Temperature Controls With Thermister; Cycles; Options; Dirt Sensor - Electrolux GLDB957JB series Service Manual

TEMPERATURE CONTROLS WITH THERMISTER

The Thermister controls the temperature inside the
dishwasher (Solid State only, depending on what cycle
is selected and what other options are selected).
Functional description are as follows:

CYCLES

•
Pots & Pans - This is a cycle for heavily soiled
dishes. The control automatically selects an
assured water temperature of 135°F in the main
wash cycle and 140°F in the final rinse. This is
when there are no options selected.
•
Normal Wash - This cycle is used for normally
soiled dishes. The control automatically selects an
assured water temperature of 135°F in the main
wash cycle and 140°F in the final rinse. This is
when there are no options selected.
•
China/Crystal - This cycle is used for delicate
china or crystal. The control automatically selects
an assured water temperature of 125°F in the
main wash cycle and 130°F in the final rinse. The
following options are not available for this cycle:
HI-TEMP WASH, HI-TEMP RINSE, SANI RINSE,
or SOIL SENSING OPTIONS.
•
Both Racks - A cycle used for lightly soiled
dishes. The control automatically selects an
assured water temperature of 135°F in the main
wash cycle and 140°F in the final rinse. All options
plus SOIL SENSING are available
•
Upper Rack - A cycle used for small loads of
glassware or cups, etc. The control automatically
selects an assured water temperature of 135°F in
the final rinse cycle. The following options are not
available for this cycle: HI-TEMP WASH, HI-TEMP
RINSE, SANI RINSE, or SOIL SENSING

OPTIONS.

•
Lower Rack - A cycle used for small loads of pans,
silverware, dishes, etc. The control automatically
selects an assured water temperature of 135°F in
the final rinse cycle. The following options are not
available for this cycle: HI-TEMP WASH, HI-TEMP
RINSE, SANI RINSE, or SOIL SENSING
OPTIONS.
•
Rinse & Hold - A cycle for rinsing dishes that will
be washed later. No options can be used except
Delay Start.
•
Controls Locked - The Controls Locked feature
disables the keyboard but does not interfere with any
cycle in progress. The controls may be locked or
unlocked by depressing NO-HEAT DRY / COOL DRY
on the touch pad for 5 seconds when the door is latched.
The Controls Locked LED is illuminated only when the
control is locked.
OPTIONS
•
HI-TEMP WASH - Selects both the wash
temperature delay which is 140°F and the rinse
temperature delay which is 145°F. The maximum
delay time is 10 minutes per delay.
•
HI-TEMP RINSE - Selects only the rinse temperature
delay which is 145°F. The maximum delay time is
10 minutes for this delay.
•
SANI-RINSE - Selects both the wash temperature
delay which is 145°F and the rinse temperature
delay which is 150°F. At the end of the HI-TEMP
RINSE, an additional 10 minutes of rinsing time is
added to ensure sanitation. The heater will be
cycled on and off to maintain the water temperature
at 150°F. The maximum dalay time is 10 minutes for
the wash temperature delay and 20 minutes for the
rinse delay.

DIRT SENSOR

The true name of the sensor is called the Turbidity
Sensor. It is located just in front of the wash impeller on
the sump. The sensor is mounted by two cross point
head mounting screws.There is a locating tab on the
sensor and a knotch on the sump to ensure the sensor
is intalled correctly. The sensor is a device that senses
how dirty the water is. This is done when the customer
loads the dishwasher with dirty dishes, then starts the
unit. The sensor will then sense how dirty the water is.
The DC output voltage of the sensor will be monitored
at the end of the 30 second pause in the first wash and
the first rinse. If a sufficient quantity of soil exists, the
control will add two additional rinses for a total of eight
fills, or 9.6 gallons of water. Should the sensor detect a
light soil condition, the control will subtract two rinses for
a total of four fills, or 4.8 gallons of water. The Normal
cycle can either increase or decrease the time of a wash
cycle. It just depends on how dirty the water is.
To check to see if the sensor is working properly, start
the dishwasher in the Normal cycle, then look for a
sensor light to light up on the control panel. If no light is
illuminated, look at the plug on the sensor to ensure that
it is plugged in. After the dishwasher has completed a
wash and rinse cycle, and has filled up again with clean
water, look to make sure the time clock on the control
panel is counting down. If not, turn the power off to the
dishwasher to make it go into the power failure mode.
Then, press and hold the upper rack and start cancel
pad. If any numbers come on in the display area, this
means the sensor is good. If there is no display of
numbers or just blank, then the sensor is bad.
If there is a leak underneath the sensor, check to see if
the sensor was installed correctly. There is a locking tab
on the sensor which lines up with a notch on the sump.
If the sensor is mounted the opposite way, this can
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