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KitchenAid KEMS378S Technical Education

27" & 30" electric built-in microwave/oven combination
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KAC-46
TECHNICAL EDUCATION
27˝ & 30˝ ELECTRIC
BUILT-IN MICROWAVE/OVEN
COMBINATION
MODELS: KEMS378S & KEMS308S
JOB AID 4317410

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  Summary of Contents for KitchenAid KEMS378S

  • Page 1 KAC-46 TECHNICAL EDUCATION 27˝ & 30˝ ELECTRIC BUILT-IN MICROWAVE/OVEN COMBINATION MODELS: KEMS378S & KEMS308S JOB AID 4317410...
  • Page 2 FORWARD This KitchenAid Job Aid “27˝ & 30˝ Electric Built-In Microwave/Oven Combination” (Part No. 4317410), provides the In-Home Service Professional with information on the installation, opera- tion, and service of the 27˝ & 30˝ Electric Built-In Microwave/Oven Combination. For specific information on the model being serviced, refer to the “Use and Care Guide,”...
  • Page 3: Table Of Contents

    TABLE OF CONTENTS Page GENERAL ..........................1-1 Oven Safety ........................1-1 Model & Serial Number Designations ................1-3 Model & Serial Number Label And Tech Sheet Locations ..........1-4 Specifications ........................1-5 INSTALLATION INFORMATION .................... 2-1 Installation Requirements ....................2-1 Installation Instructions ......................
  • Page 4 Page COMPONENT TESTING ......................5-1 UPPER OVEN COMPONENTS ..................5-1 Humidity Sensor ......................5-1 Cavity Thermostat ......................5-1 Microwave Light Transformer ..................5-2 Convection Thermoactuator ................... 5-2 Monitor Fuse ........................5-3 Microwave Door Interlock Switches ................5-3 Magnetron Thermostat ....................5-4 Magnetron ........................
  • Page 5: General

    GENERAL OVEN SAFETY Your safety and the safety of others are very important. We have provided many important safety messages in this manual and on the appliance. Always read and obey all safety messages. This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and others.
  • Page 6 PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY a. Do not operate or allow the oven to be operated with the door open. b. 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.
  • Page 7: Model & Serial Number Designations

    MODEL & SERIAL NUMBER DESIGNATIONS MODEL NUMBER PRODUCT GROUP K = KITCHENAID PRODUCT IDENTIFICATION EB = ELECTRIC BUILT-IN OVEN EH = ELECTRIC BUILT-IN HI SPEED COMBO EM = ELECTRIC BUILT-IN MICRO COMBO EW = ELECTRIC WARMING OVEN/DRAWER GB = GAS BUILT-IN OVEN...
  • Page 8: Model & Serial Number Label And Tech Sheet Locations

    MODEL & SERIAL NUMBER LABEL AND TECH SHEET LOCATIONS The Model/Serial Number label and Tech Sheet locations are shown below. Tech Sheet Location (Under Top Cover) Model & Serial Number Label Location...
  • Page 9: Specifications

    SPECIFICATIONS Model Number KEMS378SBL, BT, SS, WH KEMS308SBL, BT,SS,WH Model Description MW/BI Combo MW/BI Combo Size - Configuration 27˝ 30˝ Feature Level/Series Superba Superba Predecessor Model (Model This KEMC377KBL/KEMC378KBL/ KEMC307KBL/KEMC308KBL/ Model Replaces) KEHC379JBL KEHC309JBL Dimensions Exterior Dimensions Overall Height 42˝ 42˝...
  • Page 10 Model Number KEMS378SBL, BT, SS, WH KEMS308SBL, BT,SS,WH Interior Lower/Main Oven Cleaning System Self Cleaning Self Cleaning Main Oven Liner Finish Blue Porcelain Blue Porcelain Main Oven Dimensions Main Oven Volume (cu ft) Main Oven Height 16˝ 16˝ Main Oven Width 22˝...
  • Page 11: Installation Information

