Drying Time; Electrical Operation (Gas Dryers Models); Electronic Control Board Circuits - Electrolux 6000 Service Manual

The high limit thermostat is a safety device that prevents
the dryer from overheating if the contacts of the RL 2 fail
closed. The contacts of the high limit thermostat,
normally closed and are set to open at a temperature
above the preset temperature specifications of the
electronic control board. From the output terminal of the
high limit thermostat, line 1 is connected to one side of
the element and to pin 3 of the eight pin plug. The other
side of the heating element is connected to line 2 through
the contacts of the second centrifugal switch in the drive
motor. This switch prevents power from being applied to
the element if the motor is not running. The connection
to pin 3 allows the control to monitor the contacts of the
high limit thermostat. An error code will show if contacts
open above a preset number of times in a cycle.

Drying Time:

The amount of drying time is determined in one of two
ways: 1) A fixed amount of drying time may be set by
turning the SELECTOR knob to one of the fixed drying
times. 2) The AUTO DRY cycles a variable amount of
time by the size of the load, the amount of moisture in
the clothes and the dryness setting selected.
In the AUTO DRY cycles, the electronic control reads
the capacitance between the two sensor bars located in
the vent cover.
When wet clothes are placed in the dryer, the clothes
touch the sensor bars and the moisture lowers the
capacitance between the bars. As the dryer runs,
moisture is removed from the clothes and capacitance
between the bars increases. When the increase in
capacitance satisfies the electronic control, the cycle
status will change from "Auto Dry" to "Cool Down" and
the load is tumbled without heat. At the end of cycle,
the electronic control will turn the dryer off and the end of
cycle signal will sound.

Electrical Operation (Gas Dryers Models)

Note:
Always refer to the wiring diagram or schematic
with the product.
Sample wiring diagram.
When the dryer is connected to electrical power, line 1
is connected to pin (1) of the eight pin plug of the control
board, the terminal marked COM on the door switch and
the COM terminal of the heater relay that is mounted on
the electronic control board. Pin 1 of the eight pin plug
provides power to the electronic control board. The
electronic control board controls the operating
temperature of the dryer and length of the cycle by either
sensing the amount of moisture in the clothes or a fixed
amount of time when time dry is used.
Note: For information on programming the
electronic control and the cycles, refer to
section A.

Electronic Control Board Circuits:

Line 1 is applied to the control board at pin (1) of the
eight pin plug and neutral is connected on pin 2 of the
eight pin plug. The control board receives inputs from
the selector knob and push buttons which program the
control, the contact sensors that senses the amount of
moisture in the clothes and the control thermistor which
senses the temperature in the dryer. The control board
use these inputs to signal the interface board, control
the drive motor circuit by opening and closing the contacts
of relay RL 1 and the heater circuit by opening and closing
the contracts of relay RL 2.
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