LG LP6000ER Schematic
Room Air Conditioner
SERVICE MANUAL
CAUTION
- BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
- ONLY FOR AUTHORIZED SERVICE.
MODEL: LP6000ER
LP7000R
WEBSITE http://biz.LGservice.com
E-MAIL http://www.LGEservice.com/techsup.html
—2—
1. PREFACE
1.1 SAFETY PRECAUTIONS................................2
1.2 INSULATION RESISTANCE TEST.................2
1.3 SPECIFICATIONS...........................................3
1.4 FEATURES......................................................4
1.5 CONTROL LOCATIONS .................................4
2.
DISASSEMBLY INSTRUCTIONS
2.1 MECHANICAL PARTS....................................5
2.1.1 FRONT GRILLE .....................................5
2.1.2 TOP COVER ..........................................5
2.1.3 CABINET................................................5
2.1.4 CONTROL BOX .....................................5
2.2 AIR HANDLING PARTS ..................................6
2.2.1 AIR GUIDE AND CROSS FLOW FAN...6
2.2.2 FAN AND SHROUD ...............................6
2.2.3 INDOOR FAN MOTOR...........................7
2.2.4 AIR GUIDE LOWER...............................7
2.3 ELECTRICAL PARTS......................................7
2.3.1 OVERLOAD PROTECTOR....................7
2.3.2 COMPRESSOR......................................7
2.3.3 CAPACITOR...........................................8
2.3.4 POWER CORD ......................................8
2.3.5 OUTDOOR MOTOR...............................9
2.4 REFRIGERATION CYCLE..............................9
2.4.1 CONDENSER.........................................9
2.4.2 EVAPORATOR.......................................9
2.4.3 CAPILLARY TUBE.................................9
3.
INSTALLATION
3.1 HOW TO INSTALL THE UNIT.......................12
3.2 CHECKING INSTALLATION.........................12
3.3 WINDOW REQUIREMENTS.........................12
3.4 INSTALLATION KITS CONTENTS ...............12
3.5 SUGGESTED TOOL REQUIREMENTS .......13
3.6 HOW TO INSTALL ........................................13
3.7 REMOVAL FROM WINDOW.........................16
4.
TROUBLESHOOTING GUIDE
4.1 OUTSIDE DIMENSIONS...............................16
4.2 PIPING SYSTEM...........................................17
4.3 TROUBLESHOOTING GUIDE......................18
5. SCHEMATIC DIAGRAM
5.1 CIRCUIT DIAGRAM ......................................27
5.2 ELECTRONIC CONTROL DEVICE...............28
5.3
COMPONENTS LOCATION(FOR AC P.C.B ASM)
...
29
5.4
COMPONENTS LOCATION(FOR DC P.C.B ASM)
..29
6. EXPLODED VIEW..................................30
7. REPLACEMENT PARTS LIST........31
1. PREFACE
This
SERVICE MANUAL provides various service information, including the mechanical and electrical
parts etc. This room air conditioner was manufactured and assembled under a strict quality control system.
The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit.
1.1 SAFETY PRECAUTIONS
1. When servicing the unit, set the ROTARY SWITCH
or POWER SWITCH to OFF and unplug the power
cord.
2. Observe the original lead dress.
If a short circuit is found, replace all parts which
have been overheated or damaged by the short
circuit.
3. After servicing the unit, make an insulation resistance test to protect the customer from being
exposed to shock hazards.
1.2
INSULATION RESISTANCE TEST
1.Unplug the power cord and connect a jumper
between 2 pins (black and white).
2. The grounding conductor (green) is to be open.
3. Measure the resistance value with an ohm meter
between the jumpered lead and each exposed
metallic part on the equipment at all the positions
(except OFF) of the ROTARY SWITCH.
