GE Trivection JT930 User manual

30″ELECTRIC TRIVECTION™WALL OVEN
IMPORTANT SAFETY NOTICE: This information is intended for use by
individuals possessing adequate backgrounds of electrical, electronic and
mechanical experience. Any attempt to repair any major appliance may
result in personal injury and property damage. Neither the manufacturer nor
the seller can be responsible for the interpretation of this information or
assume any liability in connection with its use. THIS BOOKLET PROVIDES
BASIC INFORMATION INTENDED TO ASSIST A KNOWLEDGEABLE
TECHNICIAN IN TROUBLESHOOTING PROBLEMS WITH THE OVEN. FOR
DETAILED INFORMATION ON SERVICING THIS OVEN, REFER TO SERVICE
GUIDE 31-3115.
DISCONNECT POWER BEFORE SERVICING
IMPORTANT: RECONNECT ALL GROUNDING DEVICES. All parts of this
appliance capable of conducting electrical current are grounded. If
grounding wires, screws, straps, clips, nuts or washers used to complete a
path to ground are removed for service, they must be returned to their
original position and properly fastened.
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY.
A. A MICROWAVE EMISSION CHECK SHOULD BE PERFORMED PRIOR TO
SERVICING IF THE OVEN IS OPERATIVE.
B. DO NOT OPERATE OR ALLOW THE OVEN TO BE OPERATED WITH THE
DOOR OPEN.
C. IF THE OVEN OPERATES WITH THE DOOR OPEN:
1. INSTRUCT THE USER NOT TO OPERATE THE OVEN.
2. CONTACT THE MANUFACTURER AND THE CENTER FOR DEVICES
AND RADIOLOGICAL HEALTH IMMEDIATELY.
D. MAKE THE FOLLOWING SAFETY CHECKS ON ALL OVENS TO BE
SERVICED BEFORE ACTIVATING THE MAGNETRON OR OTHER
MICROWAVE SOURCE, AND MAKE REPAIRS AS NECESSARY:
1. INTERLOCK OPERATION
2. PROPER DOOR CLOSING
3. SEAL AND SEALING SURFACES (ARCING, WEAR AND OTHER
DAMAGE)
4. DAMAGE TO OR LOOSENING OF HINGES AND LATCHES
5. EVIDENCE OF DROPPING OR ABUSE
E. BEFORE TURNING ON MICROWAVE POWER FOR ANY TEST OR
INSPECTION WITHIN THE MICROWAVE GENERATING
COMPARTMENTS, CHECK THE MAGNETRON, WAVE GUIDE OR
TRANSMISSION LINE AND CAVITY FOR PROPER ALIGNMENT,
INTEGRITY AND CONNECTIONS.
F. ANY DEFECTIVE OR MISADJUSTED COMPONENTS IN THE INTERLOCK
MONITOR, DOOR SEAL AND MICROWAVE GENERATION AND
TRANSMISSION SYSTEMS SHALL BE REPAIRED, REPLACED OR
ADJUSTED BY PROCEDURE DESCRIBED IN THIS MANUAL BEFORE
THE OVEN IS RELEASED TO THE OWNER.
G. A MICROWAVE LEAKAGE CHECK TO VERIFY COMPLIANCE WITH THE
FEDERAL PERFORMANCE STANDARD SHOULD BE PERFORMED ON
EACH OVEN PRIOR TO RELEASE TO THE OWNER.
GROUNDING SPECIFICATIONS
Ground Path Resistance 0.10 ΩMax.
Insulation Resistance 250 KΩMin.
INSTALLATION POWER REQUIREMENTS
Power Supply: This appliance must be be supplied with proper voltage and
frequency and connected to an individual, properly grounded branch circuit
breaker or time-delay fuse as noted on the rating plate. Wiring must conform to the
National Electrical Code. The rating plate is located on the lower front frame
behind the oven door.
