LG LP073HDUC User manual

LG Packaged Terminal
Air conditioner/Heat Pump
SVC MANUAL(Exploded View)
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Internal Use Only
http://biz.lgservice.com
MODEL : LP073HDUC LP093HDUC
LP123HDUC LP153HDUC

- 2-
Copyright ©2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1. Specification
Note:
O
: Applied, - : No relation
* For circuit breaker rating, please confirm to local standards wherever necessary.
Some of functions are slightly different depending upon models.
The specification may be subject to change without prior notice for purpose of improvement.
208-230V HEAT PUMP MODELS
Buyer Models
LG Models
Cooling Capacity kW
Btu/h.
Heating Capacity ( for Heat Pump models) kW
Btu/h.
Electric Heater capacity kW
Btu/h.
Power Input Cooling/Heating W
Running Current Cooling/Heating A
Electric Heater Current A
EER W/W
Btu/h.W
COP W/W
Power Supply Ø / V / Hz
Power Factor %
MCA A
MOP A
Air Flow Rate
Ventilation (Fresh Air Intake)
Indoor,Max(H/L) m
3
/ min(CFM)
Outdoor,Max m
3
/ min(CFM)
Dehumidification pts/h
Sound Level Indoor,H/M/L dB(A)±3
Outdoor,Max dB(A)±3
Refrigerant & Charge g(oz)
Compressor
Type
Model
Motor Type
Oil Type
Oil Charge cc
Capacitor µF
RLA/LRA A
O.L.P Name
Fan
Type(In/Out)
Motor Type(In/Out)
FLA(In/Out) A
Motor Output(In/Out) W
Heat Exchanger Evaporator Rows * Column * FPI
Condensor Rows * Column * FPI
Power Supply Cable (Power Cord) No.*mm
2
Dimensions ( W * H * D) mm
inch
Net Weight kg(lbs)
Tool Code(Chassis)
Features
Operating Range Voltage (Min/Max)
Temperature Control
Energy Saver Mode
Prefilter(washable/anti-fungus)
Plasma Filter
Steps, Fan/Cool/Heat
Airflow Direction Control(up&down)
Airflow Direction Control(left&right)
Remote Control
Setting Temperature
Range
Cooling
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
LP073HDUC LP093HDUC
UYH073ALEU1 UYH093ALEU1
2.08 2.14 2.73 2.78
7,100 7,300 9,300 9,500
1.82 1.88 2.34 2.40
6,200 6,400 8,000 8,200
2.3/3.2/4.6 2.4/3.3/4.7
7,800/10,900/15,700 8,100/11,200/16,000
535/500 550/520 720/655 735/670
2.7/2.6 2.5/2.4 3.6/3.3 3.3/3.0
11.2/15.5/22.3 10.5/14.5/20.6
3.90 3.90 3.78 3.78
13.3 13.3 12.9 12.9
3.6 3.6 3.6 3.6
1 / 208 / 60 1 / 230 / 60 1 / 208 / 60 1 / 230 / 60
95 96 96 97
14.5/19.8/28.3 13.6/18.6/26.2
15/20/30
2.3/3.2/4.6 2.4/3.3/4.7
7,800/10,900/15,700 8,100/11,200/16,000
14.5/19.8/28.3 13.6/18.6/26.2
15/20/30
7.6(270)/6.3(225) 7.6(270)/6.3(225)
17(600) 17(600)
m
3
/ min(CFM)
1.42(50) 1.70(60)
1.7 2.6
45/-/43 46/-/44
61 61
R410A, 740(26.1) R410A, 910(32.1)
Rotary(Non Tropical) Rotary(Non Tropical)
GA060KAA GKU086KAB
PSC PSC
POE(RB68A)orPVE(FVC68D) POE(RB68A)orPVE(FVC68D)
310 330
15 25
2.9/16 4.0/19
B120-160-241E LMSH2Z69-L002
Cross Flow Fan Axial Fan Cross Flow Fan Axial Fan
BLCD / BLCD BLCD / BLCD
0.36/0.36 0.36/0.36
20/65 26/66
2R *12C *18FPI 2R *10C *19FPI
3R *17C *20FPI 3R *17C *20FPI
3 * 2.1 3 * 2.1
1,066*406*505 1,066*406*505
42*16*19-7/8 42*16*19-7/8
43(95) 48(106)
YA YA
187/253 187/253
Thermistor Thermistor
OO
OO
--
2/2/2 2/2/2
Manual Manual
--
Wall Thermostat Wall Thermostat
54℉~ 86℉(12.2℃~ 30℃) 54℉~ 86℉(12.2℃~ 30℃)
54℉~ 86℉(12.2℃~ 30℃) 54℉~ 86℉(12.2℃~ 30℃)
OO
Micom Micom
12h, On/Off 12h, On/Off
Top Top
OO
--
--
L - Look L - Look
Slide In-Out Slide In-Out
Electric Heater Electric Heater

