R410A refrigerant requires careful consideration of installation location to ensure proper performance and avoid issues. The outdoor unit location should allow unblocked airflow and avoid heat sources. Indoor units require minimum clearances and should not be placed too high or in locations blocking airflow. Installation tools and procedures also differ from R22 systems and require special gauges and charge hoses to handle higher pressures.

1. LG ELECTRONICS

2. R410A Refrigerant
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3. R410A Refrigerant Characteristic
R410A vs R22
Item R-22 R-410A
Mixed Refrigerant
Composition Mono Refrigerant
(R32:R125 = 50:50)
Ozone Depletion
0.0055 0
Potential (ODP)
Global Warming
1700 1370
Potential (GWP)
Saturation Pressure
150 240
(at 25℃. Psi)
Boiling Point (℃) -40.8 -51.4
No change in
Leakage Composition changes
composition
Liquid/Gas/Both Must be charged in liquid
Recharging
(Liquid+Gas) state
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4. R410A Temperature-Pressure Chart
How its different from R22?
 A temperature-pressure chart can easily be used for charging, refrigerant cycle
analysis and diagnosis.
 R410A is 1.6 times higher vapor pressure than R-22 when saturated.
Caution during installation :
Temp R410A R22 Temp R410A R22
-40° 26 20° 210 132 HIGH PRESSURE
R410A
15
25° 240 150 1.6 times higher
-35° 32
19 30° 275 173 than R22
-30° 40 35° 312 196
24 40° 353 222
Problem :
-25° 48 45° 397 250 High possibility of
30 gas leakage
-20° 58 50° 446 282
35 55° 500 315
Solution :
-15° 70 60° 556 352
43 Larger flare size
65° 618 392
-10° 84 R410A
51 70° 686 435
R22
-5° 100 75° - 480
61
0° 118 LG ELECTRONICS

5. R410A Procedure
Why its different from R22?
 R410A must be charged in liquid state.
 It’s a mixed refrigerant, if charging in vapor state the composition might changed.
Why? Right procedure :
Open 
Open
Gas Gas
Liquid Liquid
Mono Mixed  Different ratio
Refrigerant
Caution during installation :
 Charge R410A cylinder in upright position to avoid loss in performance.
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6. R410A Special Tool
Why its different from R22?
 As pressure is high,it is impossible to measure using conventional gauge,
 To increase pressure resisting strength,hose materials and port size are different.
New Tools Applicable to R22 Changes
Gauge Manifold High Pressure : R410A 0.1 ~ 5.3 MPa
X (R22 ~ 3.5 MPa)
Low Pressure : R410A 0.1 ~ 3.8 MPa
(R22 ~ 1.7 MPa)
Charge Hose R410A : 1/2 UNF 20 threads per inch
X (R22 : 7/16 UNF)
R410A : 5.1 Mpa (51 kgf/ ㎠ )
(R22 : 3.4 Mpa (34 kgf/ ㎠ ))
Vacuum Pump Pumps used with CFC and HCFC
X charged systems may also be used
on R410A systems
Caution during installation :
DO NOT mix refrigerants in your tools.
 Dissimilar oils will become
contaminated.
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7. R410A Lubrication
Why its different from R22?
The chemistry of R-410A makes it incompatible with mineral based lubricants
The preferred lubricants are the Polyolester or Ether based oils.
 Exposure to the atmosphere must be limited.
  
