YKEQ-YCNQ 251~671 GR Air Conditioners Service Manual
8
Room Temp.
Set TEMP. ＋1
℃
Set TEMP. －1
℃
Time
More than 2 min More than 2 min More than 2 min More than 2 min More than 2 min
Indoor Fan Set Speed Set Speed Set Speed Set Speed Set Speed
Compressor ON OFF ON OFF ON
Outdoor Fan ON OFF ON OFF ON
4. “DRY” Mode Operation
(1) The system for DRY operation used the same refrigerant circle as the cooling circle.
(2) When the system operates in DRY mode ,at first it operates in cooling mode at 16
℃ or 18℃ for 3 minutes.
And then, the system operates in cooling mode with low speed that regards the temperature of the room
temperature sensor reads decrease 2℃ as the set temperature. During the course of this, the fan speed
set operation is failing but the vane motor can be controlled.
5. “HEATING” Mode Operation (Only available for Heat Pump)
(1) When the HEATING mode is selected without setting temperature, the system will set the temperature at 23
℃ automatically with the AUTO FAN speed.
(2) When selecting the HEATING mode operation, the system will operate according to the setting by the
remote controller and the operation is as following:
Set Temp. ＋1℃
Set Temp. －1
℃
Room Temp.
Time
More than 2 min More than 2 min More than 2 min More than 2 min More than 2 min
Compressor ON OFF ON OFF ON
Outdoor fan ON OFF ON OFF ON
(3) In HEATING mode, the indoor fan motor speed is controlled by Cold Air Prevention Control.
(4) Cold Air Prevention Control
The function is intend to prevent cold air from being discharged when the heating operation starts or
when defrosting.
The indoor fan speed will be controlled as following.
The vane angle is at the angle C(100°).
Set Speed Set Speed
34
℃
Low Speed
27
℃
Low Speed
25℃
Stop the fan
23℃
Stop the fan
During the heating operation, if the compressor stops that it will adjust the indoor fan speed, after 30
seconds to stop the fan.
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