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4-8 Forced Mode
In this mode the system operates (COOLING or HEATING mode – fixed settings) or is switched off by
means of the MODE button on the indoor unit control board. The operation modes can be selected
pressing the button in a cyclic way (OFF COOL HEAT OFF...). The settings are:
COOLING mode
SET POINT temperature = 25°C
FAN SPEED = HIGH
FLAP POSITION = 3
HEATING mode
SET POINT temperature = 21°C
FAN SPEED = HIGH
FLAP POSITION = 4
4-9 Protection operations indoor unit
4-9.1 Freeze-up
This protection prevents ice formation on the indoor coil heat exchanger. The protection is activated
as soon as the indoor coil temperature ICT decreases and acts by decreasing the compresor speed
The system exit this protection routine when ICT temperature rises above 5°C.
4-9.2 Cold draft
This feature prevents the supply of cold air forcing the indoor fan to a speed which cannot be changed
by the user.
If the ICT temperature goes down 32°C (in descending) or does not reach 37°C (in rising), the speed
fan is set as shown below.
Remote
controller set
LOW
LLOW
OFF
4-9.3 Overheat
This feature prevents the build up of high pressure in the indoor heat exchanger during heating operation
As soon as the indoor coil temperature (ICT) increases, compressor speed is reduced in order to avoid
heat exchanger overheating. System stops compressor operation when ICT reaches 60 °C
26
29
31 32
13
Protection level
0
1
2
3
34
37
ICT (°C)
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