LG LP090CED User manual

LG Packaged Terminal
Air Conditioner/Heat Pump
SERVICE MANUAL
LG
CAUTION
http://www.lgservice.com
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• FOR AUTHORIZED SERVICE ONLY.

—2—
1. PREFACE
1.1 SPECIFICATIONS ..........................................3
1.2 FEATURES AND BENEFITS..........................5
1.3 CONTROL LOCATIONS.................................7
1.4 ADDITIONAL CONTROLS..............................9
2.
DISASSEMBLY INSTRUCTIONS
2.1 MECHANICAL PARTS..................................11
2.1.1 FRONT GRILLE ...................................11
2.1.2 CONTROL BOX ...................................12
2.2 AIR HANDLING PARTS................................13
2.2.1 ELECTRIC HEATER
(Electric heater model only) .................12
2.2.2 CROSS FLOW FAN.............................14
2.2.3 AXIAL FAN...........................................14
2.2.4 SHROUD..............................................14
2.3 ELECTRICAL PARTS ...................................15
2.3.1 OUTDOOR MOTOR ............................15
2.3.2 INDOOR MOTOR ................................15
2.3.3 COMPRESSOR ...................................15
2.3.4 CAPACITOR ........................................15
2.3.5 POWER CORD ....................................15
2.3.6 P.C.B....................................................16
2.4 REFRIGERATION CYCLE............................16
2.4.1 CONDENSER ......................................17
2.4.2 EVAPORATOR ....................................17
2.4.3 CAPILLARY TUBE...............................17
3. INSTALLATION
3.1 HOW TO INSTALL THE UNIT ......................18
3.2 SUGGESTED TOOL REQUIREMENTS.......20
3.2.1 PREPARATION OF SLEEVE ..............21
3.2.2 PREPARATION OF THE FRONT
GRILLE ................................................21
3.2.3 UNIT INSTALLATION ..........................22
3.3 ELECTRICAL REQUIREMENTS ..................23
3.3.1 ELECTRICAL DATA (FOR 230V/208 MODEL)........ 23
3.3.2 ELECTRICAL SAFETY ............................ 23
4.
FIELD INSTALLED ACCESSORIES
...
24
5. FERFORMANCE DATA ................................. 40
6. TROUBLESHOOTING GUIDE
6.1 OUTSIDE DIMENSIONS...............................45
6.2 PIPING SYSTEM ..........................................45
6.3 TROUBLESHOOTING GUIDE......................46
7. SCHEMATIC DIAGRAM .....................51
8. EXPLODED VIEW..................................53
9. REPLACEMENT PARTS LIST .......54
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.
CONTENTS

