Transcript
Page 1: Treinamento da tecnologia invert

LG ELECTRONICS

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R410A Refrigerant

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R410A Refrigerant Characteristic

Item R-22 R-410A

CompositionMono

RefrigerantMixed Refrigerant

(R32:R125 = 50:50)

Ozone Depletion Potential (ODP)

0.0055 0

Global Warming Potential (GWP)

1700 1370

Saturation Pressure

(at 25℃. Psi)150 240

Boiling Point (℃) -40.8 -51.4

LeakageNo change in composition

Composition changes

RechargingLiquid/Gas/Both (Liquid+Gas)

Must be charged in liquid state

R410A vs R22

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R410A Temperature-Pressure Chart

Temp R410A R22

-40° 26 15

-35° 32 19

-30° 40 24

-25° 48 30

-20° 58 35

-15° 70 43

-10° 84 51

-5° 100 61

0° 118 72

5° 136 85

10° 168 99

15° 183 115

Temp R410A R22

20° 210 132

25° 240 150

30° 275 173

35° 312 196

40° 353 222

45° 397 250

50° 446 282

55° 500 315

60° 556 352

65° 618 392

70° 686 435

75° - 480

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.

R410AHIGH PRESSURE

1.6 times higherthan R22

High possibility ofgas leakage

Larger flare size

R22R410A

Problem :

Solution :

Caution during installation :

How its different from R22?

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R410A Procedure

R410A must be charged in liquid state. It’s a mixed refrigerant, if charging in vapor state the composition might changed.

Charge R410A cylinder in upright position to avoid loss in performance.

Caution during installation :

Why?

Liquid

Gas

Liquid

Gas

Right procedure :

Mono Refrigeran

t

Mixed Different ratio

Open Open

Why its different from R22?

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R410A Special Tool

DO NOT mix refrigerants in your tools. Dissimilar oils will become contaminated.

As pressure is high,it is impossible to measure using conventional gauge, To increase pressure resisting strength,hose materials and port size are different.

Why its different from R22?

Caution during installation :

New Tools Applicable to R22 Changes

Gauge ManifoldX

High Pressure : R410A 0.1 ~ 5.3 MPa (R22 ~ 3.5 MPa)Low Pressure : R410A 0.1 ~ 3.8 MPa (R22 ~ 1.7 MPa)

Charge HoseX

R410A : 1/2 UNF 20 threads per inch (R22 : 7/16 UNF)R410A : 5.1 Mpa (51 kgf/ ㎠ ) (R22 : 3.4 Mpa (34 kgf/ ㎠ ))

Vacuum PumpX

Pumps used with CFC and HCFC charged systems may also be used on R410A systems

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R410A Lubrication

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 Mineral oilEther oil

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.

Caution during installation :

Why its different from R22?

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General Operation Logic

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Basic Mode Controls

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

High ↔ Low High ↔ LowComp Off High ↔ Low High ↔ LowComp Off Comp Off

Thermo OFF

Thermo ONSet temp.

Set temp.-0.5℃

+0.5℃+4℃

+2℃

Thermo OFF

Thermo ON

Temp. Temp.

Comp.Frequency

Comp.Frequency

Modo de refriamento : Modo Aquecimento:

-1.5℃

3min

1)

2)

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Outdoor Temp (℃)

Resfriamento

(Max Step)

Outdoor Temp (℃)

Aquecimento

(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

• 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.

Compressor Frequency Restriction :

Basic Mode Controls

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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)

Intake Air. Temp

Pipe Temp

ON

ON

Max TempHeating Cycle(40 minutes)

ΔTmax

OFF ON

ON

ON

OFF

OFFON

ON

HOT START End

DefrostTime

ΔTmin=5℃ OverMin Temp

DefrostStart

DefrostEnd

Compressor

Outdoor Fan

Indoor Fan

4_way Valve

Max Temp

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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

20℃(Option)

28℃(Option)

ON

ON

ON

STOP LOW STOP LOW

Pipe Temp(Indoor) Pipe Temp(Indoor)

Compressor

Outdoor Fan

Indoor Fan

4_way Valve

Set Fan Speed Set Fan Speed

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Basic Mode Controls

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.

• 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

Sleep Timer 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.

Healthy Dehumidification Operation :

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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.