CAUTION: This oven power supply cable is recognized for copper wire only,
NOT ALUMINUM WIRE. Refer to the Installation Instructions for additional details.
OVERCURRENT PROTECTION—
WALL-MOUNTED OVEN
NEC FUSE MAXIMUM KILOWATT RATING
RATING 208V 236V 240V
20 Amp 4.2 4.7 4.8
30 Amp 6.2 7.1 7.2
35 Amp 7.3 8.3 8.4
40 Amp 8.3 9.4 9.6
50 Amp 10.4 11.8 12.0
SERVICE MODE
This electronic control features a service mode to help diagnose a problem caused
by a particular load. To enter Service Mode, disconnect main power to the oven for
at least 15 seconds. Reconnect power and enter ‘0803’ on the keypanel within 5
minutes after the control initializes. Select SERVICE from the SPECIAL MODES
menu. *SERVICE MODE* menu appears. Navigate through SERVICE MODE
menu by pressing the pads next to the NEXT and BACK keys. Available
troubleshooting modes are:
• COOKING LOADS (Verify proper operation of cooking elements, microwave and
convection fan. See troubleshooting section below.)
• DOOR LATCH (Verify proper operation of door lock motor and switches)
• DOOR POSITION (Verify proper operation of door sense switch)
• RTD (Displays oven sensor temperature in red on right display)
• VENT FAN (Verify proper operation of ventilation fan)
• R COOLING FAN (Verify proper operation of cooling fan)
• L COOLING FANS (Verify proper operation of mag cooling fan, HVT fan
and mag stirrer fan)
• OVEN LIGHT (Verify proper operation of oven lights)
• OFFSET (Oven calibration offset in non-microwave modes)
• DISPLAY (Verify operation of display segments by allowing all of them to be
turned on and off. Press CLEAR/OFF key to return display to normal)
• KEYS (Verify proper operation of keypanel)
• LINE VOLT(AGE) (Displays line voltage L1-L2 in the upper temperature display)
• F CODES (Displays up to last 7 ERC Failure Codes)
NOTE: Always check failure codes and then clear them.
• COSENSOR (KENMORE ONLY)
Press EXIT to return to normal cooking mode.
ACRONYM TABLE
CAP = capacitor
COM = common
CO Sensor (on some models) = carbon monoxide sensors
for Sens-a-Clean (on some models)
ERC = engineering range control
F codes = ERC failure codes
HVT = high voltage transformer
J = jumper/connector on a PCB
K = relay on a PCB
MAG = magnetron
MLB = main logic board
MPB = main power board
MW = microwave
NC = normally closed
NO = normally opened
PCB = printed circuit board such as MLB or MPB
RTD = resistive thermal device (oven temperature sensor)
TCO = thermal cutout
TROUBLESHOOTING COOKING LOADS IN SERVICE MODE
CAUTION: TO PREVENT ELECTRICAL SHOCK, USE EXTREME CAUTION
WHEN DIAGNOSING OVEN WITH OUTER COVERS REMOVED AND POWER
“ON”. THE HIGH VOLTAGE CIRCUIT OF THE MAGNETRON POWER
SECTION (HVT, CAPACITOR, DIODE, MAGNETRON) IS 4400 VOLTS
POTENTIAL WITH RESPECT TO GROUND.
WAIT AT LEAST 5 MINUTES AFTER POWERING DOWN BEFORE
SERVICING THE MAGNETRON POWER SECTION.
CAUTION: HEATSINKS ON MAIN POWER BOARD ARE ELECTRICALLY
LIVE. TAKE SPECIAL PRECAUTIONS WHEN TROUBLESHOOTING THE
MAIN POWER BOARD WITH POWER “ON”. WAIT AT LEAST 5 MINUTES
AFTER POWERING DOWN BEFORE SERVICING THE MAIN POWER BOARD.
Cooking loads (bake, broil, convection elements and convection fan) can be
energized individually through SERVICE MODE (Press key next to COOKING
LOADS, then appropriate load.) When the appropriate load is turned on in
SERVICE MODE, first verify that the element is heating or the fan is turning.
