LG PS-N550WPR User manual

MODEL: PS-N550WP
CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS
MANUAL.
삼흥
정판
P/NO : MFL31520605
February, 2007
Printed in Korea
AIR PURIFIER
SERVICE MANUAL
Website http://biz.lgservice.com

CONTENTS
CONTENTS
-2-
SECTION
1
PAGE 3~5
SECTION
2
PAGE 6
SECTION
3
PAGE 7
SECTION
4
PAGE 8~16
SECTION
5
PAGE 17~24
SECTION
6
PAGE 25
SECTION
7
PAGE 26~30
SECTION
8
PAGE 31~33
Safety instructions
Logics
Major Specifications of each
Model
Operations/Functions Manual
Main Components
Disassemble/Assemble and
Repair Instruction
Electric diagram
Troubleshooting and inspection
direction
PCB Circuit Diagram/Parts
Layout
SECTION
9
PAGE 34~36
Exploed View/
Svc Components inventory

-3-
1Safety instructions
For your safety, the information in this manual must be followed to minimize the risk of fire or explosion, electric
shock, or to prevent property damage, personal injury, or death.
When Installation
Warning : This symbol will alert you to hazards or unsafe practices which could cause bodily injury or
property damage.
Caution : This symbol will alert you to the possibility of improper use that may result in damage.
Read instructions to avoid damage or injury.
󳢯If the power cord becomes worn or damaged, the cord should only be replaced by a qualified service technician
using genuine replacement parts.
󳢯Do not plug other appliances into the same outlet. Overloading of any outlet can cause a fire or create an electrical
shock hazard.
󳢯Do not remove the round grounding prong from the plug.
󳢯Do not operate this or any electrical appliance when you smell gas.
󳢯Do not operate with wet hands or in a damp environment.
󳢯Do not disassemble or modify the air purifier or the power cord.
󳢯Do not use this or any appliance near flammable gases or liquids or other combustibles, such as gasoline, benzene,
thinner, etc.
󳢯If you hear abnormal sounds or smell smoke, immediately unplug your Air Purifier and have the unit checked by a
qualified technician.
󳢯Make sure the Air Purifier and cord is positioned where it does not create a tripping hazard. Do not roll heavy
furniture over the top of the cord.
󳢯Do not use near open flames.
󳢯
Keep this product out of the direct rays of the sun or other heat sources. Do not use the unit near water sources that could allow
moisture to enter the unit. Overheating and/or water infiltration could lead to a fire or shock hazard and could result in failure of the
product.
Warning
Warning / Caution

-4-
1Safety instructions
In-Use
󳢯Make sure the power cord is plugged firmly and completely into the outlet.
󳢯Do not operate with wet hands.
󳢯If the power cord ever becomes frayed or damaged, do not attempt to repair. The cord should be replaced by a
qualified technician.
󳢯Never pull the power plug away from outlet by pulling on the wire. Always grasp the cord by the receptacle end.
󳢯Do not install a place where there are much industrial Oil dust or metallic dust.
󳢯If may cause fire and failure of product.
󳢯When the power code is damaged, it should be repaired by the qualified person to prevent any risk.
󳢯It may cause electric shock, fire or failure of product.
󳢯Never pour or allow water to run onto or into the unit; it could damage internal components and create a shock
and fire hazard.
󳢯Keep objects such as curtains away from the air openings in the unit. The openings must be free from
obstruction for the unit to work efficiently.
󳢯Do not run power cords under carpeting or other coverings which could fray the cord and expose the wires.
Frayed cords are a shock and fire hazard.
󳢯Do not place the power cord or Air Purifier near a heater, radiator, or other heat source.
󳢯This air purifier is not designed for use by young children. Young children should be supervised to ensure that
they do not play with or climb on the air purifier.
󳢯Do not use your Air Purifier to remove hair spray and insecticides from a room. These chemicals not only clog
the filters but could damage the unit.
󳢯Secure the air purifier to prevent it from rolling on smooth floors. When moving the product, insure that the
power cord is unplugged from the wall.
󳢯Do not move the air purifier by pulling or pushing on the front panel.
󳢯Do not use the top of the unit for storage. Keep liquids away from the top of the unit.
󳢯Other than cleaning and replacing the filters, there are no user replaceable components in your Air Purifier.
Service of this unit should be referred to a qualified service technician.
󳢯Do not apply pressure to the front panel of the air purifier.
󳢯Keep hands and objects away from the air inlet and outlet.
󳢯Do not clean the unit by submerging in water. Water in the unit will damage the insulation and create an
electrical shock hazard. If water enters the unit, unplug immediately and contact Customer Service.

