Oreck 447628, 447880 User Manual

SIMPLY AMAZING

Service Manual

Table Top Air Cleaner

Super Air 5 / Air 6

REV I., Please disregard all earlier versions.

Model 447628 & 4478801

Important Safeguards

When using electrical appliances consideration should be given to basic safety precautions including:

1. Read all instructions.

2. Do not immerse appliance, cord or plug in water or other liquid and take care to ensure that the control panel is kept clean and dry.

3. Do not use the appliance if there is any visible damage to the appliance or to the supply cord.

4. Close supervision is necessary when any appliance is used by or near children.

5. Do not let the cord hang over the edge of the table or worktop or touch hot surfaces.

6. Do not use the appliance outdoors.

7. Do not use the appliance for other than its intended use. WARNING: DO NOT USE THIS ELECTRONIC AIR CLEANER WHEN OXYGEN IS

8. BEING USED OR WHEN COMBUSTIBLE GASES ARE PRESENT. HIGH VOLTAGE SPARKS CAN CAUSE IGNITION AND SUBSEQUENT PERSONAL INJURY OR PROPERTY DAMAGE.

NOTE: Care should be taken to avoid touching the sharp ionizer needle situated above

9. the fan. Always disconnect the unit from power prior to cleaning or servicing.

General Knowledge Warning - The intent of this manual is to provide general

guidance to be used by a qualified service technician in servicing the Oreck tabletop electrostatic air cleaner. The technician should have a good understanding relative to working with electrical and mechanical equipment. A knowledge base to include basic electronics, basics of motors and general mechanical knowledge is required to service this equipment. Attempting to service the equipment without the above background could result in electric shock, personal injury or property damage. Do not attempt to service equipment unless properly qualified.

Rotating Element Warning - Unit has a rotating blower wheel and cooling fan to

circulate air and keep the unit cool. When servicing the unit and repairing the unit always insure that you keep objects and internal electrical wiring away from the rotating elements. Failure to allow for proper clearance for rotating members can cause electric shock, personal injury or property damage.

Tools Required

Multimeter Fluke Model 8024-B High Voltage Probe Fluke Model 80K-40 #2 Flat Blade Screwdriver #2 Phillips Drive Screwdriver Diagonal Wire Cutters Wire nuts Needlenose Pliers

Table of Contents

General Description and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3

Periodic Maintenance and Tune-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4

Trouble Shooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 5

Parts Removal and Replacement Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 15

Cross Section and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 25

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 26

General Description and Operation

Airborne particles and odors are removed from

air passing through the unit by the process of

electrostatic precipitation and the revolutionary

post filter which combines antimicrobial

treatment and activated charcoal.

The air around you is filled with thousands of particles of air

pollution. Some of the pollutants - dust, pollen and lint are visible to the naked eye, but most of

the pollutants - smoke and bacteria, to name a few, are microscopic in size.

Polluted air enters the unit through the front of the air cleaner. The fan pulls in dirty air and the

pre-filter traps large particles (hair, lint, etc.). The smaller particles (dust, smoke, pollen) in the

dirty air receive a positive electrical charge as they pass through the ionizing section. The

positive charged particles then enter the collecting section which uses a series of alternately

charged aluminum plates to attract and retain the particles. It works like a powerful magnet

and the particles remain there through natural adhesion until removed by the washing process.

The air then passes through the post filter that helps control microorganisms and remove

household odors. Next, the negative ion generator freshens stale air. Finally, clean air passes

back into the room through the top grille.

Periodic Maintenance Tune-Up

1. Remove collecting cell and pre/post filters.

2. Wipe down inside of unit with damp cloth.

3. Thoroughly Clean Collecting Cell with Oreck Assail-A-Cell Cleaner.

4. Check for any broken wires in the collecting cell, and ensure wires are securely seated in the plastic spacer at the center of the cell. Check for any bent plates in collecting cell. Replace if damaged.

wires

plastic spacer

plates

5. Thoroughly Clean pre-filter with warm soapy water.

6. Clean negative ion generator tip with a alcohol and a cotton swab.

7. Clean the dirt and grime from the motor shaft using a soft cloth.

8. Squirt a few drops of machine oil (“3 in 1” type oil, not

WD-40 type oil) in the slot on the

shaft to lubricate the bearing.

9. Check to ensure blower wheel rotates freely.

10. Check to ensure rubber grommet on motor shaft is not worn or loose. Replace if necessary.

11. Check the bearing in the bearing wall (opposite end of motor) on other end of blower wheel for excessive wear or damage. Replace if necessary.

12. Re-install collecting cell and pre-filter.

13. Install New Post Filter (Activated Charcoal Filter).

Troubleshooting Guide

Warning: The troubleshooting portion of this manual requires that the unit power be “ON” for much of the servicing portion of troubleshooting. When working on the unit under power, use all of the standard precautions in working with any electro-mechanical device that contains line voltage, high voltage, and rotating elements. Failure to follow standard safety procedures can cause electrical shock, personal injury or property damage.

Initially:

1. Plug the unit into a proper outlet.

2. Check the unit on all speeds to see if the blower and motor are operating properly. The power supply light should not operate on the “fan” selection mode.

