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The system for dry operation uses the same refrigerant circuit as the cooling circuit.
The compressor and the indoor fan are controlled by the room temperature.
By such controls, indoor flow amounts will be reduced in order to lower humidity without much room temperature decrease.
6-14. 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 OPERATION SELECT button.
(3) The microprocessor reads the room temperature and determines
the set temperature. Set temperature is as shown on the right
chart.
35
30
25
20
15
10
:
10 15 20 25 30 35
Set temperature
Initial room temperature
Set temperature and
initial room temperature in dry mode
:
2. Indoor fan speed control
Indoor fan operates continuously at the set speed by FAN SPEED CONTROL button
regardless of the thermostat’s OFF-ON.
In AUTO the fan speed is as follows.
Room temperature minus set temperature : 1.7
:
or more ········································High
Room temperature minus set temperature : Between 1 and 1.7
:
··································Med.
Room temperature minus set temperature : less than 1
:
········································Low
1.7
:
3
:
1
:
Initial temperature difference
Difference between room
temperature and set tempera-
ture during operation
Fan speed
Temperature of indoor coil thermistor
10°C or more
6°C to 8°C
3°C to 6°C
3°C or less
Operation frequency
Normal (variable)
8°C to 10°C
Raise 6Hz
Fixed
Lower 3Hz
Lower 6Hz
Compressor is turned OFF for 5 minutes when temperature of
indoor coil thermistor continues 3°C or less for 5 minutes or more.
The indoor fan maintains the actual speed of the moment.
3. Coil frost prevention
Temperature control
When indoor coil thermistor detects following temperature for 90 seconds, operational frequency
of compressor is controlled according to the following table.
4. Low outside temperature operation
If the outside temperature falls to 18°C or less during operation in COOL mode, the unit enters the low outside temperature
operation mode.
<Operation>
(1) If the unit enters the low outside temperature operation mode, the outside fan rotation speed gets slow down.
(2) Even when the unit is in the "thermostat-off" status under the low outside temperature operation mode, the outside fan
rotation does not stop.
(3) Outside temperature detecting control
In this mode to detect the exact outside temperature the compressor turns OFF with the outdoor fan ON for 3 minutes
once 1 hour; if the outside temperature rises over 18°C, the unit goes back to the normal COOL mode, and if the outside
temperature is still 18°C or less, the unit stays in the low outside temperature operation mode.
(4) Dew drop prevention
When the ambient temperature thermistor RT65 reads -12
:
or less, as coil frost or dew drop from indoor unit may
occur, the compressor turns OFF with the outdoor fan ON for prevention of them.
W
Other protections work as well as in the normal COOL mode.
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