If load is not energized, check AC relay voltages according to the second column
in the following table:
SERVICE MODE (CONT.)
RELAY CONTROL TABLE
Note: To turn off all loads that are energized in COOKING LOADS, press the
CLEAR/OFF key or exit the COOKING LOADS menu. If load is not turned off,
additional loads can be turned on at the same time.
If AC voltage measures OK, then check the load (element, fan, lock motor, HVT, etc.)
and/or wiring to the load and repair/replace as required. If there is no AC voltage
supplied to the load through the power relays per the wiring schematic, then check
the DC power supply voltages from the Main Power Board (MPB-J3 connector) to
the Main Logic Board (MLB-J5 connector) according to the following table:
If voltages do not measure according to the table above, replace Main Power
Board. If voltages measure OK, then measure DC voltages according to the
previous relay control table (relay control signals columns 3, 4 and 5). If the MLB-
J3 pins do not provide the correct DC voltages, then replace the Main Logic Board.
SERVICE MODE (CONT.)
If display is blank, oven light does not operate when the oven door is opened and
keypanel does not respond, first check DC power supply voltages. Next, check DC
voltages at MLB J2: J2-2, J2-4, J2-6, J2-8 should be +12VDC. If not, replace Text
Display and/or Time/Temp Display.
If DC power supply voltages are OK:
If display is blank and keyboard is not responding, replace MLB.
If just the display is blank, replace the display.
If just the keyboard is not responding, check glass touch display. If OK, replace MLB.
If oven light does not turn on when door is opened, check oven light relay per
relay troubleshooting table. If relay voltages are OK, check door sense switch per
DOOR SWITCH section.
MICROWAVE
a. Microwave Leakage Test
Place 275mL of water in a 600mL beaker.
Place beaker in center of oven shelf.
Set meter to 2450Hz scale.
Enter SERVICE MODE, press COOKINGLOADS, then MW.
Time for 5 minute test.
Hold probe perpendicular to surface being tested and scan surface at rate
of one inch/sec.
Test following areas:
Entire perimeter of door and control panel.
Viewing surface of door window.
Exhaust vents.
Maximum leakage not to exceed 4 mW/cm2.
Record Data on service invoice and microwave leakage report.
NOTE: Maximum allowable leakage is 5 mW/cm2. 4 mW/cm2is used to
allow for measurement and meter accuracy. Inform manufacturer of any
oven found to have emissions in excess of 5 mW/cm2. Make repairs to
bring the unit into compliance at no cost to the owner and try to determine
cause. Instruct owner not to use oven until it has been brought into compliance.
b. Performance Testing
Standard test load will be 1 liter (1000mL) of water with an initial
temperature 59° ~ 75°F in a 1000mL beaker (PN WB64X73).
Record initial water temperature.
Place beaker in center of middle oven shelf.
Enter SERVICE MODE, press COOKINGLOADS, then MW.
Time for 2 minutes, then open door.
Record end water temperature.
The difference between the initial and ending temperature should be 12°F
minimum at 240VAC.
NOTE: Standard sparkle blocks are not applicable for testing of the
microwave assist mode in this oven.
c. High-Voltage Capacitor
WARNING: The capacitor holds its 4400V charge for at least 2 minutes
after power is removed. Always be certain that the capacitor is discharged
before servicing. Mechanically discharge by placing an insulated handle
screwdriver between the diode connection of the capacitor and oven
chassis ground.
d. Magnetron
The magnetron cannot be serviced from the component compartment;
the unit must be removed from the wall. Be sure to replace the ground
wire under the screw head when installing. Make sure that the magnetron
is seated flat against the mounting surface.
e. Special assembly note
Elements, convection fan and oven light contain special radiation screens
and chokes. Be sure to replace these in the oven cavity. Take special care
not to strip any screws when replacing these components.
