LG LP070CED 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..............................7
1.3 CONTROL LOCATIONS.....................................9
1.4 ADDITIONAL CONTROLS................................11
2.
DISASSEMBLY INSTRUCTIONS
2.1 MECHANICAL PARTS......................................15
2.1.1 FRONT GRILLE.......................................15
2.1.2 CONTROL BOX.......................................16
2.2 AIR HANDLING PARTS....................................17
2.2.1 ELECTRIC HEATER
(Electric heater model only) .....................17
2.2.2 CROSS FLOW FAN.................................18
2.2.3 AXIAL FAN...............................................18
2.2.4 SHROUD..................................................19
2.3 ELECTRICAL PARTS .......................................19
2.3.1 OUTDOOR MOTOR ................................19
2.3.2 INDOOR MOTOR ....................................19
2.3.3 COMPRESSOR.......................................19
2.3.4 CAPACITOR............................................19
2.3.5 POWER CORD........................................20
2.3.6 P.C.B........................................................20
2.4 REFRIGERATION CYCLE................................21
2.4.1 CONDENSER..........................................21
2.4.2 EVAPORATOR........................................21
2.4.3 CAPILLARY TUBE...................................21
3. INSTALLATION
3.1 HOW TO INSTALL THE UNIT...........................24
3.2 WALLSLEEVE INSTALLATION........................25
3.2.1 WALL SLEEVE INSTALLATION DATA...25
3.2.2 PREPARATION OF FRONT GRILLE......26
3.2.3 UNIT INSTALLATION..............................27
3.3 ELECTRICAL REQUIREMENTS ......................30
3.3.1
ELECTRICAL DATA (FOR 230V/208 MODEL)............... 30
3.3.2 ELECTRICAL SAFETY ................................. 30
4. FIELD INSTALLED ACCESSORIES ......... 31
5. FERFORMANCE DATA ....................................... 47
6.
TROUBLESHOOTING GUIDE
6.1 OUTSIDE DIMENSIONS...................................52
6.2 PIPING SYSTEM...............................................52
6.3 TROUBLESHOOTING GUIDE..........................53
7. SCHEMATIC DIAGRAM..........................58
8. EXPLODED VIEW......................................61
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
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