Esther oil Ether oil Mineral oil
Caution during installation :
The oil is miscible, so it is very important to remove as much particulates
and moisture from the system  Vacuum MUST be performed.
 Moisture can be absorb very easily.
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8. General Operation Logic
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9. Basic Mode Controls
Modo de refriamento : Modo Aquecimento:
Temp. 3min Temp.
Thermo OFF
Thermo OFF +4℃
+0.5℃
+2℃ Thermo ON
Set temp.
1) Thermo ON
-0.5℃ Set temp.
-1.5℃
2)
Comp. High ↔ Low Comp Off High ↔ Low Comp. High ↔ Low Comp Off High ↔ Low Comp Off
Frequency Frequency
O operacional Hz depende da condição de carga, como a diferença entre a temperatura ambiente e
conjunto ou restrições de frequência.
• Após compressor está desligado, pode reiniciar novamente em 3 minutos o tempo de atraso > proteger
condição compressor
• No modo de resfriamento há dois casos quando o compressor está desligado (ver gráfico sup.)
1)Em quanto ΔTroom-set is lower than 0.5℃ for 3mins continuously or
2) when ΔTroom-set is lower than 1.5 ℃.
• No modo de aquecimento, quando ΔTroom Maior Conjunto E fazer Que 4 ℃, compressor Ira Parar de
trabalhar Há
e começar de novo quando ΔTroom conjunto-é inferior a 2 ℃.
• Por quê? Para garantir a capacidade de arrefecimento / aquecimento ideal
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10. Basic Mode Controls
Compressor Frequency Restriction :
• Uma das restrições de frequência é muitas limite de temperatura exterior.
• Isto significa que o máximo de trabalho Hz para o compressor é limitada pelo ambiente exterior
temperature. Por quê? para proteger o compressor e manter responsabilidade do produto.
Outdoor Temp Resfriament Outdoor Temp (℃) Aquecimento
(℃) o (Max Step)
(Max Step)
Outdoor ≤ 0 3 Outdoor ≤ -7 16
0< Outdoor ≤10 3 -7< Outdoor ≤-2 15
10< Outdoor ≤ 23 4 -2< Outdoor ≤ 4 13
23< Outdoor ≤ 30 10 4< Outdoor ≤ 10 11
30< Outdoor ≤40 12 10< Outdoor ≤21 11
46< Outdoor ≤10 8 21< Outdoor ≤27 5
46< Outdoor 7 27< Outdoor 3
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11. Basic Mode Controls
Defrosting Control :
•Durante o modo de aquecimento, o ciclo é invertido para o ciclo de aquecimento para descongelar o
evaporador
tubo da unidade exterior. Por quê? Para proteger o tubo da unidade exterior do congelamento.
• Em desgelo controle, a amostra. é, que a ventoinha interior, ventilador ao ar livre, ea válvula de 4 vias
estão fora.
• Durante a descongelação, o min. temp. do tubo interior é medido e é comparado com o
apresentar temp. do tubo interior para obter a diferença de que a temperatura interior. (Se a diferença
for
5 ℃ ou superior, controlo de descongelação é completada e no modo de aquecimento é levada a cabo
de novo) Heating Cycle
HOT START
End Max Temp
Max Temp (40 minutes)
ΔTmax
Defrost
Pipe Temp Start
Defrost
End
Intake Air.
ΔTmin=5℃ Over
Temp Min Temp
Defrost
Time
Compressor ON
Outdoor Fan ON OFF ON
Indoor Fan ON OFF ON
4_way Valve ON OFF ON
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12. Basic Mode Controls
Hot Start Operation :
• Durante o início de funcionamento de aquecimento, este sistema foi concebido para evitar que o ar frio
a partir de serem descarregados,
enquanto espera depois de atingir uma certa temperatura (desta vez, ventilador interno está desligado).
Após a temperatura interior do tubo atinge 28 ℃ (opção), o ar quente vai sair na seguinte ordem da
velocidade do ventilador
Velocidade baixa velocidade do ventilador -> definido pelo controle remoto
• O diagrama de funcionamento é como a seguir
Pipe Temp
(Indoor) Pipe Temp(Indoor)
28℃(Option)
20℃(Option)
Compressor ON
Outdoor Fan ON
Indoor Fan STOP LOW Set Fan Speed STOP LOW Set Fan Speed
4_way Valve ON
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13. Basic Mode Controls
Sleep Timer Operation :
• A temperatura de regulação será automaticamente aumentada de 1 ℃ 30 minutos