4. The value should be over 1MΩ.
CONTENTS
—3—
POWER SUPPLY
COOLING CAPACITY (Btu/h)
INPUT (W)
RUNNING CURRENT (A)
E.E.R (BTU/W.h)
INDOOR (°C)
OUTDOOR (°C)
REFRIGERANT (R-22) CHARGE
EVAPORATOR
CONDENSER
FAN, INDOOR
FAN, OUTDOOR
FAN SPEEDS, FAN/COOLING
FAN MOTOR
OPERATION CONTROL
ROOM TEMP. CONTROL
AIR DIRECTION CONTROL
CONSTRUCTION
PROTECTOR
COMPRESSOR
FAN MOTOR
POWER CORD
DRAIN SYSTEM
NET WEIGHT (lbs/kg)
OUTSIDE DIMENSION (inch)
(WxHxD) (mm)
115V, 60Hz
6,000 7,000
560 700
5.2 6.5
10.7 10.0
26.7(DB)* 19.4(WB)**
35(DB)* 23.9(WB)**
435g(15.3 oz) 350g(12.3 oz)
2ROW9STACKS,SLITFINTYPE
2 ROW 14 STACKS, LOUVER FIN TYPE
CROSS FLOW FAN
AXIAL FAN
3/3
4POLES
REMOTE CONTROLLER
THERMISTOR
VERTICAL LOUVER (RIGHT & LEFT)
HORIZONTAL LOUVER (UP & DOWN)
TOP-DOWN CHASSIS
OVERLOAD PROTECTOR
INTERNAL THERMAL PROTECTOR
3 WIRE WITH GROUNDING
ATTACHMENT PLUG (CORD-CONNECTED TYPE)
DRAIN PIPE SPLASHED BY FAN SLINGER
55/25 57/26
235/8 x12x181/32
600x305x458
LP6000ER LP7000R
MODELS
ITEMS
OPERATING
CONDITION
1.3 SPECIFICATIONS
1.3.1 FOR LP6000ER/LP7000R
* DB:Dry Bulb
**
WB:Wet Bulb
—4—
1.4 FEATURES
• Designed for COOLING ONLY.
• Powerful and quiet cooling.
• Simple installation and service.
• Low air-intake, top cool-air discharge.
1.5 CONTROL LOCATIONS
• Built-in adjustable THERMISTOR
• Washable one-touch filter
• Compact size
• Reliable and efficient rotary compressor.
Timer
Air
Purifier
AIR
PURIFIER
Power
Temp
Timer Mode
Auto
Swing
Fan Speed
1
5
2
4
3
52 4
31 6
Precaution: The Remote Control unit will not function properly if bright light strikes the sensor window of the air
conditioner or if there are obstacles between the Remote Control unit and the air conditioner.
POWER
• To turn the air conditioner ON, push this button. To
turn the air conditioner OFF, push the button again.
• This button takes priority over any other button.
• When you first turn it on, the unit is in cool mode,
high fan speed, temperature setting at 72˚F.
TEMPERATURE SETTING
• Use this button to automatically control the
temperature of the room.
The temperature can be set within a range of 60°F
to 86°F by increments of 1°F.
MODE
- Every time you push this button, it will cycle through
COOL, ENERGY SAVER, FAN and DRY.
- ENERGY SAVER
• The fan stops when the compressor stops cooling.
Approximately every 3 minutes the fan will turn on
and the unit will check the room air to determine if
cooling is needed.
FAN SPEED
• Every time you push this button, it advances the
setting as follows: {High(F3) → Low(F1) → Med(F2)
→ High(F3)}
TIMER
- SHUT-OFF TIME
• You will usually use shut-off time while you sleep.
• With unit running, use Timer to set number of hours
until shut-off.
• For your sleeping comfort, once Time is set, the
Temperature setting will raise 2°F after 30 min, and
2°F after another 30 min.
• Every time you push Timer button, it advances the
Timer setting as follows: 1 Hour → 2 Hours → etc. →
12 Hours maximum.
- START TIME
• While unit not running, use timer to set number of
hours before unit starts.
• Every time you push Timer button, it advances the
Timer setting as follows: 1 Hour → 2 Hours → etc. →
12 Hours maximum.
REMOTE CONTROL SENSOR
6
5
4
3
2
1
AUTO RESTART
When power is restored after an electrical power failure, the unit will begin to run at its last setting.
