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Air to Water Heat Pump
6 4
Faults displayed
on the 3-phase outdoor unit
To access the electronic board, you must remove the
front (right-hand) facing from the outdoor unit.
Faults are coded by diode flashes.
and switches
figure 45 - Location of switches and diodes
on 3-phase outdoor unit
Diode display
1 Flash
2 Flashes
3 Flashes
4 Flashes
5 Flashes
6 Flashes
7 Flashes
8 Flashes
9 Flashes
10 Flashes
11 Flashes
12 Flashes
13 Flashes
14 Flashes
15 Flashes
16 Flashes
17 Flashes
18 Flashes
19 Flashes
20 Flashes
21 Flashes
22 Flashes
Installation and operating manual "1533 - EN"
Diodes
Terminal
block
Error contents
Serial forward transfer error.
Discharge thermistor error.
Pressure sensor error.
Heat-exchange thermistor (outlet) error.
Heat-exchange thermistor (intermediate) error.
Expansion valve thermistor error.
Outdoor temperature thermistor error.
Compressor thermistor error.
Heat sink thermistor (inverter) error.
Heat sink thermistor (P.F.C.) error.
Discharge temperature protection (permanent stoppage).
Compressor temperature protection (permanent stoppage).
Current trip (permanent stoppage).
Detection of compressor position error (permanent stoppage).
Compressor start up error (permanent stoppage).
Fan motor 1 error (permanent stoppage).
Fan motor 2 error (permanent stoppage).
Inverter error.
P.F.C. error.
Low pressure abnormal.
Connection with hydraulic unit error.
Hydraulic unit abnormality condition.
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 (see below).
(1)
(2)
SW2
SW3
figure 46 - LED display on the 3-phase outdoor unit
(3)
(4)
SW4
SW5
- 59 -
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