—3—
Cooling Capacity kW
Btu/h
Heating Capacity kW
Btu/h
Power Input Cooling/Heating W
Running Current Cooling/Heating A
Starting Current Cooling/Heating A
EER W/W
Btu/h.W
COP W/W
Power Supply Ø / V / Hz
Power Factor %
Air Flow Rate Indoor,Max m3/min(cfm)
Outdoor,Max m3/min(cfm)
Moisture Removal l/h
Sound Level Indoor,H/M/L dB(A)+3
Outdoor,Max dB(A)+3
Refrigerant & Charge g(oz)
Type
Model
Compressor Motor Type
Oil Type
Oil Charge cc
O.L.P Name
Type(In/Out)
Fan Motor Type
Motor Output W
Power Supply Cable No.*mm2
Dimension W*H*D mm
inch
Net Weight Indoor kg(lbs)
Tool Code(Chassis)
Temperature Control
Energy Saver Switch
Prefilter(washable/anti-fungus)
Plasma Filter
Steps, Fan/Cool/Heat
Airflow Direction Control(up&down)
Airflow Direction Control(left&right)
Remocon Type
Setting Temperature Cooling
Functions Range Heating
Auto Operation (Micom Control)
Panel Touch Type
Timer
Air Discharge
Air Ventilation
Deice Control(Defrost)
Hot Start
Look
Cabinet Type(Chassis Type)
Special Function
Models
LP070CED LP090CED LP120CED LP150CED
2.17 2.23 2.58 2.64 3.37 3.46 4.13 4.19
7400 7600 8800 9000 11500 11800 14100 14300
---- ----
---- ----
590 610 750 770 1025 1055 1410 1430
3.0 2.8 3.8 3.5 5.2 4.8 7.1 6.5
-/- -/- -/- -/- -/- -/- -/- -/-
3.68 3.66 3.44 3.43 3.29 3.28 2.93 2.93
12.5 12.5 11.7 11.7 11.2 11.2 10.0 10.0
---- ----
1 / 208 / 60 1 / 230 / 60 1 / 208 / 60 1 / 230 / 60 1 / 208 / 60 1 / 230 / 60 1 / 208 / 60 1 / 230 / 60
94.6 94.7 94.9 95.7 94.8 95.6 95.5 95.7
9.5(335) 9.5(335) 11(390) 11(390)
-- --
0.9 1.2 1.5 2.0
45/-/43 45/-/43 49/-/47 49/-/47
60/58 60/58 63/61 63/61
R22, 650(22.75) R22, 790(27.9) R22, 630(22.2) R22, 735(25.9)
Rotary(Non Tropical) Rotary(Non Tropical) Rotary(Non Tropical) Rotary(Non Tropical)
2R10S236A6G 2R12S236A6J QK145KBJ QJ196KAC
PSC PSC PSC PSC
ATMOS M60 or SUNISO 4GDID ATMOS M60 or SUNISO 4GDID SUNISO 4GSI SUNISO 4GSI
260 290 280 410
Internal Internal Internal Internal
Cross Flow Fan / Axial Fan Cross Flow Fan / Axial Fan Cross Flow Fan / Axial Fan Cross Flow Fan / Axial Fan
4 POLES 4 POLES 4 POLES 4 POLES
50 50 50 50
3*2.1 3*2.1 3*2.1 3*2.1
1066*406*505 1066*406*505 1066*406*505 1066*406*505
42*16*19-7/8 42*16*19-7/8 42*16*19-7/8 42*16*19-7/8
44.0(97) 44.1(97) 46.8(103) 50.4(111)
YA YA YA YA
Thermistor Thermistor Thermistor Thermistor
OO OO
OO OO
-- --
2/2/2 2/2/2 2/2/2 2/2/2
Manual Manual Manual Manual
-- --
-- --
54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C)
54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C)
-- --
Micom Micom Micom Micom
12h, On/Off 12h, On/Off 12h, On/Off 12h, On/Off
Rear Rear Rear Rear
OO OO
OO OO
-- --
L-Look L-Look L-Look L-Look
-- --
Electric Heater Electric Heater Electric Heater Electric Heater
1.1.1 COOLING ELECTRICAL
Note:
O : Applied, - : No relation
*
For circuit breaker rating, please conform to local standards wherever necessary.
❈ Some of functions are slightly different depending upon models.
❈ The specification may be subject to change without notice for purpose of improvement.
gy g
❈ The specification may be subject to change without notice for purpose of improvement.

