Faults; Fault List; Hydraulic Unit Fault; Compressor - Fujitsu Waterstage WS G140DC6 Series Maintenance Document

Split system (Single phase and 3-phase type)

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:
No.: Designation of error
10: Outdoor sensor
33: Flow sensor HP
44: Return sensor HP
50: DHW sensor 1
60: Room sensor 1
65: Room sensor 2
105: Maintenance message
121: Flow temp HC1 (too low)
122: Flow temp HC2 (too low)
127: Legionella temp
369: External fault (safety component)
370: Thermodynamic source*
No connection
* 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)
1 Flash 1 Flash
4 Flashes 1 Flash
4 Flashes 2 Flashes
6 Flashes 3 Flashes
6 Flashes 4 Flashes
7 Flashes 1 Flash
7 Flashes 2 Flashes
7 Flashes 3 Flashes
7 Flashes 4 Flashes
7 Flashes 7 Flashes
7 Flashes 8 Flashes
8 Flashes 4 Flashes
8 Flashes 6 Flashes
9 Flashes 4 Flashes
9 Flashes 5 Flashes
9 Flashes 7 Flashes
10 Flashes 1 Flash
10 Flashes 3 Flashes
10 Flashes 5 Flashes
Continuous flashing (1 sec ON / 1 sec OFF)
6
 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
automatically reset.
 Heat pump op: shows whether or not the heat pump
operates despite the fault.
Location
(connection)
X86
X70
X70
X84
the polarity of the
room sensor is not
respected.
Fault description
Communication error between Hydraulic Unit and Outdoor unit.
Heat pump capacity signal error (Open or short).
Hydraulic Unit heat-exchange thermistor Error.
Inverter error.
Active filter error.
Discharge thermistor error.
Compressor thermistor error.
Heat-exchange thermistor (outlet) error.
Heat-exchange thermistor (intermediate) error.
Outdoor thermistor error.
Heat sink thermistor error.
Expansion valve thermistor error.
Current sensor error.
Pressure sensor error.
Current trip.
Detection of compressor position error.
Compressor start up error.
Outdoor unit fan motor error.
Discharge temperature protection.
Compressor temperature protection.
Low pressure abnormal.
Pump down operation.
whose deletion is
Reset
Manual Auto
No No
No No
No No
No No
No No
No No
No No
No No
No No
No No
No No
- -
Maintenance Document 1544-1
automatic are
HP op
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No