—3—
LP 12 0 C E M 1
12 34 5 6 7 8 9
Digits 1,2 - LG Packaged Terminal Air Conditioner Digit 6 - Product Type
Digits 3,4 - Unit Cooling Capacity C = Air Conditoner
07 = 7,000 Btu/h H = Heat Pump
09 = 9,000 Btu/h Digit 7- Electric Heat
12 = 12,000 Btu/h E = Electric Heater
15 = 15,000 Btu/h Digit 8 - D = Digital
M = Mechanical
Digit 9 - Electric Voltage
1 = 265V, 60Hz
None = 230V, 60Hz
1.1 SPECIFICATIONS
MODELS
ITEMS
POWER SUPPLY
COOLING CAPACITY (Bru/h)
INPUT (W)
RUNNING CURRENT (A)
E.E.R. (Btu/h.W)
HEATING CAPACITY (Bru/h)
INPUT (W)
RUNNING CURRENT (A)
COP(W/W)
OPERATING COOLING INDOOR (°C)
TEMPERATURE OUTDOOR (°C)
HEATING INDOOR (°C)
OUTDOOR (°C)
REFRIGEANT(R-22) CHARGE(g)
EVAPORATOR
CONDENSER
FAN, INDOOR
FAN, OUTDOOR
FAN SPEEDS (FAN/COOLING/HEATING)
FAN MOTOR
OPERATION CONTROL
ROOM TEMP. CONTROL
CONSTRUCTION
ELECTRIC HEATER
PROTECTOR COMPRESSOR
FAN MOTOR
ELECTRIC HEATER
POWER CORD
DRAIN SYSTEM
NETWEIGHT(lbs/Kg)
DIMENSION (W*H*D) (inch)
(mm)
LP090CED LP120CED LP150CED LP070HED
1Ø, 230/208V, 60Hz 1Ø, 230/208V, 60Hz 1Ø, 230/208V, 60Hz 1Ø, 230/208V, 60Hz
9,000/8,800 11,800/11,500 14,300/14,100 7,600/7,300
770/750 1,055/1,025 1,430/1,410 600/575
3.5/3.8 4.8/5.2 6.5/7.1 2.7/2.9
11.7/11.7 11.2/11.2 10.0/10.0 12.7/12.7
- - - 6,400/6,200
---535/520
- - - 2.4/2.6
- - - 3.5/3.5
26.7 (DB) 19.4(WB) 26.7 (DB) 19.4(WB) 26.7 (DB) 19.4(WB) 26.7 (DB) 19.4(WB)
35 (DB) 23.9(WB) 35 (DB) 23.9(WB) 35 (DB) 23.9(WB) 35 (DB) 23.9(WB)
21.1 (DB) 15.6(WB) 21.1 (DB) 15.6(WB) 21.1 (DB) 15.6(WB) 21.1 (DB) 15.6(WB)
8.3 (DB) 6.1(WB) 8.3 (DB) 6.1(WB) 8.3 (DB) 6.1(WB) 8.3 (DB) 6.1(WB)
790(27.9 OZ) 630(22.2 OZ) 735(25.9 OZ) 610(21.5 OZ)
2 ROE 10 STACKS 2 ROE 10 STACKS 2 ROE 10 STACKS 2 ROE 12 STACKS
2 ROE 14 STACKS 2 ROE 17 STACKS 2 ROE 17 STACKS 2 ROE 17 STACKS
Cross Flow Fan Cross Flow Fan Cross Flow Fan Cross Flow Fan
Axial Fan Axial Fan Axial Fan Axial Fan
2/2/2 2/2/2 2/2/2 2/2/2
4POLES 4POLES 4POLES 4POLES
MANUAL TYPE MANUAL TYPE MANUAL TYPE MANUAL TYPE
THERMISTOR THERMISTOR THERMISTOR THERMISTOR
SLID IN-OUT SLID IN-OUT SLID IN-OUT SLID IN-OUT
3.5KW, 230V 3.5KW, 230V 3.5KW, 230V 2.5KW, 230V
EXTERNAL OVERLOAD PROTECTOR EXTERNAL OVERLOAD PROTECTOR EXTERNAL OVERLOAD PROTECTOR EXTERNAL OVERLOAD PROTECTOR
INTERNAL THERMAL PROTECTOR INTERNAL THERMAL PROTECTOR INTERNAL THERMAL PROTECTOR INTERNAL THERMAL PROTECTOR
FUSE LINK, BIMETAL THERMOSTAT FUSE LINK, BIMETAL THERMOSTAT FUSE LINK, BIMETAL THERMOSTAT FUSE LINK, BIMETAL THERMOSTAT
1.6m(3 WIRE WITH GROUDING) 1.6m(3 WIRE WITH GROUDING) 1.6m(3 WIRE WITH GROUDING) 1.6m(3 WIRE WITH GROUDING)
SPLASHED BY FAN SLINGER SPLASHED BY FAN SLINGER SPLASHED BY FAN SLINGER SPLASHED BY FAN SLINGER
92/42.8 96/43.7 101/45.7 90/40.7
41 31/32*15 31/32*19 27/32 41 31/32*15 31/32*19 27/32 41 31/32*15 31/32*19 27/32 41 31/32*15 31/32*19 27/32
1066*406*505 1066*406*505 1066*406*505 1066*406*505