    INSTALLATION INFORMATION INSTALLATION REQUIREMENTS TOOLS AND PARTS • Recessed installation area must provide complete enclosure around the recessed Gather the required tools and parts before start- portion of the oven. ing installation. Read and follow the instructions • Grounded electrical supply is required. See provided with any tools listed here.
  • Page 12: Cabinet Dimensions

    Cabinet Dimensions It is not recommended to ground to a gas pipe. 27˝ (68.6 cm) and 30˝ (76.2 cm) Ovens Check with a qualified electrical installer if you are not sure the oven is properly grounded. It is not recommended to have a fuse in the neutral or ground circuit.
  • Page 13 • Models rated from 7.3 to 9.6 kW at 240 volts • Do not cut the conduit. The length of conduit (5.5 to 7.2 kW at 208 volts) require a separate provided is for serviceability of the oven. 40-amp circuit. Models rated at 7.2 kW and •...
  • Page 14: Installation Instructions

    INSTALLATION INSTRUCTIONS PREPARE BUILT-IN MICROWAVE/ REMOVE OVEN DOOR OVEN COMBINATION IMPORTANT: Use both hands to remove oven door. Decide on the final location for the oven. Locate existing wiring to avoid drilling into Open the oven door. or severing wiring during installation. Locate the oven door latches in both corners of the oven door, and rotate the latches WARNING...
  • Page 15: Make Electrical Connection

    MAKE ELECTRICAL CONNECTION Electrical Connection Options Chart WARNING If your home has: Go to section: 4-wire 4-wire Cable from Home Power Supply ½" (1.3 cm) 3-wire 3-wire Cable from Home Power Supply Electrical Shock Hazard Disconnect power before servicing. ½" (1.3 cm) Use 8 gauge solid copper wire.
  • Page 16: Install Oven

    INSTALL OVEN 3-Wire Cable from Home Power Supply - U.S. Only WARNING IMPORTANT: Use the 3-wire cable from home power supply where local codes permit a 3-wire connection. Excessive Weight Hazard Use two or more people to move and install oven. Failure to do so can result in back or other injury.
  • Page 17: Complete Installation

    Securely fasten oven to cabinet using the 10. Check that the door is free to open and #8-14 x 1˝ screws (2 for single oven, 4 for close. If it is not, repeat the removal and double oven) provided. Insert the screws installation procedures.
  • Page 18 Check Operation of Microwave Oven Touch START to resume preset cycle. The microwave oven should begin cooking, and Fill a microwave-safe container with 1 cup the microwave oven interior light should be (250 mL) of water and place container inside microwave oven.
  • Page 19: Product Operation

    PRODUCT OPERATION % OZ FC LBS POWER TIMER MAXIMUM TIME REMAINING % OZ FC LBS POWER TIMER MAXIMUM TIME REMAINING ELECTRONIC OVEN CONTROL CONTROL LOCK DONENESS The Control Lock shuts down the control panel Doneness may be adjusted to more done, less keys to avoid unintended use of the oven.
  • Page 20: Sabbath Mode

    SABBATH MODE CONVECTION BROIL The Sabbath Mode sets the oven to remain on in a bake setting until turned off. A timed Sab- bath Mode can also be set to keep the oven on for only part of the Sabbath. When the Sabbath Mode is set, only the number and start keys will function, no tones will sound, and the displays will not show messages or tem-...
  • Page 21 TEMPERATURE PROBE DEHYDRATING (on convection models, closed door) WARNING Dehydration is a method used to preserve food. Various factors, such as the quality of the fresh food, pretreatment techniques, the size and thickness of the food, and the climate may af- fect the finished product.
  • Page 22 — NOTES —...
  • Page 23: Component Access

    COMPONENT ACCESS This section instructs you on how to service each component inside the KitchenAid 27˝ & 30˝ Electric Built-In Microwave/Oven Combination. The upper oven components and their locations are shown below. The lower oven component locations are shown on page 4-27.
  • Page 24: Removing The User Interface And The Oven & Microwave Control Board Assemblies

