Fan Motor Does Not Work While "On" Button Is Pressed; Fan Works At One Speed Only; Poor Cooling - Technibel MTV72C5 Technical Data & Service Manual

7-3 Fan motor does not work while "ON" button is pressed

YES
Check hardness and
various continuities
YES
Check the capacitor
capacity (C)
YES
Check the fan motor
windings (FM)

7-4 Fan works at one speed only

Check electrical connections.
Is there continuity ?
YES
Check fan motor winding
values (FM)

7-5 Poor cooling

Is the unit cooling capacity
suitable for the room
thermal loads ?
YES
Are both air filters and heat
exchanger cleaned ?
YES
Check if difference bet-
ween room air
temperature and outlet air
delivered is up to 10 °C
Disconnect the unit from line. Check if the fan motor is well
fitted and if the blades can rotate
Fit the fan motor
INTERRUPTED
NO
normal operations
foreseen for the
NO
properly or
replace it
NO
NO
NO
NO
NO
YES
Low
gas charge
Proceed with
above points
11
Remove obstruction
or replace fan motor
assembly
Replace the capacitor
Replace the fan motor
assembly
Fit electrical connections
properly
Replace fan motor (FM)
Suggest a more
powerful unit
Clean filters and / or
heat exchanger
The unit works properly
NO
NO