LG LM-2164H2L, LM-3064H3L Service manual

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Page 1

Multi Type Room Air Conditioner

SERVICE MANUAL

MODEL: LM-2164H2L/M

LM-3064H3L/M

Page 2

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

Product Specifications................................................................................................................ 5

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

Refrigeration Cycle Diagram..................................................................................................... 10

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

Operation Details ....................................................................................................................... 12

Display Function........................................................................................................................ 19

Self-Diagnosis Function............................................................................................................ 19

Installation.................................................................................................................................. 20

Operation.................................................................................................................................... 34

Disassembly of the parts (Indoor Unit).................................................................................... 36

2-way, 3-way Valve..................................................................................................................... 38

Cycle Troubleshooting Guide ....................................................................................................42

Electronic Parts Troubleshooting Guide.................................................................................. 43

Electronic Control Device ......................................................................................................... 50

Schematic Diagram.................................................................................................................... 53

Exploded View and Replacement Parts List............................................................................ 55

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Contents

Page 3

- 3 -

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(for Heat pump model)

--- Lights up in Compressor operation(for 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 automatically.

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)

OUT

DOOR

Health Dehumidification Operation

• 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.

Sleep Mode Auto Control

Natural Air Control by CHAOS Logic

Airflow Direction Control

Deice (defrost) control (Heating)

Hot-start Control (Heating)

Page 4

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Remote Controller

JET COOL

Healthy Dehumidification Operation Mode.

( )

Operation Mode Selection

(Cooling

model only)

(Heating

model only)

Cooling Operation Mode.( )

Heating Operation Mode.( )

Auto Operation Mode.( )

Sleep Operation

Fan Operation Mode

Room, Temperature Display

Setting the Time or Timer

Airflow Direction Control

Operation ON/OFF

Temperature Setting

TEMPERATURE

LOWHIGH

Timer Selection

ON OFF

Timer Setting

SET

Timer Cancel

CANCEL

Reset

Fan Speed Selection

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

: (High: 39°C LOW : 11°C)

Down to 18°C Up to 30°C

Cooling

: OFF, ON, OFF ON

: Cancel Sleep Mode, Timer ON or Timer OFF

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

: Fan Operates without cooling or heating.

Down to 16°C Up to 30°C

Heating

Page 5

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Product Specifications

21,000(5,292) 14,000(3,528) 7,000(1,764) 21,000(5,292) 14,000(3,528) 7,000(1,764)

3.0 2.0 1.0 1Ø, 220-240V, 50Hz

Indoor 10.5 6.5 Outdoor 53 Indoor 41 38 Outdoor 55

2,200 1,420 900 2,200 1,420 830

9.7 6.2 4.0

9.7 6.2 3.8

9.5 9.9 7.8

9.5 9.9 8.4 Indoor 13 7.5 Outdoor 61 Indoor 888 x 287 x 170 / 802 x 262 x 165 Outdoor 870 x 655 x 320 Indoor 10 / 7 Outdoor 62

1,500 990

L.C.D Wireless Liquid 1/4"(6.35) Gas 1/2"(12.7) 3/8"(9.52)

O O

Operation

A-Unit OnlyA-Unit + B-Unit B-Unit Only

Unit

Item

Cooling Capacity Heating Capacity Moisture Removal §⁄/h

Power Source ø, V, Hz

Air Circulation m3/min

Noise Level dB(A)

Input W

E.E.R. Btu/h.w C.O.P. -

Motor Output W

Dimensions(W x H x D)

Net. Weight kg

Refrigerant(R-22)(at 7.5m)

g Airflow Direction Control(Up & Down) Remocon Type

Service Valve

Sleeping Operation Drain Hose

Cooling Heating Cooling Heating

Cooling

Heating

Runnig

Current

Btu/h(kcal/h)

1. LM-2164H2L/M

Page 6

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14,000(3,528)

10,000(2,520) 24,000(6,048) 14,000(3,528) 28,000(7,056)

14,000(3,528)

10,000(2,520) 24,000(6,048) 14,000(3,528) 28,000(7,056)

2.0 1.5 3.4 2.0 4.0 1Ø, 220-240V, 50Hz

10.5 6.5 – – – 58 – – –

41 38 – – –

60 1,520 1,400 2,750 1,520 2,870 1,550 1,460 2,840 1,320 2,700

6.7 6.2 12.3 6.7 12.8

6.8 6.4 8.7 5.8 12.0

9.2 7.1 8.5 9.2 9.8

9.0 6.8 8.5 10.6 10.4 13 7.5

101.5

888

x 287 x 170 / 802 x 262 x 165

870 x 800 x 320

10 7 – – –

1,170 1,220 – – –

L.C.D Wireless

1/4"(6.35) – – –

1/2"(12.7) 3/8"(9.52) – – –

O O

Operation

A-Unit

B or C-Unit A+B or C

B+C A+B+C

Unit

Item

Cooling Capacity Heating Capacity Moisture Removal §⁄/h Power Source ø, V, Hz

Air Circulation m3/min

Noise Level dB(A)

Input W

E.E.R. Btu/h.w C.O.P. -

Motor Output W

Dimensions(W x H x D)

Net. Weight kg

Refrigerant(R-22)(at 7.5m)

g Airflow Direction Control(Up & Down) Remocon Type

Service Valve

Sleeping Operation Drain Hose

Cooling Heating

Indoor

Outdoor

Indoor

Outdoor

Indoor

Outdoor

Indoor

Outdoor

Indoor

Outdoor

Liquid

Gas

Cooling

Heating Cooling

Heating

Runnig

Current

Btu/h(kcal/h)

2. LM-3064H3L/M

Page 7

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Dimensions

Installation plate

Right rear piping

Left rear piping

ø70mm

50mm

20mm

80mm

ø70mm

Center

ø70mm

Left rear piping Right rear piping

Tubing hole cover

W mm 802 888

H mm 262 287 D mm 165 170

7K Btu Series

14K Btu Series

MODEL

DIM

(7K)

(14K)

(14K )

1. Indoor Unit

Page 8

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L10

Gas side 3-Way valve

Liquid side 2-Way valve

L7L5L6

2. Outdoor Unit

2-1. LM-2164H2L/M

W mm 870 H mm 655 D mm 320 L1 mm 370 L2 mm 25 L3 mm 630 L4 mm 25 L5 mm 546 L6 mm 160 L7 mm 160 L8 mm 64 L9 mm 76.5 L10 mm 50

LM-2164H2L/M

MODEL

DIM

Page 9

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L5L6 L7 L8

L10L9

Gas side 3-way valve

Liquid side 2-way valve

L10L10L10L10

2-2. LM-3064H3L/M

W mm 870 H mm 800 D mm 320 L1 mm 370 L2 mm 25 L3 mm 775 L4 mm 25 L5 mm 546 L6 mm 160 L7 mm 160 L8 mm 64 L9 mm 76.5 L10 mm 50

LM-3064H3L/M

MODEL

DIM

Page 10

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Refrigeration Cycle Diagram

1. LM-2164H2L/M

2. LM-3064H3L/M(Cooling & Heating models)

HEAT EXCHANGER

COOLING HEATING DEICE

HEAT

EXCHANGER

CAPILLARY TUBE

COMPRESSOR-B

COMPRESSOR-A

CAPILLARY TUBE

2-WAY VALVE

4-WAY VALVE

B-UNITA-UNIT

3-WAY VALVE

4-WAY VALVE

Pipe Size (Diameter : inch)

Max.

piping length

(m)

Max.

piping elevation

(m)

Gas Liquid

3/8"(1/2") 1/4" 10~15 5~7

ex)

Solenoid Valve Capillary Cooling & Deice Heating

Indoor Unit Outdoor Unit

Heat Exchanger

A-Unit

Heat Exchanger

Comp-A

B-Unit

C-Unit

Heat Exchanger

2- WAY Valve

3- WAY Valve

2- WAY Valve

3- WAY Valve

Comp-B

Page 11

3854A20023B

INDOOR WIRING DIAGRAM

CN-DISP1

CN-U/D

FUSE

AC250V/T2A

CN-TH

SSR

SH-CAPA.