—4—
MODELS
ITEMS
POWER SUPPLY
COOLING CAPACITY (Bru/h)
INPUT (W)
RUNNING CURRENT (A)
E.E.R. (Btu/h.W)
HEATING CAPACITY (Bru/h)
INPUT (W)
RUNNING CURRENT (A)
COP(W/W)
OPERATING COOLING INDOOR (°C)
TEMPERATURE OUTDOOR (°C)
HEATING INDOOR (°C)
OUTDOOR (°C)
REFRIGEANT(R-22) CHARGE(g)
EVAPORATOR
CONDENSER
FAN, INDOOR
FAN, OUTDOOR
FAN SPEEDS (FAN/COOLING/HEATING)
FAN MOTOR
OPERATION CONTROL
ROOM TEMP. CONTROL
CONSTRUCTION
ELECTRIC HEATER
PROTECTOR COMPRESSOR
FAN MOTOR
ELECTRIC HEATER
POWER CORD
DRAIN SYSTEM
NETWEIGHT(lbs/Kg)
DIMENSION (W*H*D) (inch)
(mm)
LP090HED LP120HED LP150HED
1Ø, 230/208V, 60Hz 1Ø, 230/208V, 60Hz 1Ø, 230/208V, 60Hz
9,100/8,900 12,100/11,800 14,300/14,100
775/760 1,090/1,065 1,460/1,440
3.7/3.9 5.0/5.4 6.5/7.3
11.7/11.7 11.1/11.1 9.8/9.8
8,200/8,000 10,900/10,700 13,500/13,300
705/690 970/950 1,275/1,255
3.2/3.5 4.4/4.8 5.8/6.3
3.4/3.4 3.3/3.3 3.1/3.1
26.7 (DB) 19.4(WB) 26.7 (DB) 19.4(WB) 26.7 (DB) 19.4(WB)
35 (DB) 23.9(WB) 35 (DB) 23.9(WB) 35 (DB) 23.9(WB)
21.1 (DB) 15.6(WB) 21.1 (DB) 15.6(WB) 21.1 (DB) 15.6(WB)
8.3 (DB) 6.1(WB) 8.3 (DB) 6.1(WB) 8.3 (DB) 6.1(WB)
860(30.3 OZ) 815(28.7 OZ) 1,050(37.0 OZ)
2 ROE 10 STACKS 2 ROE 10 STACKS 2 ROE 10 STACKS
2 ROE 14 STACKS 3 ROE 17 STACKS 2 ROE 14 STACKS
Cross Flow Fan Cross Flow Fan Cross Flow Fan
Axial Fan Axial Fan Axial Fan
2/2/2 2/2/2 2/2/2
4 POLES 4 POLES 4 POLES
MANUAL TYPE MANUAL TYPE MANUAL TYPE
THERMISTOR THERMISTOR THERMISTOR
SLID IN-OUT SLID IN-OUT SLID IN-OUT
3.5KW, 230V 3.5KW, 230V 3.5KW, 230V
EXTERNAL OVERLOAD PROTECTOR EXTERNAL OVERLOAD PROTECTOR EXTERNAL OVERLOAD PROTECTOR
INTERNAL THERMAL PROTECTOR INTERNAL THERMAL PROTECTOR INTERNAL THERMAL PROTECTOR
FUSE LINK, BIMETAL THERMOSTAT FUSE LINK, BIMETAL THERMOSTAT FUSE LINK, BIMETAL THERMOSTAT
1.6m(3 WIRE WITH GROUDING) 1.6m(3 WIRE WITH GROUDING) 1.6m(3 WIRE WITH GROUDING)
SPLASHED BY FAN SLINGER SPLASHED BY FAN SLINGER SPLASHED BY FAN SLINGER
94/42.7 99/44.7 103/46.7
41 31/32*15 31/32*19 27/32 41 31/32*15 31/32*19 27/32 41 31/32*15 31/32*19 27/32
1066*406*505 1066*406*505 1066*406*505

1.2 FEATURES AND BENEFITS
The PTAC has many features, some of which are different than those found on conventional PTAC units. The servicer must be
familiar with these features in order to properly service the unit.
• IIR (Infinite Impulse Response)
The IIR function senses the temperature several times per second and makes micro-adjustments several times per
• Compressor Restart Delay
This feature extends the overall life of compressor by preventing the short-cycling of the air-conditioner. When the compressor
restarts, LG PTAC is designed to give a minimum of three minutes to have a time of equalizing the refrigerant pressures for
optimizing cycling.
• Fan-Only Setting - High/Low
The fan can run at HIGH or LOW speed without COOLING or HEATING to provide air circulation and ventilation.
• Indoor Fan Speed Selections - High/Low
The fan can run at HIGH or LOW speed for either COOLING or HEATING.
• Two Fan motors
The unit has two fan motors to provide quiet operation and maximum efficiency.
• LED Diagnostics
All units have this feature indicating the problem when the unit is not operating properly with easy-to-read diagnostics. For
example, 1 blink every 2 seconds indicates compressor failure.
—5—
INDOOR
REAR GRILLE
(Aluminum Rear Grille)
EXPANDED METAL GRILLE
(Superior for a performance)
SLEEVE ASSEMBLY
(Including Aluminum Rear Grille)
THE SLEEVE AND THE REAR GRILLE
(Available as an option)
VERTICAL AIR DEFLECTOR
(Horizontal Louver)
AIR FILTER
INLET GRILLE
(Air Intake)

