Carrier 40DMC Owner's Manual page 10

Very poor air conditioning efficiency:
• The air flow to or from the indoor or out-
door unit is obstructed.
• The air filter is dirty and is restricting the
air flow. The filter must be cleaned only by
qualified personnel.
• A door or window is open.
• Fan speed is on a low setting.
• The temperature setting is not suitable.
Mist comes out of the unit:
• This can occur when the appliance is
functioning in cooling mode. It is caused by
cold air from the air conditioner coming into
contact with warm, humid air in the room.
The air conditioner whistles briefly
when it is switched on or off.
• This is caused by the coolant starting to
circulate and pressure equalising inside
the coolant circuit. It is normal and stops
quickly.
The unit emits an unpleasant smell
• Unpleasant smells can build up in the
indoor unit's air filter and be blown into the
room when the appliance is functioning.
Switch the appliance off and call an autho-
rised service centre to have the filters
changed. Re-start the appliance in ventila-
tion mode and open the windows to
change the air.
GB-8
Disposal
The coolant in the appliance must be
recovered and disposed of by qualified
personnel before the appliance itself can
be disposed of. At the end of the appli-
ance's useful life, have the appliance and
all its components processed and dis-
posed of by a proper disposal service.