-5-
1Safety instructions
Caution
When Installation
In-Use
󳢯When using the unit, maintain a distance of at least 3 feet between the Air Purifier and any Television or audio
product.
󳢯Avoid installing the Air Purifier in direct sunlight and never operate the unit near or around open flames or other
heat sources.
󳢯Never use your Air Purifier to remove toxic gasses (such as Carbon Monoxide, Natural or Liquified Petroleum
Gasses).
󳢯
Do not use your Air Purifier to remove food odors while cooking. Airborne oils that are released during cooking will plug the
filters. Wait until cooking is completed before operating your Air Purifier.
󳢯Install the unit on a stable, flat surface. Do not drop the unit.
󳢯Maintain a minimum distance of 5 ft from any heat producing light source. For proper ventilation, maintain a
distance of 6 inches or more from a wall.
󳢯Do not use except AC 120V.
󳢯It may cause fire or electrical shock.
󳢯This unit is not designed to remove combustion by-products such as those produced by open flame burners.
Toxic substances such as carbon monoxide should be ventilated from the room by either using an exhaust fan or
by opening a window.
󳢯Your air purifier is not designed to be used in moving vehicles such as cars, RV's or boats.
󳢯
To prevent damage to plants or injury to pets, make sure they are not exposed to direct air flow from the air purifier. This unit is
not intended to be used for the preservation of art objects or precision machinery.
󳢯Clean with a soft cloth and mild detergent. Filter should be cleaned once a month.
󳢯Do not start or stop operation by plugging in or unplugging the power cord.
󳢯
Always turn off and unplug the air purifier when it will not be used for extended periods of time. This conserves energy and
reduces the chance of accidents.
󳢯Clean filters on a regular basis. Improper filter maintenance can cause premature failure of the product.
󳢯Turn off and unplug the unit before disassembling the unit for cleaning.
󳢯A damaged filter can create an electrical hazard.
󳢯If a humidifier is used in the same room as your Air Purifier, keep the humidifier a safe distance away from the Air
Purifier. Moisture from the humidifier could clog the filters and create an electrical shock hazard.
󳢯
Do not use your Air Purifier to remove food odors while cooking. Airborne oils that are released during cooking will plug the
filters. Wait until cooking is completed before operating your Air Purifier.
󳢯Do not open the front panel during the operation of the product.
󳢯Opening the front panel stops the operation.
󳢯Keep batteries out of reach of children.
󳢯After washing your filters, make sure they are completely dry before reinserting them into the Air Purifier. Do not run
your Air Purifier with wet filters.
󳢯Keep flammable products away from your Air Purifier. Failure to keep flammable products away from your purifier
could lead to premature failure or create a fire hazard.

-6-
2Logics
Terminology
1-1. Negative ion
(1) What is a negative ion?
Atomic element in the air with negative electrons
that releases a refreshing feeling. It can be found
in a forest, waterfalls, thermal spring and etc. If
the atom loses an electron, it turns into a positive
ion. If the atom gains an electron, it turns into an
negative ion.
(2) The platinum three-dimensional anti-
bacteria system.
99.9% highly purified platinum catalyst filter
completely removes those factors which could
cause the sickhouse syndrome such as VOCs,
harmful chemical element and its smell.
1-2. VOCs (Volatile organic
compounds)
(1) What is VOCs?
Carcinogenic substances that cause allergies or
respiratory ailments, such as a paint, adhesives,
spray, construction materials, wax, carpet, and
etc. Unlike the general perception that only cheap
construction materials emit VOCs, high quality
new constructions may also emit VOCs. It may
stay remained in a closet or inside of furniture
even after several years.
Filters Introduction
(1) Pre-Filter
One filter performs antibiotic treatment, anti mold
treatment, and dust removal, providing a purified
air.
(2) Photo-Catalyst Plasma Filter
Photo-Catalyst Plasma Filter removes
microscopic motes, odor, yellow-dusts, and
allergy causing substance through a 3 stage
process, plasma generation part, dust collecting
part, and photo-catalyst filter
(3) Anti-allergic Filter.
The anti-allergic filter could absorbs and
decomposes the ingredients which causes the
allergy, having the allergy preventive effect also
removing the odor and anti-bacteria effect.
(4) Washable HEPA Filter
HEPA filter polluted by acarid deadbody, pollen,
small dust and float mildew, animal bodyhair etc.
can be washed.
(5) Washable Deodorization Filter
This filter was processed with activation treatment
for stronger adsorption function (characteristic of
charcoal). This deodorization filter has higher
level of negative ion, minerals, far infrared lays
generation ability than charcoal.