•Indoor Filters
The unit uses two indoor filters which slide in and cut easily. The filters may be cleaned by washing and brushing without
removing the front grille.
•Rotary Compressor
The unit uses a rotary compressor for quiet, reliable operation and long life.
•2 Position Discharge Grille
The discharge grille can provide air flows upward at an angle of 40 off vertical or 15 degree off vertical. The angle is changed
by removing the front grille and 4 screws that fasten the discharge grille to the front grille and rotating the louvers to an
alternate position.
•Indoor Room Freeze Protection
When the unit senses the room temperature falls to less than 40°F the unit activates the fan motor and either the electric
resistance heater or the hydronic heater to prevent pipes or fixtures from freezing. This also overrides front desk control of the
unit mounted or wall mounted controls.
•Door Switch/Occupancy Sensor
The unit is capable of accommodating a field installed door switch and occupancy sensor to operate the energy management
feature. For additional information, refer to the unit operation section.
•Compressor Overload Protection
This feature prevents the damage of the compressor by sensing the indoor tube temperature in heating. If the indoor
temperature is over 130˚F, the outdoor fan will be switched off and back on when the temperature drops below 120˚F.
•Outdoor Air Temperature Switchover
This will effectively change the unit from heat pump mode to total electric resistance heat.
•Temperature limits
The unit is programmed to provide both heating and cooling temperature limits by dip switches on control panel from 50˚Fto
90˚F. Temperature limits help to prevent overheating and overcooling and reduce energy costs.
•Condensate Drain Valve
The unit has a condensate drain valve to prevent water from collecting or freezing in the basepan.
•Quick Heater Recovery
The unit is designed to operate the electric heater to warm the room to the temperature set point as soon as heat pump cycle
is on in heating. This feature has an advantage of reducing the time to reach the set point and improving the temperature
increase for better comfort.
•Reverse Cycle Defrosting - (PTHDs only)
The unit will activate the reverse cycle defrost when the outdoor coil temperature has remained at a cold temperature to form
the ice on the coil.This ice will reduce airflow though the coil and will also reduce the efficiency of unit. The LG PTHP will
employ an active reverse cycle defrost function to melt the ice off the outdoor coil for insuring room comfort conditions and
savings from extended operation.
•High Temperature Heat Pump Operation Protection
The compressor will be switched off to prevent damage when the heat pump is operated in high outdoor temperatures.
•Remote Thermostat Control
Each unit is built to be operated from any standard 4 or 5 wire remote-mounted thermostat, if desired. The unit has a built-in
low voltage power source which can accommodate a large variety of thermostat choices-manual, auto changeover, or
programmable. A remote thermostat can also be added to any installed unit.
•Zone Sensor
Occupants enjoy ultimate comfort with consistent climate control. Attach an optional, inexpensive remote Zone Sensor to
exactly match the functions of the PTAC without disabling any features.
—6—