mais tarde, e por 2 ℃ 1 hora mais tarde (arrefecimento / desumidificação saudável)
• A operação será interrompida depois (1,2,3,4,5,6,7: opção) horas
• Indoor fan control :
- cooling/ Healthy Dehumidification/ Auto Mode ▶ Low speed
- Heating/Auto Mode ▶ Mid speed
Auto Change over Operation :
•O condicionador de ar muda automaticamente o modo de funcionamento de arrefecimento ou
com aquecimentoou aquecimento para o arrefecimento para manter a temperatura da sala interior
constante.
•Quando temp. variar ao longo ± 2 ℃, ar condicionado mantém a temperatura ambiente. em ± 2
℃ com
respeitar para ajustar a temperatura, alterando o modo de arrefecimento ou com aquecimento e
vice-versa.
Healthy Dehumidification Operation :
• Quando a entrada de operação de desumidificação pelo controle remoto é recebido,
a temperatura do ar de admissão é detectada ea temperatura ambiente é automaticamente ajustado
de acordo a temperatura do ar de admissão.
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14. Basic Features
Different angle of vane for each operation mode:
• Isto é especialmente concebido para proporcionar o fluxo de ar ideal durante cada operação.
• Como o ar frio é mais pesado que o ar quente na mesma umidade. Assim, o fluxo de ar é gerado
por o lançamento de mais pesado do ar
• Usando o mesmo princípio, é por isso que o ângulo de palhetas do modo de resfriamento é
maior do que o modo de aquecimento.
Mode Cooling / Dehumidification Heating Defrost / AutoClean
Remote Control
Display
/ /
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15. Processo de instalação.
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16. Installation Work Flow
Fixing Drilling Setting Setting
Installation Location Inst. Plate Hole Indoor Outdoor
Standard Flare
Piping Work Precautions Processing
Length Fitting
Welding/
Joints
Brazing
Electric Wiring Work Connecting Improper
Wiring Spec
Wire Case
Insulation Work Wrapping Pipe & Drain
Vacuum Leak Test Vacuum Recharging Finishing
Finishing Job Checking
Indoor Outdoor
Drainage
Trial Run Basic
Check Point Symptoms
Logic
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17. Fluxo de instalação de passo a passo principal
Installation Location Piping work & Flare Check Piping Connection
Electric Wiring Work Insulation Vacuuming
Test Run Check : Pressure, voltage, current and temperature difference
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18. Installation Tools
 Some of the tools used on R22 systems may be unacceptable for use on R410A.
Figure Name Figure Name
Screw driver, Spanner Vacuum pump
Multi-meter
Measuring tape, Knife
Pincher plier, Nipper Ampere_meter
Hexagonal wrench Manifold Gauge for R410A
Hole core drill Thermometer
Vinyl tape Flaring tool set
Ladder, Horizontal Level R410A tank
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19. Installation Location
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20. Iocal de instalação/ Selecting Best Location
How? Why?
 Make sure there is no heat or steam around Reduce cooling capacity.
indoor unit. Cause low performance.
 Make sure heat radiation from condenser is not Prevent noise problem.
blocked.
 Place where noise & vibration are minimum.
Indoor & Outdoor Unit Space Requirement :
Unit : mm Unit : mm
More than 300
More than 200 More than 300
More than
100
More than
100
More than 600
More than 700
More than 2300
Case of field defect :
•Blocked in/outlet
air flow
Low performance
•Limited inlet airflow •Difficult when servicing
 Low cooling
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21. Installation location / Selecting Best Location
Case of field defect : Tips :
 Outdoor unit is installed on top of each other without  When installing the unit at a high place be sure
safely anchoring the unit. to fix the unit legs (safety precautions)
 Noise/vibration  Consider enough space for service when
 Hard to service
installing outdoor unit.
 Safety issues
 