—4—
Cooling Capacity kW
Btu/h
Heating Capacity kW
Btu/h
Power Input Cooling/Heating W
Running Current Cooling/Heating A
Starting Current Cooling/Heating A
EER W/W
Btu/h.W
COP W/W
Power Supply Ø / V / Hz
Power Factor %
Air Flow Rate Indoor,Max m3/min(cfm)
Outdoor,Max m3/min(cfm)
Moisture Removal l/h
Sound Level Indoor,H/M/L dB(A)+3
Outdoor,Max dB(A)+3
Refrigerant & Charge g(oz)
Type
Model
Compressor Motor Type
Oil Type
Oil Charge cc
O.L.P Name
Type(In/Out)
Fan Motor Type
Motor Output W
Power Supply Cable No.*mm2
Dimension W*H*D mm
inch
Net Weight Indoor kg(lbs)
Tool Code(Chassis)
Temperature Control
Energy Saver Switch
Prefilter(washable/anti-fungus)
Plasma Filter
Steps, Fan/Cool/Heat
Airflow Direction Control(up&down)
Airflow Direction Control(left&right)
Remocon Type
Setting Temperature Cooling
Functions Range Heating
Auto Operation (Micom Control)
Panel Touch Type
Timer
Air Discharge
Air Ventilation
Deice Control(Defrost)
Hot Start
Look
Cabinet Type(Chassis Type)
Special Function
Models
LP070CEDC LP090CEDC LP120CEDC LP150CEDC
2.17 2.23 2.58 2.64 3.37 3.46 4.13 4.19
7400 7600 8800 9000 11500 11800 14100 14300
---- ----
---- ----
590 610 750 770 1025 1055 1410 1430
3.0 2.8 3.8 3.5 5.2 4.8 7.1 6.5
-/- -/- -/- -/- -/- -/- -/- -/-
3.68 3.66 3.44 3.43 3.29 3.28 2.93 2.93
12.5 12.5 11.7 11.7 11.2 11.2 10.0 10.0
---- ----
1 / 208 / 60 1 / 230 / 60 1 / 208 / 60 1 / 230 / 60 1 / 208 / 60 1 / 230 / 60 1 / 208 / 60 1 / 230 / 60
94.6 94.7 94.9 95.7 94.8 95.6 95.5 95.7
9.5(335) 9.5(335) 11(390) 11(390)
-- - -
0.9 1.2 1.5 2.0
45/-/43 45/-/43 49/-/47 49/-/47
60/58 60/58 63/61 63/61
R22, 650(22.75) R22, 790(27.9) R22, 630(22.2) R22, 735(25.9)
Rotary(Non Tropical) Rotary(Non Tropical) Rotary(Non Tropical) Rotary(Non Tropical)
2R10S236A6G 2R12S236A6J QK145KBJ QJ196KAC
PSC PSC PSC PSC
ATMOS M60 or SUNISO 4GDID ATMOS M60 or SUNISO 4GDID
SUNISO 4GSI SUNISO 4GSI
260 290 280 410
Internal Internal Internal Internal
Cross Flow Fan / Axial Fan Cross Flow Fan / Axial Fan Cross Flow Fan / Axial Fan Cross Flow Fan / Axial Fan
4 POLES 4 POLES 4 POLES 4 POLES
50 50 50 50
3*2.1 3*2.1 3*2.1 3*2.1
1066*406*505 1066*406*505 1066*406*505 1066*406*505
42*16*19-7/8 42*16*19-7/8 42*16*19-7/8 42*16*19-7/8
44.0(97) 44.1(97) 46.8(103) 50.4(111)
YA YA YA YA
Thermistor Thermistor Thermistor Thermistor
OO O O
OO O O
-- - -
2/2/2 2/2/2 2/2/2 2/2/2
Manual Manual Manual Manual
-- - -
-- - -
54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C)
54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C)
-- - -
Micom Micom Micom Micom
12h, On/Off 12h, On/Off 12h, On/Off 12h, On/Off
Rear Rear Rear Rear
OO O O
OO O O
-- - -
L-Look L-Look L-Look L-Look
-- - -
Electric Heater Electric Heater Electric Heater Electric Heater
Note:
O : Applied, - : No relation
* For circuit breaker rating, please conform to local standards wherever necessary.
❈ Some of functions are slightly different depending upon models.
❈ The specification may be subject to change without notice for purpose of improvement.

