LG ABUQ18GHLA0 Instruction sheet

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INSTALLATION MANUAL
AIR CONDITIONER
• Please read this installation manual completely before installing the product.
• Installation work must be performed in accordance with the national wiring
standards by authorized personnel only.
• Please retain this installation manual for future reference after reading it
thoroughly.
P/NO : MFL67448509

Single A Air Conditioner Installation Manual
CONTENTS
Safety Precautions ..............................................................................................3
Installation of Outdoor Unit................................................................................6
Wiring Connection...............................................................................................9
Connecting Pipes ..............................................................................................12
Leakage test and Evacuation ...........................................................................15
Test running .......................................................................................................17
Function..............................................................................................................19
Self-diagnosis Function....................................................................................20
Installation Guide at the Seaside .....................................................................21
2Air Conditioner

To prevent the injury of the user or other people and property damage, the following instructions
must be followed.
nBe sure to read before installing the air conditioner.
nBe sure to observe the cautions specified here as they include important items related to safety.
nIncorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
nThe meanings of the symbols used in this manual are as shown below.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
nInstallation
Be sure not to do.
Be sure to follow the instruction.
Safety Precautions
Always perform grounding.
• Otherwise, it may cause electri-
cal shock.
Donʼt use a power cord, a
plug or a loose socket which
is damaged.
• Otherwise, it may cause a fire
or electrical shock.
For installation of the product,
always contact the service cen-
ter or a professional installation
agency.
• Otherwise, it may cause a fire, elec-
trical shock, explosion or injury.
Securely attach the electrical
part cover to the indoor unit
and the service panel to the
outdoor unit.
•
If the electrical part cover of the indoor
unit and the service panel of the out-
door unit are not attached securely, it
could result in a fire or electric shock
due to dust, water, etc.
Always install an air leakage
breaker and a dedicated
switching board.
• No installation may cause a fire
and electrical shock.
Do not keep or use flammable
gases or combustibles near
the air conditioner.
• Otherwise, it may cause a fire
or the failure of product.
Ensure that an installation frame of the out-
door unit is not damaged due to use for a long
time.
• It may cause injury or an accident.
Do not disassemble or repair the product ran-
domly.
• It will cause a fire or electrical shock.
Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not com-
press air or Oxygen and do not use Flammable gases. Otherwise, it may cause fire or explosion.
• There is the risk of death, injury, fire or explosion.
Installation Manual 3
Safety Precautions

4Air Conditioner
Safety Precautions
Do not install the product at a place that there
is concern of falling down.
• Otherwise, it may result in personal injury.
Use caution when unpacking and installing.
• Sharp edges may cause injury.
Take the power plug out if
necessary, holding the head
of the plug and do not touch
it with wet hands.
• Otherwise, it may cause a fire
or electrical shock.
Do not use the power cord
near the heating tools.
• Otherwise, it may cause a fire
and electrical shock.
Do not open the suction
inlet of the indoor/outdoor
unit during operation.
• Otherwise, it may electrical
shock and failure.
Do not allow water to run
into electrical parts.
• Otherwise, it may cause the
failure of machine or electrical
shock.
Hold the plug by the head
when taking it out.
• It may cause electric shock
and damage.
Never touch the metal parts
of the unit when removing
the filter.
• They are sharp and may
cause injury.
Do not share the outlet with
other appliances.
• It will cause an electric shock
or a fire due to heat genera-
tion.
Do not use the damaged
power cord.
• Otherwise, it may cause a fire
or electrical shock.
Do not modify or extend the
power cord randomly.
• Otherwise, it may cause a fire
or electrical shock.
Take care so that the power
cord may not be pulled dur-
ing operation.
• Otherwise, it may cause a fire
or electrical shock.
Unplug the unit if strange
sounds, smell, or smoke
comes from it.
• Otherwise, it may cause elec-
trical shock or a fire.
Keep the flames away.
• Otherwise, it may cause a fire.
Do not step on the indoor/outdoor unit and
do not put anything on it.
• It may cause an injury through dropping of the
unit or falling down.
Do not place a heavy object on the power
cord.
• Otherwise, it may cause a fire or electrical
shock.
When the product is submerged into water,
always contact the service center.
• Otherwise, it may cause a fire or electrical
shock.
Take care so that children may not step on
the outdoor unit.
• Otherwise, children may be seriously injured
due to falling down.
nOperation

