Website http://biz.lgservice.com
AIR PURIFIER
SERVICE MANUAL
MODEL: PS-N550WP
CAUTION
BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS
MANUAL.
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February, 2007 |
P/NO : MFL31520605 |
Printed in Korea |
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SECTION |
Safety instructions |
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1 |
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PAGE 3~5 |
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Logics |
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2 |
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PAGE 6 |
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Major Specifications of each |
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Model |
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PAGE 7 |
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Operations/Functions Manual |
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4 |
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PAGE 8~16 |
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Main Components |
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5 |
Disassemble/Assemble and |
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Repair Instruction |
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PAGE 17~24 |
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SECTION |
Electric diagram |
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6 |
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PAGE 25 |
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Troubleshooting and inspection |
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7 |
direction |
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PAGE 26~30 |
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PCB Circuit Diagram/Parts |
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8 |
Layout |
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PAGE 31~33 |
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Exploed View/ |
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9 |
Svc Components inventory |
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PAGE 34~36 |
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CONTENTS
-2-
Safety 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.
Warning / Caution
Warning :
Caution :
This symbol will alert you to hazards or unsafe practices which could cause bodily injury or property damage.
This symbol will alert you to the possibility of improper use that may result in damage. Read instructions to avoid damage or injury.
Warning
When Installation
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.
-3-
Safety 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.
-4-
Safety instructions
Caution
When Installation 
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.
In-Use 
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.
-5-
Logics
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 antibacteria 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.
-6-
Major specifications on each model 
Model name |
PS-N550WPR |
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Power Supply |
120V~60Hz |
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Measurement(W H D) |
426mm 568mm 271mm |
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Application Space |
45m2 |
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Weight |
12.0kg |
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Color |
Red |
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Design |
Easy design for convenient operation |
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Power usage |
55W(Turbo) |
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Noise |
Turbo(47dB) |
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Wind speed(CMM) |
Turbo(6.4CMM) |
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Negative ion Generation |
Generate 1million super negative ions |
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Inhale system |
side surface inhale system |
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Purifying system |
Three dimension filter system |
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Major Filter System |
Pre-filter - Anti-allergic filter - Washable HEPA Filter - |
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Super Negative ion/ Sterilization |
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Filter composition |
Washable part - Replacement part |
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Remote controller |
Ez remote controller |
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Sensor |
Digital 2 Sensor(dust, smell) |
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Display |
Digital Wide LED display |
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Display Information |
Dust, Smell, Purity level, Fan speed, Filter Checking, Function |
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Selection, Operation Mode, Reservation time |
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Operation Mode |
Speed, Automatic, Yellow Sandstorm, Sleeping |
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Function Selection |
Negative ion, Sterilization |
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Wind Speed |
Turbo-Strong-Soft-Weak |
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-7-
Operations/Functions Manual 
Spare part Name
Mainframe
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
Display and controller
Operation mode indicator
Fan speed indicator
Operation indicator
Dust/Odor indicator
Reflects how well air is moving through the unit.
Filter self-checking indicator 
Check the filter when indicated by the light.
Fan speed button
Operation mode button
ION button
Remote controller receiver
Negative ion/ sterilization indicator
Purity level indicator
Level reflects how well the air purifier is cleaning the air.
Time reservation display
Power On/Off button
Off timer button
-8-
Operations/Functions Manual 
Filter system (include the filter part only)
Filter name |
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Function |
Washing/Replacement cycle |
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Removes large particles |
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This filter has anti-bacteria, anti-mildew, and large particle filtering functions. |
Once a month |
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Anti-bacteria function |
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Pre-filter |
In extreme filtering conditions, these filters may have to be cleaned or |
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Antimildew function |
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replaced more often. |
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Plasma dust-absorb filter |
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Plasma filter |
Filters large particles such as pollen, soot, and mildew. |
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Plasma deodorant filter |
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Absorbs odors and dust. |
Once a month |
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Photo-catalyst anti-bacteria filter |
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Photo- |
Additional odor absorption and large particle filtering. |
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catalyst |
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Photo-catalyst deodorant filter |
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Remove odor particles, VOCs, smoke smell, musty smell, decompose malodor ingredients and chemicals. |
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filter |
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Anti-allergic filter |
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Absorbs and eliminates allergens. |
6~12 months replacement cycle |
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Washable HEPA filter |
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Washable HEPA filter removes pollens, dirt particles, dust and mildew |
Every 6 months |
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from the air. |
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Washable carbon |
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Washable |
Eliminates food, pet and other odors. Removes alkaline, acid and organic |
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Catalyst function |
compound odors. |
Every 6 months |
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deodorization |
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uses jewelry grade platinum and should be disposed of properly |
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. If not completely dried, it may cause the air purifier to malfunction or cause bad odors to be emitted during use. |
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be purchased at an LG service center. |
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Remote Controller
Fan speed button
Set Fan speed
Off timer button
Adjust the timer delay time
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.
Remote Control
Must be aimed at the remote control receiver window on the main unit.
-9-
Operations/Functions Manual 
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.
•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.
-10-
Operations/Functions Manual 
Operation Mode
1
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3 |
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Air Purifying Operation Purify Indoor Air
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.
Speed mode User may manually adjust 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.
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.
Automatic mode Air Purifier will automatically set the most appropriate Fan speed.
Power ON/OFF
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.
-11-
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