—5—
Note:
O : Applied, - : No relation
* For circuit breaker rating, please conform to local standards wherever necessary.
❈ Some of functions are slightly different depending upon models.
❈ The specification may be subject to change without notice for purpose of improvement.
1.1.2 HEATING ELECTRICAL
Cooling Capacity kW
Btu/h
Heating Capacity kW
Btu/h
Power Input Cooling/Heating W
Running Current Cooling/Heating A
Starting Current Cooling/Heating A
EER W/W
Btu/h.W
COP W/W
Power Supply Ø / V / Hz
Power Factor %
Air Flow Rate Indoor,Max m3/min(cfm)
Outdoor,Max m3/min(cfm)
Moisture Removal l/h
Sound Level Indoor,H/M/L dB(A)+3
Outdoor,Max dB(A)+3
Refrigerant & Charge g(oz)
Type
Model
Compressor Motor Type
Oil Type
Oil Charge cc
O.L.P Name
Type(In/Out)
Fan Motor Type
Motor Output W
Power Supply Cable No.*mm2
Dimension W*H*D mm
inch
Net Weight Indoor kg(lbs)
Tool Code(Chassis)
Temperature Control
Energy Saver Switch
Prefilter(washable/anti-fungus)
Plasma Filter
Steps, Fan/Cool/Heat
Airflow Direction Control(up&down)
Airflow Direction Control(left&right)
Remocon Type
Setting Temperature Cooling
Functions Range Heating
Auto Operation (Micom Control)
Panel Touch Type
Timer
Air Discharge
Air Ventilation
Deice Control(Defrost)
Hot Start
Look
Cabinet Type(Chassis Type)
Special Function
Models
LP070HED LP090HED LP120HED LP150HED
2.17 2.23 2.61 2.67 3.46 3.52 4.13 4.19
7400 7600 8900 9100 11800 12000 14100 14300
1.82 1.88 2.32 2.37 3.14 3.19 3.9 3.96
6200 6400 7900 8100 10700 10900 13300 13500
605/520 625/535 760/680 780/700 1085/950 1100/970 1440/1255 1460/1275
3.0/2.6 2.9/2.4 3.8/3.4 3.6/3.2 5.5/4.8 5.0/4.4 7.3/6.3 6.7/5.8
-/- -/- -/- -/- -/- -/- -/- -/-
3.58 3.57 3.43 3.42 3.19 3.2 2.87 2.87
12.2 12.2 11.7 11.7 10.9 10.9 9.8 9.8
3.5 3.5 3.4 3.4 3.3 3.3 3.1 3.1
1 / 208 / 60 1 / 230 / 60 1 / 208 / 60 1 / 230 / 60 1 / 208 / 60 1 / 230 / 60 1 / 208 / 60 1 / 230 / 60
97/96.2 93.7/96.9 96.2/96.2 94.2/95.1 94.8/95.2 95.7/95.8 94.8/95.8 94.7/95.6
9.5(335) 9.5(335) 11.0(390) 11.0(390)
--- -
0.9 1.2 1.5 2.0
45/-/43 45/-/43 49/-/47 49/-/47
60/58 60/58 63/61 63/61
R22, 685(23.99) R22, 860(30.3) R22, 815(28.8) R22, 1050(37.0)
Rotary(Non Tropical) Rotary(Non Tropical) Rotary(Non Tropical) Rotary(Non Tropical)
2R10S236A6G 2R12S236A6J 2P17S236A1C QJ196KAC
PSC PSC PSC PSC
ATMOS M60 or SUNISO 4GDID ATMOS M60 or SUNISO 4GDID ATMOS NM56M or SUNISO 4GDID SUNISO 4GSI
260 290 350 410
Internal Internal Internal Internal
Cross Flow Fan / Axial Fan Cross Flow Fan / Axial Fan Cross Flow Fan / Axial Fan Cross Flow Fan / Axial Fan
4 POLES 4 POLES 4 POLES 4 POLES
50 50 50 50
3*2.1 3*2.1 3*2.1 3*2.1
1066*406*505 1066*406*505 1,066*406*505 1,066*406*505
42*16*19-7/8 42*16*19-7/8 42*16*19-7/8 42*16*19-7/8
46.0(101) 46.1(102) 49.8(110) 52.4(116)
YA YA YA YA
Thermistor Thermistor Thermistor Thermistor
OOO O
OOO O
--- -
2/2/2 2/2/2 2/2/2 2/2/2
Manual Manual Manual Manual
--- -
--- -
54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C)
54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C)
--- -
Micom Micom Micom Micom
12h, On/Off 12h, On/Off 12h, On/Off 12h, On/Off
Rear Rear Rear Rear
OOO O
OOO O
--- -
L-Look L-Look L-Look L-Look
--- -
Electric Heater Electric Heater Electric Heater Electric Heater

