Faults; Fault List; Hydraulic Unit Fault - Fujitsu WATERSTAGE WS A050DD6 Series Maintenance Document

Split system single 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)
1 Flash
4 Flashes
4 Flashes
6 Flashes
6 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)
ON
OFF
Maintenance Document 1589-3
Fault description
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.
4 Flashes Active filter error.
4 Flashes PFC error
1 Flash Discharge thermistor error.
2 Flashes Compressor thermistor error.
3 Flashes Heat-exchange thermistor (outlet) error.
4 Flashes Outdoor thermistor error.
8 Flashes Expansion valve thermistor error.
4 Flashes Current sensor error.
6 Flashes Pressure sensor error.
4 Flashes Current trip.
5 Flashes Detection of compressor position error.
Compressor start up error.
7 Flashes Outdoor unit fan motor error.
1 Flash Discharge temperature protection.
3 Flashes Compressor temperature protection.
5 Flashes Low pressure abnormal.
Pump down operation.
OFF During defrost
OFF Normal operation / Operation stops
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
automatically reset.
• Heat pump op: shows whether or not the heat pump
operates despite the fault.
Location
(connection) Manual
X86
X70
X70
X84
the polarity of the
room sensor is not
respected.
deletion is automatic
Reset
HP op
Auto
No No
No No
No No
No No
No No
No No
No No
No No
No No
No No
No No
- -
Clear
are
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
1, 2
4
5
21
21
7
11
8
9
14
16
24
15
17
18
22
25
26
5