HeatingCooling / Dehumidification

Remote Control Display

Mode Defrost / AutoClean

//

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Processo de instalação.

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Electric Wiring Work

Trial Run

Installation Location

Piping Work

Insulation Work

Vacuum

Finishing Job

Check PointBasicLogic

Symptoms

Precautions ProcessingStandard Length

Leak Test RechargingVacuum Finishing

Indoor Checking Drainage

Outdoor

Joints Welding/Brazing

FixingInst. Plate

Drilling Hole

Setting Indoor

SettingOutdoor

Wiring SpecImproper

CaseConnecting

Wire

Flare Fitting

Wrapping Pipe & Drain

Installation Work Flow

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Installation Location

Piping work & Flare Check

Piping Connection

Electric Wiring Work

Insulation Vacuuming

Test Run Check : Pressure, voltage, current and temperature difference

Fluxo de instalação de passo a passo principal

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Installation Tools

Figure Name Figure Name

Screw driver, Spanner

Vacuum pump

Measuring tape, Knife

Multi-meter

Pincher plier, Nipper Ampere_meter

Hexagonal wrenchManifold Gauge for

R410A

Hole core drill Thermometer

Vinyl tape Flaring tool set

Ladder, Horizontal Level

R410A tank

Some of the tools used on R22 systems may be unacceptable for use on R410A.

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Installation Location

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Make sure there is no heat or steam around indoor unit. Make sure heat radiation from condenser is not blocked. Place where noise & vibration are minimum. Indoor & Outdoor Unit Space

Requirement :

Case of field defect :

How?

Iocal de instalação/ Selecting Best Location

More than 300

More than 600

More than 300

More than 700

More than 200

More than 100

More than 2300

More than 100

Unit : mm Unit : mm

•Blocked in/outlet air flowLow performance

•Difficult when servicing

•Limited inlet airflow Low cooling

Reduce cooling capacity.

Cause low performance.

Prevent noise problem.

Why?

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Case of field defect :

Installation location / Selecting Best Location

Outdoor unit is installed on top of each other without safely anchoring the unit. Noise/vibration Hard to service Safety issues

When installing the unit at a high place be sure to fix the unit legs (safety precautions) Consider enough space for service when installing outdoor unit.

Tips :

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Case of field defect :

~~~

~~~discharge air

Hot discharge air will enter the unit cause a work overload and starts OLP system(On/Off) Low Performance

Tips :

Always consider enough space when installing outdoor unit. Avoid small installation places as possible.

Installation location / Selecting Best Location

Inlet airflow to condenser is blocked Operating pressure will be high and the unit may repeatedly on-off resulting in low Cooling/Heating

Always follow the given space requirement when selecting install location.

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Cases of field defect :

Installation location / Selecting Best Location

Inlet airflow to evaporator is blocked product low cooling/heating noise might occurs

Tips :

Where inlet/outlet airflow is not blocked. Low cooling performance. Always follow the space requirements to prevent such cases.

Space Requirements for Indoor Unit

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3.5 M.

Installation location / Selecting Best Location

Cases of field defect :

Indoor unit is installed too high. Discharge air can not be fully distributed to user. Low cooling/heating

Tips :

Where inlet/outlet airflow is not blocked. Low cooling performance. Always follow the space requirements to prevent such cases. Consider safety, servicing space when selecting installation place.

Unproper unit installation place. Safety issues

Unproper unit installation place. Difficult during servicing

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Case of field defect :

Installation location / Fixing Installation Plate

Work Process :

Measuring & leveling

Select strong and solid wall. Measure the wall and mark the centerline. Horizontally align the plate centerline using horizontal level

How?Prevent vibration and unit fall off damage.

Easy wiring and piping through the wall.

If unit is slanted, water leakage may occurs.

Why?

• Bad fixing plate Noise!• Product fall off • Horizontally misalign Water leakage

Center hole

Place level on a raised tabUnit Outline

Φ70

Fixing point

Right rear

piping hole

Φ70

Left rear

piping hole

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Installation location / Drilling Hole

Select strong and solid wall. Drill the piping hole with a ø70mm hole core drill. Drill at either right or left with the hole slightly slanted

How?Prevent vibration and unit fall offdamage.

Easy wiring and piping through the wall.