CN-POWER CN-FAN

ZNR

THERMISTOR

FORCED OPERATION

AUTO RESTART

REMOTE CONTROL

STEP

MOTOR

MAIN PCB

ASM

DISPLAY PCB ASM

TO OUTDOOR UNIT

PILLAR TERMINAL

1(L) 2(N

)

OUTDOOR WIRING DIAGRAM

MOTOR

MAIN PCB ASSY

TO INDOOR UNIT

A-UNIT B-UNIT C-UNIT

MAIN

POWER

TERMINAL BLOCK

CN-TRANS

BR BL

BK BK

"A"

COMP

WH RD BL YL

BL BL BK BK

S R

OLP

OPTION

BK(Hi)

T/B2 T/B3

OPTION

T/B1

T/B4

1 3

5 3 1 3 1

RD WH BK

GN/YL

CN-COM

CN-TH1 CN-TH2

CN-POWER

RY8

RY9

RY3

RY2

RY1

CN-FAN CN-BYPASSCN-COMP

CAPA.

FUSE T3.15A

THERMISTOR

TRANSFORMER

OLP

OPTION

2 1

RY10

RY7

RY5

RY4

"B"

COMP

1(L) 1(L)2(N) 1(L) 2(N)2(N)

3 3 3

H C F

B-S.V

C-S.V

A 4-WAY

B 4-WAY

4 3 2 1

CN-SV

OUTDOOR WIRING DIAGRAM

3854AP3911C

MAIN PCB ASSY

TO INDOOR UNIT

A-UNIT B-UNIT

MAIN POWER

TERMINAL BLOCK

CN-TRANS

BK BK

BL YL

BK BK

H C F

"A"

COMP

BLBKRD

S R

OLP

T/B2

T/B1

T/B3

GN/YL

MOTOR

4 33 11 3 2 1

5 3 1 3 1

WH BK

GN/YL

CN-COM

CN-TH1 CN-TH2

CN-POWER

CN-SV

RY9

RY3

RY2

RY1

RY10

CN-FANCN-COMP

CAPA.

FUSE T3.15A

THERMISTOR

TRANSFORMER

OLP

"B"

COMP

1(L) 1(L)2(N) 1(L) 2(N)2(N)

3 3

A 4-WAY

B 4-WAY

OPTION

- 11 -

Wiring Diagram

1. Indoor Unit

• LM-2164H2L/M

• LM-3064H3L/M

2. Outdoor Unit

• LM-2164H2L/M • LM-3064H3L/M

Page 12

Operation Details

■ MAIN UNIT FUNCTION

• DISPLAY

1) Cooling Only Model Operation Indicator

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

• Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on)

Sleep Timer Indicator

• On while in sleep timer mode, off when sleep timer cancel or appliance operation pause

Timer Indicator

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

Comp. Running Incidator

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

2) Heat Pump Model Operation Indicator

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

• Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on)

Sleep Timer Indicator

• On while in sleep timer mode, off when sleep timer cancel or appliance operation pause

Timer Indicator

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

Defrost Indicator

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

■ Cooling Mode Operation

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

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

Compressor ON Temp ➲ Setting Temp+0.5°C Compressor OFF Temp ➲ Setting Temp-0.5°C

• While in compressor running, operating with the airflow speed set by the remote control. While in compressor not running, operating with the low airflow speed regardless of the setting.

■ Healthy Dehumidification Mode

• When the dehumidification operation input by the remote control is received, the intake air temperature is detected and the setting temp is automatically set according to the intake air temperature.

26°C ≤ Intake Air Temp ➲ 25°C 24°C ≤ Intake Intake Air Temp<26°C ➲ Intake Air Temp-1°C 18°C ≤ Intake Intake Air Temp<24°C ➲ Intake Air Temp-0.5°C Intake Air Temp<18°C ➲ 18°C

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Page 13

• While in compressor off, the indoor fan repeats low airflow speed and pause.

• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidification operation and 4-min compressor off repeat.

Compressor ON Temp. ➲ Setting Temp+0.5°C Compressor OFF Temp. ➲ Setting Temp-0.5°C

• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.

■ Heating Mode Operation(Heat Pump models)

• When the intake air temp reaches +3°…above the setting temp, the compressor is turned off. When below the setting temp, the compressor is turned on.

Compressor ON Temp. ➲ Setting Temp. Compressor OFF Temp. ➲ Setting Temp.+3°C

• While in compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C, when above 28°C , it operates with the low or setting airflow speed. When the indoor pipe temp is between 20°C and 28°C, it operates with Super-Low(while in sleep mode, with the medium airflow speed).

• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C, when above 35°C , it operates with the low airflow speed.

• If overloaded while in heating mode operation, in order to prevent the compressor from OLP operation, the outdoor fan is turned on/off according to the indoor pipe temp.

• While in defrost control, both of the indoor and outdoor fans are turned off.

■ Defrost Control(Heat Pump models)

• Defrost operation is controlled by timer and sensing temperature of outdoor pipe.

• The first defrost starts only when the outdoor pipe temperature falls below -6°C after 60 minutes passed from starting of heating operation and more than 10 minutes operation of compressor.

• Defrost ends after 12 minutes passed from starting of defrost operation or after the outdoor fan operates within max. 2 minutes 30 seconds when the outdoor pipe temperature rises over 12°C even it before 12 minutes.

• The second defrost starts only when the outdoor pipe temperature falls below -6°C after 60 minutes passed from ending of the first defrost and more than 10 minutes operation of compressor.

■ Cooling overload

• Control indoor fan by sensing outdoor pipe temperature.

• One step down from setting fan speed if pipe temperature is oven 50°C and if below 45°C, operate on setting temperature.

■ Heating overload(Heat Pump models)

• Outdoor fan ON/OFF by sensing outdoor pipe temperature.

• Outdoor fan is OFF if pipe temperature is over 6.5°C and outdoor fan is ON if pipe temperature is below 0°C.

• Outdoor fan is off if any one part is heating overload condition.

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Page 14

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■ Fuzzy Operation (Cooling Only Model)

• According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.

Compressor ON Temp ➲ Setting Temp + 0.5°C Compressor OFF Temp ➲ Setting Temp + 0.5°C

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time.

26°C ≤ Intake Air Temp ➲ 25°C 24°C ≤ Intake Air Temp < 26°C ➲ Intake Air Temp + 1°C 22°C ≤ Intake Air Temp < 24°C ➲ Intake Air Temp + 0.5°C 18°C ≤ Intake Air Temp < 22°C ➲ Intake Air Temp Intake Air Temp<18°C ➲ 18°C

• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule.

• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature.

■ Fuzzy Operation (Heat Pump Models)

• When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since the operation off, the operation mode is selected.

• When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and only the indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake air temp at that moment as follows.

24°C ≤ Inatake Air Temp ➲ Fuzzy Operation for Cooling 21°C ≤ Inatake Air Temp<24°C ➲ Fuzzy Operation for Dehumidification Inatake Air Temp<21°C ➲ Fuzzy Operation for Heating

• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10 sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated.

1) Fuzzy Operation for Cooling

• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.

Compressor ON Temp ➲ Setting Temp +0.5°C Compressor OFF Temp ➲ Setting Temp + 0.5°C

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time.

26°C≤ Intake Air Temp ➲ 25°C 24°C≤ Intake Air Temp<26°C ➲ Intake Air Temp + 1°C 22°C≤ Intake Air Temp<24°C ➲ Intake Air Temp + 0.5°C 18°C≤ Intake Air Temp<22°C ➲ Intake Air Temp Intake Air Temp<18°C ➲ 18°C

• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature.

Page 15

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2) Fuzzy Operation for Dehumidification

Compressor ON Temp ➲ Setting Temp + 0.5°C Compressor OFF Temp ➲ Setting Temp+0.5°C

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time.

26°C ≤ Intake Air Temp ➲ 25°C 24°C ≤ Intake Air Temp<26°C ➲ Intake Air Temp+1°C 22°C ≤ Intake Air Temp<24°C ➲ Intake Air Temp+0.5°C 18°C ≤ Intake Air Temp<22°C ➲ Intake Air Temp Intake Air Temp<18°C ➲ 18°C

• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as in dehumidification operation.

3) Fuzzy Operation for Heating

• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 3°C or more above the setting temp, the compressor is turned off. When below the setting temp, the compressor is turned on.

Compressor ON Temp ➲ Setting Temp Compressor OFF Temp ➲ Setting Temp + 3°C

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time.

20°C≤Intake Air Temp ➲ Intake Air Temp + 0.5°C Intake Air Temp<20°C ➲ 20°C

• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to the intake air temperature and the setting temperature.

■ Airflow Speed Selection

• The airflow speed of the indoor fan is set to high, medium, low, or chaos (auto) by the input of the airflow speed selection key on the remote control.

