LG LS-K1863HL_HM_HN / LS-K1864HL_HM_HN_BL_EL / LS-K1867HL_HM_HN / LS-K2423HL_HM_HN / LS-K2424HL_HM_HN / LS-K2465HL_HM_HN / LS-K2466HL_HM_HN_BL_EL / LS-K2665HL_HM_HN / LS-K2666HL_HM_HN_BL_EL / LS-K2669HL_HM_HN Service Manual ▷ View online
- 22 -
Display Function
1. Heating Model
2. Cooling Model
• Cooling, Soft Dry, Fan, Heating
• Cooling, Soft Dry, Fan
• Sleep Mode
• Sleep Mode
• Timer Mode
• Timer Mode
• Hot-start, Deice
Self-diagnosis Function
■
Thermistor Cut Off or Short
Cut Off/Short : Blinks on and off the operation mode LED. (0.5 sec ON/3 sec OFF)
■
Protection of the evaporator pipe from frosting
If the temperature of the indoor pipe is below 0°C after 7 minutes from starting the compressor, the compressor
and outdoor fan is stopped, and then after 3 minutes delay of operating of the compressor, when the tempera-
ture of the indoor pipe is over 7°C, the compressor and the outdoor fan is reoperated.
and outdoor fan is stopped, and then after 3 minutes delay of operating of the compressor, when the tempera-
ture of the indoor pipe is over 7°C, the compressor and the outdoor fan is reoperated.
Operation Indicator
Timer Indicator
Sleep Timer Indicator
Deicer Indicator
Operation Indicator
Timer Indicator
Sleep Timer Indicator
Compressor on Indicator
OUT
DOOR
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Installation
Read completely, then follow step by step.
1. Installation of Indoor, Outdoor unit
1) Select the best location
1. Indoor unit
■
Do not have any heat or steam near the unit.
■
Select a place where there are no obstacles in
front of the unit.
front of the unit.
■
Make sure that condensation drainage can be
conveniently routed away.
conveniently routed away.
■
Do not install near a doorway.
■
Ensure that the space around the left and right of
the unit is more than 5cm. The unit should be
installed as high on the wall as possible, allowing
a minimum of 5cm from ceiling.
the unit is more than 5cm. The unit should be
installed as high on the wall as possible, allowing
a minimum of 5cm from ceiling.
■
Use a stud finder to locate studs to prevent
unnecessary damage to the wall.
unnecessary damage to the wall.
2. Outdoor unit
■
If an awning is built over the unit to prevent direct
sunlight or rain exposure, make sure that heat
radiation from the condenser is not restricted.
sunlight or rain exposure, make sure that heat
radiation from the condenser is not restricted.
■
Ensure that the space around the back and sides
is more than 10cm. The front of the unit should
have more than 70cm of space.
is more than 10cm. The front of the unit should
have more than 70cm of space.
■
Do not place animals and plants in the path of the
warm air.
warm air.
■
Take the air conditioner weight into account and
select a place where noise and vibration are mini-
mum.
select a place where noise and vibration are mini-
mum.
■
Select a place so that the warm air and noise
from the air conditioner do not disturb neighbors.
from the air conditioner do not disturb neighbors.
■
Rooftop Installations:
If the outdoor unit is installed on a roof structure,
be sure to level the unit. Ensure the roof structure
and anchoring method are adequate for the unit
location. Consult local codes regarding rooftop
mounting.
If the outdoor unit is installed on a roof structure,
be sure to level the unit. Ensure the roof structure
and anchoring method are adequate for the unit
location. Consult local codes regarding rooftop
mounting.
2) Piping length and elevation
More than 5cm
More than 5cm
More than 2.3m
More than 5cm
More than 10cm
More than 10cm
More
than 60cm
than 60cm
More than 60cm
More than 70cm
In case more than 5m
• Capacity is based on standard length and maximum
allowance length is on the basis of reliability.
• Oil trap should be installed every 5~7 meters.
Outdoor unit
Indoor unit
A
B
A
Oil trap
Outdoor unit
Indoor unit
B
CAUTION
Install the indoor unit on the wall where the height
from the floors more than 2.3 meters.
from the floors more than 2.3 meters.
CAUTION
24K(60Hz) 5/8"
1/4"
5
15
30
30
18K(50Hz) 1/2"
1/4"
5
15
30
30
24K(50Hz) 5/8"
3/8"
5
15
30
30
26K(50Hz) 5/8"
3/8"
5
15
30
30
Pipe Size
Capacity
(Btu/h)
GAS
LIQUID
Max.
length
A
(m)
Additional
Refrigerant
(g/m)
Max.
Elevation
B
(m)
Standard
Length
(m)
- 32 -
2) Form the piping
1. Form the piping by wrapping the connecting por-
tion of the indoor unit with insulation material and
secure it with two kinds of vinyl tapes.
secure it with two kinds of vinyl tapes.
If you want to connect an additional drain hose,
the end of the drain outlet should be routed
above the ground. Secure the drain hose appro-
priately.
the end of the drain outlet should be routed
above the ground. Secure the drain hose appro-
priately.
2. In cases where the outdoor unit is installed below
the indoor unit perform the following.
Tape the piping, drain
hose and connecting
cable from down to up.
Secure the tapped
piping along the
exterior wall using
saddle or equivalent.
hose and connecting
cable from down to up.
Secure the tapped
piping along the
exterior wall using
saddle or equivalent.