—7—
1.3 CONTROL LOCATIONS
•OPERATION
ELECTRIC HEATING MODEL COOLING ONLY MODEL
VENT
OPEN
VENT
CLOSE
TEMPERATURE CONTROL
Set the Thermostat control to the desired temperature
mark 5 (the mid-point is a good starting position). If the
room temperature is not satisfactory after a reasonable
time, adjust the control to a cooler or warmer setting, as
appropriate.
OPERATION MODE SELECTOR
OFF Turns air conditioner off.
LOW FAN Low speed fan operation without cooling.
HIGH FAN High speed fan operation without cooling.
LOW COOL Cooling with the low speed fan operation.
HIGH COOL Cooling with the high speed fan operation.
LOW HEAT Heating with the low speed fan operation.
HIGH HEAT Heating with the high speed fan operation.
•VENTILATION
The ventilation lever is located to the lower left side of the unit.
The ventilation lever must be in the CLOSE position in order
to maintain the best cooling conditions.
When fresh air is necessary in the room, set the ventilation
lever to the OPEN position.
The damper is opened and outdoor air is drawn into the room.
This will reduce the cooling or heating efficiency.
When the air conditioner has performed a cooling or
heating operation and is turned off or set to the fan
position, wait at least 3 minutes before resetting to the
cooling operation.
A slight heat odor may come from the unit when first
switching to HEAT after the cooling season is over.
This odor, caused by fine dust particles on the heater, will
disappear quickly. This is harmless.
CAUTION
NOTE

—8—
•ELECTRONIC CONTROLS
The controls will look like one of the following.
TEMP
MODE
HEAT
E/SAVE
FANFAN
COOLCOOL
HIGHHIGH
LOWLOW TIMERTIMER
FAN TIMER
'
F
ON
OFF
ON
OFF
POWER
MODE
- Push this button to cycle through the modes from COOL → FAN
→ HEAT→ COOL.
- COOL
•Fan runs continually for normal cooling operation.
- 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 temperature to determine if cooling is
needed.
- FAN
•Fan operation without heating or cooling.
- HEAT
•Fan runs continually for normal heating operation.
TIMER
- SHUT-OFF TIME
•You will usually use shut-off time while you sleep.
•If unit is 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 minutes, and once again
after another 30 minutes.
•Push Timer to cycle through the settings from 1 Hour →2 Hours → ... → 12 Hours maximum.
TEMPERATURE SETTING
•Use this button to automatically control the
temperature of the room.
The temperature can be set within a range of
54°F to 86°F by increments of 2°F.
•The setting appears in the display.
FAN SPEED
•Every time you push this button, it cycles through the settings as follows:
{High(F2) →Low(F1) →High(F2) →Low(F1)}
•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.

1.4 ADDITIONAL CONTROLS
•REMOVING THE FRONT GRILLE
Additional controls are available after removing the front
grille and option cover of control box.
To remove the front grille, pull out the bottom of front
grille and then lift up.
To replace the front grille, place the tabs over the top of
the unit and push the bottom of front grille until the clips
snap into place.
•ADDITIONAL CONTROLS
The additional controls are located behind the option cover of control box. The standard settings will be in the OFF position.
The authorized service man has to check switches and ensure the switches are in the desired position.
•TEMPERATURE LIMITING
Temperature Limiting can save money by limiting the lowest temperature for cooling and the highest temperature for heating.
The temperature limiting is controlled by dip switches #1 - #3.
This temperature limiting is not available with the Remote Wall Thermostat.
—9—
LOCAL
1OFF
2OFF 3OFF 4OFF 5
LOCAL
1OFF
2OFF 3OFF 4OFF 5
ON
ONREMOTE
OFF
ON ON ON
Remote/Local
Energy Saver
Temperature Limit 1
Temperature Limit 2
Temperature Limit 3
LOCALLOCAL
1OFF
OFF
2OFF
OFF
3OFF
OFF
4OFF
OFF
5
LOCAL
1OFF
2OFF 3OFF 4OFF 5
LOCALLOCAL
1OFF
OFF
2OFF
OFF
3OFF
OFF
4OFF
OFF
5
LOCAL
1OFF
2OFF 3OFF 4OFF 5
OFF OFF OFF 54°F (12.2°C) 86°F (30.0°C)
86°F (30.0°C)
86°F (30.0°C)
86°F (30.0°C)
86°F (30.0°C)
86°F (30.0°C)
86°F (30.0°C)
86°F (30.0°C)
54°F (12.2°C)
54°F (12.2°C)
54°F (12.2°C)
54°F (12.2°C)
54°F (12.2°C)
54°F (12.2°C)
54°F (12.2°C)
54°F (12.2°C)
86°F (30.0°C)
ON OFF OFF 56°F (13.3°C) 84°F (28.9°C)
OFF ON OFF 58°F (14.4°C) 82°F (27.8°C)
ON ON OFF 60°F (15.5°C) 80°F (26.7°C)
OFF OFF ON 62°F (16.6°C) 78°F (25.5°C)
ON OFF ON 64°F (17.7°C) 76°F (24.4°C)
OFF ON ON 66°F (18.9°C) 74°F (23.3°C)
ON ON ON 68°F (20.0°C) 72°F (22.2°C)
Temperature Temperature Temperature
Limit #1 Limit #2 Limit #3 Lowest Temp. Highest Temp. Lowest Temp. Highest Temp.
Cooling Operation Heating Operation
OFFOFF
ONOFF
Unit Type
ON
OFF
#7
ON
ON
#6
Cooling+Electric Heater+Heat Pump
Cooling+Electric Heater
Cooling Only
Heat Pump Only

