Outdoor Unit Fault - Fujitsu WATERSTAGE 112 Maintenance Document

Heat Pump, Split System, Single Service, 3 phase

4.1.2 Outdoor Unit Fault

When the system is switched back on after a power
outage, the Hydraulic Unit may display fault 370 for a
few tens of seconds. This is not a serious problem. It
simply means that the outdoor unit is running its
tests. Once the tests have been completed, the fault
should disappear.
On the outdoor unit
When an error occurs:
- The diode "ERROR" (2) blinks
Press once on the switch "ENTER" (SW4)
- The "ERROR" (2) diode blinks several times depending on the error's type
Location of switches and diodes on outdoor unit
LED display
Hydraulic Unit
Green 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 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
Maintenance Document 1394-1
Diagnosis
Outdoor unit
Off Serial reverse transfer error.
1 flash Serial forward transfer error.
22 flashes Heat pump capacity signal error
22 flashes Hydraulic Unit Heat ex. Sensor error
18 flashes Inverter error.
19 flashes P.F.C. error.
2 flashes Discharge thermistor error.
8 flashes Compressor thermistor error.
5 flashes Heat-exchange thermistor (intermediate) error.
4 flashes Heat-exchange thermistor (outlet) error.
7 flashes Outdoor temperature thermistor error.
9 flashes Heat sink thermistor (inverter) error.
10 flashes Heat sink thermistor (P.F.C.) error.
6 flashes Expansion valve thermistor error.
3 flashes Pressure sensor error.
13 flashes Current trip (permanent stoppage).
14 flashes Detection of compressor position error (permanent stoppage).
15 flashes Compressor start up error (permanent stoppage).
16 flashes Outdoor unit fan 1 motor error.
17 flashes Outdoor unit fan 2 motor error.
11 flashes Discharge temperature protection (permanent stoppage).
12 flashes Compressor temperature protection (permanent stoppage).
20 flashes Low pressure abnormal.
If it doesn't, if a fault has occurred on the outdoor unit
as indicated by the Hydraulic Unit, you must remove
the front (right-hand) facing from the outdoor unit.
Faults are coded by LED flashes. Error messages are
listed in the table below:
LED display on the outdoor unit
Clear
1
2
4
5
20
27
7
11
12
8
9
10
13
14
24
15
33
17
18
22
25
26
25