35
M.FACSW90IU-00 ITA-ENG 13/03/2023
FD
EN
22 Start up
22.1 Preliminary checks
Warning: Check that all power cables are properly connected and that all terminals are secure.
Warning: The voltage must be that indicated on the label of the unit ± 5% tolerance. If this does not happen, please
contact our factory office.
Warning: before starting up, check that all the cover panels are in the correct position and are locked with fixing screws.
Warning: For temporary shutdown (night, weekend, etc.) never interrupt the power supply and follow the procedures
illustrated in the paragraph on machine shutdown.
Warning: For temporary shutdown (night, weekend, etc.) never interrupt the power supply and follow the procedures
illustrated in the paragraph on machine shutdown.
Warning: Before to start the machine for the first time it must remains in STAND BY mode for at least 5 hours.
In order to start the machine the general disconnector must be close: at this point the led power will turn on.
All units are provides with a pcb that manages the unit. In order to start the unit use the thermostat at this point the led
RUN will turn on.
1. Connect the internal unit to the outdoor one. There are 4 connectors. Two for water-glycol (connect the same pipe
N°1 with N°1, N°2 with N°2) (C); one for drained condensed water (D) which is sent to outdoor unit, one which is
the electric power supply for outdoor motor-fan (A) and one for the protection heart connection, (B).
Warning: the earth connection is mandatory
2. Insert the socket in an earthed plug.
3. Select desired fan speed
4. Select desired room temperature
5. Move the main switch from OFF position to Cool or Fan position.
The machine should start. If it’s set in Cool function and the room temperature is higher than the set temperature, the
compressor after approx. 3,5 minutes starts to work. Led RUN is blinking while compressor is waiting, it’s on when
compressor is running.
If the room temperature is lower than the set, machine remains in ventilation but it does not make cool (the compressor
remains off and only the fan is on). Led RUN is off. If room temperature is lower than 18°C, automatic defrost system
can star working; periodically the internal unit fan stops and the two refrigerant electro-valves invert their position. Thus,
hot gas passes in the iced evaporator, and the ice falls down as water. Display shows “dEFr”.
After every defrost cycle, machine works regardless environment temperature for 90 seconds in order to move the air in
the room. At the end of these 90 seconds, PCB check thermostat state.
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