    REMOVING THE USER INTERFACE AND THE OVEN & MICROWAVE CONTROL BOARD ASSEMBLIES WARNING c) Disconnect the two ribbon cable con- nectors from the user interface and remove the interface. Electrical Shock Hazard Disconnect power before servicing. User Interface Ribbon Cables Replace all parts and panels before operating.
  • Page 25: Removing The Humidity Sensor And The Cavity Thermostat

    REMOVING THE HUMIDITY SENSOR AND THE CAVITY THERMOSTAT WARNING MW Relay Board Humidity Sensor Cavity Thermostat To remove the humidity sensor: Electrical Shock Hazard a) Remove the two screws from the hu- Disconnect power before servicing. midity sensor. Replace all parts and panels before operating.
  • Page 26: Removing The Control Power And The Microwave Light Transformers

    REMOVING THE CONTROL POWER AND THE MICROWAVE LIGHT TRANSFORMERS WARNING Control Power Transformer MW Light Transformer To remove the control power trans- former: Electrical Shock Hazard a) Disconnect the 2-wire transformer connec- tor from the left side panel connector. Disconnect power before servicing. b) Remove the two screws from the trans- Replace all parts and panels before former and remove the transformer.
  • Page 27: Removing The Convection Thermoactuator And The Wide Interface Board

    REMOVING THE CONVECTION THERMOACTUATOR AND THE WIDE INTERFACE BOARD WARNING Convection Thermoactuator WIDE Interface Board To remove the convection thermoactuator: a) Disconnect the two wire connectors from the terminals. Electrical Shock Hazard b) Remove the two screws and remove Disconnect power before servicing. the thermoactuator.
  • Page 28: Removing The Monitor Fuse And The Microwave Appliance Manager

    REMOVING THE MONITOR FUSE AND THE MICROWAVE APPLIANCE MANAGER WARNING Monitor Fuse Microwave Appliance Manager To remove the monitor fuse holder: a) Remove the fuse from the fuse holder. Electrical Shock Hazard b) Disconnect the two wire connectors from the fuse holder terminals. Disconnect power before servicing.
  • Page 29: Removing The Microwave Door Interlock Switches And The Cavity Light

    REMOVING THE MICROWAVE DOOR INTERLOCK SWITCHES AND THE CAVITY LIGHT WARNING Cavity Light Primary & Monitor Sec. Interlock Sw. Interlock Switches To remove the secondary interlock switch: a) Remove the two mounting bracket Electrical Shock Hazard screws from the front of the switch Disconnect power before servicing.
  • Page 30 To remove the primary or monitor in- c) Monitor (rear): Disconnect the red terlock switch: (COM) and blue (N.C.) wires from the switch terminals. a) Place the blade of a flat-blade screw- driver between the switch body and the RD (COM) holder.
  • Page 31: Removing The Magnetron Thermostat And The Magnetron

    REMOVING THE MAGNETRON THERMOSTAT AND THE MAGNETRON WARNING To remove the magnetron thermostat: a) Disconnect the two wire connectors from the thermostat terminals. b ) Remove the two screws from the ther- mostat and remove the thermostat. Wire Connectors Electrical Shock Hazard Disconnect power before servicing.
  • Page 32 d) Remove the eight screws from the f) IMPORTANT: Touch a screwdriver top right side cover and remove the shaft to the two filament connectors cover. and chassis ground. g) Disconnect the two red filament wires from the magnetron terminals. h) Remove the four screws from the mag- netron, move the end of the microwave relay board bracket out of the way, and...
  • Page 33: Removing The Main L1 Filter, Main L2 Filter, And Grill Thermostat

    REMOVING THE MAIN L1 FILTER, MAIN L2 FILTER, AND GRILL THERMOSTAT WARNING Main L1 Filter Main L2 Filter Grill Thermostat Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before To remove the main L1 filter: operating. a) IMPORTANT: Discharge the main L2 Failure to do so can result in death or filter by touching the leads of a 20,000...
  • Page 34 c) Disconnect the wires from the main L1 c) Disconnect the wires from the main L2 filter board as follows: filter terminals. White at P31 (to 3-pin plug) Black at P32 Brown at P33 White at P34 d) Remove the mounting screw and re- Main L2 Filter move the board from the bracket.
  • Page 35: Removing The Magnetron Fan Motor & The Inverter