 
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22. Installation location / Selecting Best Location
Case of field defect : Tips :
 Hot discharge air will enter the unit cause a work  Always consider enough space when
overload and starts OLP system(On/Off) installing outdoor unit.
 Low Performance  Avoid small installation places as possible.
  
~
~
~
~
~
~
discharge air
 Inlet airflow to condenser is blocked  Always follow the given space requirement
 Operating pressure will be high and the unit may
when selecting install location.
repeatedly on-off resulting in low Cooling/Heating
  
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23. Installation location / Selecting Best Location
Cases of field defect : Tips :
 Inlet airflow to evaporator is blocked Where inlet/outlet airflow is not blocked.
 product low cooling/heating Low cooling performance.
 noise might occurs  Always follow the space requirements
to prevent such cases.
 Space Requirements for Indoor Unit

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24. Installation location / Selecting Best Location
Cases of field defect : Tips :
 Indoor unit is installed too high. Where inlet/outlet airflow is not blocked.
 Discharge air can not be fully distributed to user. Low cooling performance.
 Low cooling/heating  Always follow the space requirements
to prevent such cases.
  Consider safety, servicing space when
selecting installation place.
 Unproper unit installation place.
3.5 M.  Difficult during servicing

 Unproper unit installation place.
 Safety issues
  
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25. Installation location / Fixing Installation Plate
How? Why?
 Select strong and solid wall. Prevent vibration and unit fall off 
 Measure the wall and mark the centerline. damage.
 Horizontally align the plate centerline using Easy wiring and piping through the wall.
horizontal level If unit is slanted, water leakage may
Work Process : occurs.
Place level on a raised tab
Unit Outline Fixing point
Left rear
piping hole Φ70 Φ70
Right rear
Measuring & leveling
Center hole piping hole
Case of field defect :
• Product fall off • Bad fixing plate Noise! • Horizontally misalign  Water leakage
LG ELECTRONICS

26. Installation location / Drilling Hole
How? Why?
 Select strong and solid wall. Prevent vibration and unit fall
 Drill the piping hole with a ø70mm hole core drill. offdamage.
Easy wiring and piping through the wall.
 Drill at either right or left with the hole Slanted to outdoor to ensure proper water
slightly slanted
Work Process : flow.
• Reference for dimensions Product Size
Left rear
piping hole Φ70 Φ7
Right rear
0
piping hole
• Slightly slanted to outdoor side.
Why?Ensure water properly flow in downward
direction.
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27. Installation location / Settling Indoor Unit
How bend the pipe properly? Why?
 Hold and press at the corner of the piping. Use it as a center of rotation to prevent
 When bending downward or to the left side, do it damage.
gently. Prevent damage to pipe which can cause cycle
blocking.
Work Process :
Slowly unfold the pipe
Hold at the corner of piping Bend to the left side slowly
downward
Case of field defect :
• Damage indoor piping during bending.
 Clogged refrigerant cycle
LG ELECTRONICS

28. Installation location / Settling Indoor Unit
How? Why?
 Drill the wall if customer wants the piping through Customer satisfaction.
the wall. Sufficient space for easy piping.
 Use the tubing holder when bending the pipe for Piping may get damagedclogged
connecting. cycle.
Work Process :be extra careful when bending the pipe.
Make sure to
Detach the Hang the unit & Position
Chassis unlock tubing the pipe for
bottom holder connection
Caution :
• Make sure the unit and install plate are
just in the right position and stable.
 Unit might fall off during working.
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29. Installation location / Settling Outdoor Unit
How? Why?
 Secure the unit with an anti-vibration damper. Prevent the vibration to the unit
 Secure the unit with nail or wire  strong wind or Product fall offdamage
earthquake. Prevent from product or part
 If install site is close to seaside, avoid direct corrosion.
exposure.
Work Process :
• Anchor the unit with a bolt & nut • Set up a wind breaker
Nut
Windbreak

Washer
Leg Sea wind
Damper 
Angle
Case of field defect :
• Unstable  Fall off • No damper  Vibration • Corrosion due to sea windpart malfunction
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30. Piping work
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31. Piping Work
How? Why?
 Do not use collapsed,deformed or discolored copper Expansion valve may become blocked.
pipe. Pipe may get damaged during flaring work .
 Never use copper pipes thinner than 0.8mm.
Precaution : Selecting Copper Pipe :
• Sealed ends of pipes with a cap until connected. Thickness (mm)
Nominal Outer
• Avoid piping installation on a rainy day. diameter diameter R410A
(mm)
• Carry out the work in short time as possible.
1/4 6.35 0.80
• Water or dust does not enter the pipe. 3/8 9.52 0.80
1/2 12.70 0.80
5/8 15.88 1.00
Case of field defect :
After Flaring
• 0.6t Copper Pipe
Condition : Not round shape, Burr exist
→ resulting in egg-shaped flare
work
High possibility of gas leakage
LG ELECTRONICS

