Thermistor Testing; Pump Motor Testing - LG DLEX8388WM Training Manual

TRAINING MANUAL
STEAM GENERATOR TROUBLESHOOTING , continued
DLEX8388WM
The sensors operate in a 5 V
environment. When water is present and
conductivity exists from the black GND
lead and the orange low water sense lead,
less than 2.0 V will be measured.
DC
If the water tank was empty, the low water
reading from black to orange would be
(more than) > 3 V
DC.
Sensor Below)
The photo to the left shows the high water
sensor BN wire. As the picture shows the
meter is reading a voltage of 4.52 V
Water in the housing is not touching the
high water probe. When this occurs, the
control board would activate the 9 V
water pump for the steam generator before
energizing the heater, IF steam was
selected, and the control board wanted
steam.
We see the meter displaying <1.5 V
this example the water in the housing is
touching the high water sensor probe and
the ground probe. When this occurs
conductivity through the water is measured
as a voltage drop and the control board
knows the water housing is full of water.
The steam generator heater is ON. The
heater operates on 120 V
watts and 9 amps. The wiring diagram
shows a white wire and a red wire. Red is
L1 and white is neutral. When a steam
cycle is selected the control board will
verify high water level, add water via the 9
V water pump and water reservoir if
DC
needed, and then energize the heater. After
a few minutes, steam is produced.
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DLEX8377WM
DC
(See High Water
DC.
DC
In
DC.
@ 1100
AC
STEAM DRYER