GE J2S968 Instructions page 3

OVEN SENSOR AND DOOR LOCK SWITCH
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 and mounting plate.
MOTORIZED DOOR LOCK OPERATION
The lock motor is energized when the control is set for Clean and Clean Time is
selected. The K4 Relay contacts will close and complete the circuit that supplies the
voltage to the lock motor.
NOTE: Control display will flash "LOCK DOOR" if the door switch is in the "C" to "NC"
position (door open).
• The words "LOCK 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" remain illuminated in
the display.
• CAM – 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 which tell the control if the door is unlocked or locked
and ready for Clean operation.
UNLOCKED
UNLOCKED UNLOCKED
LOCK SW. CIRCUIT
SENSOR AND LOCK
SWITCH CONNECTORS
UNLOCK SW.
LOCK SW. #1
N.O. CONTACT
8
CLOSED
LOCK
SW. #2 THERMAL SWITCH 6
5 DOOR LATCH OUTPUT PIN 5, -25V DC
CAM IN
4 DOOR LATCHED INPUT PIN
UNLOCK POSITION
3 DOOR UNLATCHED INPUT PIN LOCKED
LOCKED UNLOCK SW.
LOCKED
N.O. CONTACT
OPEN NOTE: When door is
LOCK SW. CIRCUIT SENSOR AND LOCK CAM IN
LOCK POSITION
SWITCH CONNECTORS
LOCK SW. #2
either being locked or
8
unlocked, both lock
LOCK SW.
N.O. CONTACT
LOCK switches will be in the
SW. #1 THERMAL SWITCH 6 CLOSED
5 DOOR LATCH OUTPUT PIN 5, -25V DC
open position.
4 DOOR LATCHED INPUT PIN
3 DOOR UNLATCHED INPUT PIN
SPECIAL FUNCTIONS
The control has a section that can be entered to change how the control will work.
To enter this section:
Press and hold BAKE and BROIL pads for 2 (two) seconds and "SF" appears in the
display. Select the area to change. When the change has been made, press START
to return to Time of Day.
• End-of-Cycle Tone – Press TIMER pad. Display shows "Con Beep" when control is
set for continuous End-of-Cycle Tone or "Beep" when set for noncontinuous.
• °F or °C – Press BROIL pad. Display will show either "F°" or "C°." Press BROIL pad
again to change.
• 12-Hour, 24-Hour or blank out Time-of-Day Clock – Press CLOCK pad. Display will
show "12 hr," "24 hr," "OFF" for blank clock. Press again to change.
• 12-Hour Shutdown comes set to shut down after 12 hours of continuous operation;
this can be eliminated—press DELAY START pad. Display will show "No Shdn."
To turn back on, press DELAY START pad again and display will show "12 Shdn."
• Sales Mode (special feature for sales floor demonstration) – Press CLOCK and TIMER
pads at the same time. Display will start to cycle through the different modes of operation.
• Sabbath Mode – This feature disables all but Bake and Timed Bake, overrides 12-Hour
Shutdown, disables beeps and puts symbols in the display during Bake. Access by
pressing DELAY START pad until display shows "SabbAtH." Exit by pressing DELAY
START until "No Shdn" or "12 Shdn" shows.
CLEAN THERMAL SWITCH
The thermal switch is located on the floor of the component compartment in
front of the fan motor. The thermal switch is wired in series with the lock motor
switches. The limit switch opens at 240°F and closes when temperatures cool below
190°F. If the thermal switch opens during:
1. Oven Temperature Below 600°F, program is cancelled when thermal switch
opens. Lock motor will run and the words "LOCK" and "DOOR" will be flashing
in the display.
2. Oven Temperature Above 600°F, any mode of operation control will go to
-F2- failure code. When this condition exists, check the fan operation (look for
obstructions), inspect oven installation (make sure grille areas are not blocked),
oven insulation and lock circuit.
BAKE THERMAL SWITCH
The bake thermal switch is wired in series with the lock motor switches. The limit
switch opens at 169°F and closes at 140°F. If the thermal switch opens during Bake,
the program is cancelled and the lock motor will run. The words "LOCK DOOR" will
flash in the display.
OVEN CALIBRATION
Testing has shown that this oven has the best cooking performance at a control setting
of 350°F when the AVERAGE center oven temperature is between 340°F and 380°F.
Customers may change the average center oven temperature by + 35°F to satisfy their
own cooking needs.
To change:
• Press and hold BAKE and BROIL pads until "SF" appears in display.
• Press BAKE pad to enter oven calibration mode. "00" appears if oven calibration
has not been changed previously. If oven calibration has been changed previously,
a temperature between + 35°F will be displayed.
229C4059P465
• Press increase or decrease pads to change average oven temperature.
• Press START pad to return to Time of Day.
ERC FAILURE CODES
The oven may stop operating but not give an F code on the display immediately. F codes are stored
in nonvolatile eeprom memory until the same fault occurs twice consecutively. After that, the F code
will be displayed. F codes can be recalled by pressing together TIMER, CLOCK, MIN DOWN or 9.
While F codes are displayed, pressing MIN UP or 8 and HR DOWN or 6 together will clear them.
A fault must exist continuously for 5 minutes before an F code is recorded (F2 and F8 are sooner).
FAILURE
CODE MEANING CORRECTION
Determine if problem is with key panel or control by
-F0- Shorted OFF key
disconnecting ribbon cable and measuring flat cable pins
13 to 14. Should be open. Should be 100–150 ohms while
pressing OFF key.
-F2- • Welded relay contacts
Over temperature
• Cooling fan stalled or blocked
1. Inside oven cavity as measured by
• Airflow to rear of unit
sensor over 650°F unlatched or
• High resistance in oven sensor leads/connectors
915°F latched or
(especially at sensor in rear)
2. Cooling fan stalls while oven above
650°F—open thermal switch in
yellow leads
-F3- Open oven sensor (under 950 • Disconnect power. Disconnect sensor harness from
ohms) control. Measure sensor resistance (white leads) to be
LOCK SW.
N.O. CONTACT ~1080 ohms at room temperature with 2 ohms per
OPEN
degree change.
• Look for damaged harness terminals if not a bad sensor.
-F4- Shorted oven sensor (over • Disconnect power. Disconnect sensor harness from
2900 ohms) control. Measure sensor resistance (white leads) to be
~1080 ohms at room temperature with 2 ohms per
degree change.
• Separate sensor from harness to determine fault.
-F7- Shorted matrix or START Determine if problem is with key panel or control by
key disconnecting ribbon cable and measuring flat cable using
pinout chart. Allow up to 1000 ohms when pressing a key.
-F8- EEPROM data shift failure If repeated, replace control.
-F9- Cooling fan stalls while above Cooling fan or airflow to control area.
650°F; open thermal switch in
yellow leads
-FF- Loss of latch motor safety circuit Replace control.
SELF-CLEAN & MOTORIZED DOOR LOCK
OPERATION LOCK CIRCUITS
There are two circuits controlling the locking and unlocking of the door. These are the
lock motor circuit and the lock switch circuit. The lock motor circuit applies voltage
(120 VAC) to the lock motor. This circuit is from L, through the door switch, lock relay,
lock motor to neutral. For this circuit to be complete, the lock relay must be energized
by the (HP) control and the door must be closed. An open oven door results in "LOCK
DOOR" flashing in the display after the control has been programmed for clean and
"START" has been depressed.
The lock switch circuit "tells" the control if the lock motor is in the unlocked or locked
position or somewhere in between. There are two lock switches mounted to and
operated by the lock motor.
The lock switch circuit is from the (HP) control, through one of the lock switches
(switch 2 for unlocked or switch 1 for locked) back to the (HP) control. If neither switch
is closed, and the oven temperature is below 600 degrees, the (HP) control will energize
the lock motor circuit until the correct switch closes to complete the circuit. (If circuit
to the correct switch is open, lock motor will run continuously with the oven below
600 degrees.)
CLEAN CYCLE AND LOCK SEQUENCE
1. Program the Clean Cycle:
• Press "SELF-CLEAN" pad. 4 hours (4:00)‚ appears on the time display. (Cleaning
time can be changed from the 4-hour starting point by pressing the up or down arrow.)
• Pressing the up arrow increases the clean time to a maximum of 5 hrs in one-minute
increments. (Press and hold the up arrow to increase in 10-minute increments).
Pressing the down arrow decreases the clean time to a minimum of 3 hrs in
one-minute increments. (Press and hold the down arrow to decrease in 10-minute
increments).
• After "START" has been pressed, the word "ON" illuminates in red to indicate the
cycle has begun.
2. Locking the Door:
• After programming the clean cycle and pressing START pad, the control energizes the
lock relay. Voltage (120 VAC) is applied to the lock motor circuit. Oven door must be
closed before lock motor can run. "LOCK DOOR" will flash and control will beep until
the door is closed.
• The lock motor begins to revolve and turns a cam mounted to the motor shaft.
• The words "LOCKED DOOR" will flash on and off on the display while the lock motor
is in motion.
• As the cam revolves about 1/2 revolution (approximately 12 seconds), it has moved
the lock "hook" into a corresponding slot in the oven door which secures the door.
• The movement of the cam has also closed lock switch
1 which "tells" the control the door is locked. The
LOCKED
control then removes power from the lock motor
circuit by de-energizing the lock relay.
UNLOCK SW.
N.O. CONTACT
• The lock motor stops and lock switch 1 is held closed by
OPEN
the cam through the clean cycle. LOCK POSITION
• The words "LOCKED DOOR" stop flashing and remains
illuminated in the display.
• The word "ON" illuminates in the display.
3. During the Clean Cycle:
• The BROIL relay closes (audible "click") and the broil element begins to heat. The
broil element only will operate during the first 30 minutes of the clean cycle followed
by the bake element only during the remaining time.
• As the clean cycle progresses and the temperature of the oven control area rises, the
cooling fan is activated by the closing of a normally open, disc-type thermal switch.
This thermal switch is mounted behind the (HP) control.
• A second normally closed thermal switch is mounted on a bracket in front of the
cooling fan. This switch is in the lock switch circuit and will open the lock switch circuit
in the event of an over-temperature condition in the control area (caused by a stalled
fan; fan switch failure or similar condition). An -F2- (over-temperature) failure code
will appear on the control if this switch opens while the oven is above 600 degrees.
With the oven between 400 to 600 degrees, the clean cycle will be cancelled by the
opening of the switch and the control will revert back to the time-of-day mode. Below
400 degrees, the lock motor will revolve continuously and the words "LOCKED
DOOR" will flash on the control until the circuit is reestablished.
• The oven will cycle to maintain an average clean temperature of 840°F.
CONVECTION BAKE ELEMENT AND FAN ASSEMBLY
The convection bake element and fan assembly are located on the back wall of the
oven liner behind the panel with the screen in the center.
TO ACCESS CONVECTION BAKE ELEMENT:
OUTER
BACK
1. Disconnect power to range; remove oven door and
PANEL
OVEN
oven racks.
INSULATION
2. Remove 4 screws mounting panel (2 on each side)
OVEN
and pull forward.
LINER
ELEMENT
TO REMOVE CONVECTION BAKE ELEMENT:
FAN
BLADE NUT
Remove 3 screws mounting element to back
wall and pull forward and disconnect wires.
SCREWS
(4)
TO SERVICE FAN:
Fan blade can be replaced from inside oven.
Oven must be removed from installation to
access convection fan motor.
STORAGE DRAWER REMOVAL
TO REMOVE:
1. Pull the drawer out until it stops.
2. Lift the front of the drawer until the stops clear
the guides.
3. Remove the drawer.
TO REPLACE:
STOP
1. Place the drawer rail on the guides.
2. Push the drawer in until it stops.
3. Lift the front of the drawer and push in until the stops clear the guides.
4. Lower the front of the drawer and push in until it closes.
——— If Drawer Won't Close ———
Drawer front panel tipped
Drawer does not close completely away from body side
Rear drawer support
Power cord may be is resting on top of
obstructing drawer guide rail
in this area
——— If Drawer is Crooked ———
Drawer front panel tipped to one side
Rear drawer support
on top of guide rail
on the high side
REMOVABLE OVEN DOOR
COMPONENT COMPARTMENT AIRFLOW
The oven uses a fan for cooling the components. Air is pulled in by the fan blades and
circulated in the component compartment. The air is exhausted through louvers below
the control panel and out the slots above the door.
DOOR ASSEMBLIES:
The doors can be separated into two assemblies: (1) Outer assembly which consists of
handle, vent trim, outer glass, bottom trim and frame; (2) Inner assembly which consists
of inner panel, gasket, glass panels and insulation. The assemblies are held together by
2 screws on each side, along with 4 screws across the bottom.
CAUTION: Care must be taken when mounting door handle not to overtighten handle
screws. Overtightening screws can damage handle. Hand-tighten screws (do not use
electric driver). Make sure handle fits snuggly to door panel.
SELF-CLEAN DOOR GASKET:
The door gasket is attached to the inner door panel
by a chain of spring clips.
1. Locate spring clip at center of gasket and insert in hole on inner door panel near top.
2. Install gasket by bending at 90° beside clip and rocking into hole.
3. Tuck loose ends into slot at the bottom of inner panel.
CAM IN
LOCK SW.
N.O. CONTACT
CLOSED
CONV.
FAN
MTG.
SCREWS
(3)
CONV.
FAN
SUPPORT
OVEN
CAVITY
MOUNTING
FAN SCREWS
BLADE (3)
RAIL
STOP
GUIDE