32. Piping Work / Pipe Flaring Work
How? Why?
 Remove the burrs after cutting work. Prevent burrs from enteringclogged
 Never use copper pipes thinner than 0.8mm. cycle.
Pipe may damage during flaring work .
Work Process :
Cutting the pipe Burr removal Place the pipe
Tighten the clamp Apply the torque Finish & check flare
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33. Piping Work / Pipe Flaring Work
Flaring Position : The use of flare clutch type is preferable.
ⓐ(inc ⓐ(m R410A / ⓑ (mm)
h) m)
Clutch type Wing nut type
1/4 6.35 1.1 ~ 1.3 1.5 ~ 2.0
3/8 9.52 1.5 ~ 1.7 1.5 ~ 2.0
1/2 12.70 1.6 ~ 1.8 2.0 ~ 2.5
5/8 15.88 1.6 ~ 1.8 2.0 ~ 2.5
Defect OK
 Checking Flare Work
 Compare the flaring work with the figure.
 If a flaring section is defective, cut it off
 and do
flaring work again.
Case of field defect :
• Improper flaringGas leakage
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34. Piping Work / Piping Connection
How? Why?
 Make sure that the flare do not have any scar or Prevent strange material from entering
dust, etc. system.
 Make sure to follow the given applied torque. If applied torque is too strong, flare
will get damaged.
Work Process : Tightening Torque :
Alignment Indoor Unit Outdoor Unit
Outside diameter Torque
mm inch kgf· ㎜
Ø6.35 1/4 1.8~2.5
Ø9.52 3/8 3.4~4.2
Ø12.7 1/2 5.5~6.5
Ø15.88 5/8 6.3~8.2
• Tighten the flare • Tighten the flare nut with torque wrench Ø19.05 3/4 9.9~12.1
nut by hand. untill the wrench clicks.
Case of field defect :
• Applied torque is too strong
Flare will get damaged  Gas leakage
LG ELECTRONICS

35. Piping Work / Standard Pipe Length
How? Why?
 Always follow the pipe length specification. When it is too short, cycle will be
 Always remember to add refrigerant if the pipe overloaded.
length is When it is too long, can cause over work
more than 5m. at
Pipe Installation Length : AFTA Model compressor
Pipe Size
Gas Φ Liquid Φ
Max. Additiona
Standard Min/Max
Elevation l
Length Length
Capacity Refrigera
(m) (B) (m)
(A) (m) nt (g/m)
mm inch mm inch
2.5kW(9kBtu/h) 9.52 3/8 6.35 1/4 5 7 3 / 15 10
3.5kW(12kBtu/h) 12.7 3/8 6.35 1/4 5 7 3 / 15 10
5.2kW(18kBtu/h) 12.7 1/2 6.35 1/4 5 7 3 / 20 20
Case of field defect :
7.0kW(24kBtu/h) 15.88 5/8 9.52 3/8 5 7 3 / 20 20
• Short Piping
 Refrigerant inflow noise is directly (B)
1m transmitted to indoor unit. (A)
 Cycle overload.
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36. Piping Work / Pipe Joints Connection
How? Why?
 Prior to use, be sure to remove all contaminants. Prevent from entering the system.
 Used to connect the copper pipes. Case of pipe diameter is not the same with
 Connections during brazing work. SVC
valve diameter.
Joint Type :
Flare Joints Socket Joints
Flare Joints Assembly Socket Joints Assembly
LG ELECTRONICS