Slanted to outdoor to ensure proper water flow.

Why?

Φ70Right rear

piping hole

Φ70

Left rear

piping hole

Work Process :

• Slightly slanted to outdoor side. Why?Ensure water properly flow in downward direction.

• Reference for dimensions Product Size

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Installation location / Settling Indoor Unit

Hold and press at the corner of the piping. When bending downward or to the left side, do it gently.

How bend the pipe properly?

Use it as a center of rotation to prevent damage.

Prevent damage to pipe which can cause cycle blocking.

Why?

Work Process :

Case of field defect :

• Damage indoor piping during bending. Clogged refrigerant cycle

Hold at the corner of pipingSlowly unfold the pipe

downwardBend to the left side slowly

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Installation location / Settling Indoor Unit

Work Process :

Drill the wall if customer wants the piping through the wall. Use the tubing holder when bending the pipe for connecting. Make sure to be extra careful when bending the pipe.

How?Customer satisfaction.

Sufficient space for easy piping.

Piping may get damagedclogged cycle.

Why?

Detach theChassis bottom

Hang the unit &unlock tubing

holder

Position the pipe for 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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Installation location / Settling Outdoor Unit

Work Process :

Secure the unit with an anti-vibration damper. Secure the unit with nail or wire strong wind or earthquake. If install site is close to seaside, avoid direct exposure.

How?Prevent the vibration to the unit

Product fall offdamage

Prevent from product or part corrosion.

Why?

Nut

Washer

Leg

Damper

Angle

• Corrosion due to sea windpart malfunction

Sea wind

Windbreak

Case of field defect :

• Anchor the unit with a bolt & nut

• Unstable Fall off

• Set up a wind breaker

• No damper Vibration

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Piping work

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Piping Work

Selecting Copper Pipe :

Do not use collapsed,deformed or discolored copper pipe. Never use copper pipes thinner than 0.8mm.

How?Expansion valve may become blocked.

Pipe may get damaged during flaring work .

Why?

Case of field defect :

Precaution :

• Sealed ends of pipes with a cap until connected.

• Avoid piping installation on a rainy day.

• Carry out the work in short time as possible.

• Water or dust does not enter the pipe.

Thickness (mm)

Nominal diameter

Outer diameter

(mm)R410A

1/4 6.35 0.80

3/8 9.52 0.80

1/2 12.70 0.80

5/8 15.88 1.00

• 0.6t Copper Pipe

Condition : Not round shape, Burr exist → resulting in egg-shaped flare work

High possibility of gas leakage

After Flaring

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Piping Work / Pipe Flaring Work

Remove the burrs after cutting work. Never use copper pipes thinner than 0.8mm.

How?Prevent burrs from enteringclogged cycle.

Pipe may damage during flaring work .

Why?

Work Process :

Cutting the pipe Burr removal

Place the pipe

Tighten the clamp Apply the torque Finish & check flare

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Piping Work / Pipe Flaring Work

Case of field defect :

ⓐ(inch)

ⓐ(mm)

R410A / ⓑ (mm)

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

Flaring Position : The use of flare clutch type is preferable.

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.

• Improper flaringGas leakage

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Piping Work / Piping Connection

Make sure that the flare do not have any scar or dust, etc. Make sure to follow the given applied torque.

How?Prevent strange material from entering system.

If applied torque is too strong, flare will get damaged.

Why?

Work Process :

Alignment Indoor Unit Outdoor UnitOutside 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

Ø19.05 3/4 9.9~12.1• Tighten the flare nut by hand.

• Tighten the flare nut with torque wrench untill the wrench clicks.

Case of field defect :

• Applied torque is too strong Flare will get damaged Gas leakage

Tightening Torque :

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Piping Work / Standard Pipe Length

Always follow the pipe length specification. Always remember to add refrigerant if the pipe length is

more than 5m.

How?When it is too short, cycle will be overloaded.

When it is too long, can cause over work at

compressor

Why?

Pipe Installation Length : AFTA Model

Capacity

Pipe Size

Standard Length

(m)

Max. Elevation (A) (m)

Min/Max Length

(B) (m)

Additional

Refrigerant (g/m)

Gas Φ Liquid Φ

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

7.0kW(24kBtu/h)

15.88 5/8 9.52 3/8 5 7 3 / 20 20

Case of field defect :

• Short Piping Refrigerant inflow noise is directly transmitted to indoor unit. Cycle overload.