•REMOTE/LOCAL CONTROL
When remote/local switch #1 is on, it allow the unit to operate by the control of Remote Wall Thermostat.
The unit control by knobs are not available.
•ENERGY SAVER
The energy saver switch #2 is on. This switch is set at cycle fan to provide continuous fan operation in cool or heat modes.
When the switch is off the continuous fan allows continuous circulation of room air and make the more balanced temperature
of the room. When the switch is on the fan is on or off with the compressor or with the heater.
•FRONT DESK CONTROL
When the pair wire is connected to the connector LO and LI, the unit can be turned ON or OFF with a switch located at the
Front Desk Control panel. When the front desk switch is ON, the fan operate according to the condition of setting without
working compressor and heater. When the front desk switch is OFF, the unit can operate according to the setting of controls.
Molex Housing Spec 396-06V
•REMOTE WALL THERMOSTAT
When the wires are connected, the unit will be controlled by a remote wall
thermostat.
The thermostat connections supply the 24 Volt AC. When you install the
digital/electronic thermostat, you must set it to the 24 Volt AC. See the
installation Instruction in this manual for the Remote Wall Thermostat.
Molex Housing Spec 396-07V
—10—
Wire # AWG Maximum Length
#22 600 ft (180 m)
#20 900 ft (270 m)
#18 1500 ft (450 m)
#16 2000 ft (610 m)
GL GH O W Y R CLO LI
Front Desk Switch
LO LI GL GH O W Y R C
Low Fan
High Fan
Reversing Valve
Heater
Compressor
24 Volt-L
24 Volt-N
Wiring Schematic for
Remote Heat Pump
Wiring Schematic for
Straight Cool Unit.
Note: The following figures show wiring
schematics for heat pump and straight cool
units with electric heat, respectively.

—11—
2.1 MECHANICAL PARTS
2.1.1 FRONT GRILLE
1. Remove the front grille. (See Figure 1)
2. To remove the front grille, pull out the bottom of
the front grille and then lift up.
Re-install the component by referring to the
removal procedure.
3. To replace the front grille, place the tabs over the
top of the unit and push the bottom of front grille
until the clips snap into place.
•This Room Air Conditioner (PTAC) discharges air
from the top of the unit through reversible, 2-position
discharge grille louvers. The unit is shipped from the
factory with the discharge grille louvers at an angle
of 40˚off vertical. In the alternate position, the
louvers will be at an angle of 15˚off vertical.
To adjust air direction, remove the front grille.
Remove the 4 screws that fasten the discharge grille
to the front grille.
Flip the discharge grille 180°, then reattach the
discharge grille to the front grille with 4 screws.
2. DISASSEMBLY INSTRUCTIONS
—Before the following disassembly, POWER SWITCH is set to OFF and disconnected the power cord.
Figure 1
40˚
15˚
Screws

—12—
2.1.2 CONTROL BOX
1. Remove the front grille. (Refer to section 2.1.1)
2. Remove the two screws which fasten the control
box. (See Figure 2)
3. Pull the control box from the Air guide.
4. Remove the control box cover. (See Figure 3)
5. Disconnect wire housings on the control box.
6. Pull the control box assembly out from the unit.
(See Figure 4)
7. Re-install the components by referring to the
removal procedure.
Figure 2
Figure 3
Figure 4

