1 Fault List
2.1.1 Hydraulic Unit Fault
Faults which occur on the Hydraulic Unit are shown
by the symbol
. Press the info key for details on the
cause of the fault. The following information is
displayed:
 Description of the error
 Location of the error (sensor or contact)
 Reset. Depending on its type, the fault can be
manually or automatically deleted:
 Manual delete: the text displayed when pressing
the info key shows "reset ?". Press OK once, the
yes flashes; press again to confirm deletion of the
fault.
 Faults whose deletion is automatic are
automatically reset.
 Heat pump op: shows whether or not the heat pump
operates despite the fault.
Reset
No.: Designation of error
Location
(connection)
Manual Auto
HP op
10: Outdoor sensor X86 No No Yes
33: Flow sensor HP X70 No No Yes
44: Return sensor HP X70 No No Yes
50: DHW sensor 1 X84 No No Yes
60: Room sensor 1 No No Yes
65: Room sensor 2 No No Yes
105: Maintenance message No No Yes
121: Flow temp HC1 (too low) No No Yes
122: Flow temp HC2 (too low) No No Yes
127: Legionella temp No No Yes
369: External fault (safety component) No
370: Thermodynamic source* No No No
No connection
the polarity of the
room sensor is not
respected.
- - No
* A fault in the outdoor unit is indicated by LED located on the Hydraulic Unit interface board.
LED display
LED 2 (green) LED 1(red)
Fault description
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.
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 error.
7 Flashes 8 Flashes Expansion valve thermistor error.
8 Flashes 4 Flashes Current sensor error.
8 Flashes 6 Flashes Pressure sensor 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 Flash 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.