■ On-Timer Operation

• When the set time is reached after the time is input by the remote control, the appliance starts to operate.

• The timer LED is on when the on-timer is input. It is off when the time set by the timer is reached.

• If the appliance is operating at the time set by the timer, the operation continues.

Page 16

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■ Off-Timer Operation

• When the set time is reached after the time is input by the remote control, the appliance stops operating.

• The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached.

• If the appliance is on pause at the time set by the timer, the pause continues.

■ Off-Timer <=> On-Timer Operation

• When the set time is reached after the on/off time is input by the remote control, the on/off-timer operation is carried out according to the set time.

■ Sleep Timer Operation

• When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote control while in appliance operation, the operation of the appliance stops.

• While the appliance is on pause, the sleep timer mode cannot be input.

• While in cooling mode operation, 30 min later since the start of the sleep timer, the setting temperature increases by 1°C. After another 30 min elapse, it increases by 1°C again.

• When the sleep timer mode is input while in cooling cycle mode, the airflow speed of the indoor fan is set to the low.

• When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set to the medium.

■ Chaos Swing Mode

• By the Chaos Swing key input, the upper/lower vane automatically operates with the Chaos Swing or they are fixed to the desired direction.

• While in Chaos Swing mode, the angles of cooling and heating cycle operations are different.

■ Chaos Natural Wind Mode

• When the Chaos Natural Wind mode is selected and then operated, the high, medium, or low speed of the airflow mode is operated for 2~15 sec. randomly by the Chaos Simulation.

■ Jet Cool Mode Operation (Cooling Only Model)

• If the Jet Cool key is input at any operation mode while in appliance operation, the Jet Cool mode operates.

• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.

• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C

• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.

• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and then operated in order that the air outflow could reach further.

■ Jet Cool Mode Operation (Heat Pump Models)

• While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in the other

mode operation (cooling, dehumidification, ventilation), the Jet Cool mode is operated.

• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.

• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C.

• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.

• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and then operated in order that the air outflow could reach further.

Page 17

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■ Auto Restarting Operation

• When the power is restored after a sudden power failure while in appliance operation, the mode before the power failure is kept on the memory and the appliance automatically operates in the mode on the memory.

• The slide switch on the main unit of the appliance should be on the Auto Restarting position in order that the Auto Restarting operation is available.

• Operation Mode that is kept on the memory

- State of Operation ON/OFF

- Operation Mode/Setting Temp/Selected Airflow Speed

- Sleep Timer Mode/Remaining Time of Sleep Timer (unit of hour)

• If no input by the remote control or no switching of the slide switch within 7 hr after the appliance operates by the Auto Restarting operation, the appliance is forced to stop at the moment of 7-hr elapse.

Slide Switch

FORCED OPERATION

AUTO RESTART

REMOTE CONTROL

■ Forced Operation (Cooling Only Model)

• To operate the appliance by force in case that the remote control is lost, the forced operation selection switch is on the main unit of the appliance to operate the appliance in the standard conditions.

• When the power is supplied while the slide switch is on the forced operation position, or when the slide switch position is switched to the Auto Restarting position (or test operation) or switched from the remote control position to the forced operation position while the power is on, the forced operation is carried out.

• When the slide switch position is switched from the forced operation position to the Auto Restarting position or the remote control position, the forced operation is canceled and the appliance stops operating.

• The forced operation is carried out in cooling mode with the setting temperature 22°C and the high speed of airflow.

• While in forced operation, the key input by the remote control has no effect and the buzzer sounds 10 times to indicate the forced operation.

■ Forced Operation (Heat Pump Models)

• When the power is supplied while the slide switch is on the forced operation position, or when the slide switch position is switched to the Auto Restarting (or test operation) position or switched from the remote control position to the forced operation position while the power is on, the forced operation is carried out.

•

The forced operation is carried out in cooling mode with the setting temperature 22°C and the high speed of airflow.

• In the forced operation mode, the indoor fan is operated at low speed for around 15 sec and then the operation condition is set according to the intake air temperature as follows.

24°C≤Intake Air Temp ➲ Cooling Mode Operation, 22°C, High Speed 21°C≤Intake Air Temp<24°C ➲ Dehumidification Operation, 23°C, High Speed Intake Air Temp<21°C ➲ Heating Mode Operation, 24°C, High Speed

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■ Remote Control Operation Mode

• When the remote control is selected by the slide switch on the main unit, the appliance operates according to the input by the remote control.

■ Protection of the evaporator pipe from frosting

• If the indoor pipe temp is below 0°C in 7 min. after the compressor operates without any pause while in cooling cycle operation mode, the compressor and the outdoor fan are turned off in order to protect the indoor evaporator pipe from frosting.

• When the indoor pipe temp is 7°C or higher after 3 min. pause of the compressor, the compressor and the outdoor fan is turned on according to the condition of the room temperature.

■ Buzzer Sounding Operation

• When the appliance-operation key is input by the remote control, the short "beep-beep-" sounds.

• When the appliance-pause key is input by the remote control, the long "beep—" sounds.

• When a key is input by the remote control while the slide switch on the main unit of the appliance is on the forced operation position, the error sound "beep-beep-beep-beep-beep-" is made 10 times to indicate that the remote control signal cannot be received.

Page 19

Display Function

1. Heating Model 2. Cooling Model

• Cooling, Soft Dry, Fan, Heating • Cooling, Soft Dry, Fan

• Sleep Mode • Sleep Mode

• Timer Mode • Timer Mode

• Hot-start, Defrost

Self-diagnosis Function

■ Error Indicator

• The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble.

• Error mark is ON/OFF for the operation LED of evaporator body in the same manner as the following table.

• If more than two troubles occur simultaneously, primarily the highest trouble fo error code is expressed.

• After error occurrence, if error is released, error LED is also released simultaneously.

• To operate again on the occurrence of error code 12, be sure to pull out power cord and then re-insert.

• Having or not of error code is different from Model.

Operation Indicator

Timer Indicator

Sleep Timer Indicator

Defrost Indicator

-19-

Operation Indicator

Timer Indicator

Sleep Timer Indicator

Compressor on Indicator

OUT

DOOR

(once)

(twice)

(5times)

(once)

(twice)

(3times)

3sec 3sec

3sec

3sec 3sec

3sec

3sec 3sec

3sec

Error Code

Error LED

(Indoor body operation LED)

Error contents SVC check point

• Indoor suction temperature thermistor open/short.

• Indoor pipe temperature thermistor open/short.

• Indoor TH ass'y check

• Outdoor TH ass'y check

• Resetting of remocon operating mode

• Communication

line/circuit check

• Primarily check

refrigerant pressure

• Connecting pipe check

• Connecting cable check

• Outdoor suction temperature thermistor open/short.

• Outdoor pipe temperature thermistor open/short.

• Abnormal operation of multi product. (Simultanueous operation of cooling and heating)

• Misconnection of connecting cables

• Poor communication

Page 20

- 20 -

Installation

Front

Right Rear right

Rear left

Down right

Left

1) Selection of the best location

1. Indoor unit

• There should not be any heat source or steam

near the unit.

• There should not be any obstacles to prevent the air circulation.

• A place where air circulation in the room will be good.

• A place where drainage can be easily obtained.

• A place where noise prevention is taken into consideration.

• Do not install the unit near the door way.

• Ensure the spaces indicated by arrows from the wall, ceiling, fence, or other obstacles.

2. Outdoor unit

• If an awning is built over the unit to prevent direct sunlight or rain exposure, be careful that heat radiation from the condenser is not restricted.

• There should not be any animals or plants which could be affected by hot air discharged.

• Ensure the spaces indicated by arrows from the wall, ceiling, fence, or other obstacles.

3. Piping length and the elevation

Pipe Size

GAS LIQUID

Max. piping

length

A (m)

Max.

Elevation

B (m)

1/2"(3/8") 1/4" 10~15 5~7

(1) Installation of Indoor, Outdoor unit

More than

5 cm

More than eye-level

More than 10 cm

More than 5 cm

More than

5 cm

More than 10 cm

More than 70 cm

Indoor unit

Outdoor unit

Page 21

- 21 -

2) Indoor Unit Installation

The mounting wall should be strong and solid enough to protect it from the vibration.

1. Mount the installation plate on the wall with four Type "A" screws.

(If mounting the unit on the concrete wall, consider using anchor bolts.)

• Always mount the Installation plate horizontally

by aligning the marking-off line by means of the thread and a level.