2. DISASSEMBLY INSTRUCTIONS
2.1 MECHANICAL PARTS
2.1.1 FRONT GRILLE
1. Unplug the unit from source of power.
2. Remove the 2 screws securing the front
Grille.(See Figure 1)
3. Push the grille up from the bottom and pull the
top of the grille way from the cabinet to lift the
top tabs out of their slots.(See Figure 2)
4. Disconnect display connector.
2.1.2 TOP COVER
1. Disconnect the unit from the power source.
2. Remove the front grille.(Refer to section 2.1.1)
3. Remove curtains on both side.
4. Remove 5 screws that secure the top cover to
the cabinet.(See Figure 3)
2.1.3 CABINET
1. Disconnect the unit from the power source.
2. Remove the front grille. (Refer to section 2.1.1)
3. Remove the top cover. (Refer to section 2.1.2)
4. Remove 4 screws that secure the cabinet to the
base pan. (See Figure 4)
5. Remove the cabinet.
6. Re-install by referring to the procedures above.
2.1.4 CONTROL BOX
1. Disconnect the unit from the power source.
2. Remove the front grille. (Refer to Section 2.1.1)
3. Remove the screw that fastens the power cord.
4. Remove the grounding screw from the
evaporator channel and remove the thermistor
from the evaporator fin.
5. Remove the 2 screws that fasten the control
box cover and open the control box cover.(See
Figure 5)
6. Remove the housing that connects motor and
wires come form compressor.
7. Remove the screw that secures the control box
and base pan.
8. Remove the 2 screws that secure the control
box and motor mount.(See Figure 6)
9. Move the control box upward.
—5—
Figure 1
Figure 2
Figure 4
Figure 6
Figure 3
Figure 5
—6—
2.2 AIR HANDLING PARTS
2.2.1 AIR GUIDE UPPER AND CROSS
FLOW FAN
1. Disconnect the unit from the power source.
2. Remove the front grille.
(Refer to Section 2.1.1)
3. Remove the top cover. (Refer to Section 2.1.2)
4. Remove the cabinet. (Refer to Section 2.1.3)
5. Remove the control box. (Refer to Section
2.1.4)
6. Move the evaporator forward, pulling it upward
slightly.
7. Pull the air guide upper and remove it.(See
Figure 7)
8. Loosen the bolt securing the cross flow fan to
the motor (do not remove).
9. Pull the cross flow fan and remove it.
10. Re-install by referring to the procedures
above.
2.2.2 FAN AND SHROUD
1. Disconnect the unit from the power source.
2. Remove the front grille. (Refer to Section 2.1.1)
3. Remove the top cover. (Refer to Section 2.1.2)
4. Remove the cabinet. (Refer to Section 2.1.3)
5. Remove 3 screws which the fasten the brace
and the bracket. (See Figure 8)
6. Remove the brace and the bracket.
7. Remove 4 screws which fasten the condenser
channel, shroud and base pan.
8. Move the shroud upward and remove it.
9. Move the condenser forward, pulling it slightly
upward .
10. Remove the clamp with a hand plier which
secures the fan.(See Figure 9)
11. Remove the fan.
14. Re-install by referring to the procedures
above.
Figure 7
Figure 8
Figure 9
—7—
2.2.3 INDOOR FAN MOTOR
1. Disconnect the unit from the power source.
2. Remove the front grille. (Refer to Section 2.1.1)
3. Remove the control box.
(Refer to Section 2.1.4)
4. Remove the air guide upper and cross flow fan.
(Refer to Section 2.2.1)
5. Remove the motor.(See Figure 10)
6. Re-install by referring to the procedures above.
2.2.4 AIR GUIDE LOWER
1. Disconnect the unit from the power source.
2. Remove the front grille. (Refer to Section 2.1.1)
3. Remove the top cover. (Refer to Section 2.1.2)
4. Remove the control box.
(Refer to Section 2.1.4)
5. Remove the air guide upper and cross flow fan.
(Refer to Section 2.2.1)
6.