Installation Manual 5
Safety Precautions
nInstallation
Install the drain hose to ensure that drain
can be securely done.
• Otherwise, it may cause water leakage.
Install the product so that the noise or hot
wind from the outdoor unit may not cause
any damage to the neighbors.
• Otherwise, it may cause dispute with the neigh-
bors.
Always inspect gas leakage after the instal-
lation and repair of product.
• Otherwise, it may cause the failure of product.
Keep level parallel in installing the product.
• Otherwise, it may cause vibration or water
leakage.
Avoid excessive cooling and perform venti-
lation sometimes.
• Otherwise, it may do harm to your health.
Use a soft cloth to clean. Do not use wax,
thinner, or a strong detergent.
• The appearance of the air conditioner may
deteriorate, change color, or develop surface
flaws.
Do not use an appliance for special purposes
such as preserving animals vegetables, pre-
cision machine, or art articles.
• Otherwise, it may damage your properties.
Do not place obstacles around the flow inlet
or outlet.
• Otherwise, it may cause the failure of appli-
ance or an accident.
nOperation

1. Installation Places
• 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.
• Ensure that the spaces indicated by arrows
around front, back and side of the unit.
• Do not place animals and plants in the path of
the warm air.
• Take the air conditioner weight into account and
select a place where noise and vibration are min-
imum.
• Select a place so that the warm air and noise
from the air conditioner do not disturb neighbors.
More than
300mm
Fence or
obstacles
More than 700mm
More than 600mm
More than
More than
300mm
300mm
More than
300mm
Sunroof
Installation of Outdoor Unit
Installation of Outdoor Unit
2. Piping length and the elevation
6Air Conditioner
Unit : mm
FREE JOINT SINGLE OUTDOOR
Ceiling Cassette
Model Capacity
Pipe Size Length A(m) Elevation B(m) Additional
Refrigerant
(g/m)
Gas Liquid Standard Max. Standard Max.
AUUQ18GH1 5kW Ø12.7(1/2) Ø6.35(1/4) 7.5 30 5 15 20
AUUQ21GH1 6kW Ø12.7(1/2) Ø6.35(1/4) 7.5 30 5 15 20
AUUQ24GH1 7kW Ø15.88(5/8) Ø9.52(3/8) 7.5 50 5 30 40
AUUQ36GH1 10kW Ø15.88(5/8) Ø9.52(3/8) 7.5 50 5 30 40
AUUQ42GH1 12.5kW Ø15.88(5/8) Ø9.52(3/8) 7.5 50 5 30 40
AUUQ48GH1 13.4kW Ø15.88(5/8) Ø9.52(3/8) 7.5 50 5 30 40
AUUQ54GH1 15.8kW Ø19.05(3/4) Ø9.52(3/8) 7.5 50 5 30 40
Model Capacity
Pipe Size Length A(m) Elevation B(m) Additional
Refrigerant
(g/m)
Gas Liquid Standard Max. Standard Max.
ATUQ18GPLE3 5kW Ø12.7(1/2) Ø6.35(1/4) 7.5 30 5 15 20
ATUQ21GPLE3 6kW Ø12.7(1/2) Ø6.35(1/4) 7.5 30 5 15 20
ATUQ24GNLE3 7kW Ø15.88(5/8) Ø9.52(3/8) 7.5 50 5 30 40
ATUQ36GMLE3 10kW Ø15.88(5/8) Ø9.52(3/8) 7.5 50 5 30 40
ATUQ42GMLE3 12.5kW Ø15.88(5/8) Ø9.52(3/8) 7.5 50 5 30 40
ATUQ48GMLE3 13.4kW Ø15.88(5/8) Ø9.52(3/8) 7.5 50 5 30 40
ATUQ54GMLE3 15.8kW Ø19.05(3/4) Ø9.52(3/8) 7.5 50 5 30 40

