OB274-27
9-3. DRY OPERATION
(1) Press OPERATE/STOP(ON/OFF) button.
OPERATION INDICATOR lamp of the indoor unit turns on
with a beep tone.
(2) Select DRY mode with the OPERATION SELECT button.
(3) The microprocessor reads the room temperature and
determines the set temperature. Set temperature is as
shown on the right chart.
Thermostat (SET TEMPERATURE) does not work.
The other operations are same as DRY mode of “I FEEL
CONTROL”.
(4) DRY operation will not function when the room tempera-
ture is 55
-
F or below.
95
86
77
68
59
50
50
59
68
77
86
95
F
F
9-4. FAN OPERATION
(1) Press OPERATE/STOP(ON/OFF) button. OPERATION
INDICATOR lamp of the indoor unit turns ON with a
beep tone.
(2) Select FAN mode with the OPERATION SELECT button.
(3) Select the desired fan speed. When AUTO,it becomes
Low.
Only indoor fan operates. Outdoor unit does not operate.
High
Rotational frequency
High
time
Med.
Low
AUTO
Horizontal
Middle
Downward
Swing
1
2
3
4
5
9-6. AUTO VANE OPERATION
(1) Vane motor drive
These models are equipped with a stepping motor for the horizontal vane. The rotating direction, speed, and angle of
the motor are controlled by pulse signals (approx. 12V) transmitted from indoor microprocessor.)
(2) The horizontal vane angle and mode changes as follows by pressing the VANE CONTROL button.
9-5. FAN MOTOR CONTROL<MS09>
(1) Rotational frequency feedback control
The indoor fan motor is equipped with a rotational frequency sensor, and outputs signal to the microprocessor to feed-
back the rotational frequency. Comparing the current rotational frequency with the target rotational frequency (High,
Med., Low) the microprocessor controls SR141 and adjusts fan motor electric current to make the current rotational fre-
quency close to the target rotational frequency. With this control, when the fan speed is switched, the rotational frequen-
cy changes smoothly.
(2) Fan motor lock-up protection
When the rotational frequency feedback signal has not output for 12 seconds, (or when the microprocessor cannot
detect the signal for 12 seconds) the fan motor is regarded locked-up. Then the electric current to the fan motor is shut
off. 3 minutes later, the electric current is applied to the fan motor again. During the fan motor lock-up, the OPERATION
INDICATOR lamp flashes on and off to show the fan motor abnormality. (Refer to page 34.)
