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(3) Indoor fan control/ Vane control
As the indoor fan speed and the horizontal vane position depend on the selected operation mode, when the operation
mode changes over, they change to the exclusive ones.
2-5. OUTDOOR FAN MOTOR CONTROL
Fan speed is switched according to the compressor frequency.
COOL
Fan speed
Up
Down
Up
Down
Mode
HEAT
(MUZ)
Compressor frequency (Hz)
MUZ-A09/12/15/17/24
MUY-A15/17/24
<Relation between compressor frequency and fan speed.>
44
33
44
33
Up
Down
Fan speed
High
Low
Compressor frequencyMin. Max.
2-6. AUTO VANE OPERATION
1. Horizontal vane
(1) Cold air prevention in HEAT operation. (MUZ)
When any of the following conditions occurs in HEAT operation, the vane angle changes to Horizontal position automati-
cally to prevent cold air blowing on users.
① Compressor is not operating.
➁ Defrosting is performed.
➂ Indoor coil thermistor RT12 temperature does not exceed 102ºF within about 3 minutes after compressor starts.
NOTE: When 2 or more indoor units are operated with multi outdoor unit, even if any indoor unit turns thermostat off,
this control doesn’t work in the indoor unit.
(2) ECONO COOL ( ) operation (ECONOmical operation)
When ECONO COOL button is pressed in COOL mode, set temperature is automatically set 3.6 degrees higher than
that in COOL mode.
Also the horizontal vane swings in various cycle according to the temperature of indoor heat exchanger (RT12).
SWING operation makes you feel cooler than set temperature. So, even though the set temperature is higher than that
in COOL mode, the air conditioner can keep comfort. As a result, energy can be saved.
ECONO COOL operation is cancelled when ECONO COOL button is pressed once again or VANE CONTROL
button is pressed or change to other operation mode.
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