Installation Manual 7
Installation of Outdoor Unit
Ceiling Suspended Air conditioner
Ceiling Concealed Duct
Ceiling Concealed Duct – Low static
Model Capacity
Pipe Size Length A(m) Elevation B(m) Additional
Refrigerant
(g/m)
Gas Liquid Standard Max. Standard Max.
AVUQ18GJLA0 5kW Ø12.7(1/2) Ø6.35(1/4) 7.5 30 5 15 20
AVUQ21GJLA0 6kW Ø12.7(1/2) Ø6.35(1/4) 7.5 30 5 15 20
AVUQ24GJLA0 7kW Ø15.88(5/8) Ø9.52(3/8) 7.5 50 5 30 40
AVUQ36GKLA0 10kW Ø15.88(5/8) Ø9.52(3/8) 7.5 50 5 30 40
AVUQ42GLLA0 12.5kW Ø15.88(5/8) Ø9.52(3/8) 7.5 50 5 30 40
AVUQ48GLLA0 13.4kW Ø15.88(5/8) Ø9.52(3/8) 7.5 50 5 30 40
AVUQ54GLLA0 15.8kW Ø19.05(3/4) Ø9.52(3/8) 7.5 50 5 30 40
Model Capacity
Pipe Size Length A(m) Elevation B(m) Additional
Gas Liquid Standard Max. Standard Max. (g/m)
ABUQ18GHLA0
ABUQ18GL2A0 5kW Ø12.7(1/2) Ø6.35(1/4) 7.5 30 5 15 20
ABUQ21GHLA0
ABUQ21GL2A0 6kW Ø12.7(1/2) Ø6.35(1/4) 7.5 30 5 15 20
ABUQ24GGLA0
ABUQ24GL3A0 7kW Ø15.88(5/8) Ø9.52(3/8) 7.5 50 5 30 40
ABUQ36GGLA0 10kW Ø15.88(5/8) Ø9.52(3/8) 7.5 50 5 30 40
ABUQ42GRLA0 12.5kW Ø15.88(5/8) Ø9.52(3/8) 7.5 50 5 30 40
ABUQ48GRLA0 13.4kW Ø15.88(5/8) Ø9.52(3/8) 7.5 50 5 30 40
ABUQ54GRLA0 15.8kW Ø19.05(3/4) Ø9.52(3/8) 7.5 50 5 30 40

Installation of Outdoor Unit
8Air Conditioner
Night Silent Operation setting
1. Open the Side panel or Top Cover of outdoor unit.
2. Set the SW01N.
3. Close the Side panel or Top Cover.
6
SW01N
SW01N
DIP_SW
AUUQ36GH1
(ATUQ36GMLE3)
(AVUQ36GKLA0)
(ABUQ36GGLA0)
AUUQ18GH1 /AUUQ21GH1/ AUUQ24GH1
(ATUQ18GPLE3/ ATUQ21GPLE3/ ATUQ24GNLE3)
(AVUQ18GJLA0/ AVUQ21GJLA0 / AVUQ24GJLA0)
(ABUQ18GHLA0/ ABUQ21GHLA0/ ABUQ24GGLA0)
(ABUQ18GL2A0/ ABUQ21GL2A0/ ABUQ24GL3A0)
AUUQ42GH1/ AUUQ48GH1/ AUUQ54GH1
(ATUQ42GMLE3/ ATUQ48GMLE3/ ATUQ54GMLE3)
(AVUQ42GLLA0/ AVUQ48GLLA0/ AVUQ54GLLA0)
(ABUQ42GRLA0/ ABUQ48GRLA0/ ABUQ54GRLA0)
6
AUUQ36GH1
(ATUQ36GMLE3)
(AVUQ36GKLA0)
(ABUQ36GGLA0)
AUUQ18GH1 /AUUQ21GH1/ AUUQ24GH1
(ATUQ18GPLE3/ ATUQ21GPLE3/ ATUQ24GNLE3)
(AVUQ18GJLA0/ AVUQ21GJLA0 / AVUQ24GJLA0)
(ABUQ18GHLA0/ ABUQ21GHLA0/ ABUQ24GGLA0)
(ABUQ18GL2A0/ ABUQ21GL2A0/ ABUQ24GL3A0)
AUUQ42GH1/ AUUQ48GH1/ AUUQ54GH1
(ATUQ42GMLE3/ ATUQ48GMLE3/ ATUQ54GMLE3)
(AVUQ42GLLA0/ AVUQ48GLLA0/ AVUQ54GLLA0)
(ABUQ42GRLA0/ ABUQ48GRLA0/ ABUQ54GRLA0)
If installed tube is shorter than 7.5 m, additional charging is not necessary.
Additional Refrigerant = (A -7.5) x Additional refrigerant (g)
CAUTION:
• Capacity is based on standard length and maximum allowance length is on the
basis of reliability.
• Improper refrigerant charge may result in abnormal cycle.
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B

