How It Works; Hints For Economical Operation - Carrier 42QTD012DS Series Owner's Manual

2. OPEATION

2.2 HOW IT WORKS

Basic Operation Modes：AUTO / COOL / DRY / HEAT / FAN
AUTO Mode
In this setting the system will automatically change modes and fan speed to the set temperature.
[In spring and autumn, closer temperature control may require COOL/HEAT mode changes.]
DRY Mode
In this mode, priority is given to dehumidifying the air. Low fan speed and compressor cycling is used to achieve this and regulate room
temperature.
Compressor Delay
At start-up, a time delay of 3 to 4 minutes protects the compressor.
Cold Draft Prevention
To avoid uncomfortable drafts in heating mode, the indoor unit is preheated before the fan starts. This delay should only last a few
minutes.
Auto Defrost
Ice develops on the outdoor unit in heating mode. To defrost this ice, the indoor fan stops for a few minutes before heating continues.
Auto Restart*
The unit will automatically restart after a power interruption. Previous user settings are all recovered.
Auto Leak Detection*
When refrigerant leakage is detected, the unit will display "EC" code or flash LEDs.
Louver Memory*
Louver angle is memorised and will return to the position last selected by the user.
Adjusting Air Flow Direction
Press "AIR DIRECTION" on remote controller to adjust air flow direction. The louver position moves slightly each time the button is
pressed.
Press "SWING" to engage continous louver motion.
[*] Model dependent

2.3 HINTS FOR ECONOMICAL OPERATION

Adjust the temperature to achieve moderate comfort levels. Excessively low or high temperatures waste energy.
Improve performance by keeping windows and doors closed.
Limit energy usage [run time] by using the TIMER function.
Do not block air inlets or outlets. Poor performance, increased running costs and reduced product life will result.
Inspect the air filters periodically, and clean them when needed.
Disconnect the power source if unit will not be used for a long period.
GB-5 7 2
NOTE
Please refer to the REMOTE CONTROLLER
MANUAL for details.
In cooling or dry mode, condensate may form and
drip from unit in high humidity condition if louver
position is in Maximum down.
Do not operater the unit with louver closed or
narrow opening. Restricted air flow reduced
performance and may cause condensate.