LG LP-K2060CL/CA, LP-K3020CL/CA, LP-K4020CL/CA, LP-K3060CL/CA Service Manual

Package
Air Conditioner

SERVICE MANUAL

MODEL: LP-K2060CL/CA

LP-K3060CL/CA
LP-K3020CL/CA
LP-K4020CL/CA

Contents

Functions 3
Product Specifications (Cooling Model only) 5
Dimensions 6
Refrigeration Cycle Diagram 6
Wiring Diagram 7
Operation Details 9
Installation of Indoor, Outdoor Unit 14
Test Running 24
3-way Valve 26
Cycle Troubleshooting Guide 31
Electronic Parts Troubleshooting Guide 32
Electronic Control Device 33
Schematic Diagram 34
Exploded View and Replacement Parts List 35

–2–

–3–

Indoor Unit

Power Switch ON/OFF

Operation Mode Control

Indoor Fan Speed Control

Jet Cool

Energy Saving

Room Temperature control

Auto Operation

Soft Dry Operation Mode

Time Delay Safety Control

Fan Operation

AutoRestart

• Cooling, Auto, Soft Dry

• High, Low

• Speed Cooling operates super high fan speed in cooling mode

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

• Up: up to 30°C

• Down: down to 16°C

• The setting temperature, indoor fan speed and desired operation mode are automatically set.

• Intermittent operation of fan at low speed.

• Restarting is inhibited for approx. 3 minutes.

• Used to circulate room air without cooling.

• The power comes on again after a power failure.

Functions

–4–

• The setting temperature indoor fan speed and desired operation mode are automatically set.

• Intermittent operation of fan at low speed.

• Used to circulate room air without cooling.

• OFF Timer (1, 2, 3,......7 hour)

• Speed cooling operates super high fan speed in cooling mode.

• Airflow direction Auto-swing and Manual Contol.

• Up: up to 30°C

• Down: down to 16°C

• High, Low

Remote Control

Operation ON/OFF

Cooling Operation Mode

Auto Operation Mode

Sot Dry Operation Mode

Fan Operation

Timer Control

Jet Cool

Energy Saving

Airflow Direction Control

Room Temperature Control

Indoor Fan speed control

Product Specifications (Cooling model only)

–5–

POWER SUPPLY Ø, V, Hz
COOLING CAPACITY Btu/hr
HEATING CAPACITY Btu/hr

(Incl. elec. Heater)
POWER INPUT COOLING W

HEATING W
RUNNING COOLING A
CURRENT HEATING A

MODEL

MAKER

TYPE
COMPRESSOR CAPACITY Btu/hr

INPUT (KW)

LRA A
NOISE LEVEL INDOOR dB(A)

OUTDOOR dB(A)
AIR INDOOR

CFM/CMM

CIRCULATION OUTDOOR

CFM/CMM
REFRIGERANT (R-22) OZ(kg)
HEAT INDOOR R/C/FPI
EXCHANGER OUTDOOR R/C/FPI
FAN INDOOR TYPE

OUTDOOR TYPE

ROOM TEMPERATURE CONTROL

WIDTH

INDOOR HEIGHT inch(mm)

DEPTH
WIDTH

OUTDOOR HEIGHT inch(mm)

DEPTH

NET WEIGHT

INDOOR Ib(kg)
OUTDOOR Ib(kg)

CONNECTIONS

LIQUID inch(mm)
GAS inch(mm)

1, 220-240, 50

27,800

-

3,000

-

14.5

-

H25B35QABHA

BRISTOL

RECIPRO

30,200

2.83
85
48
58

670/19

2,046/58

63.5(1.8)
3/22/18
2/24/18

SIROCO

PROPELLER

MICOM CONTROL

19.68(500)

70.86(1800)

12.59(320)

34.25(870)

25.78(655)

12.59(320)

88.18(40)

138.6(63)

3/8"(Ø9.52)

5/8"(Ø15.88)

1, 220,60

36,000

-

3,500

-

17

-

CR38K6-PFV-502

COPELAND

RECIPRO

38,200

3.52
102

52
62

741/21

2,225/63

84.6(2.4)
3/22/18
2/30/18

SIROCO

PROPELLER

MICOM CONTROL

19.68(500)

70.86(1800)

12.59(320)

34.25(870)

31.49(800)

12.59(320)

88.18(40)

147.7(67)

3/8"(Ø9.52)

5/8"(Ø15.88)

