Motorized Door Lock - GE ZEK957 Series Technical Service Manual

Motorized Door Lock

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, and mounting plate.
Access to this assembly, for single and upper
ovens, is behind the control panel. For lower
ovens, access is behind the trim cover between
the 2 ovens.
Motorized Door Lock Operation
The lock motor is energized when the control is
set for Clean and Clean Time selected. The K1
relay contact will close and complete the circuit
that supplies the voltage to the lock motor.
Note: The display of the Control will flash LOCK
DOOR if the door switch is in the C to NC position
(Door open).
The words LOCKED DOOR will flash on and off in
the display while the lock motor is in motion. When
the door is locked the words LOCKED DOOR
remains illuminated in the display.
The cam on the motor performs two functions:
1. Positions the lock hook in the door to prevent
opening during Clean operation.
2. Operates the lock switches that tell the control
if the door is unlocked or locked and ready for
Clean operation.
Note: When door is either being locked or un-
locked, both lock switches will be in the open
position.
LOCK SW. CIRCUIT
Sensor and Lock
Switch Connectors
LOCK SW.#2
8
LOCK
Thermal Switch
SW. #1
6
Door latch output pin -25VDC
at all times measured to ground
5
4
3
Door Unlatched Input Pin
Locked
DOOR LOCKING OR UNLOCKING
LOCK RELAY
L
C MDL
ALL OTHER MODES WITH DOOR CLOSED
LOCK RELAY
L
C MDL
LOCK SW. CIRCUIT
LOCK SW.#2
UnlOCK
Thermal Switch
SW. #1
Unlocked
LOCK
N
DOOR
MOTOR
SWITCH
NO
C
NC
LOCK
N
DOOR
MOTOR
SWITCH
NO
C
NC
Single & Upper Oven
Lower Oven
Motorized
Door Lock
Note: For lower oven, when assembling, attach
the motorized door lock assembly to the trim cover
and assemble as a unit.
Sensor and Lock
Switch Connectors
8
6
Door latch output pin -25VDC
at all times measured to ground
5
4
3 Door Unlatched Input Pin
Unlock Switch
– 26 –
2 Screws
Lock Switch
Cam