    REMOVING THE MAGNETRON FAN MOTOR & THE INVERTER WARNING Remove the ten screws from the upper rear cover of the oven and remove the cover. Upper Rear Cover (10 Screws) Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating.
  • Page 36 c) Remove the magnetron fan motor hous- g) Pull the blower off the magnetron fan ing assembly and set it on top of the motor shaft. oven. d) Disconnect the two black wires from the magnetron fan motor terminals. Motor Shaft Magnetron Fan Blower Magnetron Fan Motor Wires To remove the inverter:...
  • Page 37 c) IMPORTANT: Touch a screwdriver i) Disconnect the wires from the inverter shaft to the two filament connectors as follows: and chassis ground. 2 red wires from CN703 Screw at green/yellow wire E701 d) Disconnect the two filament wires from 3-wire connector at CN701 the magnetron terminals.
  • Page 38: Removing The Convection Thermistor And Grill Element

    REMOVING THE CONVECTION THERMISTOR AND GRILL ELEMENT WARNING Remove the seven screws from the outer convection cover and remove the cover. Outer Convect. Cover (7 Screws) Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.
  • Page 39 c) Disconnect the convection thermistor c) Open the microwave oven door. connector from appliance manager con- d) Twist the front grill element support 90° nector P6 and remove the thermistor. in either direction and remove it from the cavity slot. Front MW Grill Element Support e) Lower the front of the grill element, pull the element terminals out the back...
  • Page 40: Removing The Lower Oven Appliance Manager

    REMOVING THE LOWER OVEN APPLIANCE MANAGER WARNING AC Wiring Conduit Connector Upper Left Side Cover Electrical Shock Hazard (8 Screws) Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.
  • Page 41 Disconnect the wire connectors from the Unclip the six tabs from the lower oven lower oven appliance manager board pins. appliance manager and remove it from the The wire connector colors are as follows: housing. T1 = PK/WH, PK T2 = 2 PK T3 = OR, RD, YL, BU T4 = 2 BK P9 = GY, BK...
  • Page 42: Removing The Line Fuse Holder & Lower Oven Light Transformer

    REMOVING THE LINE FUSE HOLDER & LOWER OVEN LIGHT TRANSFORMER WARNING To remove the line fuse and holder: a) Pull the fuse out of the holder clips. b) Disconnect the two black wires from the fuse holder terminals. c) Remove the two screws from the fuse holder and remove it.
  • Page 43: Removing The Ac Terminal Block

    REMOVING THE AC TERMINAL BLOCK WARNING Remove the nuts from the black, white, and red wires and remove the wires from the terminal block studs. Remove the two mounting screws from the terminal block and remove it from the side cover.
  • Page 44: Removing The Convection Thermostat, Ring Element, And Fan Motor

    REMOVING THE CONVECTION THERMOSTAT, RING ELEMENT, AND FAN MOTOR WARNING Remove the seven screws from the outer convection cover and remove the cover. Outer Convect. Cover (7 Screws) Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating.
  • Page 45 To remove the convection ring element: To remove the convection fan motor: a) Disconnect the two wires from the ring a) Disconnect the two wires from the fan element terminals. motor terminals. b) Remove the six screws, (including the b) Remove the six screws, (including the cavity thermostat clip), from the inner cavity thermostat clip), from the inner convection cover, remove the cover,...
  • Page 46: Removing The Turntable Motor