229C4059P444-1
The branch circuit load for one
wall-mounted oven or one
counter-mounted cooktop is the
rating on the nameplate of the
appliance. The branch circuit
load for a counter-mounted
cooktop and not more than
two wall-mounted ovens – all
supplied from a single branch
circuit and located in the same
room – shall be computed by
adding the nameplate ratings of
the individual appliances and
treating this total as equivalent
to one range.
MPB MLB Signal Name Min Max
J3-1 J5-1 +12Vdc 11.00Vdc 12.75Vdc
J3-2 J5-2 12Vdc, 5Vdc Ground ——
J3-3 J5-3 +5Vdc 4.7Vdc 5.3Vdc
J3-4 J5-4 12Vdc, 5Vdc Ground ——
J3-5 J5-5 -14Vdc -14.75Vdc -12.75Vdc
J3-6 J5-6 Not Connected —
J3-7 J5-7 L1 thru 2Mohm/.47 uF cap on MPB
J3-8 J5-8 L1 thru 2Mohm/.47 uF cap on MPB
J3-9 J5-9 Not Connected —
J3-10 J5-10 NT thru 2Mohm/.47 uF cap on MPB
J3-11 J5-11 Not Connected —
J3-12 J5-12 L2 thru 2Mohm/.47 uF cap on MPB
120VAC line monitor
240VAC line monitor
240VAC line monitor
120VAC line monitor
CONTROLS DC POWER SUPPLY VOLTAGE TABLE
AC VOLTAGES
SERVICE MODE
Function
Main Pwr Board Relay
ON=120VAC (L1-N or L2-N)
or 240VAC (L1-L2)
OFF=0V
Relay Control
ON = 0Vdc
OFF = 12Vdc
Relay Control
ON = 4.6Vdc
OFF = -14Vdc *
Enable = 4.2Vdc
Disable = -14.0Vdc Notes
L2 = J4-8 (K1-NO) MPB J1-10
MLB J3-10
N = J103
L2 = J4-7 (K5-NO) MPB J1-9
MLB J3-9
N = J103
L1 = J4-5 (K13-NO) MPB J1-4
MLB J3-4
N = J103
HVT T2 = L2 = J107 (K9-NO)
OR
HVT T3 = L2 = J105 (K9-NC)
MPB J1-17
MLB J3-17
OR
MPB J1-17 OFF
MLB J3-17 OFF
MPB J1-1
MLB J3-1
HVT T1 = L1 = J114
L2 = J4-9 (K106-NO) MPB J1-3
MLB J3-3
N = J103
L1 = K10-NO MPB J1-8
MLB J3-8
MPB J1-1
MLB J3-1
L2 = K102-NO (DLB) MPB J1-12
MLB J3-12
L1 = J4-2 (K105-NC) MPB J1-16 OFF
MLB J3-16 OFF
N = J103
L1 = J4-3 (K105-NO) MPB J1-16
MLB J3-16
N = J103
L1 = K7-NO MPB J1-6
MLB J3-6
MPB J1-1
MLB J3-1
L2 = K11-COM (DLB) MPB J1-11
MLB J3-11
L1 = K8-NO MPB J1-7
MLB J3-7
MPB J1-1
MLB J3-1
L2 = K11-COM (DLB) MPB J1-11
MLB J3-11
L1 = J113 (K103-NO) MPB J1-18
MLB J3-18
MPB J1-1
MLB J3-1
L2 = K11-COM (DLB) MPB J1-11
MLB J3-11
L1 = J4-1 (K2-COM) MPB J1-14
MLB J3-14
N = J103
Note: Ground reference for dc volta
g
e measurements MPB = Main Power Board * OFF = 0Vdc if Disable = -14Vdc
is J3-2 or J3-4 on MPB MLB = Main Logic Boardor J5-2 or J5-4 on MLB
Right Cooling Fan
R CoolingFan -> On/Off
Left Cooling Fans
Mag Stirrer
Mag Fan
HVT Fan
L CoolingFans -> On/Off
Fan comes on when entering the
cooking loads menu.
