Split system (Single phase and 3-phase type)
8 Maintenance Document 1544-1
2.1.2 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.
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:
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
LED display on the outdoor unit (single phase and 3-phase)
LED display
Hydraulic Unit
Diagnosis Clear
Green Red
Outdoor unit
Off Serial reverse transfer error. 1
1 flash 1 flash
1 flash Serial forward transfer error. 2
4 flashes 1 flash 22 flashes Heat pump capacity signal error 4
4 flashes 2 flashes 22 flashes Hydraulic Unit Heat ex. Sensor error 5
6 flashes 3 flashes 18 flashes Inverter error. 20
Active filter error (single phase) 21
6 flashes 4 flashes 19 flashes
P.F.C. error (3-phase) 27
7 flashes 1 flash 2 flashes Discharge thermistor error. 7
7 flashes 2 flashes 8 flashes Compressor thermistor error. 11
5 flashes Heat-exchange thermistor (intermediate) error. 12
7 flashes 3 flashes
4 flashes Heat-exchange thermistor (outlet) error. 8
7 flashes 4 flashes 7 flashes Outdoor temperature thermistor error. 9
7 flashes 7 flashes 9 flashes Heat sink thermistor error. 10
7 flashes 8 flashes 6 flashes Expansion valve thermistor error. 14
8 flashes 6 flashes 3 flashes Pressure sensor error. 24
9 flashes 4 flashes 13 flashes Current trip (permanent stoppage). 15
14 flashes Detection of compressor position error (permanent stoppage). 33
9 flashes 5 flashes
15 flashes Compressor start up error (permanent stoppage). 17
16 flashes Outdoor unit fan 1 motor error.
9 flashes 7 flashes
17 flashes Outdoor unit fan 2 motor error.
18
10 flashes 1 flash 11 flashes Discharge temperature protection (permanent stoppage). 22
10 flashes 3 flashes 12 flashes Compressor temperature protection (permanent stoppage). 25
10 flashes 5 flashes 20 flashes Low pressure abnormal. 26
Continuous flashing Pump down operation.
Continuous
lighting
Off
Defrosting.
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