Lock Assembly - Monogram ZET1PL1SS Technical Service Manual

To remove the power supply:
Disconnect the wire harnesses from the power
supply board at locations J13, U12, and the ground
wire from U15.
To remove the relay board:
1. Disconnect the 5 wire harnesses from the relay
board at locations J1-J2-J3-J4, J7-J6-J5-J10, J8,
J9, and J12.
2. Disconnect the red and orange wires from relay
K3, and the black wires from relay K17.
3. Mark the location of the jumper wires located on
relays K16, K17, and K18. Remove the jumper
wires.
The boards are held in place
by compression tabs.
The motorized door lock assembly is located above
the oven. The assembly consists of a lock motor,
cam and switch assembly, lock hook, heat barrier,
mounting plate, and oven door switch.
The lock motor is energized when the control is set
for Clean and Clean Time selected. The K9 relay
contact will close and complete the circuit that
supplies the voltage to the lock motor.
Power Supply Board
The lock motor has approximate resistance value of
1.9K Ω.
Note:
•
Relay Board
•
•
The cam on the motor performs two functions:
1.
2.
Note: When door is either being locked or unlocked,
both the lock and unlock switches will be in the open
position. The LOCKED AND UNLOCKED diagrams are
representative of a single/upper oven but apply the
same to a lower oven.
– 33 –

Lock Assembly

Door Locking/Unlocking Strip Circuit
LOCK RELAY
L
C MDL
To enable proper operation of the door lock,
ensure that the door jamb switch is in "common"
to "normally open" (door closed). This enables
power to be delivered when the door lock closes.
Display of Control will fl ash "LOCKED" if the door
switch is in the "C" (common) to "NC" (normally
closed) position (door open).
The word "LOCKED" will fl ash on and off in the
display while the lock motor is in motion. When
the door is locked, the word "LOCKED" remains
illuminated in the display.
Positions the lock hook in the door to prevent
opening during Clean operation.
Operates the lock switches, which tell the control
if the door is unlocked or locked and ready for
Clean operation.
N
LOCK
MOTOR
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