• The indoor fan times 60 seconds when any stage stops and there is no demand
(RESTIEVAC_CAL).
N O T E
This process removes residual heat or cold.
• In the event of there being an air quality sensor, the indoor fan could activate if it demands air renewal
(see section
Economiser, return fan and air quality detector, see on page 15
).
In continuous fan mode, with demand for heat and economiser accessory:
• The economiser damper remains closed if the unit cannot produce heat with any of the heat stages.
• The indoor fan stops if the thermostat demands heat with the fan set to automatic and it is not possible
to produce heat in any of the heat stages.
• The indoor fan activates during defrost if there is no alternative way of producing heat and with the
SW8 configuration set to ON. Otherwise, the fan deactivates.
4.3.2 Outdoor fan
N O T E
[See the operating parameters in the section Rooms, see on page 25].
• The outdoor fan starts (MAQTIVXT_CMP) 4 seconds before the compressor starts and stops after
the compressor has stopped.
– In the event of a defrost, start-up (DFRTIVEX) is 10 seconds before finishing the defrost.
In units with a crossed coil (SW3ON and SW5ON):
1. Fan number 2 start-up as first fan.
N O T E
Fan number 2 is located on the gas discharge side (electrical box).
2. Start-up of the following fan:
• When the outdoor temperature is higher than 19 °C (VXTTPBATX_ON).
• When the outdoor probe is open or short circuited.
3. In the event that it is not necessary to stop one of the fans, fan number 1 stops.
N O T E
The fan is located on the side of the compressors.
• If the outdoor temperature is lower than 16 °C (VXTTPBATX_OFF) the second fan stops.
4.3.3 Four-way valve
N O T E
[See the operating parameters in the section Rooms, see on page 25].
• With microswitch SW6 of the control board ON, the 4-way valve activates when the thermostat
demands heat.
N O T E
When a defrost is carried out, the valve is deactivated.
• With microswitch SW6OFF, the valve reverses the operation and it is activated in cool mode.
N O T E
When a defrost is carried out, the valve is activated.
Operation
4
Switching of the main components 4.3
11
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