Water Pressure Gauge; Water Flow; Over Fill; Slow Fill - Maytag LAT2300 Service Manual

should have a resistance of between
140 and 160 ohms. For 120 Volt valves
500 - 900 ohms. For convenience, the
analog appliance test meter scale is
marked open and closed to indicate
continuity or an incomplete circuit. If
there is an incomplete circuit, there is a
bad coil. If a coil is bad, the water
valve should be replaced.
Note: On microprocessor models the
water valve solenoid coils are intended
for 24 volts DC operation. DO NOT test
using a motor test cord.
Over Fill
Put machine into a fill, preferably a
warm setting. While the washer is
filling, turn the control to "OFF" or dis-
connect the power cord. If the water
valve does not stop the flow of water,
the valve is at fault. If the water flow of
water stops, the problem is electrical.
Check water level control, micro-
processor board and wiring.
Slow Fill
1. Check screens at faucet for
sediment build-up.
2. Check screens at water valve for
sediment build-up.
3. Check water pressure. The water
pressure should be between 30 p.s.i.
and 120 p.s.i. - dynamic (flow) pres-
sure.
Note: If washer fills (Large setting) in
five minutes or less, water valve is
operating normally.
A flow-pressure tester can be made up
easily using local available fittings and
water pressure gauge.
Water Pressure Gauge
Static pressure: Pressure when valve is
closed.
Dynamic (flow) pressure:: Pressure
when valve is open and water is
flowing.
If this pressure is below 30 p.s.i., water
valve may not operate properly. If pres-
sure is above 80 p.s.i., water line"
hammer" is probable.
Water Flow
The water valve is designed to operate
in pressure range of 30 to 120 p.s.i. If
for example, the water pressure at the
inlet valve is 40 p.s.i., water from inlet
"A" is pushing against diaphragm "C"
at 40 p.s.i. The solenoid plunger "E"
and spring "F" alone are keep the
diaphragm in a closed position,
blocking the flow of water until the
solenoid is energized. To do this, small
bleed holes "0" about the size of a pin,
are put in the diaphragm to allow water
to flow into the plunger area "H". The
water in the plunger area equalized the
pressure on both sides of the
diaphragm. The spring pushes the
pi unger down into the center of the
diaphragm closing center opening, until
the solenoid is energized.
16001145 SECTION 3. WASHER - SERVICE PROCEDURES
3-27
©1994 Maytag Corporation