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CFMV156DBD
CFMV156DSD
CFMV156DCE
DOOR OPEN MECHANISM
The door is opened by pulling the door handle, refer to the
Figure D-.
Latch Heads
Door
S witch Lever
Figure D-1. Door Open Mechanism
DOOR SENSING SWITCH, PRIMARY INTERLOCK
SWITCH AND THIRD DOOR SWITCH
The primary 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 and the third door switch 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 con-
sists of the door sensing switch and primary interlock 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 C/T fuse when the contacts of the secondary
interlock relay (RY2) and primary interlock switch and third
door switch fail to open when the door is opened.
Functions:
. When the door is opened, the monitor switch contact
close (to the ON condition) due to their being normally
closed. At this time the secondary interlock relay (RY2),
primary interlock switch and third door switch are in the
OFF condition (contacts open) due to their being normally
open contact switches. And the contacts of relay (RY)
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 primary interlock switch and third door
switch contacts close. (On opening the door, each of
these switches operate inversely.)
3. If the door is opened, and the secondary interlock relay
(RY2) and primary interlock switch and third door contacts
fail to open, the C/T fuse blows simultaneously with
DESCRIPTION AND FUNCTION OF COMPONENTS
Door Sensing
Switch
Monitor Switch
Third Door
Switch
Primary
Switch
closing of the monitor switch contacts.
CAUTION: BEFORE REPLACING A BLOWN C/T FUSE
TEST THE DOOR SENSING SWITCH, SEC-
ONDARY INTERLOCK RELAY (RY2), PRIMARY
INTERLOCK SWITCH, THIRD DOOR SWITCH
AND MONITOR SWITCH FOR PROPER
OPERATION. (REFER TO CHAPTER "TEST
PROCEDURE").
NOTE: C/T FUSE, MONITOR SWITCH AND PRIMARY
INTERLOCK SWITCH ARE REPLACED AS AN
ASSEMBLY
THERMAL CUT-OUT (HOOD )
This thermal cut-out located on the right base plate. It
is designed to automatically turn on the hood fan motor
whenever the hot air rising from the conventional range
below causes the temperature at the thermal cut-out to rise
to 40
F (60
C) or higher, thus removing this hot air from
O
O
around microwave oven. When the temperature around the
thermal cut-out drops to 3
cut-out shuts off the hood fan motor.
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 293
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 turnta-
ble 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 sur-
rounding the magnetron and cools the magnetron. This air
is channelled 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.
HOOD FAN MOTOR
The hood fan motor is a two-speed, single-phase, double
pole induction type, requiring a hood fan capacitor. It is
located outside the upper rear part of the oven cavity, is
to remove, from around the oven, hot air rising from the
conventional electric or gas range over which it is installed.
This air is then expelled either vertically or horizontally
through the customer supplied duct system, or discharged
HOOD LAMP
The hood lamps are mounted at the hood lamp angle on
the base cover. The hood lamps can be turned off and on by
touching the WORK LIGHT pad or the NIGHT LIGHT pad. And
also the brightness can be varied to high or low by touching
the WORK LIGHT pad or the NIGHT LIGHT pad.
4
F (45
C) or lower, the thermal
O
O
F (45
O
C)
O
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