Taping
Drain
hose
hose
Pipings
Connecting
cable
cable
;
;
Trap is required to prevent water
from entering into electrical parts.
from entering into electrical parts.
Seal small openings
around pipings with a
gum type sealer.
around pipings with a
gum type sealer.
3. In cases where the Outdoor unit is installed above
the Indoor unit perform the following.
Tape the piping and connecting cable from down
to up.
Secure the taped piping along the exterior wall.
Form a trap to prevent water entering the room.
Fix the piping onto the wall by saddle or equiva-
lent.
to up.
Secure the taped piping along the exterior wall.
Form a trap to prevent water entering the room.
Fix the piping onto the wall by saddle or equiva-
lent.
;
;
Seal a small opening
around the pipings
with gum type sealer.
around the pipings
with gum type sealer.
Trap
Trap
1) Checking the drainage
1. To remove the front panel from the indoor unit,
remove the front panel from the indoor unit cabi-
net.
net.
Set the air direction louvers up-and-down to the
position(horizontally) by hand.
Remove the securing screws that retain the front
panel. Pull the lower left and right sides of the
grille toward you and lift it off.
position(horizontally) by hand.
Remove the securing screws that retain the front
panel. Pull the lower left and right sides of the
grille toward you and lift it off.
Pull the right and
the left side.
the left side.
Screw
2. To check the drainage.
Pour a glass of water
on the evaporator.
Ensure the water flows
through the drain hose
of the indoor unit with-
out any leakage and
goes out the drain exit.
on the evaporator.
Ensure the water flows
through the drain hose
of the indoor unit with-
out any leakage and
goes out the drain exit.
3. Drain piping
The drain hose should point downward for easy
drain flow.
drain flow.
Do not make drain piping.
Downward slope
Do not raise
Accumulated
drain water
drain water
Tip of drain hose
dipped in water
dipped in water
Air
Waving
Water
leakage
leakage
Water
leakage
leakage
Ditch
Less than
50mm gap
50mm gap
Water
leakage
leakage
4. Checking the Drainage and Forming the Pipings
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1) Air purging
Air and moisture remaining in the refrigerant system
have undesirable effects as indicated below.
have undesirable effects as indicated below.
■
Pressure in the system rises.
■
Operating current rises.
■
Cooling(or heating) efficiency drops.
■
Moisture in the refrigerant circuit may freeze and
block capillary tubing.
block capillary tubing.
■
Water may lead to corrosion of parts in the refrig-
eration system.
eration system.
Therefore, the indoor unit and tubing between the
indoor and outdoor unit must be leak tested and
evacuated to remove any noncondensables and
moisture from the system.
indoor and outdoor unit must be leak tested and
evacuated to remove any noncondensables and
moisture from the system.
2) Air purging with vacuum pump
1. Preparation
■
Check that each tube(both liquid and gas side tubes)
between the indoor and outdoor units have been properly
connected and all wiring for the test run has been com-
pleted. Remove the service valve caps from both the gas
and the liquid side on the outdoor unit. Note that both the
liquid and the gas side service valves on the outdoor unit
are kept closed at this stage.
between the indoor and outdoor units have been properly
connected and all wiring for the test run has been com-
pleted. Remove the service valve caps from both the gas
and the liquid side on the outdoor unit. Note that both the
liquid and the gas side service valves on the outdoor unit
are kept closed at this stage.
2. Leak test
■
Connect the manifold valve(with pressure
gauges) and dry nitrogen gas cylinder to this ser-
vice port with charge hoses.
gauges) and dry nitrogen gas cylinder to this ser-
vice port with charge hoses.
■
Pressurize the system to no more than 150
P.S.I.G. with dry nitrogen gas and close the cylin-
der valve when the gauge reading reached 150
P.S.I.G. Next, test for leaks with liquid soap.
P.S.I.G. with dry nitrogen gas and close the cylin-
der valve when the gauge reading reached 150
P.S.I.G. Next, test for leaks with liquid soap.
Lo
Hi
Indoor unit
Outdoor unit
Manifold valve
Charge hose
Nitrogen gas
cylinder(in vertical
standing position)
cylinder(in vertical
standing position)
Pressure
gauge
gauge
■
Do a leak test of all joints of the tubing(both
indoor and outdoor) and both gas and liquid side
service valves.
Bubbles indicate a leak. Be sure to wipe off the
soap with a clean cloth.
indoor and outdoor) and both gas and liquid side
service valves.
Bubbles indicate a leak. Be sure to wipe off the
soap with a clean cloth.
■
After the system is found to be free of leaks,
relieve the nitrogen pressure by loosening the
charge hose connector at the nitrogen cylinder.
When the system pressure is reduced to normal,
disconnect the hose from the cylinder.
relieve the nitrogen pressure by loosening the
charge hose connector at the nitrogen cylinder.
When the system pressure is reduced to normal,
disconnect the hose from the cylinder.
Be sure to use a manifold valve for air purging.
If it is not available, use a stop valve for this purpose.
The "Hi" knob of the manifold valve must always be
kept close.
If it is not available, use a stop valve for this purpose.
The "Hi" knob of the manifold valve must always be
kept close.
To avoid nitrogen entering the refrigerant system in
a liquid state, the top of the cylinder must be higher
than its bottom when you pressurize the system.
Usually, the cylinder is used in a vertical standing
position.
a liquid state, the top of the cylinder must be higher
than its bottom when you pressurize the system.
Usually, the cylinder is used in a vertical standing
position.
CAUTION
CAUTION
5. Air Purging
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