To Check Water Level Control; Checking The Water Level Switch - Maytag LAT2300 Service Manual

To Check Water Level Control:
1. Unplug washer power cord from
power supply.
2. Check for continuity as follows:
• Empty - should show continuity 1-3
and 4-5.
• Small - should show continuity 4-5
only.
• Medium - should show continuity
1-2 and 4-5.
• Large - should show continuity 1-2,
1-3 and 4-5.
• Overflow - will show no continuity
4-5.
board responds to the electrical circuits
in the water level switch to determine
how long the solenoids(s) should be
energized.
There are five available water temper-
atures, cold, energy saver warm, warm,
energy saver hot and hot. Cold is
achieved by energizing the cold
solenoid on the water valve. Warm is
achieved by energizing both the cold
and hot solenoids on the water valve.
Hot is achieved by energizing the hot
solenoid on the water valve. Energy
saver warm is achieved by starting with
warm, both cold and hot solenoids
energized, and the hot solenoid is then
cycled on and off every 30 seconds.
Energy saver hot is achieved by starting
with warm, both cold and hot solenoids
energized, and the cold solenoid is then
cycled on and off every 30 seconds .
.,
5 Water
Levels
. .
p
f - - -
- - - . - - - - - -
I}Time Fill
Fill
--- ---
F~l~-~
--
Time
Fill
-=
b
Fill
"-
A
T U B
High (5)
Med High 14)
Med (31
Med Low 121
Low (11
CAUTION - - - - - - - - - - - ,
This is a 120 VAC water valve and
voltage will be present at water
valve whenever the washer is con-
nected to the power supply (except
when the contact between 31 and 32
is broken on the water level switch).
Checking the water level switch:
CAUTION - - - - - - - - - - - - ,
Power from L1 is supplied to the three
switches in the water level switch and
to the water valve (see schematic). The
microprocessor board acts like a switch
by controlling the neutral side of the
power supply going to the hot and cold
solenoids on the water valve (neutral
goes to the microprocessor board via
pi n 3 on edgeboard connector SS and
back to the water valve via pin 5 and
pin 1). To achieve the proper water
level in the tub, the microprocessor
Always disconnect power supply
before making continuity checks or
taking resistance readings.
1. Disconnect washer from power
supply.
2. Continuity checks can be made
across the three internal switches.
Refer to legend on the schematic to
determine condition of the switches
16001145
SECTION 3. WASHER - SERVICE PROCEDURES
3-8
©1994 Maytag Corporation