Oven Light
Ovenlight -> On/Off
Microwave
CookingLoads -> MW
K6 (Mag Main Relay) must be energized
MPB J1-5 ON (4.6Vdc)
MLB J3-5 ON (4.6Vdc)
Note: MagTap is automatically selected
by Line Voltage
Door Latch
DoorLatch -> Lock/Unlock
Broil element must be turned off
Bake Element
CookingLoads -> Bake
Bake2 Element
CookingLoads -> Bake2
Broil Element
CookingLoads -> Broil
Broil element must be turned off
DC VOLTAGES
K4 (Convection Fan Relay) must be
energized
MPB J1-15 ON (0Vdc)
MLB J3-15 ON (0Vdc)
Convection Fan
Counter Clockwise
CookingLoads
-> ConvFan -> CCW
Convection Fan
Clockwise
CookingLoads
-> ConvFan -> CW
Vent Fan
VentFan -> On/Off
K4 (Convection Fan Relay) must be
energized
MPB J1-15 ON (0Vdc)
MLB J3-15 ON (0Vdc)
Convection Element
CookingLoads -> ConvElem
Fan comes on when entering the
cooking loads menu.
Fan comes on when entering the
cooking loads menu.

THERMAL SWITCHES
Magnetron TCO –This self-resetting thermal switch is located on top of the
magnetron housing and is wired in series with L1 to the main power board.
This limit switch will open when the temperature on the magnetron reaches
320°F, removing power to the oven, and closes when it cools below 140°F,
restoring power to the oven. Check for proper magnetron cooling fan
operation (blockage, blades not turning).
One-Shot TCO –This thermal switch is located on the rear of the oven
behind the center cover and is wired in series with L2 from the conduit. This
limit switch is a non-resettable device and will open at 302°F, indicating a
thermal runaway condition. If tripped, the oven must be removed from
installation in order for the one-shot TCO to be replaced. Cause of
overheating should be determined when replacing the device.
Sail Switches –The left and right sail switches are normally open limit
switches located at the rear of the component compartment in front of the
cooling fans. These switches monitor the presence of the airstream from the
fans. If either fan malfunctions, the applicable sail switch will open and will
open relay R1 and R2, which disables power to the microwave HVT and
cooking elements.
SPECIAL FUNCTIONS
These are options that change the behavior of the control for a specific
reason and could confuse the consumer if accidentally entered.
•Control Lockout –Press the 7 & 8 keypads at the same time for 3
seconds. The text display will show “Control Is Locked.”To unlock the
control, press the 7 & 8 keypads for 3 seconds. Display will return to the
standard Main Menu.
•Sabbath Mode –This feature disables all but the bake and timed bake
modes. Additionally, the display does not show the temperature and sound
is disabled. The element and oven icons will light to indicate that the oven
is operating and all time functions will remain displayed and active. Sabbath
Mode is accessed through the Features menus. To turn this feature on,
press the keypad next to SABBATH. To turn this feature off, hold the BACK
keypad for 3 seconds. The control will return to the Features menu where
SABBATH was originally selected. NOTE: This feature remains active even
after loss of power to the oven. The only way to exit Sabbath is to hold the
BACK keypad for 3 seconds.
•Sales Mode –Becomes active upon powering up with oven L1-L2 = 120VAC
with special power cord (L1 of oven connected to L of 120V source, L2 and
N of oven connected to N of 120V source). This mode is NOT accessible
on 240V/208V power supply. Must remove 120V power source and apply
240V/208V to exit Sales mode.
•Time of Day Settings –Time of Day Settings are accessible through the
Settings menu. All cooking and cleaning related timed functions (TimedBake,
DelayBake, 2Temps [on some models] and DelayClean) are accessible
through their related cooking or cleaning function if available. The kitchen
timer is a button on the control panel under the time/temperature display.
