LG LP093CD3B User manual

LG Packaged Terminal
Air conditioner
SVC MANUAL(Exploded View)
MODEL:LP09 3CD3B
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

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Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Models
Cooling Capacity kW
Btu/h.
Heating Capacity(For heat pump models) kW
Btu/h.
Electric Heater capacity kW kW
Btu/h.
Power Input Cooling/Heating W
Running Current Cooling/Heating A
Starting 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 Indoor,Max m
3
/min(CFM)
Outdoor,Max m
3
/min(CFM)
Moisture Removal l/h
Sound Level Indoor,H/M/L dB(A)±3
(SOUND PRESSURE,1M) Outdoor,Max dB(A)±3
Refrigerant & Charge g(oz)
Compressor Type
Model
Motor Type
Oil Type
Oil Charge cc
O.L.P Name
Fan Type(In/Out)
Motor Type(In/Out)
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 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 Controller Type
Setting Temperature Cooling
Range Heating
Auto Operation (Micom Control)
Panel Touch Type
Timer
Air Discharge
Air-Ventilation
Defrost Control
Hot Start
Look
Cabinet Type(Chassis Type)
Special Function
LP093CD3B
87.237.2
005,9003,9
--
--
5.31.3
009,11005,01
730 745
3.7 3.4
--
14.9 15.2
7.217.21
7.37.3
--
1/208/60 1/230/60
95 95
19.5
20
7.6(268)
17(600)
2.6
48/-/46
63
R410A, 600(21.2)
Rotary
GA080KBA
PSC
230
B145-155-241E
Cross Flow Fan Axial Fan
BLDC
26/66
2R*10C*19FPI
3R*17C*20FPI
3*2.1
1,066*406*536
42*16*21
43.0(94.8)
YA
Thermistor
O
O
-
2/2/2
Manual
-
Wall Thermostat
54°F~86°F(12.2°C~30°C)
54°F~86°F(12.2°C~30°C)
-
Micom
12h, On/Off
Rear
O
-
-
L-Look
Slide In-Out
Electric Heater
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.
PVE(RB68A) or POE(FVC68D)
1. Specification

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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)

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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.
• 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.
• 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”

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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

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Copyright ©2009 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.
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 1°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.

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
-7-

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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

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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

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Copyright ©2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Wiring Schematic for
Remote Heat Pump
Wiring Schematic for
Straight Cool Unit.
• 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)