Electrical Testing; Water Level Switch - Microprocessor Models - Maytag LAT2300 Service Manual

ELECTRICAL TESTING
Disconnect unit from power source
before servicing.
With the switch removed, it may be
tested using an appliance test meter by
placing leads on terminals indicated in
the following chart. The switch should
be tested for "Fill" and "Run".
*Set control to "Full" position for testing
by gently blowing into orifice of control
until"click" is heard. Quickly place
finger over end of orifice and make
electrical check.
SETTINGS CHECK TERMINALS
Empty 20-15 closed circuit
(Fill) 20-16 open circuit
Full* (Run) 20-15 open circuit 20-16
closed circuit
If meter does not indicate a closed or
open circuit as shown in the chart,
replace switch.
Water Level Switch -
Microprocessor Models
The pressure switch on this washer is
different from the pressure switch used
on the timer controlled washer. There
are three switches inside the switch
that are actuated by the pressure
created in the air dome and tube as the
water level in the tub increases. The
microprocessor board monitors the
electrical circuits created by these
switches to control the water level in
the tub.
The following is a brief overview of esti-
mating a total program time including
fill times and how certain fill levels are
reached.
The total time remaining displayed
during a given program is estimated
based on the current water level
selection and the average time of filling
for the previous two fills. If a fill level is
reached quicker than expected, the dis-
played time will skip forward. If the fill
level is not reached in the estimated
time, the display will discontinue to
decrement until it has been reached. If
a slow fill situation caused the esti-
mated time remaining to be 99 minutes
or more, the display will time down and
be recalculated at the next cycle mile-
stone.
The washer will include five water
levels available, the first, third, and fifth
of which will be directly controlled via
the pressure switch. The second level
will be reached by time filling based on
the fill rate seen between empty and the
first (lowest) level after the fist level has
been reached. The fourth level will be
reached by time filling based on the fill
rate seen between empty and the first
(lowest) level after the third level has
been reached. The lowest water level
will always have a slow agitation to
prevent damage to the clothes.
Five WASH temperatures are provided.
The first (cold), and fifth (hot) are
obtained by turning the cold and hot
valves on only. The second (energy
warm), third (warm) and fourth
(energy-hot) are obtained by the
sensing of the inlet water temperatures,
and adjusting the proportion of time the
respective valves are turned on to
obtain the desired temperature in the
wash tub.
16001145
SECTION 3. WASHER - SERVICE PROCEDURES
3-7
©1994 Maytag Corporation