Figure 8
—13—
2.2 AIR HANDLING PARTS
2.2.1 ELECTRIC HEATER
(ELECTRIC HEATER MODEL ONLY)
1. Remove the front grille.(Refer to section 2.1.1)
2. Remove the control box assembly.
(Refer to section 2.1.2)
3. Remove the 4 screws which fasten the Evaporator.
(See Figure 5)
4. Remove the top cover assembly, net steel, brace.
(See Figure 6)
5. Remove the 6 screws which fasten the Air-guide.
6. Pull the Air-guide assembly out from the unit.
(See Figure 7)
7. Remove the 2 screws which fasten the electric
heater in the left hand side.
8. Pull the electric heater towards left for a while and
then lift up vertically to disassemble it completely
from Air guide.
Figure 5
Figure 6
Figure 7

—14—
Figure 12
2.2.2 CROSS FLOW FAN
1. Remove the front grille. (Refer to section 2.1.1)
2. Remove the control box assembly.
(Refer to section 2.1.2)
3. Remove the Air-Guide Assembly from the unit.
(Refer to section 2.2.1)
4. Loosen the screw on the cross flow fan.
(See Figure 9)
5. Remove the 4 screws which fasten the indoor
motor and the earth wire. (See Figure 10)
6. Remove the supports on both sides.
7. Pull the cross flow fan out from the air-guide.
8. Re-install the components by referring to the
removal procedure.
2.2.3 AXIAL FAN
1. Remove the brace.
2. Remove the 4 screws which fasten the condenser
with the shroud and the basepan. (See Figure 11)
3. Remove the condenser sideways carefully.
4. Remove the clamp which secures the fan with
pliers.(See Figure 12)
5. Remove the axial fan.
6. Re-install the components by referring to the
removal procedure.
Figure 9
Figure 10
Figure 11

—15—
2.2.4 SHROUD
1. Remove the axial fan. (Refer to section 2.2.3)
2. Remove the 4 screws which fasten the condenser
with the shroud and the basepan. (See Figure 11)
3. Remove the shroud.
4. Re-install the component by referring to the
removal procedure.
2.3. ELECTRICAL PARTS
2.3.1 OUTDOOR MOTOR
1. Remove the clamp cord and disconnect a wire
housing in control box. (Refer to section 2.1.2)
2. Remove the axial fan. (Refer to section 2.2.3)
3. Remove the 2 screws which fasten the motor.
(See Figure 12)
4. Remove the motor
5. Re-install the component by referring to the
removal procedure, above.
2.3.2 INDOOR MOTOR (Refer to section 2.2.2)
2.3.3 COMPRESSOR
1. Discharge the refrigerant system using a
refrigerant recovery system.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
the refrigerant. Leave the valve in place after
servicing the system.
2. Disconnect the 3 leads from the compressor.
3. After purging the unit completely, unbraze the
suction and discharge tubes at the compressor
connections.
4. Remove the 3 nuts and the 3 washers which
fasten the compressor. (See Figure 15)
5. Remove the compressor.
6. Re-instill the components by referring to the
removal procedure, above.
2.3.4 CAPACITOR
1. Remove the control box. (Refer to section 2.1.2)
2. Remove 1 screw and disconnect the leads which
connected to the box type capacitor.
(See Figure 16)
3. Remove 1 screw and the clamp which fastens the
can-type capacitor.
4. Disconnect all the leads of capacitor terminals.
5. Re-install the components by referring to the
removal procedure, above.
Figure 13
Figure 14
Figure 15
Figure 16

—16—
2.3.5 POWER CORD
1. Remove the control box. (Refer to section 2.1.2)
2. Disconnect the grounding screw from the control
box.
3. Disconnect 2 receptacles.
4. Remove a screw which fastens the clip cord.
5. Separate the power cord from the control box.
(See Figure 17)
6. Re-install the component by referring to the
removal procedure, 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 an exact replacement part.
(The special cord means the cord which has the
same specification marked on the supply cord
fitted to the unit.)
2.3.6 P.C.B.
1. Remove the escutcheon.
2. Remove the two knobs.
3. Remove the 2 screws which fasten P.C.B. cover.
4. Disconnect all the leads which connected to the
P.C.B.
5. Remove the two screws which fasten the P.C.B.
board.
6. Re-install the components by referring to the
removal procedure, above.
WARNING
Figure 17
Figure 18
After servicing control box ,make sure that AC and DC
wires are separated and tied up properly.
The wires should also be pressed a little downwards to
prevent touching it to the display pcb.