37. Welding / Brazing Guide
How? Why?
 Nitrogen should be allowed to flow without building Prevent from carbon scales clogging.
up
a pressure in the pipeline. Safety precautions and to make sure the
 Brazing requires sophisticated techniques, it must work is
be
done properly without any leakage.
performed by qualified person.
Brazing with Nitrogen :
Turn on the gas Continue the flow
Connect a nitrogen cylinder
and until the joints have
to one end of the pipework cooled
regulate the flow
10 mm↑
0.05 ~ 0.12 mm.
Caution point : Nitrogen release
.
Pressure :0.1~0.2kgf/ ㎠
(1.4~2.8psi)
.
Taping
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38. Welding / Brazing Guide
Case of field defect :
Brazing without Nitrogen release :
Problem: Carbon scales clogging filters
Troubles during circulation in a cycle, like clogging EEV,
Compressor, moving parts, piping etc
• Pipe frozen  Cycle blocked
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39. Elec. wiring Work
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40. Electric Wiring Work
How? Why?
 Do not use spliced wires or extension cord. Fire or electric shock may occur.
 Inverter product  higher harmonic Product or earth leak detector
Therefore,be sure to install an earth leak malfunction.
detector.
Indoor & Outdoor Unit Wiring : Note :
Terminal Block
Indoor Remote Controller
Cable
Connection Cable
Cable Retainer
Use end-terminal for
Live Neutral Connector Earth safety precautions
Excessive strip length
Outdoor
 shock or leakage
LG ELECTRONICS

41. Electric Wiring Work / Wire specification
How? Why?
 Always follow the wiring & circuit breaker spec. Cause abnormal heat/terminal overheating.
Do not overload the circuit by adding drain pump or They may cause overheating or electrical
other shock.
electrical equipment.
Wire & Circuit Breaker Selection :
Power Code Connection Cable Outdoor Indoor
10±3mm 10±3mm
Circuit
GND :20mm GND :20mm
Breaker
(mm²) (A)
Earth
Grade(kBtu) Grade(kBtu)
Leakage
Cross 9/12 18 24 Circuit 9/12 18 24
-section Breaker
Power Supply
area
1.0 1.5 2.5 15 20 30
Note :
Circuit breaker size selection (Refer to Label Quality for current value)
 Normal : Running current x 1.75
 Inverter : Running current x 2.0
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42. Electric Wiring Work / Wiring Connection
How :
Indoor Power Supplied Type
IN 1(L) 2(N) 3(C)  Connect the wires between indoor &
outdoor
Brown Red units so that the terminal numbers and
Green/ colors
Connection cable Blue yellow are matched.
 Tighten the terminal screws securely.
OUT 1(L) 2(N) 3(C)  Do not extend cable connections.
Power
Code
Why?
Outdoor Power Supplied Type If the wires are not matched,
communication
IN error will occurs CH05,53.
1(L) 2(N) 3(C)
If the connection is loosen, electric
Brown Red Green/ shock may
Blue yellow
occur.
Connection cable
Extending cable will create noise or
(L) (N) 1(L) 2(N) 3(C) electric
OUT
short CH05,53
Power Supply
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43. Electric Wiring Work / Wiring Connection
Case of field defect : Tips :
 Unproper power supply wiring / absent ground wire 1. Check if there is ground terminal at the plug,
 Heat ignition of terminal block can cause fire to prevent electrical short,perform an additional
 Electric shock 3rd grounding at outdoor unit or carry out a
separate grounded work.
Ground
Terminal


Ground
Wire
Power
Plug
2. Electrical work such as Indoor↔Outdoor
connection,earth leakage breaker ground wire
must be carried out in accordance with state &
local electrical wiring codes.

d
Electric
Standar
Code
Main Power
Switch
Ground
Wire Earth Leakage
Breaker
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44. Electric Wiring Work / Wiring Connection
Case of field defect : Tips :
 Unproper extended wiring connection
 Electrical part is not used for only 1~2 years .
 Cable over heat or fire might occur Most of time, it will have to endure the same period
 Communication Error CH05 occur(operation stop) as air conditioner’s lifetime itself.
 Therefore, temporary dan simple wiring work will
only cause likely fire or electrical shock.
  Extending electric wire;
1st layer of insulation :
Make sure to solder the wires to reduce the contact
resistance and by using thermal contraction tube.
2nd layer of insulation :
Wrap the connection with insulation tape to prevent
exposure to moisture/surrounding
 