Wiring Connection
Wiring Connection
Electrical Wiring
Outdoor
Indoor
Main
power source Switch box
ELCB
Perform the electrical wiring work according to the electrical wiring connection.
• All wiring must comply with local requirements.
•
Select a power source that is capable of supply-
ing the current required by the air conditioner.
• Use a recognized ELCB(Electric Leakage Cir-
cuit Breaker) between the power source and
the unit. A disconnection device to adequately
disconnect all supply lines must be fitted.
• Model of circuit breaker recommended by
authorized personnel only
Installation Manual 9
Connecting Cables between Indoor Unit and Outdoor Unit
Outdoor
unit Indoor unit
1
2
3
1
2
3
Model Phase(Ø) ELCB
AUUQ18GH1
(ATUQ18GPLE3) (AVUQ18GJLA0) (ABUQ18GHLA0) (ABUQ18GL2A0) 1
20A
AUUQ21GH1
(ATUQ21GPLE3) (AVUQ21GJLA0) (ABUQ21GHLA0) (ABUQ21GL2A0) 1
AUUQ24GH1
(ATUQ24GNLE3) (AVUQ24GJLA0) (ABUQ24GGLA0) (ABUQ24GL3A0) 1 25A
AUUQ36GH1
(ATUQ36GMLE3) (AVUQ36GKLA0)(ABUQ36GGLA0) 1 30A
AUUQ42GH1
(ATUQ42GMLE3) (AVUQ42GLLA0) (ABUQ42GRLA0) 1
40A
AUUQ48GH1
(ATUQ48GMLE3) (AVUQ48GLLA0) (ABUQ48GRLA0) 1
AUUQ54GH1
(ATUQ54GMLE3) (AVUQ54GLLA0) (ABUQ54GRLA0) 1

Wiring Connection
10 Air Conditioner
The power cord connected to the outdoor unit should be complied
withIEC 60245 or HD 22.4 S4 (This equipment shall be provided with a
cord set complying with the national regulation.
The connecting cable connected to the outdoor unit should be
complied with IEC 60245 or HD 22.4 S4 (This equipment shall be
provided with a cord set complying with the national regulation.)
If the supply cord is damaged, it must be replaced by a special cord or assembly availible from the manufacturer of its service agent.
CAUTION
NORMAL
CROSS-SECTIONAL
AREA 0.75mm
2
When the connection line between the indoor unit and
outdooor unit is over 40m, connect the telecommunication
line and power line separately.
20mm
GN/YL
35±5mm
10±3mm
GN/YL
20mm
35±5mm
10±3mm
• For wiring, use the designated power wire and connect firmly, then secure to prevent outside pres-
sure being exerted on the terminal block.
• Use an appropriate screwdriver for tightening the terinal screws. A screwdriver with a small head
will strip the head and make proper tighterning impossible.
• Over-tightening the terminal screws may break them.
When none are available, follow the instructions below.
• Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power
wiring may cause abnormal heat.)
• When connecting wiring which is the same thickness, do as shown in the figure below.
u Precautions when laying power wiring
Round pressure terminal Power wire
Use round pressure terminals for connections to the power terminal block.
Model Phase(Ø) Area(mm2)
AUUQ18GH1/AUUQ21GH1/AUUQ24GH1
(ATUQ18GPLE3/ATUQ21GPLE3/ATUQ24GNLE3)
(AVUQ18GJLA0/AVUQ21GJLA0/AVUQ24GJLA0)
(ABUQ18GHLA0/ABUQ21GHLA0/ABUQ24GGLA0)
(ABUQ18GL2A0/ABUQ21GL2A0/ABUQ24GL3A0)
12.5
AUUQ36GH1/AUUQ42GH1/AUUQ48GH1/AUUQ54GH1
(ATUQ36GMLE3/ATUQ42GMLE3/ATUQ48GMLE3/ATUQ54GMLE3)
(AVNQ36GKLA0/AVNQ42GLLA0/AVNQ48GLLA0/AVNQ54GLLA0)
(ABUQ36GGLA0/ABUQ42GRLA0/ABUQ48GRLA0/ABUQ54GRLA0)
16