•Oven Calibration –Oven calibration offset can be adjusted for bake mode
by the consumer by accessing the SETTINGS menu. Press SETTINGS,
then MORE, then MORE then ±temp. Select INCREASE or DECREASE
to change the cooking temperature in 1°increments up to ±35°F.
NOTE: Oven calibration offset can also be accessed through the SERVICE
MODE menu. Enter SERVICE MODE, then press NEXT, then NEXT then
OFFSET.
ERC FAILURE CODES
Failure
Code Meaning Corrections
F0 Keyboard error Perform a key panel test, making
sure to test EVERY pin combination
for possible shorts. If there are no
shorts or signs of delamination, the
problem is probably with the control.
Enter SERVICE MODE, then NEXT,
then NEXT then DISPLAY (ON/OFF).
Press Clear/Off key to reset. If
working properly, enter BACK, then
KEYS and test key functions.
F2 Temperature Runaway—•Check for welded element relay
oven temperature is contacts.
above 630°F unlocked •Check airflow to rear of unit.
or 930°F locked
F3 Open sensor/RTD •Disconnect power to unit and then
disconnect oven sensor harness
from control. Make sure sensor
resistance (white leads) are
–1080Ωat room temperature
with 2Ω/°change. (Pins 1 and 2
of the 12 position connector for
upper wall oven, and pins 11 and
12 for lower wall oven found on
the MLB J7 harness).
F4 Shorted sensor/RTD •Verify resistance. See F3 diagnosis.
•Measure each sensor lead from
connector block to ground. If
shorted, look for pinched or cut
wire in sensor circuit.
•Check connector terminals. Look
for deformity or corrosion on terminals.
Repair or replace if necessary.
•If all above is OK, then replace
the main logic board.
F5 Control Sensor Circuit—•Check sensor circuit for intermittent
Supervisor Error high resistance. See F3 diagnosis.
•Press Clear/Off and reprogram
control. If code reappears, replace
control.
DO NOT REPLACE LOCK MOTOR.
This tests:
a) Redundant measurement
circuits on Main board do not
match closely enough.
b) Door latch motor (and microwave
and convection fan) is not
disabled by temperature
measurement circuits at the
proper temperature.
•Replace the main logic board
F8 EEPROM data error If repeated, replace the main logic board.
FC Door Latch Error •Problem with door lock circuit such
as pinched wires between control
and door lock switches on
motorized lock circuits.
•Check wiring and test operation
of switches.
•Error occurs when both lock and
unlock switches are closed at the
same time.
Fd Display Error •Check main reconfigurable display
connections.
•Replace main reconfigurable display.
•Replace main logic board if error
does not clear.
Note: When trying to enter temperatures lower than 170°F or greater than
550°F in any mode, or lower than 90°F or greater than 120°F in DEHYDRATE
mode (some models only), display will momentarily show “Err”and then the
default minimum or maximum temperature will be entered.
229C4059P444-1
MICROWAVE (CONT.)
f. Safety Interlocks
The microwave interlock system has a left and a right interlock assembly:
Left Interlock Switch Assembly: Door sense switch (NO) and secondary
interlock switch (NO) with 2–two position connector with black and brown
wire outputs.
Right Interlock Switch Assembly: Interlock monitor switch (NC) and
primary interlock switch (NO) with one 4-position connector with red and
black wire outputs.
NOTE: Perform microwave leakage test when replacing or adjusting
interlock switches or door latch.
NOTE: ENSURE THAT POWER IS OFF FOR THE BELOW TESTS.
Testing the Primary & Secondary Interlock Switches
•Disconnect power and remove oven partially from wall. Remove front
part of top cover. Remove interlock switch cover on side of oven.
•Remove interlock switch leads to isolate the switch.
•Check for continuity of switch with door open and door closed:
open = ∞Ω and closed = 0Ω.