2. Drill the piping hole with 70mm dia. holecore drill.

• Line according to the arrows marked on lower

the left and the rght side of the Installation Plate. The meeting point of the extended line is the center of the hole.

• Drill the piping hole at either the right or the left

and the hole should be slightly slant to the outdoor side.

Installation Plate

marking-off line

Thread

Weight

Type "A" screw

The lower left and the right side of Installation Plate

7K Btu

14K Btu

Left rear piping Right rear piping

80mm

20mm

50mm

ø70mm

Left rear piping Right rear piping

20mm

ø70mm ø70mm

Wall

Indoor Outdoor

5~7mm

Page 22

- 22 -

1) Preparation of pipings

1. Cut the pipes and the cable.

• Use the accessory piping kit or the pipes pur-

chased locally.

• Measure the distance between the indoor and

the outdoor unit.

• Cut the pipes a little longer than the measured

distance.

• Cut the cable 1.5m longer than the length of the

pipe.

2. Remove burrs.

• Remove burrs from cut edges of pipes.

• Turn the pipe end toward down to avoid the

metal powder entering the pipe.

Caution:

If burrs are not removed, they may cause a gas leakage.

3. Flaring the pipes.

• Insert the flare nuts, mounted on the connection

ports of both indoor and outdoor unit, onto the copper pipes. Some refrgerant gas may leak, when the flare nuts are removed from the indoor unit, as some gas is charged to prevent the inside of the pipe from rusting.

• Fit the copper pipe end into the Bar of flare tool

about 0~0.5mm higher. (See illustration)

• Flare the pipe ends.

4. Tape the flaring portion to protect it from the dust or damages.

Slanted

Pipe cutter

Rough

"A"

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Bar

Yoke

Handle

When properly flared, the internal surface flare will evenly shine and be of even thickness. Since the flare part comes into contact with the connectors, carefully check the flare finish.

A"; ø12.7 mm (1/2") →0~0.5 mm

ø9.52 mm (3/8")

→

0~0.5 mm

ø6.35 mm (1/4")

→

0~0.5 mm

(2) Piping and Drainage of Indoor Unit

Point down

Pipe

Reamer

= Improper flaring =

Inclined Cracked Uneven

Surface

damaged

thickness

Page 23

- 23 -

Connection of Pipings

1. Remove the installation plate

• Pull the two '∆' marked portion of bottom of the chassis and pull the installation plate out of chassis.

2. Route the drain hose and the indoor tubing.

For left rear piping

3. Route the tubing and the drain hose straight

backwards(see figure).

4. Insert the connecting cable into the indoor

unit through the piping hole.

• Do not connect the cable to the indoor unit.

• Make a small loop with the cable for easy connection later.

5. Tape the tubing, drain hose and the connecting cable. Be sure that drain hose locates at the lowest side of the bundle. Locating at the upper side can be a reason that drain water overflows drain pan inside the unit.

Installation plate

Pull

• To remove the holder, press the bottom of the chassis near the holder upwards and the tab is clear of its hole.

• Turn it clockwise approx. 90° and remove it.

Tubing holder

¥L Press

¥MPull

Page 24

- 24 -

Connecting cable

Drain hose

Press the lower left and right side of the unit against the Installation Plate until the hooks engage with their slots (sound click).

6. Indoor unit installation.

• Hook the indoor unit onto the upper position of the installation plate. (Engage the two hooks of the rear top of the indoor unit with the upper edge of the installation plate.) Ensure the hooks are properly seated on the installation plate by moving it in left and right.

7. Connecting the pipings to the indoor unit.

• Align the center of the pipings and sufficiently tighten the flare nut with fingers.

• Finally, tighten the flare nut with torque wrench until the wrench clicks. Wrench tightening the flare nut with forque wrench, ensure the direction for tightening follows the arrows on the wrench.

8. Wrap the insulation material around the connecting portion.

CAUTION: Take care to arrange the pipings,

drain hose and cables as the right upper picture for inserting it into the indoor unit and refixing the tubing holder easily.

Pipe Size Torque

Liquid Side (1/4") 1.8kg¡⁄m

Gas Side (3/8") 4.2kg¡⁄m Gas Side (1/2") 5.5kg¡⁄m

Wrap the insulation material around the connecting portion.

Indoor unit tubing Flare nut Pipings

Spanner

Torque wrench

Plastic bands

Insulation material

Page 25

- 25 -

9. Set the pipings and the connecting cable to the back of the chassis with the tubing holder.

• Hook the edge of tubing holder to tap on chas-

sis and push the bottom of tubing holder to be engaged in the bottom of chassis.

10. Indoor unit installation.

• Hook the indoor unit onto the upper portion of

installation plate. (Engage the two hooks of the rear top of the indoor unit with the upper edge of the installation plate.) Ensure the hooks are properly seated on the installation plate by moving it in left and right.

Press the lower left and right side of the unit against the Installation Plate until the hooks engages with their slots (sound click).

Piping

Drain hose

Taping

Tubing holder

Hook

Push

Connecting cable

Drain hose

Page 26

- 26 -

(3) Connecting Pipings and the cable to Outdoor unit

Outdoor unit

A-UNIT

Gas side piping

Liquid side piping

B-UNIT

Torque wrench

1) Connecting the pipings to the Outdoor unit

1. Align the center of the pipings and sufficiently

tighten the flare nut with fingers.

2. 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.

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) The means for disconnection from a power supply shall be incorporated in the fixed wiring and

have an air gap contact separation of at least 3mm in each active(phase) conductors.

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 during 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) See to 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.

Pipe Size Torque

Liquid Side (1/4") 1.8kg.m

Gas Side (3/8") 4.2kg.m Gas Side (1/2") 5.5kg.m

Page 27

- 27 -

1(L) 1(L)2(N) 2(N)

1(L) 2(N)

3 3

Terminal on the OUTDOOR UNIT

Terminal on the INDOOR UNIT

A-UNIT

Terminal on the INDOOR UNIT

A-UNIT

Terminal on the INDOOR UNIT

Power cord

B-UNIT

Terminal on the INDOOR UNIT

B-UNIT

Terminal on the INDOOR UNIT

C-UNIT

3 1(L) 2(N) 3

1(L) 2(N) 3

2(N)1(L)

1(L) 3(B)2(N) 3(A)

1(L) 2(N)

Terminal on the OUTDOOR UNIT

Terminal on the INDOOR UNIT

A-UNIT

Power cord

Terminal on the INDOOR UNIT

B-UNIT

3 1(L) 2(N) 3

1(L) 2(N)

3 1(L) 2(N) 3

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

Terminal on the OUTDOOR UNIT

Terminal on the INDOOR UNIT

A-UNIT

1(L) 2(N)

3 4

Terminal on the INDOOR UNIT

B-UNIT

1(L) 2(N) 3 4

3 2(N)4 1(L)

Outdoor unit

Terminal block

Over 5mm

Cover control

Connecting cable

Power cord

Holder for

power supply

cord

Connection of the cable

Remove the cover control from the unit by loosening the screw. Connect the wires to the terminals on the control board individually as the following.

2. Secure the cable onto the control board with the holder (clamper).

3. Refix the cover control to the original position with the screw.

4. Use a recongnized circuit breaker between the power source and the unit. A disconnection device to adequately disconnect all supply lines must be fitted.

Caution

If a power plug is not to be used, provide a circuit breaker between power source and the unit as shown below.

CAUTION

ø8.5mm

GN/YL

20mm

ø7.5mm

GN/YL

20mm

The power cord connected to the outdoor unit should be complied with the following specifications (Rubber insulation, type H05RN-F approved by HAR or SAA).

The connecting cable connected to the indoor and outdoor unit should be complied with the following specifications (Rubber insulation, type H07RN-F approved by HAR or SAA).

NORMAL CROSSSECTIONAL AREA

0.75mm

NORMAL CROSSSECTIONAL AREA

2.5mm2 or 3.5mm

Air

Conditioner

Air

Conditioner

Circuit Breaker

Use a circuit breaker or time delay fuse. (14K, 15K, 17K, 19K, 20K, 21K)

Main power source

Circuit Breaker

Use a 25A circuit breaker or time delay fuse. (30K)

Page 28

- 28 -

Pull the right and the left side.

Screw

1) Checking the Drainage

1. Remove the Grille from the cabinet

• Set the up-and-down air direction louver to open position(horizontally) by finger pressure.

• Remove the securing screws.

• To remove the Grille, pull lower the left and right side of the grille toward you (slightly tilted) and lift it straight upward.

