LG K12AH Schematic
MODELS: S4-S5-SE Chassis
3
12
12
13
24
25
5
6
7
28
34
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IN DOOR
Lights up during indoor unit operation.
(Optional)
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(Optional)
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(1) Cooling Only Models
INDOOR UNIT
(2-a) Cooling & Heating Models 12K-18K-24K
INDOOR UNIT
OUTDOOR UNIT
OUTDOOR UNIT
(2-b) Cooling & Heating Models 9K
INDOOR UNIT
OUTDOOR UNIT
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09K-12K
18K-24K
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IN DOOR Indicator
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• While in appliance operation, ON while in indoor unit running, OFF while in indoor unit off.
(Optional)
(Optional)
IN DOOR Indicator
• While in appliance operation, ON while in indoor unit running, OFF while in indoor unit off.
(Optional)
(Optional)
While in compressor off, the indoor fan repeats low air flow speed and pause.
While the intake air temp is between compressor on temp, and compressor off temp., 10-min dehumidification
operation and 4-min compressor off repeat.
Compressor ON Temp Setting Temp+0.5°C
Compressor OFF Temp Setting Temp-0.5°C
In 10-min dehumidification operation, the indoor fan operates with the low airflow speed
Heating Mode Operation
When the intake air temp reaches +4°... above the setting temp, the compressor is turned off.When below the
setting temp +2°, the compressor is turned on.
Compressor ON Temp Setting Temp+2°C
Compressor OFF Temp Setting Temp+4°C
While in compressor on, the indoor fan is off when the indoor pipe temp.is below 20°C, when above 28°C, it ope rates with the low or setting airflow speed.When the indoor pipe temp is between 20°C and 28°C, it operates with
Super-Low (while in sleep mode , with the medium airflow speed).
While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C, when above 35°C, it ope rates with the low airflow speed.
If overloaded while in heating mode operation, in order to prevent the compressor from OLP operation, the outdoor
fan is turned on/off according to the indoor pipe temp.
While in defrost control, both of the indoor and outdoor fans are turned off
Defrost Control
While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from freezing, reversed
to cooling cycle to defrost the evaporator pipe of the outdoor unit.
After 40 min heating mode operation, at 4 min interval, whether to carry out defrost control or not and the time of
defrost control are determined according to the following conditions.
1) While in heating mode operation, the maximum of the indoor pipe temperature is measured and it is compared
with the present indoor pipe temperature to get the difference of the indoor pipe temperatures (=the maximum
temperature of indoor pipe - the present temperature of indoor pipe), according to wich, whether to carry out de frost control or not is determined.
2) According to the need of defrost control shown above and the elapsed time of heating mode operation at that
moment, the defrost control time is determined.
3) When the determined time of defrost control is below 7 min, heating mode operation continues without carrying
out defrost control.According to the procedure stated above, the determination is made again.When the defrost
control time is 7 min or longer, defrost control is then carried out.
While in defrost control, the minimum temp of the indoor pipe is measured and it is compared with the present
temp of the indoor pipe to get the difference of the indoor pipe temperatures (=the present temperature of the in-
door pipe - the minimum temperature of the indoor pipe). When the difference is 5°C or higher, defrost control is
completed and heating mode operation is carried out.
While in defrost control, if the defrost time determined before the start of defrost control is completed, defrost cont rol stops and heating mode operation is carried out regardless of the above condition.
When the indoor pipe temp is 42°C or above, defrost control is not carried out even if the condition is one of the
defrost conditions above.
Fuzzy Operation (C/O Model)
According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp,
the compressor is turned off.When 0.5°C or more above the setting temp, the compressor is turned on.
Compressor ON Temp Setting Temp+0.5°C
Compressor ON Temp Setting Temp+0.5°C
At the beginning of fuzzy mode operation, the setting temperature is automatically selected according to the intake
air temp at that time.
26°C Intake Air Temp 25°C
24°C Intake Air Temp < 26°C Intake Air Temp +1°C
22°C Intake Air Temp < 24°C Intake Air Temp +0,5°C
18°C Intake Air Temp < 22°C Intake Air Temp
Intake Air Temp < 18°C 18°C
When the fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy
key value and the intake air temperature at that time are compared to select he setting temperature automatically
according to the Fuzzy rule.
While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature
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Fuzzy Operation (H/P Model)
When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since the
operation off, the operation mode is selected.
When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and only the
indoor fan is operated for 15 seconds.They an operation mode is selected according to the intake air temp at that
moment as follows.
24°C Intake Air Temp Fuzzy Operation for Cooling
21°C Intake Air Temp < 24°C Fuzzy Operation for Dehumidification
Intake Air Temp < 21°C Fuzzy Operation for Heating
If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10 sec
or longer before Fuzzy operation, the mode before Fuzzy operation is operated.
1) Fuzzy Operation for Cooling
According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below the
setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned
on.
Compressor ON Temp Setting Temp+0.5°C
Compressor OFF Temp Setting Temp+0.5°C
At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the in take air temp at that time.
26°C Intake Air Temp 25°C
24°C Intake Air Temp < 26°C Intake Air Temp +1°C
22°C Intake Air Temp < 24°C Intake Air Temp +0,5°C
18°C Intake Air Temp < 22°C Intake Air Temp
Intake Air Temp < 18°C 18°C
When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy
key value and the intake air temperature at that time are compared to select the setting temperature automatically
according to the Fuzzy rule.