Wiring Connection
CAUTION:
• The circuit diagram is not 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.
Connecting cable terminal
Power cord terminal
Cord clamp
* Make sure the rubber bushes are
properly used in knock-out holes after
connecting main power.
• Remove the side panel for wiring connection.
• Use the cord clamp to fix the cord.
• Earthing work
- Connect the cable of diameter more to the earthing terminal provided in the control
box and do earthing.
Connecting the cable to Outdoor Unit
Installation Manual 11
CAUTION:
• The Power cord connected to the unit should be selected according to the following
specifications.

Connecting Pipes
12 Air Conditioner
Connecting Pipes
Preparation of Piping
Main cause of gas leakage is defect in flaring
work. Carry out correct flaring work in the fol-
lowing procedure.
Cut the pipes and the cable.
• Use the accessory piping kit or the pipes
purchased locally.
• Measure the distance between the indoor
and the outdoor unit.
• Cut the pipes a little longer than measured
distance.
•
Cut the cable 1.5m longer than the pipe
length.
Burrs removal
• Completely remove all burrs from the cut
cross section of pipe/tube.
•
Put the end of the copper tube/pipe to down-
ward direction as you remove burrs in order to
avoid to let burrs drop in the tubing.
Putting nut on
• Remove flare nuts attached to indoor and
outdoor units, than put them on pipe/tube
having completed burr removal.
(Not possible to put them on after flaring work)
Flaring work
• Carry out flaring work using dedicated flar-
ing tool for R-410A as shown below.
Firmly hold copper tube in a bar(or die) as
indicated dimension in the table above.
Check
• Compare the flared work with figure below.
• If flare is noted to be defective, cut off the
flared section and do flaring work again.
Outside diameter "A"
mm inch mm
Ø6.35 1/4 1.1~1.3
Ø9.52 3/8 1.5~1.7
Ø12.7 1/2 1.6~1.8
Ø15.88 5/8 1.6~1.8
Ø19.05 3/4 1.9~2.1
Copper
tube
90 Slanted Uneven Rough
Pipe
Reamer
Point down
Flare nut
Copper tube
Bar
Copper pipe
Clamp handle Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Inclined
Inside is shining without scratches
Smooth all round
Even length
all round
Surface
damaged Cracked Uneven thickness
= Improper flaring =

Connecting Pipes
Preventing foreign objects from entering
• Plug the pipe through-holes with putty or insula-
tion material(procured locally)to stop up all gaps.
Gas side piping
Liquid side piping
Drain hose
Connecting wire
• Align the center of the piping and sufficiently
tighten the flare nut by hand.
• Finally, tighten the flare nut with torque wrench
until the wrench clicks.
- When tightening the flare nut with torque
wrench, ensure the direction for tightening
follows the arrow on the wrench.
hWhen tighten the pipe, hold the haxagonal
body.
mm inch N.m
Ø6.35 1/4 16±2
Ø9.52 3/8 38±4
Ø12.7 1/2 55±6
Ø15.88 5/8 75±7
Ø19.05 3/4 110±10
Outside diameter Torque
Torque
wrench
Contin
-uous
Connecting the pipes to the Outdoor unit
Installation Manual 13
CAUTION:
Insects or small animals entering the
outdoor unit may cause a short circuit
in the electrical box.

