Service manual

ManualsBrandsALLIANCE ManualsHousehold AppliancesSWF561*E

8 800168

Section 2 Introduction

General

This frontload washer provides some of the same

principles of operation as the typical topload washer. It

senses water level, dispenses the desired laundry

detergent, agitates the clothes for good cleaning

action, pumps the water out of the washer and spins

the clothing in preparation for the dryer.

The difference in operation is primarily the rotational

washing agitation created for the horizontal basket and

drum. This agitation tumbles the clothes in a

clockwise, pause, and counter-clockwise direction.

This reversing tumbling action provides an efficient

washing process and requires less laundry detergent

and less water.

The cycle begins by locking the loading door after the

vend is satisfied. The type of cycle and water

temperature are determined by the appropriate pads on

the electronic control.

The inner basket starts agitating during the wash water

fill. A column of air is trapped in a pressure bulb and

hose. The air pressure continues to increase as the

inner basket fills with water until it is great enough to

activate the pressure switch which then causes the

wash fill to stop.

The agitate cycle tumbles the clothing in a clockwise

direction for a period of 20 seconds, pauses for 9

seconds and then tumbles the clothing in a

counterclockwise direction for 10 seconds. This

agitation continues until the wash soak cycle. The

machine stops agitating and turns on the pump which

removes the wash water.

Upon completion of the wash cycle, the machine goes

into a rinse cycle. Fresh cold water is brought into the

inner basket via the mixing valve until the pressure

switch shuts off the water while agitating. The rinse

cycle consists of agitation for a predetermined amount

of time and then a spin mode with the pump running

where the machine goes into a series of 4 short 500

RPM spins. Two of these rinse cycles will normally

take place. A third extra rinse cycle is optional.

After all the rinse cycles have been completed, the

washer goes into a final high spin cycle to extract as

much water as possible from the clothing to prepare

them for the dryer. The spin speeds and duration of

this final high spin cycle are determined by the type of

wash cycle selected (refer to table).

NOTE: Washer may not reach 1000 RPM because

of an out-of-balance condition. Control may limit

speed to 850, 650 or 500 RPM depending on severity

of out-of-balance condition.

Technical

The basic operational system of this washer consists of

the electronic front-end control, the motor control,

pressure switch, water valves, electric pump, D.C.

motor and transformer.

The front end control performs all control and timing

functions like the timer in a topload washer. The front

end control sends simple speed and output commands

to the motor control via serial communication. The

front end control powers the door lock, pump and the

motor control.

The motor control powers the D.C. motor and

performs all motor control functions. The motor

control also powers the water and dispenser valves and

passes the pressure switch status to the front end

control. The motor control is powered through the

door switch, door lock switch and front end control.

An auto transformer provides 240 VAC for the motor

which the motor control converts to D.C. The motor

control also alerts the front end control to any errors in

the motor.

The motor control uses a speed sensor on the motor to

measure the drum RPM. Before entering any spin step

the motor control measures the RPM of the drum to

sense out-of-balance. The motor control will try to

redistribute the clothes if an out-of-balance condition

exists. The motor control will limit the spin speed to

several speeds depending on the severity of the out-of-

balance condition. If the out-of-balance condition is

severe enough, the motor control will limit speed to 90

RPM and will not spin.

NOTE: An additional out-of-balance switch is used

to detect any out-of-balance condition during spins.

If this switch opens during a spin step the motor

control immediately stops and restarts the spin step.

Regular Perm Press Delicate

650

RPM

5-1/2

minutes

1000

RPM

1-1/2

minutes

minute

minutes