While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature
2) Fuzzy Operation for Dehumidification
According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below the
setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned
on.
Compressor ON Temp Setting Temp+0.5°C
Compressor OFF Temp Setting Temp+0.5°C
At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the in take air temp at that time.
26°C Intake Air Temp 25°C
24°C Intake Air Temp < 26°C Intake Air Temp +1°C
22°C Intake Air Temp < 24°C Intake Air Temp +0,5°C
18°C Intake Air Temp < 22°C Intake Air Temp
Intake Air Temp < 18°C 18°C
When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy
key value and the intake air temperature at that time are compared to select the setting temperature automatically
according to the Fuzzy rule.
While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as in dehumi dification operation.
3) Fuzzy Operation for Heating
According to the setting temperature selected by Fuzzy rule, when the intake air temp is 3°C or more above the
setting temp, the compressor is turned off. When below the setting temp, the compressor is turned on.
Compressor ON Temp Setting Temp
Compressor OFF Temp Setting Temp+3°C
At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the in take air temp at that time.
20°C Intake Air Temp Intake Air Temp +0,5°C
Intake Air Temp < 20°C 20°C
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When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy
key value and the intake air temperature at that time are compared to select the setting temperature automatically
according to the Fuzzy rule.
While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to the in take air temperature and the setting temperature.
Airflow Speed Selection
The airflow speed of the indoor fan is set to high, medium, low, or chaos (auto) by the input of the airflow speed
selection key on the remote control.
Sleep Timer Operation
When the slepp time is reached after <1, 2, 3, 4, 5, 6, 7, 8, 9, 0 (cancel) hr > is input by the remote control while
in appliance operation, the operation of the appliance stops.
While the appliance is on pause, the sleep timer mode cannot be input.
Chaos Swing Mode
By the Chaos Swing key input at first 5 cyles the upper / lower vane swing up and down at max angle.Then the
airflow direction automatically operates with the Chaos Swing or they are fixed to the desired direction.
While in Chaos Swing mode, the angles of cooling and heating cycle operations are different.
<Cooling Mode> <Heating Mode>
Chaos Naturel Wind Mode
When the Chaos Naturel Wind mode is selected and then operated, the high, medium, or low speed of the airflow
mode is operated for 2 ~ 15 sec. randomly by the Chaos Simulation.
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Display Function
1. Heating Mode 2. Cooling Mode
Operation Indicator
Cooling, Soft Dry, Fan, Heating
Sleep Timer Indicator
Sleep Mode
IN DOOR Indicator
Timer Indicator
Defrost Indicator
Hot - start, Defrost
Led Display Indicator
IN
DOOR
Operation Indicator
Cooling, Soft Dry, Fan
Sleep Timer Indicator
Sleep Mode
IN DOOR Indicator
Timer Indicator
Compressor on Indicator
Led Display Indicator
IN
DOOR
OUTDOOR
Set Temperature (Plasma Model)
Plasma Indicator Plasma Indicator
Plasma Mode (Plasma Model) Plasma Mode (Plasma Model)
Self - diagnosis Function
Error
Code
1
Error Display LED
(Indoor body operation LED)
(once)
3 sec.
3 sec. 3 sec.
Indoor room temperature
thermistor open / short
Indoor pipe temperature
thermistor open / short
Set Temperature (Plasma Model)
Error contents SVC check point
Indoor Thermistor
assembly check
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More than
5cm
More than 2.3m
More than 10cm
More than
5cm
-14-
ø70mm
D
Left rear piping
Installation plate
B
C
A
Right rear piping
ø70mm
CHASSIS
(Grade)
A
Distance (mm)
C
B
9k, 12k 105 65 60 65
18k, 24k 105 65 260 65
D
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5) Installation guide at the seaside
CAUTION
1.
Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.
2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion
on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient performance.
3. If outdoor unit is installed close to the seaside, it should avoid direct exposure to the sea wind. Otherwise it
needs additional anticorrosion treatment on the heat exchanger.
Selecting the location(Outdoor Unit)
1) If the outdoor unit is to be installed close to the seaside, direct exposure to the sea wind should be avoided.
Install the outdoor unit on the opposite side of the sea wind direction.
Sea wind Sea wind
2) In case, to install the outdoor unit on the seaside, set up a windbreak not to be exposed to the sea wind.
Windbreak
Sea wind
3) Select a well-drained place.
1.
If you can't meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment.
2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water
• It should be strong enough like concrete to prevent
the sea wind from the sea.
• The height and width should be more than 150% of
the outdoor unit.
•It should be keep more than 70 cm of space
between outdoor unit and the windbreak for easy
air flow.
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-17-
Connecting
pipe
Connecting cable
Tape
Drain hose
Drain hose
Connecting
cable
Drain hose
Drain hose
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Piping for
passage through
piping hole
Tubing holder
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Indoor unit installation
• Remove the spacer.
• Ensure that the hooks are properly seated on the installation plate by moving it left and right.
Connecting
cable
Drain hose
Press the lower left and right sides of the unit against the
installation plate until the hooks engage into their
slots(clicking sound).
Installation Information (For left piping)
• Good case
For left piping. Follow the instruction below.
• Press on the upper side of clamp. (
)
• Bad case
• Following bending type from right to left could cause
problem of pipe damage.
• Unfold the tubing to downward slowly. ( )
• Bend the tubing to the left side of chassis.
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