2. Check the drainage

• Pour a glass of water on the evaporator.

• Ensure if water flows drain hose of indoor unit without any leakage.

(4) Checking the Drainage and Pipe forming

Connecting cable

Page 29

- 29 -

Connecting cable

2) Connect the cable to the indoor unit

1. Connect the wires to the terminals on the control board individually according to the outdoor unit connection.

• Ensure that the color of the wires of outdoor unit and the terminal No. are the same as those of indoor unit respectively.

2. Attach the Grille onto the cabinet.

• Grasp lower the left and right side of the Grille and engage four tabs on the top inside edge of the chassis.

• Press the Grille toward the chassis until it will be back into place.

Terminal on the OUTDOOR UNIT

1(L) 2(N)

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

Power cord

1(L) 2(N)

Terminal on the INDOOR UNIT

A-UNIT

Terminal on the OUTDOOR UNIT

1(L) 1(L)2(N) 2(N)

1(L) 2(N)

Terminal on the INDOOR UNIT

A-UNIT

1(L) 2(N)

Terminal on the INDOOR UNIT

Terminal on the OUTDOOR UNIT 1(L) 3(B)2(N) 3(A)

Power cord

1(L) 2(N)

Terminal on the INDOOR UNIT

3 1(L) 2(N) 3

3 3

3 1(L) 2(N) 3

1(L) 2(N) 3

Terminal on the INDOOR UNIT

Terminal on the OUTDOOR UNIT

3 4

A-UNIT

1(L) 2(N)

3 1(L) 2(N) 3

A-UNIT

Terminal on the INDOOR UNIT

B-UNIT

Terminal on the INDOOR UNIT

B-UNIT

2(N)1(L)

Power cord

Terminal on the INDOOR UNIT

3 2(N)4 1(L)

1(L) 2(N) 3 4

B-UNIT

C-UNIT

Power cord

Page 30

Taping

Drain hose

Pipings

Connecting cable

Plastic band

• Trap is required to prevent water from entering into electrical parts.

Power cord

- 30 -

Seal a small opening around the pipings with gum type sealer.

Trap

3) Form the pipings

1. Wrap the connecting portion of indoor unit with the Insulation material and secure it with two Plastic Bands(for the left pipings).

• If you want to connect an additional drain hose,

the end of the drain-outlet should keep distance from the ground.(Do not dip it into water, and fix it on the wall to avoid swinging in the wind.)

2. Tape the Pipings, drain hose and Connecting Cable from down to up.

3. Form the pipings gathered by taping along the exterior wall and fix it onto the wall by saddle or equivalent.

1. Tape the Pipings and Connectiong cable from down to up.

2. Form the pipings gathered by taping along the exterior wall and the Trap to be required to prevent the room from entering the water.

3. Fix the pipings onto the wall by saddle or equivalent.

In case of the Outdoor unit is installed bellow position of the Indoor unit.

In case of the Outdoor unit is installed upper position of the Indoor unit.

Page 31

- 31 -

(5) Air Purging of the Pipings and indoor unit

The air which contains moisture remaining in the is refrigeration cycle may cause a malfunction on the compressor.

1. Confirm that both the liquid side valve and the gas side valve are set to the closed position.

2. After connecting the piping, check the joints for gas leakage with gas leak detector.

3. Remove the service port nut, and connect the gauge manifold and the vacuum pump to the service port

by the charge hose.

4. Vacuum the indoor unit and the connecting pipes until the pressure in them lowers to below-76cmHg.

5. Disconnect the charge hose and fit the nut to the service port.

(Tightening torque: 1.8kg.m)

6. Remove the valve stem nuts, and fully open the stems of the 2-way and 3-way valves with a hexagon

wrench.

7. Tighten the valve stem nuts of the 2-way valve and 3-way valve.

Indoor unit

Outdoor unit

Liquid side

Gas side

CLOSEOPEN

Vacuum pump

2-way valve

Closed

3-way valve

Page 32

- 32 -

(7) Maximum Length of Pipe and Freon Extra Charge

INDOOR UNIT

OUTDOOR UNIT

B(Length)

D(Length)

A(Height)

C(Height)

Model

Capacity STANDARD

CONNECTION TYPE

Charge am't(g)

(Btu/h) LENGTH(m)

A B C D

per 1m LM-2164H2L 700 7.5 7 15 7 15 20 LM-3064H3L 700 7.5 7 15 7 15 30 LM-2164H2L 1400 7.5 7 15 7 15 40 LM-3064H3L 1400 7.5 7 15 7 15 40

** A, B mean indoor unit higher located than outdoor unit.

C, D mean outdoor unit higher located than indoor unit.

Charge amount per 1m

(6) Preventive function of cable mis-connection(Cooling & Heating)

This product has a preventive function of cable mis-connection. In case of mis-connection (in case that the cables between indoor and outdoor units have not been connected properly), it gives a warning signal of LED flickering 3 minutes after starting operation. (Press the forced operation key more than 3 seconds.)

CAUTION

Don't turn on all the indoor units all at once when you check the connection status. In that case the sensor can not be operated properly.

Once

3 seconds

Twice

3 seconds

Once

3 seconds

Twice

Page 33

- 33 -

(8) Test running

Battery Cover

Settlement of Outdoor Unit

• Anchor the outdoor unit with a bolt and nut

(ø10cm) tightly and horizontally on a concrete or rigid mount.

• When installing on the wall, roof or rooftop,

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

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

veyed to the house, settle the unit with an antivibration rubber.

2) 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.

1) Connection of power supply

1. Connect the power supply cord to the independent power supply.

2. Prepare the remote control.

• Insert two batteries provided. Remove the battery cover from the remote controller.

• Slide the cover according to the arrow direction.

Insert the two batteries. (Two "R03" or "AAA" dry-cell batteries or equivalent.)

• Be sure that the (+) and (-) directions are correct.

• Be sure that both batteries are new.

Re-attach the cover.

• Slide it back into position.

3. Operate the unit at cooling operation mode for fifteen minutes or more.

Bolt

Tubing connection

Discharge air

Page 34

-34-

Operation

(1) Name and Function-Remote Control (Door Closed)

Signal transmitter

Transmits the signals to the room air conditioner.

Remote Control

START/STOP BUTTON

Operation starts when this button is pressed and stops when the button is pressed again.

OPERATION MODE SELECTION BUTTON

Used to select the operation mode.

ROOM TEMPERATURE SETTING BUTTONS

Used to select the room temperature.

INDOOR FAN SPEED SELECTOR

Used to select fan speed in four steps low, medium, high, or CHAOS.

JET COOL

Used to start or stop the speed cooling. (Speed cooling operates super high fan speed in cooling mode.)

CHAOS SWING BUTTON

Used to stop or start louver movement and set the desired up/down airflow direction

234

Signal transmitter

5 4

6 1

Flip-up door

(closed)

Page 35

-35-

(2) Name and Function-Remote Control (Door Opened)

Signal transmitter

Transmits the signals to the room air conditioner.

Remote Control

ON/OFF TIMER BUTTONS

Used to set the time of starting and stopping operation.

TIME SETTING BUTTONS

Used to adjust the time.

TIMER SET/CANCEL BUTTONS

Used to set the timer when the desired time is obtained and to cancel the Timer operation.

SLEEP MODE AUTO BUTTON

Used to set Sleep Mode Auto operation.

AIR CIRCULATION BUTTON

Used to circulate the room air without cooling or heating (turns indoor fan on/off).

ROOM TEMPERATURE CHECKING BUTTON

Used to check the room temperature.

RESET BUTTON

Used prior to resetting time or after replacing batteries.

Signal transmitter

ON OFF

1 2 3

SET

CANCEL

4 5 6 7

Page 36

- 36 -

Disassembly of the parts (Indoor unit)

Warning :

Disconnect the unit from power supply before making any checks. Be sure the power switch is set to “OFF”.

To remove the Grille from the Chassis

• Set the up-and-down air discharge louver to open position (horizontally) by finger pressure.

• Remove the securing screws

• To remove the Grille, pull the lower left and right side of the grille toward you (slightly tilted) and lift it straight upward.

1. To remove the sensor, housing connect, earth

conductor & step motor conductor with sensor holder, Motor, Evaporator & P.C.B.

Screw

Power Conductor

Step Motor Conductor

Earth Conductor

Motor Conductor

Sensor Conductor

Page 37

2. To remove the Control Box

• Remove securing screws.

• Pull the control box out from the chassis carefully.

3. To remove the Discharge Grille

• Pull the discharge grille out from the chassis carefully.