Testing the Interlock Monitor Switch
•Remove interlock monitor switch leads to isolate the switch.
•Check for continuity of switch with door open and door closed:
open = 0Ωand closed = ∞Ω.
Testing the Fuse
•Check the 20-amp fuse for continuity and proper size. When replacing,
do not use any other fuse type, size or rating except 250V/20A
Type 3AB ceramic cartridge fuse.
•WARNING: Primary interlock switch and interlock monitor switch
(Right Interlock Switch Assembly) must be replaced when 20 amp fuse
is blown due to operation of interlock monitor switch.
Replacing Interlock
•Replace interlock switch assembly when 20A fuse is blown due to
operation of the monitor switch.
DOOR SWITCHES
Oven Door Sense Switch
The oven door sense switch is located in the left interlock assembly.
Proper operation of the door sense switch is required for proper operation
of the oven light, microwave system, convection fan and the door lock.
To check the door sense switch:
1. Enter SERVICE MODE (see SERVICE MODE section).
2. Select DOOR POSITION option and observe the display as the door is
opened and closed.
3. If the state (open/closed) does not change on the display, turn off power
and check wiring and switch with ohmmeter.

POWER MONITOR ERROR CODES
During Power-Up (occurs only during power-up)
Normal Power–L1-L2 L1-N
No message >150VAC >90VAC AND <150VAC
SUPPLY OPEN L1-L2 L1-N
NEUTRAL NA <90VAC
SUPPLY L1-L2 L1-N
MISWIRED <90VAC >90VAC AND <150VAC
L1-L2 L1-N
NA >150VAC
SENSE 120V L1-L2 L1-N
ENTERING >90VAC and <150VAC >90VAC AND <150VAC
SALES MODE
After Power-Up (can occur anytime during operation)
Normal Power–L1-L2 L1-N
No message NA >90VAC AND <150VAC
SUPPLY OPEN L1-L2 L1-N
NEUTRAL NA <90VAC
SUPPLY L1-L2 L1-N
MISWIRED NA >150VAC
LOW POWER L1-L2 L1-N
<150VAC NA
Note: Low Power supersedes Supply Open Neutral
229C4059P444-1
Cooking Mode Elements Convection Fan Vent Fan Left Cooling
Fans
Right Cooling
Fans
Bake bake & broil as required option to use in
Preheat ON ON ON
Broil broil as re
q
uired NO ON ON ON
Convection Bake Multi convection as re
q
uired YES ON ON ON
Convection Bake 1-Rack bake & broil as re
q
uired YES ON ON ON
Convection Roast bake & broil as re
q
uired YES ON ON ON
Self-Clean bake & broil as re
q
uired
Speed bake
bake, convection, broil
and microwave as
re
q
uired
YES - as required ON
ON
Speed broil broil & microwave as
re
q
uired YES - as required ON ON
Defrost microwave as re
q
uired YES - as re
q
uired ON ON
Proof (some models) oven li
g
ht YES - as re
q
uired ON ----- -----
Dehydrate (some models) convection as re
q
uired YES ON ON ON
Left cooling fan turns OFF after 5 minutes if the current oven operation does not require it ON.
The vent fan turns OFF after a minimum of 7 minutes and the sensor temperature <200°F for 2 minutes.
The right cooling fan turns OFF after a minimum of 7 minutes and the sensor temperature <200°F for 2 minutes or after
about 20 minutes, whichever comes first.
NOTE: For the bake, broil or convection elements or the microwave to operate, BOTH THE LEFT AND COOLING FANS
MUST BE ON and engage the sail switches.
NO OFF ON ON
ON
ON
ON
MAIN POWER BOARD WIRING
GENERAL OPERATION—
BASICS OF ELEMENT CYCLING

229C4059P444-1
MODEL NUMBER
JT930
ZET3038
22-4922*
IMPORTANT
SERVICE INFORMATION
DO NOT DISCARD
31-14134-1 08-03 JR
229C4048G494-1