LG LV-B2420CL Manual de usuario

Room Air Conditioner

(Convertible Type)

SERVICE MANUAL

MODEL: LV-B2420CL/ B2420HL

LV-B2421CL/ B2421HL

LV-B1820CL/ B1820HL

LV-B1821CL/ B1821HL

Contents

Functions .................................................................................................................................3

Product Specifications (Cooling Only)..................................................................................5

Product Specifications (Cooling & Heating).........................................................................6

Dimensions..............................................................................................................................7

Refrigeration Cycle Diagram..................................................................................................9

Wiring Diagram......................................................................................................................11

Operation Details ..................................................................................................................13

Display Function ...................................................................................................................21

Self-diagnosis Function........................................................................................................21

Installation .............................................................................................................................22

Operation ...............................................................................................................................39

Disassembly of the parts (Indoor Unit) ...............................................................................41

2-way, 3-way Valve.................................................................................................................45

Cycle Troubleshooting Guide...............................................................................................51

Electronic Parts Troubleshooting Guide.............................................................................52

Electronic control device......................................................................................................56

Schematic Diagram ...............................................................................................................57

Exploded View and Replacement Parts List.......................................................................58

–2–

Functions

• Room temperature sensor. (Thermistor)

• Maintains the room temperature in accordance with the Setting Temp.

• Indoor fan is delayed for 5 seconds at the starting.

• Restarting is inhibited for approx. 3 minutes.

• High, Med, Low, Chaos

--- Lights up in operation

--- Lights up in Sleep Mode

--- Lights up in Timer Mode

--- Lights up in Deice Mode or Hot Start Mode (only Heating Model)

--- Lights up during compressor running

(only Cooling Model)

• Intermittent operation of fan at low speed.

• The fan is switched to low(Cooling), med(Heating) speed.

• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.

• The fan is switched to intermittent or irregular operation

• The fan speed is automatically switched from high to

low speed.

• The louver can be set at the desired position or swing

up and down, right and left (not on all models) automatically.

• The setting temperature, indoor fan speed and desired

operation made are automatically set by fuzzy rule.

Indoor Unit

Operation ON/OFF by Remote controller

Sensing the Room Temperature

Room temperature control

Starting Current Control

Time Delay Safety Control

Indoor Fan Speed Control

Operation indication Lamps (LED)

Soft Dry Operation Mode

• Both the indoor and outdoor fan

stops during deicing.

• Hot start after deice ends.

• The indoor fan stops until the

evaporator piping temperature will be

reached at 28°C(22˚C).

Deice (defrost) control (Heating)

Hot-start Control (Heating)

Sleep Mode Auto Control

Natural Air Control by CHAOS Logic

Airflow Direction Control

Auto Operation

–3–

–4–

Soft Dry Operation Mode.( )

Remote Controller

Operation ON/OFF

Reset

Operation Mode Selection

Fan Speed Selection

Room Temperature Display

Temperature Setting

Setting the Time or Timer

Timer Selection

Timer Setting

Timer Cancel

Sleep Operation

Airflow Direction Control

(Cooling

model only) (Heating

model only)

TEMPERATURE LOW HIGH

(Low) (Med) (High) (CHAOS)

Cooling Operation Mode.( )

Heating Operation Mode.( )

Auto Operation Mode.( )

Fan Operation Mode

ON OFF

SET

CANCEL

: High:39°C LOW:11°C

: OFF, ON, OFF ON

: Cancel Sleep Mode, Timer ON or Timer OFF.

: 1, 2, 3, 4, 5, 6, 7hr, Off Timer

: Fan Operates without cooling. (Cooling model only)

Cooling Heating

Down to 18°C

Up to 30°C

Down to 16°C

Up to 30°C

Product Specifications (Cooling Only)

Model Name

Item Unit

Cooling Capacity Btu/h(kcal/h) 18,000(4,536) 24,000(6,048)

Moisture Removal l/h 2.5 3.5

Power Source

, V, Hz

1ø 220, 60Hz

Indoor 13.5 15

Outdoor 45 50

Input W 2,000 1,950 2,750 2,700

Running Current A 9.7 9.2 13 13

E.E.R. Btu/h-W 9 9 8.73 8.73

Indoor 1,200 x 205 x 615

Outdoor 870 x 655 x 320

Indoor 30

Outdoor 45 55 60 60

Refrigerant (R-22) g 1,330 1,040 1,800 1,050

Airflow Direction Control (Up & Down) O O O

Remocon Type L.C.D Wireless

Liquid 1/4" (6.35) 3/8" (9.52) 1/4" (6.35)

Gas 1/2" (12.7) 5/8" (15.88) 5/8" (15.88)

Sleeping Operation O O O

Drain Hose O O O

Connecting Wire 0.75mm2

Main Power Cable 1.5mm22.5mm2

2.0mm2:for the Middle East)

Time Delay Safety Function O

Air Circulation O

Soft Dry O

Fan Speed (Indoor) 3 (Hi, Med, Low)