ITEMS

UNIT

MODEL

LP-K4020CL/CALP-K3060CL/CA

D

I
M
E
N
S

I
O
N
S

Dimensions

Indoor Unit

Air Outlet Vent

Remote Signal
Receptor

Air Intake Vent

Air Intake Vent

(Rear)

Air Outlet

Vent

INDOOR UNIT OUTDOOR UNIT

HEAT
EXCHANGER

HEAT
EXCHANGER

COMPRESSOR

GAS SIDE

LIQUID SIDE

COOLING
HEATING

REVERSING
VALVE

CHECK VALVE

CAPILLARY TUBE

CAPILLARY TUBE

BY PATH CAPILLARY TUBE

–6–

Outdoor Unit

Refrigeration Cycle Diagram

Wiring Diagram

(1) • LP-K3060CL/CA

LP-K3020CL/CA

INDOOR UNIT OUTDOOR UNIT

DISPLAY
PCB ASM

CA MODEL

MAIN PCB ASM

RY-S/HIGH

RY-AIRC

BK

CN-DISP(1) CN-DISP(2)

CN1 CN2

ROOM

TH

DOOR S/W

BK

RD

BK
WH
RD

HVB
ASM

A/CL
UNIT

OR

BR YL

Ci

WH
BK
BL
RD

GN/YL

RY-COMP

RY-SYNC

(250V/3A)

SM

EVAP

TH

RY-HIGH
RY-MID
RY-LO

RD

GN/YL

WH
BK

BK

GN/YL

BL
BR

FUSE

CN-GND

GN/YL

P/No.; 3854A90012Q

CIRCUIT DIAGRAM

FAN

MOTER

COMP.

POWER
RELAY

POWER INPUT

HIDDEN LINE:FIELD WIRING

(CONNETING CABLE)

CAPACITOR

BR

BR

BR

BL

BR

OR

BR
BL

BL

TERMINAL
BLOCK(6P)

1

F1

F2

2 3 4

GN/YL

5 6

BL BK

BK

BL

BL

BK

BK

BR

C

R

S

RD BL

OR YL

GN/YL

2 6
4 801

CAPACITOR

FAN

MOTOR

NOTE

BL
BK
BR
RD
OR
WH
YL
GN/YL:GREEN/YELLOW

BLUE
BLACK
BROWN
RED
ORANGE
WHITE
YELLOW

:
:
:
:
:
:
:

–7–

Wiring Diagram

(2) Indoor Unit

• LP-K4020CL

(3) Outdoor Unit

• LP-K4020CL

–8–

NOTE

SM
Ci
FMi
THi
Co
FMo
Cr
52C
Tmo1,2
CM
63H

SYNCHRONOUS MOTOR
CAPACITOR FOR FAN(INDOOR)
INDOOR FAN MOTOR
THERMISTOR FOR INDOOR TEMP.
CAPACITOR FOR FAN(OUTDOOR)
OUTDOOR FAN MOTOR
RUN CAPACITOR FOR COMP.
MAGNATIC CONTACTOR
TERMINAL BLOCK(OUTDOOR)
COMPRESSOR MOTOR
HIGH PRESSURE SWITCH

NOTE

RD
BL
BK
WH
GY

RED
BLUE
BLACK
WHITE
GRAY

:
:
:
:
:

BR
VT
GN
OR
GN

BROWN
VIOLET
GREEN
ORANGE
GREEN/YELLOW

:
:
:
:
/YL :

FIELD WIRING

INDOOR UNIT CIRCUT DIAGRAM

DISPLAY
PCB ASM

RY-SH

OR

BR YL

Ci

WH

BK
BL

RY-COMP

RY-SYNC

(250V 3A)

SM

FMi

THi

RY-H
RY-MID

BK

WH

RD

BK
WH
RD

FUSE

CONNECT TO

OUTDOOR UNIT

NOTE

CM
Co

FMo
Cr
52C
Tmo1,2
63H

COMPRESSOR MOTOR
CAPACITOR FOR FAN
(OUTDOOR)
OUTDOOR FAN MOTOR
RUN CAPACITOR FOR COMP.
MAGNATIC CONTACTOR
TERMINAL BLOCK(OUTDOOR)
HIGH PRESSURE SWITCH

RD
BL
BK
WH
GY

RED
BLUE
BLACK
WHITE
GRAY

:
:
:
:
:

