Faults; Fault List; Hydraulic Unit Fault - Fujitsu WATERSTAGE 112 Maintenance Document

Heat Pump, Split System, Single Service, 3 phase

4 Faults

4.1

Fault List

4.1.1 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: Heat pump flow temp sensor error
44: Heat pump return temp sensor error
50: DHW temp sensor
60: Room sensor 1
65: Room sensor 2
105: Maintenance message
121: HC1 flow temp not reached
122: HC2 flow temp not reached
127: Legionella protection temp not reached
369: External fault (safety component)
370: Outdoor unit fault*
* 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)
Maintenance Document 1394-1
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)
B9
B21
B71
B3
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.
PFC error.
Discharge thermistor error.
Compressor thermistor error.
Heat-exchange thermistor (outlet) error.
Heat-exchange thermistor (intermediate) error.
Outdoor thermistor error.
Heat sink thermistor (inverter) error.
Heat sink thermistor (P.F.C.) error.
Expansion valve thermistor error.
Current sensor error.
Pressure sensor error.
Pressure switch 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
Yes Yes
automatic are
HP op
Yes
Yes
per diagram
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
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