Connecting Pipes
Forming the piping
Form the piping by wrapping the
connecting portion of the indoor
unit with insulation material and
secure it with two kinds of vinyl
tape.
• 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.
In cases where the outdoor unit is
installed below the indoor unit per-
form the following.
1. Tape the piping, drain hose and connecting
cable from down to up.
2. Secure the tapped piping along the exteri-
or wall using saddle or equivalent.
In cases where the outdoor unit is
installed above the indoor unit per-
form the following.
1. Tape the piping and connecting cable from
down to up.
2. Secure the taped piping along the exterior
wall. Form a trap to prevent water entering
the room.
3. Fix the piping onto the wall by saddle or
equivalent.
Trap
Plastic
band
Seal a small
opening around
the pipings with
gum type sealer.
TrapTrapTrap
Seal a small openingSeal a small opening
around the pipingsaround the pipings
with gum type sealer.with gum type sealer.
Seal a small opening
around the pipings
with gum type sealant.
14 Air Conditioner
• Trap is required to prevent water from entering
into electrical parts.
Taping
Drain hose
Pipings
Connecting
cable
Power supply
cord
PlasticPlastic
bandband
Plastic
band
Seal a smallSeal a small
opening aroundopening around
the pipings withthe pipings with
gum type sealer.gum type sealer.
Seal a small
opening around
the pipings with
gum type sealant.
Trap
Seal a small opening
around the pipings
with gum type sealer.

Leakage test and Evacuation
Leakage test and Evacuation
Air and moisture remaining in the refrigerant system have undesirable effects as indicated below.
1. Pressure in the system rises.
2. Operating current rises.
3. Cooling(or heating) efficiency drops.
4. Moisture in the refrigerant circuit may freeze and block capillary tubing.
5. Water may lead to corrosion of parts in the refrigeration system.
Therefore, the indoor/outdoor unit and connecting tube must be checked for leak tight, and vacu-
umed to remove incondensible gas and moisture in the system.
• 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. Check that both the liquid and the gas side ser-
vice valves on the outdoor unit are kept closed at this stage.
• Connect the manifold valve(with pressure gauges)
and dry nitrogen gas cylinder to this service port
with charge hoses.
CAUTION: Be sure to use a mani-
fold valve for leakage test.
If it is not available, use a stop valve for
this purpose. The "Hi" knob of the man-
ifold valve must always be kept close.
• Pressurize the system to no more than 3.0
Mpa with dry nitrogen gas and close the cylin-
der valve when the gauge reading reached 3.0
MPa Next, test for leaks with liquid soap.
CAUTION: To avoid nitrogen enter-
ing the refrigerant system in a liquid
state, the top of the cylinder must be high-
er than its bottom when you pressurize the
system. Usually, the cylinder is used in a
vertical standing position.
1. Do a leakage test of all joints of the
tubing(both Indoor unit and outdoor unit) and
both gas and liquid side service valves.
Bubbles indicate a leak. Be sure to wipe off
the soap with a clean cloth.
2. 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.
Preparation
Leakage test
Charge hose
Indoor unit
Outdoor unit
Manifold valve Pressure
gauge
Nitrogen gas
cylinder(in vertical
standing position)
Lo Hi
Installation Manual 15

Leakage test and Evacuation
1. 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 and Hi" 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.
2. When the desired vacuum is reached, close the "Lo
and Hi" knob of the manifold valve and stop the
vacuum pump.
Finishing the job
1. With a service valve wrench, turn the valve stem of
liquid side valve counter-clockwise to fully open the
valve.
2. Turn the valve stem of gas side valve counter-
clockwise to fully open the valve.
3. Loosen the charge hose connected to the gas side
service port slightly to release the pressure, then
remove the hose.
4. 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.
5. 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.
Indoor unit
Outdoor unit
Lo Hi
Manifold valve
Vacuum pump
Open Open
Pressure
gauge
Evacuation
Required time for evacuation when 30 gal/h
vacuum pump is used
30 min. or more 60 min. or more
0.07 kPa or less
If tubing length is less
than 10 m(33 ft)
If tubing length is longer
than 10 m(33 ft)
16 Air Conditioner