Timer 24Hrs

Self-Diagnosis O

Auto-Restart O

Air Circulation m3/min

Dimensions

(W HD)

Net. Weight

LV-B1820CL LV-B1821CL LV-B2420CL LV-B2421CL

–5–

Service Valve &

Connecting Tube

Product Specifications (Cooling & Heating)

–6–

Model Name

Item Unit

Cooling Capacity Btu/h(kcal/h) 18,000(4,536) 24,000(6,048)

Heating Capacity Btu/h(kcal/h) 18,000(4,536) 24,000(6,048)

Moisture Removal /h 2.5 3.5

Power Source

, V, Hz

1ø, 220, 60Hz

Indoor 13.5 15

Outdoor 45 50

Input Cooling 1,950 1,750 2,750 2,600

Heating 1,900 1,750 2,750 2,500

Running Current Cooling 9 8 13 12.5

Heating 8.8 8 13 11.5

E.E.R.(Cooling) Btu/h-W 9.23 9.34 8.73 9.23

C.O.P.(Heating) w/w 2.78 2.92 2.56 2.81

Indoor 1,200 x 205 x 615

Outdoor 870 x 655 x 320

Indoor 30

Outdoor 60 62

Refrigerant (R-22) g 1,480 1,140 1,800 1,400

Airflow Direction Control (Up & Down) O O

Remocon Type L.C.D Wireless

Liquid 1/4" (6.35) 3/8"(9.52) 1/4"(6.35)

Gas 1/2" (12.7) 5/8"(15.88)

Sleeping Operation O O

Drain Hose O O

Connecting Wire 0.75mm2

Main Power Cable 1.5mm22.5mm2

2.0mm2:for the Middle East)

Time Delay Safety Function O

Air Circulation O

Soft Dry O

Fan Speed (Indoor) 3 (Hi, Med, Low)

Timer 24Hrs

Self-Diagnosis O

Auto-Restart O

Air Circulation m3/min

Dimensions

(W HD)

Net. Weight

LV-B1820HL LV-B1821HL LV-B2420HL LV-B2421HL

Service Valve &

Connecting Tube

Dimensions

(1) Indoor Unit

250mm

36mm

36mm 1076mm

1200mm

205mm

615mm

392mm

265mm

468mm

63mm

38mm

175mm

(Installation Plate)

(Rear Side)

–7–

(2) Outdoor Unit

Gas side

3-way valve

Liquid side

3-way valve

L6L7 L8 L9

L11

L10

L5 L3

MODEL

DIM

W mm 870

H mm 655

D mm 320

L1 mm 370

L2 mm 25

L3 mm 340

L4 mm 630

L5 mm 25

L6 mm 546

L7 mm 162

L8 mm 162

L9 mm 54

L10 mm 74.5

L11 mm 79

–8–

LV-B1820CL/HL, LV-B1821CL/HL, LV-B2420CL/HL, LV-B2421CL/HL

Refrigeration Cycle Diagram

• LV-B1820CL

• LV-B1821CL

• LV-B2420CL

• LV-B2421CL

Pipe size(Diameter: ) Piping length(m) Elevation(m)

MODEL

Gas Liquid Rated Max Rated Max

LV-B1820CL 1/2" 1/4" 5 15 5 8

LV-B1821CL 1/2" 1/4" 5 15 5 8

LV-B2420CL 5/8" 3/8" 5 20 5 8

LV-B2421CL 5/8" 1/4" 5 20 5 8

INDOOR UNIT OUTDOOR UNIT

HEAT

EXCHANGER

(EVAPORATOR)

HEAT

EXCHANGER

(CONDENSER)

COMPRESSOR

GAS SIDE

LIQUID SIDE

CAPILLARY TUBE

–9–

For installation over rated distance, 30g of refrigerant should be added for each meter.

ex) When installed at a distance of 15m, 300g of refrigerant should be added.

(15-5) x 30g = 300g

• LV-B1820HL

• LV-B1821HL

• LV-B2420HL

• LV-B2421HL

For installation over rated distance, 30g of refrigerant should be added for each meter.

ex) When installed at a distance of 15m, 300g of refrigerant should be added.

(15-5) x 30g = 300g

–10–

INDOOR UNIT OUTDOOR UNIT

HEAT

EXCHANGER

HEAT

EXCHANGER

COMPRESSOR

GAS SIDE

LIQUID SIDE

CAPILLARY TUBE

COOLING

HEATING

REVERSING

VALVE

CHECK VALVE

CAPILLARY TUBE

Pipe size(Diameter: ) Piping length(m) Elevation(m)

MODEL

Gas Liquid Rated Max Rated Max

LV-B1820HL 1/2" 1/4" 5 15 5 8

LV-B1821HL 1/2" 1/4" 5 15 5 8

LV-B2420HL 5/8" 3/8" 5 20 5 8

LV-B2421HL 5/8" 1/4" 5 20 5 8

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