—17—
2.4 REFRIGERATION CYCLE
2.4.1 CONDENSER
1. Remove the brace and the shroud.
(Refer to section 2.2.2)
2. Remove the 4 screws which fasten the shroud.
(Refer to section 2.2.2)
3. Push forward the shroud and remove the 2 screws
which fasten the condenser with the basepan.
4. After discharging the refrigerant completely,
unbraze the interconnecting tube at the condenser
connections.
5. Remove the condenser.
6. Re-install the components by referring to notes.
(See Figure 19)
2.4.2 EVAPORATOR
1. Remove the front grille. (Refer to section 2.1.1)
2. Discharge the refrigerant completely.
3. Remove the control box assembly.
(Refer to section 2.1.2)
4. Remove the 4 screws which fasten the evaporator
at the left side and the right side.
5. Move the evaporator sideward carefully and then
unbraze the interconnecting tube at the evaporator
connectors.
6. Remove the evaporator.
7. Re-install the components by referring to notes.
(See Figure 20)
2.4.3 CAPILLARY TUBE
1. After discharging the refrigerant completely,
unbraze the interconnecting tube at the capillary
tube.
2. Remove the capillary tube.
3. Re-install the components by referring to notes.
Figure 19
Figure 15
Discharge the refrigerant system using a
refrigerant recovery system.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before
venting the refrigerant. Leave the valve in place
after servicing the system.
CAUTION
Figure 20

—18—
—Replacement of the refrigeration cycle.
1. When replacing the refrigeration cycle, be sure to
discharge the refrigerant system using a
refrigerant recovery system.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
the refrigerant. 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. Solder service valves into the pinch-off tube ports,
leaving the valves open.
4. Solder the pinch-off tubes with service valves.
5. Evacuate as follows.
1) Connect the vacuum pump, as illustrated
Figure 16 A.
2) Start the vacuum pump, slowly open manifold
valves A and B with two full turns
counterclockwise and leave the valves closed.
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 are obtained. Close
valves A and B, and observe the 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 16 B.
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
16B.
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

—19—
Equipment needed: Vacuum pump, charging cylinder, manifold gauge, brazing equipment. pinch-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
Figure 16 A-Pulling Vacuum Figure 16 B-Charging
A
B
EXTERNAL
VACUUM PUMP
A
CHARGING
CYLINDER
LOW HI
B
C

—20—
3. INSTALLATION
3.1 HOW TO INSTALL THE UNIT
For existing sleeve, you should measure the wall sleeve
dimensions.
Install the new air conditioner according to these installation
instructions to achieve the best performence. All wall sleeves
used to mount the new air conditioner must be in good
structural condition and have a rear grille that securely
attaches to the sleeve or the flange of the sleeve to secure the
new air conditioner.
•To avoid vibration and noise, make sure the unit is installed
securely and firmly.
When installing the sleeve, make certain there is nothing
within 20" of the back that would interfere with heat radiation
and exhaust air flow.
Insulation strip must be
attached to prevent the re-
circulation of exhaust air to
inward side from the either
side of condenser space. The
insulation strip is provided
with the box.
Refer to the diagram below.
1) Take out the insulation strip from the upper packing.
2) Attach the insulation strip onto the rear upper side of the
wall sleeve.
3) To improve unit energy efficiency, it is recommended the
change of outside grille for an unit protection and an
addition of a plastic rear grille. (This is optional.)
4) Insulation strip prevents the exhaust air from re-entering
from either side of condenser space which may decrease
the cooling efficiency of condenser.
Recommended
406 mm
(16")
406 mm
(16")
1,066 mm
(42")
1066 mm
(42")
318 mm
(12 1/2")
318 mm
(12 1/2")
505 mm
(20")
Over 20"
HEAT
RADIATION
WALL
WALL
INSULATION SLEEVE
INTAKE
AIR
COOLED
AIR
1/4" Bubble
of the level
Front Insulation Strip
Rear
Sleeve
280 mm
(11")
•There are sharp edges that can cause serious cuts.
•When lifting the air conditioner, it is HEAVY.
Use 2 people to lift.
CAUTION
Dimension of air conditioner
Dimension of sleeve assembly (optional)