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45. Electric Wiring Work / Wiring Connection
Case of field defect : Tips :
 Wrong wiring connection during installation of large  In case like this, make sure to double check that
numbers of the same model at the same site. wiring connection and piping connection are
 Inoperative unit /abnormal operation connected to the same model.
Room A Room B Room A Room B
piping piping
 wiring wiring
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46. Insulation & Drain Work
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47. Insulation & Drain Work / Standard
How? Why?
 Do the insulation after leak test is done. Gas leakage must be checked during test
 Bundle the pipe and drain hose together with vinyl run.
tape. Prevent possible water leakage.
Work Process :
Wrap together refrigerant piping, cable and drain hose with vinyl tape.
Refrigerant Pipe
Drain Hose
Connecting
Cable
Caution : Set the tubing line upward  prevent possible water leakage.
Cutting Line
 
Cutting Line
Gas Pipe Liquid Pipe
LG ELECTRONICS

48. Insulation & Drain Work / Case
Case of field defect : Tips :
 Water leakage at pipe connection due to bad Indoor Outdoor
insulation.
 Mold gathers at the wall. Insulator
Extension
Hose
Indoor
drain hose
 Fully insulate the connection part between indoor
drain hose & extension hose.
 If not,leakage may occur as the water will
condensate due to temperature changes.
Fully insulate drain hose connection!
Mold
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49. Insulation & Drain Work / Water Leak Test
How? Why?
 Pour a water to make sure well drainage. Prevent water leakage during operation.
 Make sure the route of drainage is done properly. If the drain hose curled, water leakage
occurs.
Checking Drainage :
Pour a glass of water Check possible Ensure water flows out the
onto evaporator leakage drain exit without leakage
Tips :
Indoor Downward Slope
 The drain hose should point downward for
easy drain flow.
 Fix drain hose to prevent bending or curling
d
OK!
Fixe
 Drain hose connection must be easy
accessible & serviceable!
LG ELECTRONICS

50. Insulation & Drain Work / Water Leakage Defect
Case of field defect : Tips :
 Drain hose is in upward slanted direction  Set the drain hose in the downward position
 drain water can not flow to outdoor unit.  drain water can flow smoothly.
Slanted hose
Indoor Downward Slope

Water
Leakage
OK!
 
LG ELECTRONICS

51. Insulation & Drain Work / Water Leakage Defect
Case of field defect : Tips :
 Curled drain hose will block water flow  Fix drain hose to prevent bending or curling
 water leaks at indoor unit


Water 
OK!
d
Leakage
Fixe
LG ELECTRONICS

52. Insulation & Drain Work / Water Leakage Defect
Case of field defect : Tips :
 In case of when pipe connection have to be installed  Wrap the area which accommodates the refrigerant
in upward direction piping, electric cable,drain hose with vinyl tape in
 Vinyl tape has to be wrapped from bottom to the top! Bottom-Up direction!
Why?Prevent possible leakage to indoor when raining
 Wrap in the
 Bottom-Up direction
LG ELECTRONICS

53. Insulation & Drain Work / Water Leakage Defect
Case of field defect : Tips :
 Water back-flow occurs when the drain line  For every 1m, fix the drain pipe with clip/tie wrap
is all the way drooping for over 2m
 Water leakage at indoor side
Clip
∝
1m


LG ELECTRONICS

54. Vacuum & Test run
LG ELECTRONICS

55. Vacuum / Gas Leak Test
How? Why?
 Top of cylinder must be higher than its bottom. To avoid nitrogen from entering the system.
 Use soap bubble to identify the location of leak. Insufficient gas will reduce the cooling
capacity.
(flare connection)
Work Process :
Charge nitrogen-gas
.
Close Tightened, repair
location of leak
Liquid side
.
Leak test
2(3)-way Leakage
with soap water
valve .
Gas side .
Close No leakage
Low High
Nitrogen
Open Close Gas release
. 3-way
valve
Go to next step
Nitrogen-Gas (Vacuum)
Cylinder
LG ELECTRONICS

56. Vacuum / process-1
How? Why?
 Air evacuation with vacuum pump is a MUST. Air and moisture in system have bad
effects as:
 Liquid and the gas side SVC valves are kept closed.
• Pressure in the system rises.
• Cooling/heating efficiency drops
Work Process : Vacuum
 15mins
. Check manifold low
Close
side pressure reach
to 76cmHg(30inHg) ..
Liquid side
.
2(3)-way Tightened,
valve Close low side valve
. repair
of manifold
Gas side . location
of leak
Close
Turn off vacuum
Low High pump
Open Close
. . 3-way
valve Needle gauge does not
move after 5 minutes. Leakage
Vacuum Pump
No leakage
 Required time for evacuation when 30 gal/h vacuum pump is Disconnect vacuum
used.
LG ELECTRONICS