Remove the motor. (Refer to
Section
2.2.3)
7.
Remove 2 screws which fasten the mount motor
and remove mount motor. (
See Figure 11
)
8. Remove the fan and shroud.(Refer to Section
2.2.2)
9. Remove 3 screws that secure the air guide to
the base pan. (See Figure 11)
10. Pull the airguide toward youself. (See Figure
12)
11. Re-install by referring to the procedures above.
2.3 ELECTRICAL PARTS
2.3.1 OVERLOAD PROTECTOR
1. Remove the front grille, top cover and cabinet.
(Refer to Section 2.1)
2. Remove the nut which fastens the terminal
cover.
3. Remove the terminal cover.
4. Remove all the leads from the overload
protector.
5. Remove the overload protector.
6. Re-install the components by referring to the
removal procedure above.
(See Figure 13 and 14)
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
—8—
2.3.2 COMPRESSOR
1. Remove the front grille, top cover and cabinet.
(Refer to Section 2.1)
2. Discharge the refrigerant system using a
FreonTMRecovery System.
If there is no valve to attach the recovery
system, install one (such as a Watco A-1)
before venting the FreonTM. Leave the valve in
place after servicing the system.
3. Remove the overload protector. (Refer to
section 2.3.1)
4. After purging the unit completely, unbraze the
suction and discharge tubes at the compressor
connections.
5. Remove the 3 nuts and the 3 washers that
fasten the compressor.(See Figure 15)
6. Remove the compressor.
7. Re-install the components by referring to the
removal procedure, above.
2.3.3 CAPACITOR
1. Remove the front grille. (Refer to Section 2.1.1)
2. Open the capacitor cover. (See Figure 16)
3. Remove all the leads of capacitor terminals.
4. Re-install the components by referring to the
removal procedure above.
2.3.4 POWER CORD
1. Remove the control box.(Refer to section 2.1.4)
2. Open the control box cover.
3. Disconnect two leads from the capactitor and
relay.
4. Remove a screw securing the clip with cord to
the control box.
5. Pull out the power cord.
6. Re-install by referring to procedures above.(Use
only one ground-marked hole for ground
connection.)
7. If the supply cord of this appliance is damaged,
it must be replaced by the special cord.
(The special cord means the cord that has the
same specification marked on the supply cord
attached at the unit.)
Figure 15
Figure 16
Figure 17
2.3.5 OUTDOOR MOTOR
1. Remove the front grille. (Refer to section 2.1.1)
2. Remote the top cover. (Refer to section 2.1.2)
3. Remove the cabinet. (Refer to section 2.1.3)
4. Remove the fan and shroud. (Refer to section
2.2.2)
5. Remove the 3 screws which fasten the motor from
the mount motor. (See Figure 18)
6. Open the capacitor cover(Refer to section 2.3.3)
7. Disconnect the outdoor motor housing.
8. Remove the motor.
9. Re-install the components by referring to the
removal procedure, above.
2.4 REFRIGERANT CYCLE
2.4.1 CONDENSER
1. Remove the front grille.(Refer to Section 2.1.1)
2. Remove the top cover. (Refer to Section 2.1.2)
3. Remove the cabinet. (Refer to Section 2.1.3)
4. Remove the shroud. (Refer to Section 2.2.2)
5. Discharge the refrigerant by using a refrigerant
recovery system.
6. After discharging the refrigerant completely,
unbraze the interconnecting tube at the
condenser connections.
7. Remove the condenser.
8. Re-install by referring to the procedures above.
2.4.2 EVAPORATOR
1. Remove the front grille.(Refer to Section 2.1.1)
2. Remove the top cover.(Refer to Section 2.1.2)
3. Remove the cabinet.(Refer to Section 2.1.3)
4. Remove the control box.(Refer to Section 2.1.4)
5. Discharge the refrigerant by using a refrigerant
recovery system.
6. After discharging the refrigerant completely,
unbraze the interconnecting tube at the condenser
connections.
