Theory of Operation
Wash Quality Routines
Drain and Spin Routines - During the Drain and Spin cycles, the water level is checked continuously.
Normal Drain and Spin will occur until the Pressure Switch senses no water or foam (suds) in the drum.
Foam Detection and Elimination Routine - Excessive foam can make clothes appear dingy and is
usually caused by the use of too much detergent, or the wrong kind of detergent. If the Pressure Switch
senses the presence of foam during the Drain or Spin Routine, the Module Board will stop the main
motor and the basket will stop spinning. The Drain Pump will turn OFF and the drum will fi ll with
water. Once the tub is fi lled, the basket will rest for several minutes in an attempt to eliminate the foam
before resuming the original cycle. This process will repeat until no foam is detected.
Impulse Spin Technology (IST) - During the Spin cycle the drum will rotate at varying speeds before
reaching high spin (instead of a constant pace). This routine optimizes rinse effi ciency and drying
uniformity - clothing comes out with less creasing and wrinkling.
Automatic Balance Routine
Automatic Balance Routine Summary - An unbalanced load can cause excessive noise and vibration.
The Automatic Balance Routine occurs during the distribution ramp (while the basket spin is accelerat-
ing from 40 to 600 rpm). At 600 rpm the motor is decelerated and the rate of deceleration is monitored
by the Module Board. The motor is then ramped up to 600 rpm and shut off . The rate of deceleration
is monitored again and compared to the fi rst deceleration rate. Based on this comparison, the Module
Board can determine whether an unbalanced condition exists or not.
• If the Module Board does not sense an unbalanced condition, the ramp will continue.
• If the Module Board senses an unbalance condition, the Main Motor will rotate slowly back and forth
for the remainder of the cycle.
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