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© 1998 Maytag Corporation
16008373-01 SECTION 1. GENERAL INFORMATION
1-9
The machine control counts the number of
rinses during a normal wash cycle. In the first
and second Rinse Tumble increments, the
machine control will energize the Timer Mo-
tor Output as soon as the Pressure Switch In-
put is no longer energized, indicating that the
water has reached the full level. In the third
and fourth (if Extra Rinse is selected) Rinse
Tumble increments, the machine control will
energize the Timer Motor Output 30 seconds
after the Pressure Switch Input is no longer
asserted.
The machine control will energize the Timer
Motor Output when the timer is set into a
Spin1, Spin2, or Spin3 increment 30 seconds
before the end of the spin. It will remain ener-
gized until the timer inputs change.
TORQUE OUTPUT
The machine control commands motor speed
and direction through the Torque Output from
the machine control to the motor control.
This output is a pulse width modulated (PWM)
signal (See Section 2: Machine Control).
Vcc REFERENCE VOLTAGE OUTPUT
The Vcc Outputs are a reference voltage for
many of the signal outputs. On the machine
control, the Vcc outputs are 24 VDC refer-
enced to the 120 VAC neutral line.
WATER VALVE OUTPUTS
The machine control determines whether the
hot or cold Water Valve Outputs should be en-
ergized during each timer increment, but it
only gates the power to the water valves, it
does not directly provide that power. When
the timer is in an increment calling for water,
power passes from the timer to the wash or
rinse level circuit in the pressure switch. When
the water level is below the full level, the pres-
sure switch circuit is closed and the power
passes to the machine control. The machine
control gates the power to the hot and cold
Water Valve Outputs. When the pressure
switch senses that the full level is reached, the
circuit opens and de-energizes the Pressure
Switch Input on the machine control, which
de-energizes the Water Valve Outputs.
The machine control will read the Water Tem-
perature Sensor Input to determine the
blended water temperature passing through
the water valve. In a warm wash fill, the ma-
chine control will first energize both the hot
and cold Water Valve Outputs for five seconds
then de-energize the cold Water Valve Output
and monitor the water temperature. When
the Water Temperature Sensor Input passes
the warm threshold (approx. 20 K Ohms), the
machine control will re-energize the cold out-
put for the remainder of the fill.
In a cold wash fill, the machine control will
first energize only the cold Water Valve Out-
put for five seconds. It then energizes the hot
Water Valve Output and monitors the Water
Temperature Sensor Input until it passes the
cold threshold (approx. 44 K Ohms), when it
de-energizes the Hot Water Valve Output for
the remainder of the fill.
If the user selects a warm rinse temperature,
the machine control will count the rinses and
allow a warm rinse fill only on the third and
fourth (if the user also selects the Extra Rinse
option) rinses. The first two rinses will be cold
only. The machine control does not regulate
water temperature during the rinses.
NOTE: If the user chooses the Easy Care/
Perm Press fabric selection, all rinse fills will
be cold regardless of whether the user also
selected the warm rinse temperature.