• For the user convenience, the extraction side of the filter can be inverted by just swaping the filter plates found on
either sides of the air filter:
• The correct maintenance of the appliance is helped out by the presence of a clogged air filter detector.
This device will show a warning in the screen of the appliance if the air filter head loss has reached the
predefined value in the sensor.
4.1.2 Annual maintenance to be performed by a qualified technician
• Check that the electric cable connections are correctly tightened to their terminals on the terminal board, in addition
to the contactor screws,
• Check that each command relay and power contactor is operational.
• On the DF2 three phase models, thanks to the phase order controller, any modification of the sequence
of phases on the distribution network or on the existing electrical installation is detected. The appliance
then goes into fault mode (see § 3.2.1 "Switching on the appliance").
• Clean the outside of the whole unit with a slightly damp cloth.
• Check the cleanliness of the condensation tray and drainage tube.
• A visual inspection of coil clogging (evaporator/condenser and hot water coil kit if present) can improve the appliance's
performance, and is performed by following the disassembly procedure below (when powered off):
❶
❷
Check fan status
• Depending on the condition, clean with a bristle brush and vacuum cleaner.
1/4 turn
❸
Check frigorific coils status
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