(B)

(A)1m

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Piping Work / Pipe Joints Connection

Prior to use, be sure to remove all contaminants. Used to connect the copper pipes. Connections during brazing work.

How?Prevent from entering the system.

Case of pipe diameter is not the same with SVC

valve diameter.

Why?

Joint Type :

Flare Joints Socket Joints

Flare Joints Assembly Socket Joints Assembly

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Welding / Brazing Guide

Nitrogen should be allowed to flow without building up a pressure in the pipeline. Brazing requires sophisticated techniques, it must be performed by qualified person.

How?Prevent from carbon scales clogging.

Safety precautions and to make sure the work is

done properly without any leakage.

Why?

Brazing with Nitrogen :

Connect a nitrogen cylinderto one end of the pipework

Turn on the gas and

regulate the flow

Continue the flow until the joints have

cooled

0.0

5 ~

0.1

2 m

m.

10 mm↑

Caution point :

Pressure :0.1~0.2kgf/ ㎠(1.4~2.8psi)

.

.

Taping

Nitrogen release

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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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Elec. wiring Work

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Electric Wiring Work

Do not use spliced wires or extension cord. Inverter product higher harmonic

Therefore,be sure to install an earth leak detector.

How?Fire or electric shock may occur.

Product or earth leak detector malfunction.

Why?

Terminal Block

Remote Controller Cable

Connection Cable

Cable Retainer

Indoor & Outdoor Unit Wiring : Note :

Use end-terminal forsafety precautions

ConnectorNeutralLive Earth

Outdoor

Indoor

Excessive strip length shock or leakage

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Electric Wiring Work / Wire specification

Always follow the wiring & circuit breaker spec. Do not overload the circuit by adding drain pump or other

electrical equipment.

How?Cause abnormal heat/terminal overheating.

They may cause overheating or electrical shock.

Why?

Note :

Wire & Circuit Breaker Selection :

10±3mm

GND :20mm

10±3mm

GND :20mm

Outdoor Indoor

Circuit Breaker

Earth Leakage

Power Supply

CircuitBreake

r

Grade(kBtu)

9/12 18 24

15 20 30

Cross-section

area

Grade(kBtu)

9/12 18 24

1.0 1.5 2.5

(A)(mm²)

Circuit breaker size selection (Refer to Label Quality for current value) Normal : Running current x 1.75 Inverter : Running current x 2.0

Power Code Connection Cable

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1(L) 2(N) 3(C)

(L) (N) 1(L) 2(N) 3(C)

Brown

Blue

Red Green/yellow

Power Supply

Electric Wiring Work / Wiring Connection

1(L) 2(N) 3(C)

1(L) 2(N) 3(C)

Brown

Blue

RedGreen/yellow

Power Code

Connection cable

Connection cable

How :

Connect the wires between indoor & outdoor

units so that the terminal numbers and colors

are matched. Tighten the terminal screws securely. Do not extend cable connections.

If the wires are not matched, communication

error will occurs CH05,53.

If the connection is loosen, electric shock may

occur.

Extending cable will create noise or electric

short CH05,53

Why?

Indoor Power Supplied Type

Outdoor Power Supplied Type

OUT

IN

OUT

IN

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Electric Wiring Work / Wiring Connection

Case of field defect : Tips : Unproper power supply wiring / absent ground wire Heat ignition of terminal block can cause fire Electric shock

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.

Ground Terminal

Power Plug

Ground Wire

Main PowerSwitch

Earth LeakageBreaker

GroundWire

Sta

nd

ard

Ele

ctr

icC

od

e

1. Check if there is ground terminal at the plug, to prevent electrical short,perform an additional 3rd grounding at outdoor unit or carry out a separate grounded work.

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Electric Wiring Work / Wiring Connection

Case of field defect : Tips :

Electrical part is not used for only 1~2 years .Most of time, it will have to endure the same periodas 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 preventexposure to moisture/surrounding

Unproper extended wiring connection Cable over heat or fire might occur Communication Error CH05 occur(operation stop)

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Electric Wiring Work / Wiring Connection

Case of field defect :

Wrong wiring connection during installation of large numbers of the same model at the same site. Inoperative unit /abnormal operation

Room A Room B Room A Room B

wiring

piping

wiring

piping

Tips :

In case like this, make sure to double check that wiring connection and piping connection are connected to the same model.

