7-3 Fan motor does not work while "ON" button is pressed
YES
NO
NO
Check hardness and
Fit the fan motor
Remove obstruction
various continuities
properly or
or replace fan motor
YES
replace it
assembly
Check the capacitor
NO
capacity (C)
YES
Check the fan motor
INTERRUPTED
Replace the fan motor
windings (FM)
assembly
7-4 Fan works at one speed only
Check electrical connections.
NO
Fit electrical connections
Is there continuity ?
properly
YES
Check fan motor winding
NO
values (FM)
Replace fan motor (FM)
7-5 Poor cooling
Is the unit cooling capacity
NO
Suggest a more
suitable for the room
powerful unit
thermal loads ?
YES
Are both air filters and heat
NO
Clean filters and / or
exchanger cleaned ?
heat exchanger
YES
Check if difference bet-
YES
ween room air
temperature and outlet air
delivered is up to 10 °C
NO
Low
NO
gas charge
Proceed with
normal operations
foreseen for the
above points
fitted and if the blades can rotate
Disconnect the unit from line. Check if the fan motor is well
Replace the capacitor
The unit works properly
11