—6—
Cooling Capacity kW
Btu/h
Heating Capacity kW
Btu/h
Power Input Cooling/Heating W
Running Current Cooling/Heating A
Starting Current Cooling/Heating A
EER W/W
Btu/h.W
COP W/W
Power Supply Ø / V / Hz
Power Factor %
Air Flow Rate Indoor,Max m3/min(cfm)
Outdoor,Max m3/min(cfm)
Moisture Removal l/h
Sound Level Indoor,H/M/L dB(A)+3
Outdoor,Max dB(A)+3
Refrigerant & Charge g(oz)
Type
Model
Compressor Motor Type
Oil Type
Oil Charge cc
O.L.P Name
Type(In/Out)
Fan Motor Type
Motor Output W
Power Supply Cable No.*mm2
Dimension W*H*D mm
inch
Net Weight Indoor kg(lbs)
Tool Code(Chassis)
Temperature Control
Energy Saver Switch
Prefilter(washable/anti-fungus)
Plasma Filter
Steps, Fan/Cool/Heat
Airflow Direction Control(up&down)
Airflow Direction Control(left&right)
Remocon Type
Setting Temperature Cooling
Functions Range Heating
Auto Operation (Micom Control)
Panel Touch Type
Timer
Air Discharge
Air Ventilation
Deice Control(Defrost)
Hot Start
Look
Cabinet Type(Chassis Type)
Special Function
Models
LP091HEM LP121HEM
2.61 2.67 3.46 3.52
8900 9100 11800 12000
2.31 2.37 3.14 3.19
7900 8100 10700 10900
760/690 775/705 1085/950 1100/970
3.9/3.6 3.5/3.2 5.4/4.8 5.0/4.4
-/- -/- -/- -/-
3.43 3.45 3.19 3.2
11.7 11.7 10.9 10.9
3.4 3.4 3.3 3.3
1 / 208 / 60 1 / 230 / 60 1 / 208 / 60 1 / 230 / 60
93.7/92.1 96.3/95.8 95.6/95.2 95.7/95.9
9.5(335) 11.0(390)
--
1.2 1.5
45/-/43 49/-/47
60/58 63/61
R22, 860(30.3) R22, 815(28.8)
Rotary(Non Tropical) Rotary(Non Tropical)
2R12S236A6J 2P17S236A1C
PSC PSC
ATMOS M60 or SUNISO 4GDID ATMOS NM56M or SUNISO 4GDID
290 350
Internal Internal
Cross Flow Fan / Axial Fan Cross Flow Fan / Axial Fan
4 POLES 4 POLES
50 50
3*2.1 3*2.1
1066*406*505 1,066*406*505
42*16*19-7/8 42*16*19-7/8
46.1(102) 49.8(110)
YA YA
Thermistor Thermistor
OO
OO
--
2/2/2 2/2/2
--
OO
--
54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C)
54°F~86°F(12.2°C~30°C) 54°F~86°F(12.2°C~30°C)
--
Mechanical Mechanical
--
Rear Rear
OO
OO
--
L-Look L-Look
--
Electric Heater Electric Heater
Note:
O : Applied, - : No relation
* For circuit breaker rating, please conform to local standards wherever necessary.
❈ Some of functions are slightly different depending upon models.
❈ The specification may be subject to change without notice for purpose of improvement.
1.1.3 MECHANICAL

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.
—7—
INDOOR
REAR GRILLE
(Aluminum Rear Grille)
EXPANDED METAL GRILLE
(Superior for a performance)
SLEEVE ASSEMBLY
(Including Aluminum Rear Grille)
THE SLEEVE ANDTHE 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˚F to
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.
—8—

—9—
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

—10—
•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.