Test running
1. PRECAUTIONS IN TEST RUNNING
• The initial power supply must provide at least 90% of the rated voltage.
Otherwise, the air conditioner should not be operated.
CAUTION ①For test run, carry out the cooling operation firstly even during heat-
ing season. If heating operation is carried out firstly, it leads to the
trouble of compressor. Then attention must be paid.
② Carry out the test run more than 5 minutes without fail.
(Test run will be cancelled 18 minutes later automatically)
• The test run is started by pressing the room temperature checking button and down timer but-
ton for 3 seconds at the same time.
• To cancel the test run, press any button.
CHECK THE FOLLOWING ITEMS WHEN INSTALLATION IS COMPLETE
• After completing work, be sure to measure and record trial run properties, and store measured
data, etc.
• Measuring items are room temperature, outside temperature, suction temperature, blow out tem-
perature, wind velocity, wind volume, voltage, current, presence of abnormal vibration and noise,
operating pressure, piping temperature, compressive pressure.
• As to the structure and appearance, check following items.
2. Connection of power supply
1. Connect the power supply cord to the independent power supply.
• Circuit breaker is required.
2. Operate the unit for fifteen minutes or more.
3. Evaluation of the performance
1. Measure the temperature of the intake and discharge air.
2. Ensure the difference between the intake temperature and the discharge one is
more than 8°C (Cooling) or reversely (Heating).
□Is the circulation of air adequate?
□Is the draining smooth?
□Is the heat insulation complete
(refrigerant and drain piping)?
□Is there any leakage of refrigerant?
□Is the remote controller switch operated?
□Is there any faulty wiring?
□Are not terminal screws loosened?
M4......118N.cm{12kgf.cm} M5......196N.cm{20kgf.cm}
M6......245N.cm{25kgf.cm} M8......588N.cm{60kgf.cm}
Test running
Installation Manual 17

18 Air Conditioner
Test running
CAUTION: After the confirmation of the above conditions, prepare the wiring
as follows:
1) Never fail to have an individual power specialized for the air conditioner.
As for the method of wiring, be guided by the circuit diagram pasted on
the inside of control box cover.
2) Provide a circuit breaker switch between power source and the unit.
3) 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 dur-
ing the course of transportation. Check them and make sure that they
are all tightly fastened. (If they are loose, it could give rise to burn-out of
the wires.)
4) Specification of power source
5) Confirm that electrical capacity is sufficient.
6) Be sure that the starting voltage is maintained at more than 90 percent
of the rated voltage marked on the name plate.
7) Confirm that the cable thickness is as specified in the power sources
specification.
(Particularly note the relation between cable length and thickness.)
8) Never fail to equip a leakage breaker where it is wet or moist.
9) The following troubles would be caused by voltage drop-down.
• Vibration of a magnetic switch, damage on the contact point there of fuse
breaking, disturbance to the normal function of a overload protection device.
• Proper starting power is not given to the compressor.

Function
Installation Manual 19
Function
Forced Cooling Operation
• Adding the refrigerant in winter.
Setting Procedure
1) Set the Dip Switch as follow after shutting the power source down.
2) Reset the power.
3) Red LED and Green LED of PCB lights during work.
(The indoor unit is operated by force.)
4) If operation is done, Red LED will be turned off.
If operation is not done normally, Red LED will blink.
5) Close the Liquid valve only after green LED turned off (7 minutes from the start of the machine).
Then close the gas valve after Green LED on.
WARNING:
• When the green LED of PCB is on, compressor is going to be off because of low
pressure.
• You should return the Dip Switch to operate normally after finishing the operation.
• Improper Pump down will lead to product turn off along with LED (green &red) off
with in 20 minutes from the initial start.
6
Pump Down Dip S/W Setting
Power on
(Red LED On, Green LED Off)
Comp on
(Red LED On, Green LED On)
Pump Down Start
(Red LED On, Green LED Off) Liquid Valve Closed
Gas Valve Closed
Pump Down Complete
(Red LED Off, Green LED On)
Power off
(Red LED Off, Green LED On)
AUUQ36GH1
(ATUQ36GMLE3)
(AVUQ36GKLA0)
(ABUQ36GGLA0)
AUUQ18GH1 /AUUQ21GH1/ AUUQ24GH1
(ATUQ18GPLE3/ ATUQ21GPLE3/ ATUQ24GNLE3)
(AVUQ18GJLA0/ AVUQ21GJLA0 / AVUQ24GJLA0)
(ABUQ18GHLA0/ ABUQ21GHLA0/ ABUQ24GGLA0)
(ABUQ18GL2A0/ ABUQ21GL2A0/ ABUQ24GL3A0)
AUUQ42GH1/ AUUQ48GH1/ AUUQ54GH1
(ATUQ42GMLE3/ ATUQ48GMLE3/ ATUQ54GMLE3)
(AVUQ42GLLA0/ AVUQ48GLLA0/ AVUQ54GLLA0)
(ABUQ42GRLA0/ ABUQ48GRLA0/ ABUQ54GRLA0)