- 3-
Copyright ©2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1. Specification
Note:
O
: Applied, - : No relation
* For circuit breaker rating, please confirm to local standards wherever necessary.
Some of functions are slightly different depending upon models.
The specification may be subject to change without prior notice for purpose of improvement.
Buyer Models
LG Models
Cooling Capacity kW
Btu/h.
Heating Capacity ( for Heat Pump models) kW
Btu/h.
Electric Heater capacity kW
Btu/h.
Power Input Cooling/Heating W
Running Current Cooling/Heating A
Electric Heater Current A
EER W/W
Btu/h.W
COP W/W
Power Supply Ø / V / Hz
Power Factor %
MCA A
MOP A
Air Flow Rate
Ventilation (Fresh Air Intake)
Indoor,Max(H/L) m3/ min(CFM)
Outdoor,Max m3/ min(CFM)
Dehumidification pts/h
Sound Level Indoor,H/M/L dB(A)±3
Outdoor,Max dB(A)±3
Refrigerant & Charge g(oz)
Compressor
Type
Model
Motor Type
Oil Type
Oil Charge cc
Capacitor µF
RLA/LRA A
O.L.P Name
Fan
Type(In/Out)
Motor Type(In/Out)
FLA(In/Out) A
Motor Output(In/Out) W
Heat Exchanger Evaporator Rows * Column * FPI
Condensor Rows * Column * FPI
Power Supply Cable (Power Cord) No.*mm2
Dimensions ( W * H * D) mm
inch
Net Weight kg(lbs)
Tool Code(Chassis)
Features
Operating Range Voltage (Min/Max)
Temperature Control
Energy Saver Mode
Prefilter(washable/anti-fungus)
Plasma Filter
Steps, Fan/Cool/Heat
Airflow Direction Control(up&down)
Airflow Direction Control(left&right)
Remote Control
Setting Temperature
Range
Cooling
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
LP123HDUC LP153HDUC
UYH123ALEU1 UYH153ALEU1
3.52 3.58 4.37 4.43
12,000 12,200 14,900 15,100
3.11 3.17 3.87 3.93
10,600 10,800 13,200 13,400
2.3/3.2/4.6 2.4/3.3/4.7
7,800/10,900/15,700 8,100/11,200/16,000
1,010/885 1,025/905 1,330/1250 1,345/1265
5.2/4.6 4.8/4.3 6.6/6.2 6.1/5.7
11.2/15.5/22.3 10.5/14.5/20.6 11.2/15.5/22.3 10.5/14.5/20.6
3.49 3.49 3.28 3.28
11.9 11.9 11.2 11.2
3.5 3.5 3.1 3.1
1 / 208 / 60 1 / 230 / 60 1 / 208 / 60 1 / 230 / 60
93 93 97 96
14.5/19.8/28.3 13.6/18.6/26.2
15/20/30
2.3/3.2/4.6 2.4/3.3/4.7
7,800/10,900/15,700 8,100/11,200/16,000
14.5/19.8/28.3 13.6/18.6/26.2
15/20/30
11.9(420)/10.0(353) 11.9(420)/10.0(353)
20(706) 20(706)
m3/ min(CFM)
1.98(70) 1.98(70)
3.0 4.3
50/-/48 51/-/49
63 64
R410A, 850(30.0) R410A, 910(32.1)
Rotary(Non Tropical) Rotary(Non Tropical)
GKU113KAB PA140M2C
PSC PSC
POE(RB68A) or PVE(FVC68D) ESTER OIL VG74
330 440
40 45
5.0/26 6.55/38.6
MRA98996-12026 INTERNAL
Cross Flow Fan Axial Fan Cross Flow Fan Axial Fan
BLCD / BLCD BLCD / BLCD
0.36/0.36 0.36/0.36
41/74 41/74
2R *10C *19FPI 2R *10C *19FPI
3R * 17C * 20FPI 3R *17C *20FPI
3 * 2.1 3 * 2.1
1,066*406*505 1,066*406*505
42*16*19-7/8 42*16*19-7/8
48(106) 52(115)
YA YA
187/253 187/253
Thermistor Thermistor
OO
OO
--
2/2/2 2/2/2
Manual Manual
--
Wall Thermostat Wall Thermostat
54℉~ 86℉(12.2℃~ 30℃) 54℉~ 86℉(12.2℃~ 30℃)
54℉~ 86℉(12.2℃~ 30℃) 54℉~ 86℉(12.2℃~ 30℃)
OO
Micom Micom
12h, On/Off 12h, On/Off
Top Top
OO
--
--
L - Look L - Look
Slide In-Out Slide In-Out
Electric Heater Electric Heater