Problem Being Checked:

1. If the motor and blower do not operate

a. Check the top for proper positioning. The top must fit tightly on the unit.

Remove the top. Depress the interlock switch with a plastic handle screwdriver to test operation. If the motor and blower operate, then the problem is that the interlock switch is not gettting engaged when the top is on. Reinstall the top and ensure tight fit so activator post can engage the interlock switch.

b. With the top removed, depress the interlock switch with a plastic handle screwdriver to

test operation.

c. If the motor and blower operate, then the problem is that the interlock switch is not

engaged when the top is on.

d. Check the top to see if there is a broken activator post. e. Check the top to determine if it is warped. If the top appears to be warped, try

a new top.

Activator Post

Interlock Switch

Turn the top over and examine it for a broken activator post. Lay the top on a smooth surface. Check it for warpage that could keep the interlock switch from being engaged.

f. Check the interlock switch (item 3 of the parts diagram).

Troubleshooting Guide

How to Remove the Power Supply Cover

1. Insert flathead screwdriver into slot on the interior edge of the power supply cover, and push plastic clip away from contact wall so that the cover can be lifted up.

Gently pry the plastic clip away from contact wall to release the cover.

2. The switch wires will limit the movement of the power supply cover.

3. Is the switch actuator broken?

If the actuator is broken, replace the switch.

4. Is the switch properly seated in the bracket, or is the bracket broken or distorted? The switch is held in position by a bracket that allows the switch to be snapped between two locator ribs on the bracket.

If the switch is out of position, straighten and secure it. If the bracket is broken or distorted, replace the motor bracket.

5. Are the wires connected to the switch?

Check both wires on the interlock switch to ensure that they are connected and tight.

Troubleshooting Guide

6. Check the voltage to and from the switch when activated. You should be able to measure line voltage entering and leaving the switch when activated.

TO SWITCH, If voltage is

LINE SIDE

LOAD SIDE

7. Check the switch plate cover. The plate must sit squarely on the bearing wall and the cabinet base.

present on line side of the switch but not present on load side, the switch is bad. FROM SWITCH, If there is no voltage on line side of the switch, check the wall outlet. If there is voltage at the outlet, then the line cord is bad.

If the switch plate cover is not secure, it will prevent the top from engaging the interlock switch. Insure that the cover is in position.

2. If the motor operates but the green “cleaning air” light does not operate:

a. Remove the cell and check to see if the “cleaning air” light comes on.

CLEANING

AIR LIGHT

b. If the light operates with the cell removed, check the cell for broken wires that

could cause a dead short. Check to see if the cell plates are bent or touching. Check to see if there is a foreign object in the cell. Check for carbon paths or tracks on the cell ends.

If the cell has loose or broken wires or bent plates, replace the cell. If there are no loose or broken wires present, hold the cell up to the light and look for metal shavings or anything that may be causing a short. If nothing is apparent, clear and retest the cell. If the problem persists, replace the cell. If carbon tracking is present on cell ends, replace the cell.

Troubleshooting Guide

c. If the light does not operate with the cell removed, check the wires to the

light and confirm that they are properly connected. Check the voltage from the light terminals on the power supply board. Set meter to appropriate scale. You should have about 16 volts DC.

d. Option 1: Check the output of the power supply by using the recommended H.V.

probe and a multimeter. The unit must be "ON" with the operating switch in the "Max Clean" position and the interlock switch must be depressed. The voltage should measure from -5.5 KVDC to -7.0 KVDC. An alternate method to check voltage is by using a plastic handled screwdriver to short the high voltage contacts and observe a spark.

If the wire has voltage, the light is bad and needs to be replaced. If the wire does not have voltage, go to next step.

If the voltage is not present, check the transformer output. If the voltage is present and not within range, replace the power supply board and check the transformer output. If the voltage is present and within range, the power supply is operating properly.

Option 2: Using a plastic handle screwdriver, short the high voltage contacts

and observe a spark.

Short the HV contacts to observe a spark.

Troubleshooting Guide

e. Check the input voltage to the transformer using a standard lead and a multimeter.

Check the voltage from the black lead on the terminal L speed control switch and white lead on power supply board labeled line neutral. Activate the interlock switch. The meter should indicate line voltage. Check the voltage on the two yellow wires on the power supply board from the transformer. The interlock switch must be activated. The meter must indicate 24 vac.

BLACK LEAD

YELLOW WIRES

WHITE LEAD

If there is no power to the transformer, recheck section 1, the interlock switch. If there is power to the transformer, but no output voltage, replace the transformer and power supply board assembly.

3. If the green “cleaning air” light operates and the blower wheel does not turn.

a. Remove the top and check to see if the stripper is in place.

The stripper is held in position by slots in the contact wall and bearing plate and alignment tabs on the stripper plate. If the stripper is not in position, reposition the plate by placing tabs into the slots.

b. Use your hand to try to spin the blower wheel.

If the wheel does not spin freely, check for anything that may be blocking the movement of the wheel and remove the blockage. If no blockage is apparent, see 3c and 3d

c. Turn the unit over and check for signs of distortion in the cabinet bottom beneath the

motor that might prevent the blower from spinning.

If the cabinet bottom is distorted, replace the unit.

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