-7-
3
Major specifications on each model
Model name
Power Supply
Measurement(W×H×D)
Application Space
Weight
Color
Design
Power usage
Noise
Wind speed(CMM)
Negative ion Generation
Inhale system
Purifying system
Major Filter System
Filter composition
Remote controller
Sensor
Display
Display Information
Operation Mode
Function Selection
Wind Speed
PS-N550WPR
120V~60Hz
426mm × 568mm × 271mm
45m2
12.0kg
Red
Easy design for convenient operation
55W(Turbo)
Turbo(47dB)
Turbo(6.4CMM)
Generate 1million super negative ions
side surface inhale system
Three dimension filter system
Pre-filter - Anti-allergic filter - Washable HEPA Filter -
Super Negative ion/ Sterilization
Washable part - Replacement part
Ez remote controller
Digital 2 Sensor(dust, smell)
Digital Wide LED display
Dust, Smell, Purity level, Fan speed, Filter Checking, Function
Selection, Operation Mode, Reservation time
Speed, Automatic, Yellow Sandstorm, Sleeping
Negative ion, Sterilization
Turbo-Strong-Soft-Weak

-8-
4
Operations/Functions Manual
Spare part Name
Time reservation display
Power On/Off button
Off timer button
Purity level indicator
Level reflects how well the air purifier is
cleaning the air.
Negative ion/ sterilization
indicator
Operation mode indicator
Fan speed indicator
Operation indicator
Fan speed button
Operation mode button
ION button
Remote controller receiver
Dust/Odor indicator
Reflects how well air is moving through
the unit.
Filter self-checking indicator
Check the filter when indicated by the light.
Dust Sensor
Power Plug
Safty Net:
The inside of air outlet
Filter case
(Allergen filter + HEPA filter +
deodorizing filter)
Odor sensor
Photo-Catalyst Plasma Filter
Pre-filter
Front panel
Mainframe
Display and controller

-9-
4
Operations/Functions Manual
󱎲
󱎳
󱎴
Filter system (include the filter part only)
Removes large particles
Anti-bacteria function
Anti- mildew function
󱎵
󱎶
Plasma dust-absorb filter
Plasma deodorant filter
Filters large particles such as pollen, soot, and mildew.
Absorbs odors and dust.
Additional odor absorption and large particle filtering.
Remove odor particles, VOCs, smoke smell, musty smell, decompose malodor ingredients and chemicals.
This filter has anti-bacteria, anti-mildew, and large particle filtering functions.
In extreme filtering conditions, these filters may have to be cleaned or
replaced more often.
Pre-filter
Plasma filter
󱎷
󱎸
Photo-catalyst anti-bacteria filter
Photo-catalyst deodorant filter
󱎹
Anti-allergic filter Absorbs and eliminates allergens.
󱎺
Washable HEPA filter
Washable HEPA filter removes pollens, dirt particles, dust and mildew
from the air.
Eliminates food, pet and other odors. Removes alkaline, acid and organic
compound odors.
This filter uses jewelry grade platinum and should be disposed of properly
when discarded.
Photo-
catalyst
filter
󱎻
󱎼
Washable carbon
Catalyst function
Nano Platinum filter
※Allow the filter to dry completely before reinstalling. If not completely dried, it may cause the air purifier to malfunction or cause bad odors to be emitted during use.
※A replacement filter (Anti-Allergic Filter) can be purchased at an LG service center.
Washable
deodorization
filter
Filter name Function Washing/Replacement cycle
Once a month
Once a month
6~12 months replacement cycle
Every 6 months
Every 6 months
Remote Controller
Power On/Off
Turns the air purifier on and off
Mode
Switches the operation speed, auto mode, sand
mode and sleep timer.
ION button
When turned on, the unit produces negative ions
which can help sterilize the air.
Fan speed button
Set Fan speed
Off timer button
Adjust the timer delay time
Remote Control
Must be aimed at the remote control receiver window on
the main unit.