57. Vacuum / Process-2
How? Why?
 Air evacuation with vacuum pump is a MUST. Air and moisture in system have bad
effects as:
 Liquid and the gas side SVC valves are kept closed.
• Pressure in the system rises.
• Cooling/heating efficiency drops
Work Process :
Vacuum
 15mins
.
Close
Check Vacuum Tightened,
Liquid side gauge repair
.
pressure reach to location
2(3)-way 760 mmHg of leak
valve .
Gas side . Close both side
Close valve of manifold Leakage
Low High
Open Open No leakage
. . . 3-way
valve
Turn off the
vacuum pump
Vacuum Pump Vacuum gauge
Disconnect vacuum
 Required time for evacuation when 30 gal/h vacuum pump is
used.
LG ELECTRONICS

58. Vacuum / Finishing Vacuum Work
How? Why?
 Now, the gas is ready to be released to the system. Gas leakage must be checked during test
 Be sure to mount all the caps onto 2way & 3way SVC run.
valve Prevent small possible leakage in future
use.
Work Process :
Disconnect the manifold from
the vacuum pump
and from the service port of
. 3way valve
Open
Liquid side
.
2(3)-way
valve . Position both of the SVC
Gas side . valves to “Open” using a
Open hexagonal wrench(4mm)
Low High
Close Close Mount valve caps onto the
. . . 3-way 2way valve and the 3way
valve valve
.
Vacuum Pump
Gas Release
LG ELECTRONICS

59. Vacuum / Additional Refrigerant
How? Why?
 Charge in standing upright position. Charging 410A must be in liquid state for
 Before recharging, check whether the cylinder has a right
siphon or not. composition  effect such as low cooling.
Work Process :
Connect gas cylinder
to manifold
.
Close
Open Gas side
Liquid side SVC valve
.
2(3)-way
valve Balance zero
. setting
Gas side .
Upright Open
Position Open low side valve
Low High of manifold slowly
Open Close
. . . 3-way
Until target weight is reached
valve
Balance Close low side valve
of manifold
Refer manual Installation for gas weight(g) / pipe
length(m)
LG ELECTRONICS

60. Test Run
How? Why?
 Press “On/Off” button and hold for 3~6 secs. To enter a mode that is specially designed
for Test Run.
 Check operating pressure,current, voltage etc.
Ensure the product work properly or not.
Test Run Operating Logic :
In this mode, regardless of the outside temperature, the unit will operate
for 18±1 minute in below conditions:
-Cooling Mode -Indoor Fan High RPM
ON/OFF
-Thermal On/Comp On -Vertical Auto Swing Airflow
Button
- Comp. fixed frequency
Check Items :
1. Measure the temperature of the intake & discharge air.
 Ensure the difference between the intake
& discharge temp. is more than
8℃ (Cooling) & 14℃(Heating)
LG ELECTRONICS

61. Test Run
Check Items :
2. Measure the pressure of the gas side service valve.
Outside Pressure of the gas
Refri. ambient
TEMP Side Service valve.
8.5~11.2 ㎏ / ㎠ G
R410A 35℃(95℉)
(120~160 P.S.I.G)
 If the pressure is drop or significantly higher than specification:
Pressure is low: Pressure is high:
Gas leakage / insufficient System is overloaded
Possibility of overcharge
Closed SVC valve - Recheck
Recheck gas leak
LG ELECTRONICS

62. Test Run
Check Items :
3. Measure the voltage & operating current.(Refer to Label Quality for specification)
 Power supply voltage/current complied with the rated value
Other Check Items :
Check Items Symptom Check
Indoor & Outdoor units are Fall, vibration, noise
installed on solid bases.
System is properly ground to Electrical leakage
earth
Wiring connection Inoperative or error code
05
Drain line is properly Water leakage
installed
LG ELECTRONICS