- 4 -
Copyright ©2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1.1 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.
INDOOR
REAR GRILLE
(Aluminum Rear Grille)
EXPANDED METAL GRILLE
(Superior for a performance)
SLEEVE ASSEMBLY
THE SLEEVE AND THE REAR GRILLE
(Available as an option)
VERTICAL AIR DEFLECTOR
(Horizontal Louver)
AIR FILTER
INLET GRILLE
(Air Intake)

- 5-
Copyright ©2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
• 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.
• High Pressure limit
The compressor will be switched off to prevent damage by sensing high pressure [41.8 kgf/cm2G, (595 lbf/in2G)] when the unit
is operated in high outdoor temperatures or blocked outdoor inlet.
• Overheating Protection
This feature prevents melting of unit by electrical heater located inside of the unit at the remote mode (when the unit is
connected with wall thermostat). LED on the control panel displays “OP”
• Freeze Protection
This feature prevents freezing of room at low temperaure.
LED on the control panel displays “FP”

- 6-
Copyright ©2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1.2 CONTROL LOCATIONS
VENT
OPEN
VENT
CLOSE
• 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

- 7-
Copyright ©2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
• ELECTRONIC CONTROLS
The controls will look like one of the following.
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.
Fan will turn ON when the unit reaches setting temperature
even though compressor does not turn on due to 3 minutes
delay operation.
- 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 the time is set the desired temperature will rise 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(12°C) to 86°F(30°C) by increments of
1°F(0.5℃).
• The setting temperature 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)}
• To turn ON the air conditioner, push this button.
To turn OFF the air conditioner, push this button
again.
• This button takes priority over any other button.

Copyright ©2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1.3 SELF-DIAGNOSIS
FUNCTION:
If the unit has a malfunction, a green OPERATION LED located on the Display PCB used by the unit to indicate the errors.
USE:
If the customer has to register a complaint to the service center, he can be very clear about registering the complaint that what is
happening & by referring the user's manual the customer can clearly define the problem.
So that the engineer should go fully prepared with the prescribed tools to be used regarding that problem. It also keeps the customer
aware about the unit.
Here are some of the problems defined below for which the LED indicates by flashing.
The errors are the mentioned which is as follows:
•Electrical Controls
ON Normal
OFF No power / failed board
Fault Codes
CH 01
Indoor Air Thermistor Error
CH 02
Indoor Coil Thermistor Error
CH 07 Themostat Wiring Error
CH 09 EEPROM Check Sum Error
CH 10
Indoor Fan Error
CH 34 High Pressure Switch Error
CH 44
Outdoor Air Thermistor Error (PTHP Only)
CH 45
Outdoor Coil Thermistor Error (PTHP Only)
CH 67
Outdoor Fan Error
-8-

- 9-
Copyright ©2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
ON
ONREMOTE
OFF
ON ON ON
Remote/Local
Energy Saver
Temperature Limit 1
Temperature Limit 2
Temperature Limit 3
PTAC/PTHP
UNIT TYPE
LOCALLOCAL
1OFFOFF
2OFFOFF 3OFFOFF 4OFFOFF 5
LOCAL
1OFF
2OFF 3OFF 4OFF 5
LOCALLOCAL
1OFFOFF
2OFFOFF 3OFFOFF 4OFFOFF 5
LOCAL
1OFF
2OFF 3OFF 4OFF 5OFF 6OFF 7
LOCALLOCAL
1OFFOFF
2OFFOFF 3OFFOFF 4OFFOFF 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#3 #4 #5 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
• 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 #3 - #5.
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

- 10-
Copyright ©2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
• 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 #3 - #5.
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 #3 #4 #5
• 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
LOCALLOCAL
1OFFOFF
2OFFOFF 3OFFOFF 4OFFOFF 5
LOCAL
1OFF
2OFF 3OFF 4OFF 5
LOCALLOCAL
1OFFOFF
2OFFOFF 3OFFOFF 4OFFOFF 5
LOCAL
1OFF
2OFF 3OFF 4OFF 5