DOWNLOAD LG LS-H076QLL0 / LS-H096QLL1 / S07LHP Service Manual ↓ Size: 3.8 MB | Pages: 68 in PDF or view online for FREE

• Connect the charge hose end described in the pre-

ceding steps to the vacuum pump to evacuate the
tubing and indoor unit.
Confirm the "Lo" knob of the manifold valve is
open. Then, run the vacuum pump.
The operation time for evacuation varies with tub-
ing length and capacity of the pump. The following
table shows the time required for evacuation.

• When the desired vacuum is reached, close the

"Lo" knob of the manifold valve and stop the vacu-
um pump.

• With a service valve wrench, turn the valve stem of

liquid side valve counter-clockwise to fully open
the valve.

• Turn the valve stem of gas side valve counter-

clockwise to fully open the valve.

• Loosen the charge hose connected to the gas side

service port slightly to release the pressure, then
remove the hose.

• Replace the flare nut and its bonnet on the gas

side service port and fasten the flare nut securely
with an adjustable wrench. This process is very
important to prevent leakage from the system.

• Replace the valve caps at both gas and liquid side

service valves and fasten them tight.

This completes air purging with a vacuum pump. 
The air conditioner is now ready to test run.

(1) Remove the caps from the 2-way and 3-way

valves.

(2) Remove the service-port cap from the 3-way valve.
(3) To open the 2-way valve turn the valve stem coun-

terclockwise approximately 90°, wait for about 2~3
sec, and close it.

(4) Apply a soap water or a liquid neutral detergent on

the indoor unit connection or outdoor unit connec-
tions by a soft brush to check for leakage of the
connecting points of the piping.

(5) If bubbles come out, the pipes have leakage.

Required time for evacuation when 30 gal/h vacuum pump is

used

10 min. or more

15 min. or more

If tubing length is less than 10m 

(33 ft)

if tubing length is longer than 10m

(33 ft)

Gas side

Liquid side

Cap

Hexagonal wrench

2-way valve

(Open)

3-way valve

(Close)

Indoor unit

Outdoor unit

Lo

Hi

Manifold valve

Vacuum pump

Pressure 
gauge

Open

Close

1. Check that all tubing and wiring have been properly

connected.

2. Check that the gas and liquid side service valves are

fully open.

1. Remove the battery cover 

by pulling it according to the
arrow direction.

2. Insert new batteries making 

sure that the (+) and (–) of 
battery are installed correctly.

3. Reattach the cover by

pushing it back into position.

• Use 2 AAA(1.5volt) batteries. Do not use

rechargeable batteries.

• Remove the batteries from the remote

control if the system is not going to be
used for a long time.

• Anchor the outdoor unit with a bolt and

nut(ø10mm) tightly and horizontally on a concrete
or rigid mount.

• When installing on the wall, roof or rooftop, anchor

the mounting base securely with a nail or wire
assuming the influence of wind and earthquake.

• In the case when the vibration of the unit is con-

veyed to the hose, secure the unit with an anti-
vibration bushing.

Operate unit for 15~20 minutes, then check the system
refrigerant charge:
1. Measure the pressure of the gas side service valve.
2. Measure the temperature of the intake and discharge

of air.

3. Ensure the difference between the intake tempera-

ture and the discharge is more than 8°C(46°F)
(Cooling) or (Heating).

4. For reference; the gas side pressure of optimum

condition is as below.(Cooling)

If the actual pressure is higher than shown,
the system is most likely over-charged, and
charge should be removed. If the actual pres-
sure are lower than shown, the system is
most likely undercharged, and charge should
be added.

The air conditioner is now ready for use.

Bolt

Tubing connection

Discharge 

temperature

Discharge air

Intake temperature

R-22

35°C (95°F)

4~5kg/cm

2

G(56.8~71.0 P.S.I.G.)

R-410A

35°C (95°F)

8.5~9.5kg/cm

2

G(120~135 P.S.I.G.)

Outside ambient

TEMP.

