Electrolux E30MO75HSS Technical & Service Manual page 22

Operation
Damper Operation
1. When power supply cord is plugged in:
A. When power supply cord is plugged in, a signal is
sensed in the control unit, and operates shut-off
relay (RY4).
B. Contacts of shut-off relay (RY4) close, the
damper motor is energized, opening the damper
door.
C. When the damper is moved to the open position
by the damper cam the damper switch is
closed (ON position).
D. The signal from damper switch is re-sensed in
the control unit and shut-off relay (RY4) is turned
off.
E. The 120 volts A.C. to the damper motor is re
moved and the motor turns off.
2. When oven is microwave cooking:
Damper is in the open position.
3. When oven is convection cooking:
A. Damper motor is energized by touching the
convection, temperature and START pads.
B. When damper is in the closed position (damper
switch is OFF), its signal is sensed by the control
unit, and shut-off relay (RY4) is de-energized.
C. The damper is held in the closed position during
the convection cooking operation.
D. At the end of the convection cooking, shut-off
relay (RY4) is energized, and the damper is
returned to the open position.
If the damper door is not in the proper position,
closed during convection or open during microwave,
the control unit will stop oven operation after 1 minute.
DAMPER SHAFT
Figure 2-7. Damper Assembly
2-10
DAMPER DUCT
DAMPER
DAMPER CAM
DAMPER SWITCH
DAMPER MOTOR