4. To remove the Evaporator

• Remove screws securing the evaporator and the holder eva.

• Unhook the tab on the right inside of the chassis at the same time, slightly pull the evaporator toward you until the tab is clear of the slot.

5. To remove the Cross-Flow Fan

• Loosen the screw securing the cross-flow fan to the fan motor (do not remove).

• Lift up the right side of the cross-flow fan and the fan motor, separate the fan motor from the cross-flow fan.

• Remove the left end of the cross-flow fan from the self-aligning bearing.

- 37 -

Page 38

2-way Valve (Liguid Side) 3-way Valve (Gas Side)

Works Shaft position Shaft position Service port

Shipping Closed Closed Closed

(with valve cap) (with valve cap) (with cap)

Air purging Open Closed Open

(Installation) (counter-clockwise) (clockwise) (push-pin or with

vacuum pump)

Operation Open Open Closed

(with valve cap) (with valve cap) (with cap)

Pumping down Closed Open Open

(Transfering) (clockwise) (counter-clockwise) (connected

manifold gauge)

Evacuation Open Open Open (Servicing) (with charging

cylinder)

Gas charging Open Open Open

(Servicing) (with charging

cylinder)

Pressure check Open Open Open

(Servicing) (with charging

cylinder)

Gas releasing Open Open Open

(Servicing) (with charging

cylinder)

- 38 -

2-way, 3-way Valve

Flare nut

To piping connection

Open position Closed position

Flare nut

Valve cap

To piping connection

Open position Closed position

Hexagonal wrench (4mm)

To outdoor unit

Service port

Service port cap

To outdoor unit

Page 39

(1) Pumping down

• Procedure

1. Confirm that both the gas side and liquid side valves are set to the open position.

- Remove the valve stem caps and confirm that the valve stems are in the raised position.

- Be sure to use a hexagonal wrench to operate the valve stems.

2. Operate the unit for 10 to 15 minutes.

3. Stop operation and wait for 3 minutes, then connect the manifold gauge to the service port of the gas side valve.

- Connect the hose of the gauge with the push pin to the service port.

4. Air purging of the charge hose.

- Open the Low-handle valve on the gauge slightly to air purge from the hose.

5. Set the liquid side valve to the closed position.

6. Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1kg/cm2g.

7. Immediately set the gas side valve to the closed position.

- Do this quickly so that the gauge ends up indicating 1kg/cm2g.

8. Disconnect the charge set, and mount the liquid side and gas side valve caps and the service port nut.

- Use torque wrench to tighten the service port nut to a torque of 1.8kg.m.(4.2kg.m/5.5kg.m)

- Be sure to check for gas leakage.

9. Apply steps from 1 to 8 to each unit (A-unit, Bunit) by the same method.

- 39 -

Indoor unit

Outdoor unit

Liquid side

Gas side

2-Way

valve

Open

3-Way

valve

manifold gauge

Hi- handle (CLOSE)

Low-handle (CLOSE)

Page 40

(2) Evacuation

(All amount of refrigerant leaked)

• Procedure

1. Confirm that both the liguid side valve and gas side valve are set to the opened position.

2. Connect the vaccum pump to the center hose of the manifold gauge.

3. Connect the service port of the gas side valve to the low side of the gauge.

4. Evacuation for approximately one hour.

- Confirm that the gauge needle has moved toward-76 cmHg (vacuum of 4 mmHg or less).

5. Close the Low handle of the gauge turn off the vacuum pump, and confirm that the gauge needle does not move(approximately 5 minutes after turning off the vacuum pump).

6. Disconnect the charge hose from the vacuum pump.

- Vacuum pump oil. If the vacuum pump oil becomes dirty or depleted,replenish as needed.

7. Mount the valve caps and the service port caps.

8. Apply steps from 1 to 7 to each unit (A-unit, Bunit) by the same method.

- 40 -

Indoor unit

Outdoor unit

Liquid side

Gas side

2-Way

valve

Open

3-Way

valve

manifold gauge

Vacuum pump

Hi- handle (CLOSE)

Lowhandle (OPEN)

Page 41

(3) Gas Charging

(After Evacuation)

• Procedure

1. Connect the gauge to the charging cylinder.

- Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.

- If you are using a gas cylinder, also use a scale and reverse the cylinder so that the system can be charged with liquid.

2. Purge the air from the charge hose.

- Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air. (Be careful of the liquid refrigerant). The procedure is the same if using a gas cylinder.

3. Open the low handle on the gauge and charge the system with liquid refrigerant.

- If the system can not be charged with the specified amount of refrigerant, it can be charged with a little at a time (approximately 150g each time) while operating the air conditioner in the cooling cycle; however, one time is not sufficient, wait approximately 1 minute and then repeat the procedure(pumping down-pin).

4. Immediately disconnect the charge hose from the gas side valve's service port.

- Stopping partway will allow the gas to be discharged.

- If the system has been charged with liquid refrigerant while operating the air conditioner turn off the air conditioner before disconnecting the hose.

5. Mount the valve stem nuts and the service port nut.

- Use torque wrench to tighten the service port nut to a torque of 1.8 kg.m.(4.2kg.m/5.5kg.m.)

- Be sure to check for gas leakage.

6. Apply steps from 1 to 5 to each unit (A-unit, Bunit) by the same method.

- 41 -

Indoor unit

Outdoor unit

Liquid side

Gas side

2-Way

valve

Open

3-Way

valve

manifold gauge

Charging

cylinder

Hi- handle (CLOSE)

Low-handle

(OPEN)

Check valve

This is different from previous procedures. Because you are charging with liquid refrigerant from the gas side, absolutely do not attempt to charge with larger amounts of liquid refrigerant while operating the air conditioner.

Page 42

Trouble analysis

1. Check temperature difference between intake and discharge air and operating current.

All amount of refrigerant leaked out. Check refrigeration cycle.

Refrigerant leakage Clog of refrigeration cycle Defective compressor

Excessive amount of refrigerant

Normal

Notice:

Temperature difference between intake and discharge air depends on room air humidity. When the room air humidity is relativery higher, temperature difference is smaller. When the room air humidity is relatively lower temperature difference is larger.

2. Check temperature and pressure of refrigeration cycle.

Notice:

1. The suction pressure is usually 4.5~6.0 kg/cm2G at normal condition.

2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty.

- 42 -

Cycle Troubleshooting Guide

Temp. difference : approx. 0°C Current : less than 80% of

rated current

Temp. difference : approx. 8°C Current : less than 80% of

rated current

Temp. difference : less than 8°C Current : over the rated

current

Temp. difference : over 8°C

Temp. Difference

Operating Current

Suction pressure Temperature

(Compared with (Compared with Cause of Trouble Description

the normal value) the normal value)

High Defective compressor Current is low.

Defective 4-way reverse valve

Normal Excessive amount of High pressure does not quickly

refrigerant rise at the beginning of operation. Insufficient amount of Current is low.

Lower Higher refrigerant(Leakage)

Clogging Current is low.

Higher

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1. Product does not operate at all.

(* Refer to Electronic Control Device drawing and Schematic diagram.)

Electronic Parts Troubleshooting Guide

Turn off Main Power

Turn on Main Power

Does "beeping" sound is made from the Indoor Unit?

Primarily, the operating condition of Micom is OK.

Check the voltage of power(About AC 220V/AC240V, 50Hz)

• Main power's voltage

• Voltage applied to the unit

• Connecting method of Indoor/Outdoor connecting cable

• Check PWB Ass'y

- Fuse

- Pattern damage

- Varistor(ZNR01J)

Check the connection housing for contacting

• Connector related to CN-POWER

• Display PWB Ass'y Check

• Connector related to CN-TAB1,

Compressor (LM-2163C2L/M)

Check each load(Indoor/Outdoor Fan Motor, Compressor, Stepping Motor etc.) and contacting condition of related connector

PCB Board Operation Check

Items

• Power Transformer (Outdoor unit)

- Input Voltage

- Output Voltage

‹X

• IC01D(7812) Output (Indoor/Outdoor unit)

‹X

• IC02D(7805) Output (Indoor/Outdoor unit)

‹X

• IC01A(KIA7036, Reset IC) X01(8MHz)

• Replace Trans

• Replace IC01D

• Replace IC02D

•

Replace faulty parts

- About AC220V/240V±10% - Check the power voltage

- About AC14±3V

• DC +12V

• DC +5V

• Voltage of Micom No. 2, (DC +4.5V over) and Soldering condition.