Refrigerant

The pressure of the gas side 

service valve.

This is performed when the unit is to be relocated
or the refrigerant circuit is serviced.
Pump Down means collecting all refrigerant in the
outdoor unit without loss in refrigerant gas.

CAUTION:
Be sure to perform Pump Down procedure with the
unit cooling mode.

Pump Down Procedure
1. Connect a low-pressure gauge manifold hose to

the charge port on the gas side service valve.

2. Open the gas side service valve halfway and purge

the air from the manifold hose using the refrigerant
gas.

3. Close the liquid side service valve(all the way in).
4. Turn on the unit's operating switch and start the

cooling operation.

5. When the low-pressure gauge reading becomes 1

to 0.5kg/cm2 G(14.2 to 7.1 P.S.I.G.), fully close the
gas side valve stem and then quickly turn off the
unit. At that time, Pump Down has been completed
and all refrigerant gas will have been collected in
the outdoor unit.

• On while in appliance operation, off while in appliance pause

• ON while in sleep timer mode, OFF when sleep timer cancel or appliance operation pause.

• On while in timer mode (on/off) and in sleep timer mode, off when timer mode is completed or canceled.

• While in appliance operation, on while in outdoor unit compressor running, off while in compressor off

• On while in plasma mode, off while plasma mode is canceled.

• On while auto restart mode, off while auto restart mode is canceled.

• In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate

procedures automatically to the previous operating conditions.
If your want to use this operation, press the Auto Restart Button.

• Operation starts, when this button is pressed and stops when you press the button again.

• On while in appliance operation, off while in appliance pause

• ON while in sleep timer mode, OFF when sleep timer cancel or appliance operation pause.

• On while in timer mode (on/off) and in sleep timer mode, off when timer mode is completed or canceled

• Off except when hot start during heating mode operation or while in defrost control.

• On while in plasma mode, off while plasma mode is canceled.

• On while auto restart mode, off while auto restart mode is canceled.

• In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate

procedures automatically to the previous operating conditions.
If your want to use this operation, press the Auto Restart Button.

• Operation starts, when this button is pressed and stops when you press the button again.

■

• When the intake air temperature reaches 0.5°C below the setting temp, the compressor and the outdoor fan stop.  

• When it reaches 0.5°C above the setting temp, they start to operate again.

Compressor ON Temp=> Setting Temp+0.5°C

Compressor OFF Temp => Setting Temp-0.5°C

• While in compressor running, operating with the airflow speed set by the remote controller. While in compressor

not running, operating with the low airflow speed regardless of the setting.

■

Healthy Dehumidification Mode

• When the dehumidification operation input by the remote controller is received, the intake air temperature is

detected and the setting temp is automatically set according to the intake air temperature.

26°C 

≤

Intake Air Temp              => 25°C

24°C 

≤

Intake Air Temp < 26°C => Intake Air Temp-1°C

18°C 

≤

Intake Air Temp < 24°C => Intake Air Temp-0.5°C

Intake Air Temp < 18°C                   => 18°C

• While in compressor off, the indoor fan repeats low airflow 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 +3°Cabove 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 

• While in compressor on, the indoor fan is off when the indoor pipe temp. is below 26®¨C , when above 28°C , it

operates with the low or setting airflow speed (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

operates with the low airflow speed.

• If overloaded while in heating mode operation, in order to prevent the compressor from OLP operation, the out-

door 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.

■

• While in heating mode operation in order to protect the evaporator pipe of outdoor unit from freezing, reversed

to cooling cycle to defrost the evaporator pipe of the outdoor unit.

• Defrost control is available 30 minutes later since heating mode operation started, and it will not polong over 6

minutes.

• Deicing starts only when the outdoor pipe temperature falls below -6°C after 30 minutes passed from starting of

heating operating and more than 10 minutes operation of compressor.

• Deicing ends after 6 minutes passed from starting of deice operation or when the outdoor pipe temperature rises

over 12°C even if before 6 minutes.