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Insulation & Drain Work

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Insulation & Drain Work / Standard

Do the insulation after leak test is done. Bundle the pipe and drain hose together with vinyl tape.

How?

Gas leakage must be checked during test run.

Prevent possible water leakage.

Why?

Work Process :

Drain Hose

Refrigerant Pipe

ConnectingCable

Caution :

Liquid PipeGas PipeCutting Line

Cutting Line

Wrap together refrigerant piping, cable and drain hose with vinyl tape.

Set the tubing line upward prevent possible water leakage.

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Insulation & Drain Work / Case

Case of field defect :

Mold

Tips :

Fully insulate drain hose connection!

Indoor Outdoor

Indoor drain hose

InsulatorExtension

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.

Water leakage at pipe connection due to bad insulation. Mold gathers at the wall.

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Insulation & Drain Work / Water Leak Test

Pour a water to make sure well drainage. Make sure the route of drainage is done properly.

How?Prevent water leakage during operation.

If the drain hose curled, water leakage occurs.

Why?

Checking Drainage :

Pour a glass of water onto evaporator

Check possible leakage

Ensure water flows out the drain exit without leakage

Tips :Downward Slope

The drain hose should point downward for easy drain flow. Fix drain hose to prevent bending or curling Drain hose connection must be easy accessible & serviceable!

OK!

Indoor

Fix

ed

Page 50: Treinamento da tecnologia invert

LG ELECTRONICS

Case of field defect :

WaterLeakage

Slanted hose

Insulation & Drain Work / Water Leakage Defect

Tips :

Set the drain hose in the downward position drain water can flow smoothly.

Downward Slope

OK!

Indoor

Drain hose is in upward slanted direction drain water can not flow to outdoor unit.

Page 51: Treinamento da tecnologia invert

LG ELECTRONICS

WaterLeakage

Case of field defect :

Fix drain hose to prevent bending or curling

Tips :

OK!

Fix

ed

Insulation & Drain Work / Water Leakage Defect

Curled drain hose will block water flow water leaks at indoor unit

Page 52: Treinamento da tecnologia invert

LG ELECTRONICS

Case of field defect :

Insulation & Drain Work / Water Leakage Defect

Tips :

Wrap in the Bottom-Up direction

Wrap the area which accommodates the refrigerant piping, electric cable,drain hose with vinyl tape in Bottom-Up direction!

In case of when pipe connection have to be installed in upward direction Vinyl tape has to be wrapped from bottom to the top! Why?Prevent possible leakage to indoor when raining

Page 53: Treinamento da tecnologia invert

LG ELECTRONICS

Case of field defect :

Insulation & Drain Work / Water Leakage Defect

For every 1m, fix the drain pipe with clip/tie wrap

Tips :

Water back-flow occurs when the drain line is all the way drooping for over 2m Water leakage at indoor side

1m

Clip

Page 54: Treinamento da tecnologia invert

LG ELECTRONICS

Vacuum & Test run

Page 55: Treinamento da tecnologia invert

LG ELECTRONICS

Vacuum / Gas Leak Test

Top of cylinder must be higher than its bottom. Use soap bubble to identify the location of leak.

(flare connection)

How?To avoid nitrogen from entering the system.

Insufficient gas will reduce the cooling capacity.

Why?

Work Process :

Charge nitrogen-gas

Leak test with soap water

Gas release

No leakage

Tightened, repair location of leak

Leakage

Go to next step(Vacuum)

Liquid side

2(3)-wayvalve

3-wayvalve

Close

Close

Low High

Nitrogen

Nitrogen-GasCylinder

Gas side

Open Close

.

.

..

.

Page 56: Treinamento da tecnologia invert

LG ELECTRONICS

Vacuum / process-1

Air evacuation with vacuum pump is a MUST. Liquid and the gas side SVC valves are kept closed.

How?Air and moisture in system have bad effects as:

• Pressure in the system rises.

• Cooling/heating efficiency drops

Why?

