Electrolux EI30BM55HB - 30" Microwave Oven, Техническое и сервисное руководство

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Operation
2-6
DOOR OPEN MECHANISM
The door is opened by pulling the door handle, refer
to the Figure D-1.
DOOR SENSING SWITCH, SECONDARY INTER-
LOCK SWITCH
The secondary interlock switch is mounted in the
lower position of the latch hook, the door sensing
switch in the primary interlock system is mounted in
the upper position of the latch hook is mounted on
upper position of the latch hook. They are activated by
the latch heads on the door. When the door is
opened, the switches interrupt the circuit to all
components. A cook cycle cannot take place until the
door is firmly closed thereby activating both
interlock switches. The primary interlock system
consists of the door sensing switch and primary inter-
lock relay located on the control circuit board.
MONITOR SWITCH
The monitor switch is activated (the contacts opened)
by the latch head on the door while the door is
closed. The switch is intended to render the oven
inoperative, by means of blowing the monitor fuse,
when the contacts of the primary interlock relay (RY2)
and secondary interlock switch fail to open when the
door is opened.
Functions:
1. When the door is opened, the monitor switch
contact close (to the ON condition) due to their
being normally closed. At this time the primary
interlock relay (RY2), secondary interlock switch
are in the OFF condition (contacts open) due to
their being normally open contact switches. And
the contacts of relay (RY1) are in the ON
condition (contacts close).
2. As the door goes to a closed position, the
monitor switch contacts are first opened and
then the door sensing switch and the secondary
interlock switch contacts close. (On opening the
door, each of these switches operate inversely.)
3. If the door is opened, and the primary interlock
relay (RY2) and secondary interlock switch
contacts fail to open, the monitor fuse blows
simultaneously with closing of the monitor switch
contacts.
CAUTION: Before replacing a blown monitor fuse,
test the door sensing, primary interlock relay (RY2),
Relay (RY1), secondary interlock switch and monitor
switch for proper operation.
NOTE: Monitor fuse and switch are replaced as an
assembly
THERMAL CUT-OUT (CAVITY)
This thermal cut-out is located on the top of the oven
cavity. It is designed to prevent damage to the oven
unit if the food in the oven catches fire due to
overheating produced by improper setting of cooking
time or failure of control unit. Under normal
operation, the thermal cut-out remains closed.
However, the thermal cut-out will open at 293F (145C)
causing the oven to shut down.
TURNTABLE MOTOR
The turntable motor rotates the turntable located on
the bottom of the oven cavity, so that the foods on the
turntable cook evenly during cooking. Turntable will
turn in either direction. The turntable motor can
be turned off by touching TURNTABLE ON/OFF pad.
COOLING FAN MOTOR
The cooling fan motor drives a blade which draws
external cool air. This cool air is directed through the
air vanes surrounding the magnetron and cools the
magnetron. This air is channeled through the oven
cavity to remove steam and vapors given off from the
heating foods. It is then exhausted through the
exhausting air vents at the oven cavity.
Secondary
Interlock
Switch
Monitor
Switch
Latch
Hook
Door
Latch
Heads
Door
Sensing
Switch
Figure D-1. Door Open Mechanism
Component Descriptions