-10-
4
Operations/Functions Manual
• Remove batteries when the air purifier is stored for extended periods of time.
• If controller fails to work after new batteries are installed, contact an LG service center for service.
Battery Installation Caution
Press locking tab on the battery
cover on the back of the remote
and remove the cover.
Insert new batteries into the
battery compartment, being sure
to note the proper polarity.
Reattach the battery cover,
making sure the locking tab
clicks into place.
Press only one button on the
remote at one time.
Press only one button on the remote at one time.
Pressing two or more buttons simultaneously will
prevent the remote from working properly.
Do not drop or otherwise damage
the remote.
Keep remote away from water.
Keep remote away from heat
sources or open flames.

-11-
4
Operations/Functions Manual
Operation Mode
1
1
2
3
1
2
3
1
Power ON/OFF
Turns the air purifier on and off. Press once to turn on, again to turn it off.
A confirmation tone will sound to indicate that the unit is powering on or turning off.
The unit will also produce a tone when the unit is first plugged in.
What is "Start-up Operation"
When first turned on, the unit will go through
Start-up function which prepares the unit for
operation. During this 2 minute period, the
display will fluctuate to indicate that the unit is
sensing the air quality in the room.
Air Purifying Operation Purify Indoor Air
󱎲
Power ON/OFF
Speed mode User may manually adjust fan speed
Automatic mode Air Purifier will automatically set the most appropriate Fan speed.
󱎲
Power ON/OFF
󱎲
MODE switches allows the user to select the
various modes of operation including auto fan
and sleep, sandstorm and self timer modes.
󱎳
Automatic Mode
• When in AUTO mode, the fan speed is automatically selected by
the unit depending on pollution levels. Even in the AUTO mode,
however, the user can still increase or decrease the fan speed by
one level by depressing the fan speed button.
• The AUTO function only automates the fan speed. All other
functions need to be set by the consumer.
󱎳
Fan Speed
Adjusts the circulation fan speed between low, medium, high and
turbo.
• The default speed is low.
• When the unit is shut off and restarted, the fan speed will default
to the last fan speed used.
󱎴

-12-
4
Operations/Functions Manual
2
1
2
1
Power ON/OFF
󱎲
Switch to sandstorm mode by pressing the mode
button.
The correct fan speed will automatically be selected by the unit.
The consumer can increase the fan speed to the next highest level
by depressing the fan speed button.
When in the sandstorm mode, the unit will automatically select the
proper fan speed. All other functions must be manually selected by
the consumer.
󱎳
Yellow Sandstorm Mode Purifies indoor air even in extreme conditions such as a sandstorm
Power ON/OFF
󱎲
Press MODE button until the SLEEP light
illuminates on the unit.
When in the SLEEP mode, the unit will automatically select low fan
speed. The consumer can increase the fan speed to the next
highest level by depressing the fan speed button.
󱎳
Sleeping Mode Provide quiet indoor atmosphere while sleeping

-13-
4
Operations/Functions Manual
Additional Function
2
1
2
1
2
1
2
1
Power ON/OFF
󱎲
Allows you to set a delay from 1 to 9 hours that will turn the
air purifier off automatically.
When this mode is selected, the unit will automatically select 3 hours of run time. If
more time is required, press the timer button again. Each time the button is
depressed, the run time will increase by 1 hour. At the end of the selected time, the
unit will automatically shut off.
• Maximum reservation time is 9 hours
• Shut down automatically.
• Automatically shut down 3 hours later.
󱎳
Off timer mode function Automatically shuts down after a preset amount of time
Example:shut down automatically after 3 hours
Power ON/OFF
󱎲
Press the function button to choose expected function.
• Press button each time, switch according to ‘negative ion - negative ion+sterilization - function abort
- negative ion’ sequence.
In the Negative Ion mode, the unit generates and adds negative ions to the air stream. When
in the sterilization mode, the negative ions will also remove bacteria from the air.
󱎳
Negative ion / sterilization function

-14-
4
Operations/Functions Manual
1
1
Filter self check light indicates to check filter.
󱎲
Power ON/OFF to shut the unit off.
󱎳
Open front panel to remove filter. Check filter, clean if necessary.
(see page 15 to clean filter).
• How often filter must be cleaned will depend on use and air conditions in the home.
󱎴
Filter Checking Function May remind users to clean or replace the filter after use for a certain period.
Exterior Cleaning Method
Dust sensor cleaning method
Wipe the exterior of the air purifier with a soft cloth with warm water and mild detergent.
The dust sensor senses both small and large dust particles. The sensor needs to be wiped clean to
maintain high performance.
Open the front panel to access the the dust sensor cover.
• Do not use harsh cleaners or very hot water. Do not wash in dishwasher.
• Never pour water onto the unit; it could damage internal components and
create a shock and fire hazard.
Clean the sensor lens every 6 months. If the environment is very dusty, more
frequent cleaning is recommended
Caution
󱎲
Open the dust sensor cover.
󱎳
After cleaning the lens, close the cover of the dust sensor in the reverse order.
Wipe the sensor lens of with a cotton swab.
󱎴