Content Remedy

YES

(After 10 seconds)

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Turn on Main Power

While the compressor has been stopped, the compressor does not

operate owing to the delaying function for 3 minutes after stopped.

Caused by other parts except the remote control

Cause by the remote control

When the mark( ) is displayed in LCD screen, replace battery.

Check the contact of CN-DISPI connector.

When the compressor stopped Indoor Fan is driven by a low speed. At this point the wind speed is not controlled by the remote controller. (When operated in the Sleeping Mode, the wind speed is set to the low speed by force.)

Check DISP PWB Ass'y

- Voltage between CN DISP1 ¤ - ¤ : DC +5V

When the detect switch(double key) inside the remote controller door is fault, it is impossible to operate

temperature regulating(¡ª/¡ ) and wind speed selecting.

Check the connecting circuit between the remote controller MICOM (No. § ) - R17(2Ω) - IR LED - Q1 -

R16(2.2KΩ).

Check point

• Check the connecting circuit between PIN ¤ŁR01L(1K) - C01L(680PF) - MICOM PIN

• Check Receiver Ass'y

2. The product is not operate with the remote control.

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3. When cooling does not operate

Turn on Main Power

Operate "Cooling Mode( )" by setting the desired temperature of the remote controller is less than one of the indoor temperature by 1°C at least.

When in Air Circulation Mode, Compressor/Outdoor Fan is stopped.

Check the sensor for indoor temperature is attached as close as to be effected by the temperature of Heat Exchanger(EVA).

When the sensor circuit for indoor temperature and connector are in bad connection or are not engaged, Compressor/Outdoor Fan is stopped.

• Check the related circuit of R02H(12.1K), R01H(1.0K), R04H(6.2K), R03H(1.0K) (Indoor unit).

• Check the indoor temperature sensor is disconnected or not(About 10k Ω/ at 25°C).

Check Outdoor Unit

Check Relay(RY - COMP) for driving compressor.

• When the power(About AC220V/240V) is applied to the connecting wire terminal support transferred to compressor, PWB Ass'y is normal.

• Check the circuit related to the relay.

Check point COMP ON COMP OFF

Below DC 1V

About DC12V

(app)

Between two pin of DC part in relay for COMP

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Check the SSR high speed operation by remote control.

(The Indoor Fan Motor is connected)

Turn off Main power

Check the connection of CN-FAN or CN-MOTOR

Check the Fan Motor

Check the Fuse(AC250V/T2A)

Turn ON Main Power

Check the related circuit of indoor Fan Motor.

• The pin of Micom, and the part for driving SSR

• Check the pattern

• Check the SSR

- SSR Open: Indoor Fan Motor never operate

- SSR short: Indoor Fan Motor always operates in case of ON or OFF.

4. When indoor Fan does not operate.

The voltage of PIN NO 1(blue) and 3(yellow) of CN-FAN or CN-MOTOR.

About AC 180V over About AC 50V over

SSR is not damaged SSR Check

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• Confirm that the Vertical Louver is normally geared with the shaft of Stepping Motor.

• If the regular torque is detected when rotating the Vertical Louver with hands ¢¡ Normal

• Check the connecting condition of CN-U/D Connector

• Check the soldering condition(on PWB) of CN-U/D Connector

If there are no problems after above checks

• Confirm the assembly conditions that are catching and interfering parts in the rotation radial of the Vertical Louver

5. When Vertical Louver does not operate.

Check the operating circuit of the Vertical Louver

• Confirm that there is DC +12V between pin ¤ (RED) of CN-U/D and

GND.

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6. When Heating does not operate

Operate “Heating Mode( )” by setting the desired temperature of the remote control is higher than one of the indoor temperature by 2°C at least.

In heating Mode, the indoor fan operates in case the pipe temperature is higher than 28°C.

Check Outdoor Unit

Check the connector of intake and pipe sensor(thermistors)

• Check the related circuit of R02H(12.1K), R01H(1.0K), R04H(6.2K),

R03H(1.0K).

• Check the indoor room temperature is disconnected or not (about

10KΩ/at 25°C).

• Check the indoor pipe temperature is disconnected or not (about

5KΩ/at 25°C).

Turn ON Main Power

Check the DC voltage on the PWB ASS’Y

• The details of check are as followings

Check point

Between two pin

of DC part in relay

for COMP.

Comp ON

Below DC 1V

Comp OFF

About DC

12V

Check point

Between two pin

of DC part in relay

for 4-way.

4-Way ON

Below DC 1V

4-Way OFF

About DC 12V

• Comp Relay. • 4-Way Relay

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PCB Board Operation Check in Outdoor

Items

• Power Transformer (Outdoor unit)

- Input Voltage

- Output Voltage

‹X

• IC01D(7812) Output (Indoor/Outdoor unit)

‹X

• IC02D(7805) Output (Indoor/Outdoor unit)

‹X

• IC01A(KIA7036, Reset IC) X01(8MHz)

• Replace Trans

• Replace IC01D

• Replace IC02D

•

Replace faulty parts

- About AC220V/240V±10% - Check the power voltage

- About AC14±3V

• DC +12V

• DC +5V

Content Remedy

7. Outdoor unit does not operate at all.

8. Communication error

• The control data can be transmitted or received between indoor and outdoor unit with one signal cable.

• If the data be disturbed by any noise level, the unit will be operated incorrectly. In this case, the indoor unit blinks the operation and operation LED on display and indoor fan, outdoor fan, COMP are not operated.

• The unit can be reoperated by On/Off control of Remocon.

Check Outdoor Unit

Turn off Main Power

• Check the electrical wiring diagram of outdoor side.

• Check the abnormal condition for the component of Compressor/Outdoor Fan Motor/4-way.

• Check the “open” or “short” of connecting wires between indoor and outdoor.

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Electronic Control Device

1. Indoor Unit

• MAIN P.C.B ASSY(LM-2164H2L/M, LM-3064H3L/M)

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2. Outdoor Unit

• MAIN P.C.B ASSY(LM-2164H2L/M, LM-3064H3L/M)

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3. Display Ass'y

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1. Indoor Unint (LM-2164H2L/M, LM-3064H3L/M)

Schematic Diagram

Page 54

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2. Outdoor Unit (LM-2164H2L/M, LM-3064H3L/M)

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Exploded View & Replacement Parts List

30 27

5 3 1

1. Indoor Unit

• LM-2164H2L/M, LM-3064H3L/M(7K Btu Models)

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1 3300A10002A PLATE INSTALLATION 1 1 2 3H03651A HOLDER TUBE 1 1 3 3H03652A COVER, TUBE 1 1 4 4681A20003C MOTOR, BLOWER 1 1 5 3141A20001B CHASSIS ASSY 1 1 6 5901AR6141A CROSS FLOW FAN 1 1 7 3H02821A BEARING ASSY 1 1 8 4930AR6138A HOLDER, EVA 1 1

5421AR6176K EVAPORTATOR ASSY 1 5421AR1576A EVAPORTATOR ASSY 1

5421AR6175C EVAPORATOR 1

5421AR1575A EVAPORATOR 1 H/TUBE

5211AR7288C TUBING ASSY 1

5211AR7288A TUBING ASSY 1 12 4010AR3071A SOCKET FLARE 1 1 13 3A00375D SOCKET FLARE 1 1

4995A20024P CONTROLLER ASSY 1

4995A20024N CONTROLLER ASSY 1 15 4994AR0011A CONTROL BOARD 1 1 16 3H01487A SH CAPACITOR 1 1

6871A20075A PWB(PCB)ASSY, MAIN 1

6871A20075B PWB(PCB)ASSY, MAIN 1 18 6640AR7043B PILLAR TERMINAL 1 1 19 6323AQ2333A THERMISTOR ASSY 1 1 20 6871A30009C PWB(PCB) ASSY, DISPLAY 1 1 21 3531A10005A DISCHARGE GRILLE ASSY 1 1 22 5008AR1573A DISCHARGE GRILLE 1 1 23 5990AR7225A VANE 1 1 24 4681AR2727H STEPPING MOTOR 1 1 25 5251AR2575A DRAIN HOSE ASSY 1 1 26 3531A20003B INLET GRILLE 1 1 27 3531A10001X FRONT GRILLE ASSY 1 1 28 3530AR1576A FRONT GRILLE 1 1 29 3550AR3724G COVER CONTROL 1 1 30 6711A20010B REMOTE CONTROL ASSY 1 1 31 5230AR2630A FILTER ASSY 2 2