BR
VT
GN
OR
GN

BROWN
VIOLET
GREEN
ORANGE
GREEN/YELLOW

:
:
:
:
/YL :

FIELD WIRING

OUTDOOR UNIT CIRCUT DIAGRAM

CONNECT TO
INDOOR UNIT

P/No.: 3854AP2708P

CM

POWER SUPPLY

1ø, 220V, 60Hz

Tmo1

1 2 3 4 5 6

L1T1L2

T2

52C

B

A

FMo

OR

RD

WH

BR

BK

BK

WH

WH

Tmo2

RD

RDWHBK

WH

GN/YL

RD

RD

BK

BK

63H

FUSE

250V

5 A

WH

R

S

C

WH

PTCR

Cr

BK

BK YL

Co

FUSE

250V

5 A

BR

OR

(CAUTION)

1. This product is only for 1ø, 220V, 60Hz.

2. "Check List" before test run.
1st: Reconfirm the wiring connecting of compresssor,

outdoor unit motor.

2st: Fasten the screw of Terminal block

'Tmo1' once more.

–9–

(1) The function of main control

1. Time Delay Safety Control

ƒU3min¡ƒ The compressor is ceased for 3 minutes to balance the pressure in the refrigeration cycle.

(Protection of compressor)

ƒU3sec¡ƒ The indoor fan is ceased for 3 seconds to prevent relay noise.

(Protection of fan relay and micro chip)

ƒU30sec¡ƒThe 4-way valve is ceased for 30 sec. to prevent the refrigerant-gas abnormal noise when the Heating

operation is OFF or switched to the other operation mode.

2. Airflow Direction Control

ƒUThis function is to swing the louver left and right automatically and to set it at the desired position.
ƒUThe procedure is as the following.

1st : Press the ON/OFF Button to operate the product.
2nd : Press the Airflow Direction Control Button to swing the louver left and right automatically.

(Remote controller)

3rd : Repress the Airflow Direction Control Button to set the louver as the desired position.

(Remote controller)

ƒU8HP Model don't have this function.

3. Cooling Mode Operation

ƒUWhen selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the

controller and the operation diagram is as following.

Intake Air temp.

Setting Temp. +1°C

(Compressor ON)

Setting Temp. -1°C
(Compressor OFF)

Indoor Fan Speed

Selecting

fan speed

Selecting

fan speed

Selecting

fan speed

Selecting

fan speed

Selecting

fan speed

3 minutes

More than

3 minutes

More than

Compressor ON OFF ON OFF ON

Operation Details

–10–

4. Auto Operation (Cooling Model only)

ƒUThe operation procedure is as following.

ƒUAuto Operation for Cooling

Press Start/Stop Button

Select Auto Operation Mode

Check the Room temperature

Operation Condition Intake-air Temperature Setting temperature Fan speed

Over 26°C 25°C
Over 24°C~below 25.5°C Intake air -1.0°C
Over 22°C~below 23.5°C Intake air -0.5°C

below 21.5°C Intake air Temperature(18°C, MAX)

When Switch to

Auto Operation

Controlled

by Fuzzy logic

Intake Air Temp.

Indoor Fan Speed

Compressor ON OFF

Fuzzy Speed

ON OFF

Setting Temp. +1°C

(Compressor ON)

Setting Temp. -1°C
(Compressor OFF)

3 minutes

More than

3 minutes

More than

5. Off Timer Function

This function is to set the time of stopping the unit operation.
The procedure is as the following.

1st: Press the timer set button on the Remocon.
2nd: The buzzer sounds and then the display window shows the Off-Time to be set as

- The Off-Time is shifted as the following by each press.

- If you select ' ', the Off-Timer function will be cancelled.

- During Off-Timer Operation, if you repress the timer set button, the rest time will be displayed.

....

–11–

9. Child Lock function

This function is to operate Air conditioner only by Remocon.
The procedure is as the following
1st: Press the 2 buttons of the temperature control simultaneously, to raise-to lower on the Display Panel of the

product for more 3 seconds.

2nd: The buzzer sounds and then the window of Display Panel shows

CCLL

(CL) mark.

3rd: To release this function, the reverse again the operating procedure could be done.
❈ During this function is operating, any buttons of Display Panel don't work. But it is possible to operate with

Remote controller.

7. Protection of the evaporator pipe from frosting

• Compressor and outdoor fan stop when indoor pipe temperature is below -2°C and restart at the pipe temperature
is above 12°C.