-15-
4
Operations/Functions Manual
• The prefilter should be cleaned on a monthly basis.
• Check the filter when the filter indicator light is on.
Filter Cleaning
Turn unit off and unplug before cleaning.
Grasp the grips on the front panel, pull forward to open.
󱎲
Remove the filter from the mainframe. Clean or replace.
󱎳
Clean the pre-filter with a vacuum or soft brush.
󱎴
Photo Catalyst Plasma Filter Cleaning
Soak the filter in warm water with a mild detergent for 1 hour. Remove
particles from the filter by shaking the water from the filter. Rinse the
filter with warm water. Completely dry the filter before replacing the
filter.
The ionization wire inside of the filter case is fragile. Please clean with care.
Use a soft cloth when cleaning the photo catalyst plasma filter. The filter coating may peel
resulting in reduced performance.
󱎵
Separate filter case to remove the filter.
󱎶
HEPA and Deodorizing washable filter. Soak in warm water for an hour. Rinse.
NOTE: The anti allergic filter should NOT be washed. Washing this filter will
reduce its efficiency.
Clean the washable HEPA filter and deodorization filter with warm water and rinse under running
water. Dry filter in a well ventilated room until completely dry.
• Clean Pre-Filter with vacuum or soft brush and
mild detergent.
• Do not use water over 40 degrees Celcius
(105 degrees F)
• Do not allow Anti Allergic filter to become wet.
• For your safety, turn off and unplug the air purifier before cleaning.
• Allow the filters to completely dry before using.
• Utilizing the unit before all the filters are completely dry may result in the creation of odors from the unit.
• Replace filter when unable to remove all dirt on the filter.
• Please do not rub the filter in your hands.
󱎷
Replace Anti Allergic filter every 6 to 12 months.
󱎸
Caution
Filter Type
Pre-Filter
Photo-Catalyst Plasma Filter
Washable HEPA Filter
Washable deodorization Filter
Washing Cycle
Once a month
Every 6 months
Every 6 months

-16-
4
Operations/Functions Manual
Maintenance
Remove plug from grounded outlet.
󱎲
Clean and protect the air purifier's mainframe.
Cover the air purifier when storing for an extended period of time.
󱎳
Clean with a soft cloth and mild detergent.
Exterior case may scratch easily

-17-
5
Major components Disassemble
Assemble and Repair instruction
Please read this before you disassemble
Please unplug the power before disassemble.
1. Most components are connected with bolts or mounted on the other parts. Please
disassemble according to the instruction.
2. Please do not disassemble unless it is absolutely necessary. Do not disassemble any part
that is not on the disassemble instruction.
Please unplug the power before disassemble
Replacing a fan, or a motor
1. Please remove 6 screws from the Case Back using
a Screw Driver(+). Take Handle Cover and Back
Cover off.
2. Unscrew bolts using a wrench.
(Turn it counter clockwise.)

-18-
5
Major components Disassemble
Assemble and Repair instruction
3. FAN is disassembled by holding and pulling fan.
4. Please remove 3 screws from the Motor Cover
using a Screw Driver(+).
5. Remove the Motor Cover. Take out the Motor.
Please be careful not to damage the Motor wire
when removing the motor.

-19-
5
Major components Disassemble
Assemble and Repair instruction
When replacing the display PCB and the touch key
1. Open the door assembly
2. Loosen the screws on the back of the display cover (3
positions)
Disconnect one wire and 2 connectors
When removing the display cover, disconnect a touch
key connector
3. Loosen the screws on the front of the display cover (4
positions)

-20-
5
Major components Disassemble
Assemble and Repair instruction
How to replace the tempered glass and the touch
key
1. Open the door assembly
2. Loosen the screw (1 position)
Open the cover and disconnect one wire and 2
connectors
Remove the door assembly by pulling up.
3. Loosen the screws of the 8 positions on the door
assembly.
Remove the upper and lower deco covers.