—11—
•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 servicer 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 switches #1 - #3.
This temperature limiting is not available with the Remote Wall Thermostat.
LOCAL
1OFF
2OFF 3OFF 4OFF 5
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
PTAC/PTHP
UNIT TYPE
LOCALLOCAL
1OFF
OFF
2OFF
OFF
3OFF
OFF
4OFF
OFF
5
LOCAL
1OFF
2OFF 3OFF 4OFF 5
LOCAL
LOCAL
1OFF
OFF
2OFF
OFF
3OFF
OFF
4OFF
OFF
5
LOCAL
1OFF
2OFF 3OFF 4OFF 5OFF 6OFF 7
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
Cooling+Electric Heater+Heat PumpOFFOFF Cooling+Electric HeaterONOFF
Cooling Only
Heat Pump Only
Unit Type
ON
OFF
#7
ON
ON
#6
1.4 ADDITIONAL CONTROLS

—12—
•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 switch #1 - #3.
This temperature limiting is not available with the Remote Wall Thermostat.
OFF OFF OFF 54°F (12.2°C) 86°F (30.0°C) 54°F (12.2°C) 86°F (30.0°C)
ON OFF OFF 56°F (13.3°C) 86°F (30.0°C) 54°F (12.2°C) 84°F (28.9°C)
OFF ON OFF 58°F (14.4°C) 86°F (30.0°C) 54°F (12.2°C) 82°F (27.8°C)
ON ON OFF 60°F (15.5°C) 86°F (30.0°C) 54°F (12.2°C) 80°F (26.7°C)
OFF OFF ON 62°F (16.6°C) 86°F (30.0°C) 54°F (12.2°C) 78°F (25.5°C)
ON OFF ON 64°F (17.7°C) 86°F (30.0°C) 54°F (12.2°C) 76°F (24.4°C)
OFF ON ON 66°F (18.9°C) 86°F (30.0°C) 54°F (12.2°C) 74°F (23.3°C)
ON ON ON 68°F (20.0°C) 86°F (30.0°C) 54°F (12.2°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
•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.
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
LOCAL
1OFF
2OFF 3OFF 4OFF 5
LOCAL
1OFF
2OFF 3OFF 4OFF 5
LOCAL
1OFF
2OFF 3OFF 4OFF 5
LOCAL
1OFF
2OFF 3OFF 4OFF 5

Wiring Schematic for
Remote Heat Pump
Wiring Schematic for
Straight Cool Unit.
—13—
•REMOTE/LOCAL CONTROL
When remote/local switch #1 is on, it allow the unit to operate by the 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 FD2 and FD1, 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 operates according to the setting without working
compressor and heater. When the front desk switch is OFF, the unit can operate according to the setting of controls.
•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 24 Volt AC. See the
installation Instruction in this manual for the Remote Wall Thermostat.
Note: The following figures show wiring
schematics for heat pump and straight
cool units with electric heat, respectively.
GL GH O W Y R C
Low Fan
High Fan
Reversing Valve
Heater
Compressor
24 Volt-L
24 Volt-N
Wire # AWG Maximum Length
#22 600 ft (180 m)
#20 900 ft (270 m)
#18 1500 ft (450 m)
#16 2000 ft (610 m)
FD2 FD1 DR2 DR1 MS2 MS1
Front Desk Control
Front Desk Control
Door Switch
Door Switch
Motion Sensor
Motion Sensor
(Molex Housing Spec 396-06V)
(Molex Housing Spec 396-07V)

—14—
(Molex Housing Spec 396-09V)
•FRONT DESK CONTROL
When the pair wire is connected to the connector LOand 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.
•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.
•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 continuous 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.
Wire # AWG Maximum Length
#22 600ft(180m)
#20 900ft(270m)
#18 1500ft(450m)
#16 2000ft(610m)
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.

—15—
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

—16—
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
—17—
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

—18—
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

—19—
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

—20—
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.
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.
WARNING