8. Air Purifying Operation(CA Model only)

6. Soft Dry Operation Mode

• During Soft Dry Operation, the compressor ON temperature is the setting temperature plus 2°C, the compressor

OFF temperature is the setting temperature minus 1°C.

• When the room temperature rises over the compressor ON temperature, the operation mode is switched to the Cool-

ing mode.

• When the room temperature falls between the compressor ON temperature and OFF temperature, the operation

mode is switched to the Soft Dry Operation.

• The operation diagram is shown below.

Intake Air Temp.

Indoor Fan Speed

LOW

Selecting

fan speed

Selecting

fan speed

LOW LOW LOW LOW

Compressor OFFON ONON OFF OFF ON

LOW

OFF

Setting Temp. +2°C

(Compressor ON)

Setting Temp. -1°C

(Compresso OFF)

Operation

Cooling

Cooling

operation

Dry operation

3 min. 3 min.

10 min.

maximum

7 min.

maximum

10 min.

Mode Selecting

Operating Mode

Fan Speed

Outdoor OFF

Initial Starting
of Air purifying
Operation

- Low at the initial

- But could be
switched to Med.
Hi

OFF

- Outdoor not operating

- Fan operating + Air puri­fying operating

Repress Air

purifying

Button or

ON/OFF

Button

When switched
to Air purifying
operation

Selecting Speed
of Main Operating
Mode

ON or OFF
depend on
main operat­ing

- Outdoor operating

- Main Operating +
Air purifying operating

10. Alarm mode display / only displayed while operating.

CCOO

: The sensor for sensing room temperature is open or short.

11. Jet Cool

❏ During the JET COOL function at any moment, the A/C starts to blow the cool air at extremely high speed

setting the room temp. automatically to 18°C. It is especially used to cool the room temp. in the shortest time
in a hot summer.
In heat pump mode or neuro fuzzy mode however, the JET COOL function is not available.

❏ You can select this function during the operation of Cooling/ Soft Dry/ Auto/ Fan.
❏ When it is selected, JET COOL lamp is on immediately and fan speed graphic(red) is on 3 times off.
❏ Possible to select or cancel using JET COOL key.
❏ To cancel the JET COOL Mode, press the JET COOL button again or the Fan Speed button or the Room

Temperature Setting button and the unit will operate in high Fan speed on Cooling mode(set up to 18°C).

❏ During the operation when it stops and runs again setting up is high fan speed on cooling mode(set up to

18°C).

12. Energy Saving

➀ If setting temperature of starting energy saving operation is under 22°C, first, setting temperature it up to

22°C and perform energy saving operation.

➁ After energy saving operation starts, if adaptation time of the human body pass from the point which room

temperature and setting temperature meet together, increase setting temperature 1°C more.

➂ If it doesn't satisfy number ➀ even in 50 minutes from the start of energy saving operation, increase 1°C.
➃ After increasing setting temperature 1°C more by number ➀, ➁, perform number ➁, ➂ again, if setting tem-

perature goes up to 25°C, maintain this temperature.

➄ If setting temperature goes down to under 25°C, during the operation, do number ➁, ➂, ➃ again.

13. AUTO RESTART

In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate
procedures automatically to the previous operating conditions.

In case the air conditioner does not receive any signal from the remote control, it will turn off automatically after
7 hours.

–12–

Setting energy

saving operation

Setting temp.

23˚C

21˚C

22˚C

23˚C

24˚C

25˚C

26˚C

27˚C

Setting temp.

24˚C

Setting temp.

25˚C

maintains setting temp.

25˚C

28min.

50min. 50min. 50min.

35min. 47min.

14. Function for test operation

1) Outline of Operation

- This is for checking the condition of installation during the installation, and it is operated by cooling, Fan
speed is high, comp. on, and Auto air flow operations without setting temperature.

2) Operation or Cancel

- Do test operation, if you push ON/OFF button and the down room temperature checking button over 3 sec­onds at the same time.

- During the operation, if you push the stop button or push ON/OFF button and the down room temperature
checking button over 3 seconds at the same time, the test operation will be cancelled and unit come to rest.

- During the operation, if you input remocon key or key on Display panel, it performs its duties.

3) Function

- It operates cooling, fan speed is high, comp. on for 18 ± 1 minutes, regardless of room temperature.

- After 18 ± 1 minutes of operation, it becomes off itself.

- During the operation, signal

8888

stands for "

LLoo

"

–13–