7. Remove the evaporator.
8. Re-install by referring to the procedures above.
—9—
Figure 18
Figure 19
Discharge the refrigerant system using a
FreonTMRecovery System.
If there is no valve to attach the recovery
system, install one (such as a WATCO A-1)
before venting the FreonTM. Leave the valve in
place after servicing the system.
CAUTION
2.4.3 CAPILLARY TUBE
1. Remove the front grille.(Refer to Section 2.1.1)
2. Remove the top cover.(Refer to Section 2.1.2)
3. Remove the cabinet.(Refer to Section 2.1.3)
4. Remove the control box.(Refer to Section 2.1.4)
5. Discharge the refrigerant by using a refrigerant
recovery system.
6. After discharging the refrigerant completely,
unbraze the interconnecting tube of the capillary
tube.
7. Remove the capillary tube.
8. Re-install by referring to the procedures above.
—10—
— Replacement of the refrigerant.
1. When replacing the refrigerant, be sure to
discharge the refrigerant system using a Freon
TM
recovery System.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
the FreonTM. Leave the valve in place after
servicing the system.
2. After discharging the unit completely, remove the
desired component, and unbraze the pinch-off
tubes.
3. Braze service valves into the pinch-off tube ports,
leaving the valves open.
4. Braze the pinch-off tubes with Service valves.
5. Evacuate as follows.
1) Connect the vacuum pump, as illustrated figure
20A.
2) Start the vacuum pump, slowly open manifold
valves A and B with two full turns
counterclockwise and leave the valves open.
The vacuum pump is now pulling through valves
A and B up to valve C by means of the manifold
and entire system.
3) Operate the vacuum pump for 20 to 30 minutes,
until 600 microns of vacuum is obtained. Close
valves A and B, and observe vacuum gauge for
a few minutes. A rise in pressure would
indicate a possible leak or moisture remaining in
the system. With valves A and B closed, stop
the vacuum pump.
4) Remove the hose from the vacuum pump and
place it on the charging cylinder. See figure
20B.
Open valve C.
Discharge the line at the manifold connection.
5) The system is now ready for final charging.
6. Recharge as follows :
1) Refrigeration cycle systems are charged from
the High-side. If the total charge cannot be put
in the High-side, the balance will be put in the
suction line through the access valve which you
installed as the system was opened.
2) Connect the charging cylinder as shown in figure
20B.
With valve C open, discharge the hose at the
manifold connection.
3) Open valve A and allow the proper charge to
enter the system. Valve B is still closed.
4) If more charge is required, the high-side will not
take it. Close valve A.
5) With the unit running, open valve B and add the
balance of the charge.
a. Do not add the liquid refrigerant to the Low-
side.
b. Watch the Low-side gauge; allow pressure to
rise to 30 lbs.
c. Turn off valve B and allow pressure to drop.
d. Repeat steps b. and c. until the balance of the
charge is in the system.
6) When satisfied the unit is operating correctly,
use the pinch-off tool with the unit still running
and clamp on to the pinch-off tube. Using a tube
cutter, cut the pinch-off tube about 2 inches from
the pinch-off tool. Use sil-fos solder and solder
pinch-off tube closed. Turn off the unit, allow it to
set for a while, and then test the leakage of the
pinch-off connection.
NOTES
If high vacuum equipment is used, just crack
valves A and B for a few minutes, then open
slowly with the two full turns counterclockwise.
This will keep oil from foaming and being
drawn into the vacuum pump.
CAUTION
—11—
Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pin-off tool capable
of making a vapor-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service valve.
A
COMPOUND GAUGE
EVAPORATOR
(LOW PRESSURE SIDE)
COMPRESSOR
CAPILLARY TUBE
CONDENSER
(HIGH PRESSURE SIDE)
SEE INSETS
BELOW
MANIFOLD
GAUGE
B
A
B
EXTERNAL
VACUUM PUMP
A
CHARGING
CYLINDER
LOW
HI
B
C
Figure 20A-Pulling Vacuum
Figure 20B-Charging
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