LG LS-H076QLL0 / LS-H096QLL1 / S07LHP Service Manual ▷ View online
Service Manual 21
Installation
• Connect the cable to the indoor unit by connecting the wires to the terminals on the control board in
dividually according to the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit and
the terminal No. are the same as those of the indoor unit.)
The earth wire should be longer than the common wires.
the terminal No. are the same as those of the indoor unit.)
The earth wire should be longer than the common wires.
Air
Conditioner
Main power source
Circuit Breaker
Use a circuit
breaker or time
delay fuse.
Use a circuit
breaker or time
delay fuse.
NORMAL
CROSS-SECTIONAL
AREA 0.75mm
CROSS-SECTIONAL
AREA 0.75mm
2
CAUTION
The power connecting cable connected to
the indoor and outdoor unit should be
complied with the following specifications
(Type "B" approved by HAR or SAA).
the indoor and outdoor unit should be
complied with the following specifications
(Type "B" approved by HAR or SAA).
The power cord connected to the "A" unit
should be complied with the following
specifications(Type "B" approved by HAR or
SAA).
should be complied with the following
specifications(Type "B" approved by HAR or
SAA).
7k~14k
18k
24k~28k
30k, 32k
36k, 38k
1.0
1.5
2.5
2.5
5.5
Unit(A)
Indoor
Indoor
Indoor
Outdoor
Outdoor
Cable Type(B) H05VV-F H05VV-F H05VV-F H05RN-F H05RN-F
NORMAL CROSS
-SECTIONAL AREA
Grade
7k~14k
18k
24k~28k
1.0
1.5
2.5
Cable Type(B) H07RN-F H07RN-F H07RN-F
NORMAL
CROSS
-SECTIONAL
AREA
Grade
30k, 32k
36k, 38k
0.75
0.75
Cable Type(B) H07RN-F H07RN-F
NORMAL CROSS
-SECTIONAL AREA
Grade
(mm
2
)
(mm
2
)
(mm
2
)
CAUTION:
• The above circuit diagram is subject to change
without notice.
• Be sure to connect wires according to the wiring
diagram.
• Connect the wires firmly, so that not to be pulled
out easily.
• Connect the wires according to color codes by
referring the wiring diagram.
• When installing, refer to the circuit diagram on the
Control Box of Indoor Unit.
• When installing, refer to the wiring diagram on the
Control Cover Inside Outdoor Unit.
Connect the Cable to the Indoor Unit.
CAUTION:
If a power plug is not to be used, provide a circuit
breaker between power source and the unit as shown
below.
breaker between power source and the unit as shown
below.
22 Room Air Conditioner
Installation
1. Remove the control cover from the unit by loos-
ening the screw.
Connect the wires to the terminals on the control
board individually.
Connect the wires to the terminals on the control
board individually.
2. Secure the cable onto the control board with the
cord clamp.
3. Refix the control cover to the original position
with the screw.
4. Use a recognized circuit breaker "A"
between the power source and the unit.
A disconnecting device to adequately disconnect
all supply lines must be fitted.
A disconnecting device to adequately disconnect
all supply lines must be fitted.
Terminal block
Over 5mm
Cover control
Connecting cable
Connecting cable
CAUTION: After the confirmation of the above conditions, prepare the wiring as
follows:
follows:
1) Never fail to have an individual power circuit specifically for the air conditioner. As for the method of wiring,
be guided by the circuit diagram posted on the inside of control cover.
2) The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations
to which the unit is subjected during the course of transportation. Check them and make sure that they are
all tightly fastened. (If they are loose, it could cause burn-out of the wires.)
all tightly fastened. (If they are loose, it could cause burn-out of the wires.)
3) Specification of power source.
4) Confirm that electrical capacity is sufficient.
5) See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the
4) Confirm that electrical capacity is sufficient.
5) See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the
name plate.
6) Confirm that the cable thickness is as specified in the power source specification.
(Particularly note the relation between cable length and thickness. (Refer to page 28))
7) Always install an earth leakage circuit breaker in a wet or moist area.
8) The following would be caused by voltage drop.
8) The following would be caused by voltage drop.
• Vibration of a magnetic switch, which will damage the contact point, fuse breaking, disturbance of the normal func-
tion of the overload.
9) The means for disconnection from a power supply shall be incorporated in the fixed wiring and have an air
gap contact separation of at least 3mm in each active(phase) conductors.
Outdoor Unit
7k~14k
18k
24k~28k 30k, 32k 36k, 38k
15
20
30
30
40
Circuit
Breaker
(A)
Grade
Connect the Cable to the Outdoor Unit
Service Manual 23
Installation
Checking the Drainage
Form the Piping
1. To remove the front panel from the indoor unit.
• 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.
grille toward you and lift it off.
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 without any leakage and goes out
the drain exit.
the drain exit.
3. Drain piping
• The drain hose should point downward for easy
drain flow.
• Do not make drain piping.
1. Form the piping by wrapping the connecting
portion of the indoor unit with insulation materi-
al and secure it with two kinds of vinyl tapes.
al and 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 appropriately.
the ground. Secure the drain hose appropriately.
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.
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.
Pull the right and
the left side.
the left side.
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.
Seal a small opening
around the pipings
with gum type sealer.
around the pipings
with gum type sealer.
Trap
Trap
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
24 Room Air Conditioner
Installation
CAUTION:
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.
pressurize the system. Usually, the cylinder is used
in a vertical standing position.
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.
• Water may lead to corrosion of parts in the refrig-
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.
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 completed. 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.
been properly connected and all wiring for the test
run has been completed. 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 service port
with charge hoses.
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.
der valve when the gauge reading reached 150
P.S.I.G. Next, test for leaks with liquid soap.
• 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.
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.
charge hose connector at the nitrogen cylinder.
When the system pressure is reduced to normal,
disconnect the hose from the cylinder.
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
CAUTION:
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.
valve must always be kept close.
Air Purging
Air Purging with Vacuum Pump
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