    REMOVING THE TURNTABLE MOTOR WARNING Remove the four screws from the front control subpanel, remove the subpanel assembly, and lay it on top of the oven. Front Subpanel Screws Electrical Shock Hazard Remove the six screws from the left and Disconnect power before servicing.
  • Page 47 Unhook and remove the AC wiring conduit 11. Set the control subpanel assembly in its connector from the back of the upper left place on the front of the oven and hold it side cover. in place so it does not fall. Remove the five screws from the upper NOTE: You will need something approximately left side cover and remove the cover.
  • Page 48 14. Lower the motor as far as possible, pull the turntable coupler off the motor shaft and Turntable Coupler remove the motor from the oven. 15. Remove the cardboard insulator and the round rubber spacer from the motor. 16. Disconnect the two wire connectors from the motor terminals.
  • Page 49: Lower Oven Components

    Lower Oven Components Blower Speed Resistor Blower Motor Lower Temperature Sensor (On Oven Liner) Blower Door Latch Assembly Oven Shutdown Thermal Cutoff (non-resettable) Halogen Light Meat Probe Convection Ring Element IN/OUT Broil Element Convection Fan Motor Oven Door Glass Door Gasket Halogen Lights Hidden Bake Element 4-27...
  • Page 50: Removing The Door Latch Assembly

    REMOVING THE DOOR LATCH ASSEMBLY Remove the two screws from the door latch WARNING assembly, pull the latch assembly back to remove the latches from the cutouts, and then lift and pull it forward so that you can access the wiring. Electrical Shock Hazard Disconnect power before servicing.
  • Page 51 To remove the latch motor, remove the 10. To remove the door or latch switch, two motor screws from the bottom of the remove the bracket screw. NOTE: You will assembly. have to remove the latch motor (in step 9) to access the door or latch switch screws.
  • Page 52: Removing The Broil Element And The Oven Temperature Sensor

    REMOVING THE BROIL ELEMENT AND THE OVEN TEMPERATURE SENSOR WARNING Broil Element Screws Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. b) Pull the broil element forward until you can access the wire terminals.
  • Page 53 To remove the oven temperature sen- e) Disconnect the sensor wire connector sor: from the wiring harness. a) Remove the screws from the sensor f) Push the sensor wire connector through bracket. the oven liner hole from the rear of the oven.
  • Page 54: Removing The Convection Ring Element And The Convection Fan Motor

    REMOVING THE CONVECTION RING ELEMENT AND THE CONVECTION FAN MOTOR WARNING To remove the convection ring element: a) Remove the two screws from the ele- ment brackets. Ring Element Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating.
  • Page 55 To remove the convection fan motor: d) Remove the twelve screws from the low- er rear cover and remove the cover. a) Remove the 10mm hex nut from the convection fan blade (left-hand rotation) and remove the blade from the motor shaft.
  • Page 56: Removing A Halogen Light Assembly And The Meat Probe Jack

    REMOVING A HALOGEN LIGHT ASSEMBLY AND THE MEAT PROBE JACK WARNING b) Unclip the lens from the socket and remove the lens. Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before Lens Clip operating. Failure to do so can result in death or electrical shock.
  • Page 57 To remove the meat probe jack: a) Remove the nut from the meat probe jack. Remove Access Cover Meat Probe Jack Nut d) Remove the meat probe jack from the right side cover. e) Disconnect the wires from the meat b) Remove the oven from its mounting probe jack terminals.
  • Page 58: Removing The Blower Assembly, Blower Seed Resistor, And Oven Shutdown Thermal Cutoff

    REMOVING THE BLOWER ASSEMBLY, BLOWER SPEED RESISTOR, AND OVEN SHUTDOWN THERMAL CUTOFF WARNING Blower Electrical Shock Hazard Blower Speed Blower Motor Oven Shutdown Resistor Disconnect power before servicing. To remove the blower assembly: Replace all parts and panels before a) Disconnect the white and gray wires operating.
  • Page 59 To remove the oven shutdown thermal cutoff (TCO): a) Disconnect the two red wires from the TCO Wires TCO terminals. b) Remove the two mounting screws and remove the TCO. Screws 4-37...
  • Page 60: Removing The Hidden Bake Element