20 Air Conditioner
Self-diagnosis Function
If abnormal voltage is supplied, the protection circuits will turn off the product in order to prevent
the component damage. The product will automatically restart after 3 minutes.
Outdoor Error
Ex) Error 21 (DC Peack)
AUUQ36GH1
(ATUQ36GMLE3)
(AVUQ36GKLA0)
(ABUQ36GGLA0)
AUUQ18GH1 /AUUQ21GH1/ AUUQ24GH1
(ATUQ18GPLE3/ ATUQ21GPLE3/ ATUQ24GNLE3)
(AVUQ18GJLA0/ AVUQ21GJLA0 / AVUQ24GJLA0)
(ABUQ18GHLA0/ ABUQ21GHLA0/ ABUQ24GGLA0)
(ABUQ18GL2A0/ ABUQ21GL2A0/ ABUQ24GL3A0)
AUUQ42GH1/ AUUQ48GH1/ AUUQ54GH1
(ATUQ42GMLE3/ ATUQ48GMLE3/ ATUQ54GMLE3)
(AVUQ42GLLA0/ AVUQ48GLLA0/ AVUQ54GLLA0)
(ABUQ42GRLA0/ ABUQ48GRLA0/ ABUQ54GRLA0)
Self-diagnosis Function
Error Indicator (Outdoor)
2times ◑1time ◑OFF
2times ◑2times ◑OFF
2times ◑3times ◑OFF
2times ◑4times ◑OFF
2times ◑6times ◑OFF
2times ◑7times ◑OFF
2times ◑9times ◑OFF
3times ◑2times ◑OFF
4times ◑0 OFF
4times ◑1time ◑OFF
4times ◑3times ◑OFF
4times ◑4times ◑OFF
4times ◑5times ◑OFF
5times ◑1times ◑OFF
5times ◑3times ◑OFF
6times ◑0 OFF
6times ◑1times ◑OFF
6times ◑2times ◑OFF
6times ◑5times ◑OFF
6times ◑7times ◑OFF
21 DC Peak(IPM Fault)
22 Max. CT(CT2)
23 DC Link Low Volt.
24 Pressure switch/Heater Sink.
26 DC Comp Position Error
27 PFC Fault Error
29 Comp Over Current
32 D-Pipe High(Inv.)
40 CT Sensor(Open/Short)
41 Inv. D-Pipe Th Error(Open/Short)
43 High Pressure Sensor(Open/Short)
44 Outdoor air Th Error(Open/Short)
45 Cond. Middle Pipe Th Error(Open/Short)
51 Capacity over
53 Communication Error(Indoor ÷ Outdoor)
60 EEPROM Error(Outdoor)
61 Cond. Middle Pipe High
62 Heatsink Error(High)
65 Heatsink Th Error(Open/Short)
67 BLDC motor fan lock(Outdoor)
Error Code Description LED 1
(Red)
LED 2
(Green)
Indoor
status
1 Time 1 Time 1 Time
2 Times2 Times2 Times
1 Sec.
2 Sec. 2 Sec.
1 Sec. 1 Sec.
LED01G
(RED)
LED02G
(GREEN)