Work Process : Vacuum

Check manifold low side

pressure reach to

76cmHg(30inHg)

Close low side valve of manifold

Turn off vacuum pump

No leakage

Disconnect vacuum

Tightened, repair location of leak

Leakage

Needle gauge does not

move after 5 minutes.

..

15mins

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

Liquid side

2(3)-wayvalve

3-wayvalve

Close

Close

Low High

Gas side

Open Close

.

.

..

.

.

Vacuum Pump

Page 57: Treinamento da tecnologia invert

LG ELECTRONICS

Vacuum / Process-2

How? Why?

Work Process :Vacuum

Check Vacuum gauge

pressure reach to 760 mmHg

Close both side valve of

manifold

Turn off the vacuum pump

Leakage

Disconnect vacuum

Tightened, repair location of leak

No leakage

15mins

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

Air evacuation with vacuum pump is a MUST. Liquid and the gas side SVC valves are kept closed.

Air and moisture in system have bad effects as:

• Pressure in the system rises.

• Cooling/heating efficiency drops

Liquid side

2(3)-wayvalve

3-wayvalve

Close

Close

Low High

Gas side

Open Open

.

.

..

.

. .

Vacuum gaugeVacuum Pump

Page 58: Treinamento da tecnologia invert

LG ELECTRONICS

Vacuum / Finishing Vacuum Work

Now, the gas is ready to be released to the system. Be sure to mount all the caps onto 2way & 3way SVC valve

How?Gas leakage must be checked during test run.

Prevent small possible leakage in future use.

Why?

Work Process :

Disconnect the manifold from the

vacuum pump and from the service port of 3way valve

Position both of the SVC valves to “Open”

using a hexagonal wrench(4mm)

Mount valve caps onto the 2way valve and the

3way valve

Liquid side

2(3)-wayvalve

3-wayvalve

Open

Open

Low High

Gas side

Close Close

.

.

..

.

. .

Vacuum Pump

.

Gas Release

Page 59: Treinamento da tecnologia invert

LG ELECTRONICS

Vacuum / Additional Refrigerant

Charge in standing upright position. Before recharging, check whether the cylinder has a

siphon or not.

How?Charging 410A must be in liquid state for right

composition effect such as low cooling.

Why?

Work Process :

Open low side valve of

manifold slowly

Balance zero

setting

Connect gas cylinder to manifold

Open Gas side SVC valve

Close low side valve of manifold

Refer manual Installation for gas weight(g) / pipe length(m)

Balance

Liquid side

2(3)-wayvalve

3-wayvalve

Close

Open

Low High

Gas side

Open Close

.

.

..

.

. .

Upright Position

Until target weight is reached

Page 60: Treinamento da tecnologia invert

LG ELECTRONICS

Test Run

Press “On/Off” button and hold for 3~6 secs. Check operating pressure,current, voltage etc.

How?To enter a mode that is specially designed for Test Run.

Ensure the product work properly or not.

Why?

Test Run Operating Logic :

ON/OFFButton

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

-Thermal On/Comp On -Vertical Auto Swing

Airflow

- Comp. fixed frequency

1. Measure the temperature of the intake & discharge air.

Ensure the difference between the intake & discharge temp. is more than 8℃ (Cooling) & 14℃(Heating)

Check Items :

Page 61: Treinamento da tecnologia invert

LG ELECTRONICS

Test Run

Check Items :

Refri.Outside ambient TEMP

Pressure of the gas

Side Service valve.

R410A 35 (95 )℃ ℉8.5~11.2 ㎏ / ㎠ G

(120~160 P.S.I.G)

2. Measure the pressure of the gas side service valve.

If the pressure is drop or significantly higher than specification:

Pressure is low:Gas leakage / insufficient

Pressure is high:System is overloaded Possibility of overchargeClosed SVC valve - Recheck

Recheck gas leak

Page 62: Treinamento da tecnologia invert

LG ELECTRONICS

Test Run

Check Items :

3. Measure the voltage & operating current.(Refer to Label Quality for specification)

Check Items Symptom Check

Indoor & Outdoor units are installed on solid bases.

Fall, vibration, noise

System is properly ground to earth

Electrical leakage

Wiring connection Inoperative or error code 05

Drain line is properly installed Water leakage

Power supply voltage/current complied with the rated value

Other Check Items :


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