No. PART No. DESCRIPTION

QUANTITY

REMARK

B UNIT B/C UNIT

LM-2164H2L/M LM-3064H3L/M

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• LM-2164H2L/M, LM-3064H3L/M(14K Btu Models)

5 3 1

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1 1H00843A PLATE INSTALLATION 1 1 2 3H03651A HOLDER, TUBE 1 1 3 3H03652A COVER 1 1 4 4681A20003T MOTOR, BLOWER 1 1 5 3141A20003D CHASSIS ASSY 1 1 6 5901AR6141B CROSS FLOW FAN 1 1 7 3H02821B BEARING ASSY 1 1 8 4930AR6138A HOLDER, EVA 1 1

9 5421A20031E EVAPORATOR ASSY 1 1 10 5421A20032A EVAPORATOR 1 1 11 2H02449J TUBING ASSY 1 1 12 3H01420A SOCKET FLARE 1 1 13 3A00375D SOCKET FLARE 1 1 14 4995A20082G CONTROLLER ASSY 1 1 15 4994A00001A CONTROL BOARD 1 1 16 3H01487A SH CAPACITOR 1 1 17 6871A20075J PWB(PCB) ASSY, MAIN 1 1 18 6640AR7043B TERMINAL BLOCK 1 1 19 6323AQ2333A THERMISTOR ASSY 1 1 20 6871A30009E PWB(PCB) ASSY, DISPLAY 1 1 21 3531A10023B DISCHARGE GRILLE ASSY 1 1 22 3530A10018A DISCHARGE GRILLE 1 1 23 5990A30006A VANE 1 1 24 5990A30007A VANE 1 1 25 4681AR2727H STEPPING MOTOR 1 1 26 5251AR2575A HOSE ASSY, DRAIN 1 1 27 3531A20028C GRILLE, INLET 1 1 28 3531A10024L FRONT GRILLE ASSY 1 1 29 3530A10020B FRONT GRILLE 1 1 30 3550A30035F COVER CONTROL 1 1 31 6711A20010B REMOTE CONTROLLER 1 1 32 5230A20004A FILTER ASSY 2 2

No. PART No. DESCRIPTION

QUANTITY

REMARK

A UNIT A UNIT

LM-2164H2L/M LM-3064H3L/M

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2. Outdoor Unit

• LM-2164H2L/M

26 25

232324

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1 3041AP2741H BASE ASSY(OUTDOOR) 1

2 5403AP2740W CONDENSER ASSY, BENT 1

3 4A01556A HOLDER(COND) 2

4 2520UMLP2AA COMPRESSOR SET 1

5 2520UKCP2BA COMPRESSOR SET 1

6 4H00982E ISOLATOR, COMP 3

7 4984AR4361A ISOLATOR, COMP 3

8 4986U-L001G GASKET 2

9 6750U-L027A O.L.P. 1 10 6750U-L013A O.L.P. 1 11 4790U-L002A SPRING 2 12 3550U-L002D COVER, TERMINAL 2 13 4H00947A NUT, HEXAGON FLANGE 2 14 4H01811C BRACKET, WASHER 3 15 4810AR4155A BRACKET, WASHER 3 16 1NHA0801206 NUTS HEXAGON[1] 6 17 3A02027A VALVE, REVERSING 1 18 5220AR3084A VALVE, REVERSING 1 19 6141AR3509C COIL ASSY, REVERSING VALVE 1 20 6141AR3509D COIL ASSY, REVERSING VALVE 1 21 4908AR1016D SUPPORTER 1 22 2H01890D VALVE SERVICE(1/2") 1 23 2H02479D VALVE SERVICE(1/4") 2 24 2A00393S VALVE SERVICE(3/8") 1 25 1A00207B GRILLE, REAR 1 26 1A00201D PANEL ASSY, SIDE 1 27 3A02284M PANEL ASSY, SIDE 1 28 2A00982A PANEL, CONTROL 1 29 6120AR2194F CAPACITOR 1 30 2A0986G CAPACITOR 1 31 4H00442P CLAMP, CAPACITOR 1 32 3A00093A TERMINAL BLOCK 1 33 3A00390A TERMINAL BLOCK 1 34 4H01050A CLIP 2 35 4H02958A CLAMP, CORD 1 36 6871A20031J PWB(PCB) ASSY, MAIN 1 37 6171AQ3198A TRANSFORMER, POWER 1 38 6323A20002A THERMISTOR ASSY 1 39 4960AP1361A MOUNT, MOTOR 1 40 4681A20013A MOTOR ASSY, AC 1

No. PART No. DESCRIPTION

QUANTITY

REMARK

LM-2164H2L/M

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41 1A00195B FAN ASSY, PROPELLER 1 42 1WPA0800014 WASHER, PLAIN 1 43 1NHA0801206 NUTS HEXAGON[1] 1 44 3721A20004E PANEL ASSY, FRONT 1 45 4948AP2527A ORIFICE 1 46 3530A20007B GRILLE ASSY, DISCHARGE 1 47 3H03653B SCREW 6 48 3H03266L COVER ASSY, TOP 1 49 479130004A BARRIER ASSY, OUTDOOR 1 50 3551AP7042D COVER ASSY, CONTROL 1

No. PART No. DESCRIPTION

QUANTITY

REMARK

LM-2164H2L/M

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• LM-3064H3L/M

25 24

181917

131210

Page 63

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1 3041AP7177B BASE ASSY(OUTDOOR) 1 2 6140AP2096A CONDENSER ASSY, BENT 1 3 4A01556A HOLDER(COND) 2 4 2520UMLP2AA COMPRESSOR SET 1 5 2520UMLP2CA COMPRESSOR SET 1 6 4H00982E ISOLATOR, COMP 6 7 4986U-L001G GASKET 2 8 6750U-L027A O.L.P. 2

9 4790U-L002A SPRING 2 10 3550U-L002D COVER, TERMINAL 2 11 4H00947A NUT, HEXAGON FLANGE 2 12 4H01811C BRACKET, WASHER 6 13 1NHA0801206 NUTS HEXAGON[1] 6 14 3A02027A VALVE, REVERSING 2 15 6141AR3509B COIL ASSY, REVERSING VALVE 1 16 6141AR3509C COIL ASSY, REVERSING VALVE 1 17 5220A90002A VALVE, SOLENOID 2 18 6421A20001A SOLENOID ASSY 1 19 6421A20001B SOLENOID ASSY 1 20 4908AR1016E SUPPORTER 1 21 2H01890D VALVE SERVICE(1/2") 1 22 2H02479D VALVE SERVICE(1/4") 3 23 2A00393S VALVE SERVICE(3/8") 2 24 1A00208D GRILLE, REAR 1 25 1A00201D PANEL ASSY, SIDE 1 26 3A02284R PANEL ASSY, SIDE 1 27 2A00929A PANEL, CONTROL 1 28 6120AR2194F CAPACITOR 1 29 2A0988B CAPACITOR 1 30 4H00442C CLAMP, CAPACITOR 1 31 3A00093A TERMINAL BLOCK 1 32 3A00390A TERMINAL BLOCK 1 33 3A00390B TERMINAL BLOCK 1 34 4H01050A CLIP 2 35 4H02958A CLAMP, CORD 1 36 6871A20031L PWB(PCB) ASSY, MAIN 1 37 6171AQ3198A TRANSFORMER, POWER 1 38 6323A20002A THERMISTOR ASSY 1 39 3Q35027H THERMISTOR ASSY 1 40 1A00206B MOUNT MOTOR 1

No. PART No. DESCRIPTION

QUANTITY

REMARK

LM-3064H3L/M

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41 3A01394A BRACKET 1 42 4681A20008N MOTOR ASSY, AC 1 43 1A00195B FAN ASSY, PROPELLER 1 44 1WPA0800014 WASHER, PLAIN 1 45 1NHA0801206 NUTS HEXAGON[1] 1 46 1A00197C PANEL ASSY, FRONT 1 47 4948AP2527A ORIFICE 1 48 3530A20007B GRILLE ASSY, DISCHARGE 1 49 3H03653B SCREW 6 50 3H03266H COVER ASSY, TOP 1 51 4791A30004B BARRIER ASSY, OUTDOOR 1 52 3551A30028B COVER ASSY, CONTROL 1

No. PART No. DESCRIPTION

QUANTITY

REMARK

LM-3064H3L/M

Page 65

P/No.: 3828A30074S

April, 2000

Printed in Korea

LG LM-2164H2L, LM-3064H3L Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual