GE CGS990 Wiring Diagrams page 2

GAS, FREESTANDING, SELF-CLEANING RANGE
DOOR LATCH
The latch mechanism is thermally operated. When the SELF
CLEAN cycle is selected, the latch will automatically lock for
cleaning and unlock after cleaning. The door locks immediately
and will remain locked until the oven has dropped below these
temperatures (about 420˚F.)
UPPER LOCK MECHANISM AND LOCK SWITCH
ACCESS
1. Remove oven door.
2. Remove the cooktop (see Remove Cooktop in this manual.)
3. Remove manifold panel (remove phillips head screws from burner flame adjustment
switch and 1/4" hex head screws from the underside of the manifold panel.)
4. Remove cover over lock mechanism (remove 1/4" hex head screws on each side of
the cover.)
5. Label and remove wires from lock switch.
6. Remove screws securing lock mechanism to oven frame.
7. Remove mechanism.
Note: After installing mechanism, rotate lock to unlock position to prevent low
temperature lock-up.
LOWER LOCK MECHANISM AND LOCK SWITCH ACCESS
1. If upper door is locked, see Upper Lock Mechanism
and Lock Switch Access to disengage the upper
lock mechanism and remove the upper door.
2. Remove 2 hex screws from front that attach the
lower lock mechanism to the front frame. If lower
door is locked, disengage latch hook to remove
lower oven door.
3. Remove the cooktop (see To Remove Cooktop in
this manual.)
4. Remove manifold panel (remove Phillips
head screw from left and right burner flame
adjustment switch and 1/4" hex head screws
from the underside of the manifold panel.)
5. Remove left side panel (Remove screws at top connecting to burner box. Remove
screws at rear connecting to range back. Remove screw at bottom front connecting to
front frame. Remove screw at top front connecting to side post.)
6. Lower lock mechanism is located between the upper and lower oven near the front of the unit.
Note: After installing mechanism, rotate lock to unlock position to prevent low
temperature lock-up.
ERC FAILURE CODES
The oven may stop operating but not give an F code on the display immediately. F codes
are stored in nonvolatile eprom 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.
FAILURE CODE MEANING & CORRECTIONS
FAILURE CODES WILL BE SHOWN IN THE OVEN CONROL BY PRESSING THE
(TIMER), (8) & (9) KEYS AT THE SAME TIME
FAILURE
MEANING CORRECTION
CODE
F0 CLEAR/OFF key input Short for approximately 100 seconds.
failure
F1 Control Failure Loss of element relay redundant driver protection.
F2 Oven temperature Oven above 640˚F with Lock input untrue. Oven above
condition due to 915˚F with Lock input true.
sensor input to
control
F3 Open Sensor Sensor is 2900 to infinite ohms while in a heating
mode.
F4 Shorted Sensor Sensor is 0 to 950 ohms maximum while in a heating
mode.
F6 Failed Gas Valve Open harness switch and/or installed gas lockout
Lockout motor.
F7 Shorted key detection Short for approximately 40 seconds.
except for slew entry
and Clear/Off keys
F9 Door lock false "Unlock" Latch Changing status to "Lock". Latch of
while above Motor changing to "Un-Lock" while above run away set
Runaway Setpoint, point.
Unlatched Door Lock
temperature OR
FAD device setpoint
exceeded.
FC Door Latch error Unlock home and lock home are try simultaneously.
FD Probe failure Shorted Probe
FF Control failure Loss of door motor redundant driver protection.
TO SELF CLEAN IN LOWER OVEN
1. Press SELF CLEAN.
2. Press number pads to enter desired time (4:00 hours is standard).
3. Press START pad.
4. LOr and door will be displayed and LOCKED will be flashing. CLEAN will be on and
solid indicating the gas valve and doors are locking and the unit is entering self clean.
The gas valve locks first, then the lower door, then the upper door. The call for heat
will begin once everything has locked successfully. Towards the end of the cycle, the
lower door will unlock, then the upper door, and finally the gas valve. LOCKED will
flash while the doors are unlocking. LOC will flash while the gas valve is unlocking.
TO SELF CLEAN IN UPPER OVEN
1. Turn thermostat to SELF CLEAN position.
2. Press START pad (default time is 5:00 and cannot be changed).
3. UPr and door will be displayed and LOCKED will be flashing. CLEAN will be on and
solid indicating the gas valve and doors are locking and the unit is entering self clean.
The gas valve locks first, then the lower door, then the upper door. The call for heat
will begin once everything has locked successfully. Towards the end of the cycle, the
lower door will unlock, then the upper door, and finally the gas valve. LOCKED will
flash while the doors are unlocking. LOC will flash while the gas valve is unlocking.
NOTE FOR SELF CLEAN IN UPPER OR LOWER OVEN: Average clean temperature is
790˚F. Cool down period is 1 hour at the end of the cycle. The self-clean operation
can only be initiated when the range is at room temperature. If any recent oven
cooking has been done, allow the range to cool to room temperature before initiating
a self-clean cycle. If you try to initiate a self-clean cycle in either of the ovens before
the range has reached room temperature, the following will occur: Initially, the
display will look normal. 15 seconds after initiating the cycle, the control will begin
to beep about once every second for approximately 1 minute. After 1 minute, the
beeping will cease and the display will flash the word. LOC. After 15 seconds, the
control will show the time of day, indicating it is now in the standby mode and the
self-clean cycle has been terminated.
Lower lock
OVEN TEMPERATURE CALIBRATION
mechanism
The bake temperature can be adjusted from its factory calibration (+ or -) 35˚F in 1˚
increments.
1. Press and hold both the BAKE and WARM pads for about 2 seconds until the
display shows SF.
2. Press the BAKE pad. The current offset setting is shown in the display.
3. Enter the desired temperature offset using the number pads.
4. Use the BAKE pad to toggle between +/-.
5. Press START key. The display will return to Time or Day Clock.
BAKE BURNER REMOVAL UPPER OVEN
• Remove oven door and drawer.
• Remove the screws on the oven floor at the back of the oven cavity and remove
oven floor/deflector.
• Remove 1/4" hex head screws from the bracket holding the burner to
wall of the range.
• Remove the screw at the front of the burner.
• Disconnect the igniter wires.
• Remove the Bake Burner.
BAKE BURNER REMOVAL LOWER OVEN
• Remove oven door and drawer.
• Remove the screws on the oven floor at the back of the oven cavity and remove
oven floor/deflector.
• Remove the screw at the front of the burner.
• Disconnect the igniter wires.
• Remove the Bake Burner
BACKGUARD DISASSEMBLY
• Remove screws located on the back of the backguard. (There is a set of screws on
each side.)
• Remove the torx screw on the front inside corner of backguard (1 on each side).
• Gently lift backguard off.
• Be sure to reassemble rear cover and backguard per original assembly.
OVEN BURNER IGNITION SYSTEM
The ignitor is a "Norton" style rectangular glowbar. The ignition circuit consists of
the electronic control, the igniter, and the oven safety valve (gas valve). The three
components are wired in series.
The most important points to know about the ignition system are:
1. THE IGNITOR RESISTANCE DECREASES AS THE IGNITER SURFACE TEMPERATURE
INCREASES.
2. THE SAFETY VALVE OPERATES BY CURRENT, NOT VOLTAGE.
From a cold start, the ignitor needs 30-60 seconds, with voltage applied, to reduce the
electrical resistance enough to provide a minimum of 2.9 amps of current flow in the
series circuit. This is the required current flow needed for the safety valve to open to
supply gas to the burner. The glowbar should provide a steady current flow of between
3.2 to 3.6 amps flowing in the circuit. The igniter will remain energized at all times
during burner operation. If the igniter glows red but does not draw at least 2.9 amps,
the fault is usually with the igniter, not the valve. Always check the oven shut-off valve
for a "No Oven" condition.
the back
CIRCUIT TERMINALS OHMS CONDITION
OVEN 6 to 8 1100 OVEN AT ROOM
SENSOR TEMPERATURE
DOOR 3 to 5 0 DOOR LATCH IN BAKE/BROIL
UNLATCHED POSITION
DOOR 4 to 5 0 DOOR LATCH IN CLEAN
LATCHED POSITION
MEAT 1 to 2 55000 AT ROOM TEMPERATURE
PROBE MEAT PROBE INSERTED
WIRING DIAGRAM
WARNING
Power must be disconnected
before servicing this appliance.
SENSOR AND LOCK SWITCH CIRCUIT
OVEN TEMP SENSOR
1100 OHMS AT ROOM TEMP
2650 OHMS AT CLEAN TEMP
RELAY CONTACT TO OPERATION TEST
RELAY TERMINALS VOLTAGE IN MODE
BAKE BAKE to N 120 VAC IN BAKE*
BROIL BROIL to N 120 VAC IN BROIL**
LATCH MDL to N 120 VAC
OVEN LIGHT to L1 120 VAC
LIGHT
FAN LO FAN L to N 120 VAC IN CONVECTION
1
SPEED BAKE*
MEAT PROBE CIRCUIT
PINS 1 & 2
2 FAN HI FAN H to N 120 VAC IN CONVECTION
SPEED ROAST*
3 UNLOCKED DOOR
LOCKED DOOR * Be sure to select a temperature or setting
4
** Must be in Bake cycle. Wait until preheat has completed and call for heat initializes.
LOCK COMMON
5
6
MEAT SENSOR CIRCUIT
PINS 6 & 8 CGS990 DOUBLE OVEN -2K5
8
222D6585P010
VOLTAGE IN OFF
0 VAC IN OFF
0 VAC IN OFF
0 VAC IN OFF
0 VAC IN OFF
0 VAC IN OFF
0 VAC IN OFF
31-14982-2 07-11