    REMOVING THE HIDDEN BAKE ELEMENT Disconnect the two red wires from the hid- WARNING den bake element terminals. Remove the four screws from the hidden bake element cover. Hidden Bake Element Cover Screws Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before Red Wires operating.
  • Page 61 NOTE: When you remove the hidden bake element, press down on the front edge of the panel that is below the element so that it does not interfere with the removal. 10. Pull the hidden bake element out and re- move it from the bottom of the oven.
  • Page 62: Removing The Oven Door Glass And Handle

    REMOVING THE OVEN DOOR GLASS AND HANDLE Close the oven door to within several inches, Open the lower oven door. lift and pull out on the hinges, and remove Raise the two door hinge tabs to the “un- them from the oven slots. locked”...
  • Page 63 c) Remove the four door handle bracket Handle Brackets & Screws screws and remove the brackets and handle from the door. d) Slide the bottom edge of the outer oven door glass out of the door frame and remove the glass. Outer Door Glass Door Frame 4-41...
  • Page 64: Removing The Oven Door Gasket

    REMOVING THE OVEN DOOR GASKET Remove the lower oven door (see the pro- Remove the screw from the door gasket cedure on page 4-40). retainer and remove the retainer. Pull the door gasket clips out of the oven liner holes and remove the gasket. Gasket Clip Door Gasket Gasket Retainer Screw...
  • Page 65: Component Testing

    COMPONENT TESTING UPPER OVEN COMPONENTS • Conduct a microwave energy test after per- • Unplug oven or disconnect power. forming any tests or repairs to the microwave • Remove the lead wires from the related oven. component before conducting any of the •...
  • Page 66: Microwave Light Transformer

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. MICROWAVE LIGHT TRANSFORMER CONVECTION THERMOACTUATOR Refer to page 4-4 for the procedure for access- Refer to page 4-5 for the procedure for access- ing the microwave light transformer.
  • Page 67: Monitor Fuse

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. MICROWAVE DOOR MONITOR FUSE INTERLOCK SWITCHES N.O. Refer to page 4-6 for the procedure for access- Refer to page 4-7 for the procedure for access- ing the monitor fuse.
  • Page 68: Magnetron Thermostat

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. MAGNETRON THERMOSTAT MAGNETRON Filament Terminals Refer to page 4-9 for the procedure for access- Refer to page 4-9 for the procedure for access- ing the magnetron thermostat.
  • Page 69: Main L1 & L2 Filters

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. MAIN L1 & L2 FILTERS GRILL & CONVECTION THERMOSTATS Main L2 Filter Grill Thermostat Convection Thermostat Main L1 Filter Refer to page 4-11 for the procedure for ac-...
  • Page 70: Magnetron Fan Motor

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. MICROWAVE INVERTER BOARD MAGNETRON FAN MOTOR CN702 CN701 E701 CN703 Refer to page 4-13 for the procedure for ac- Refer to page 4-13 for the procedure for ac- cessing the magnetron fan motor.
  • Page 71: Grill Element

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. GRILL ELEMENT LOWER OVEN LIGHT TRANSFORMER LINE (Primary) Terminals Grill Element LOAD (Secondary) Terminals Refer to page 4-16 for the procedure for ac- Refer to page 4-20 for the procedure for ac- cessing the grill element.
  • Page 72: Microwave Convection Ring Element

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. MICROWAVE CONVECTION MICROWAVE CONVECTION RING ELEMENT FAN MOTOR Refer to page 4-22 for the procedure for ac- Refer to page 4-22 for the procedure for ac- cessing the microwave convection ring ele- cessing the microwave convection fan motor.
  • Page 73: Turntable Motor

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. MEASURE OVEN INPUT CURRENT TURNTABLE MOTOR Connect an ammeter (Valhalla Scientific 2101 or equivalent recommended) to measure the input current of microwave oven when the power level is set to Level 10 at the touch panel.
  • Page 74: Lower Oven Components

    LOWER OVEN COMPONENTS WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. DOOR LATCH ASSEMBLY 1 2 3 4 5 6 7 Refer to page 4-28 for the procedure for ac- cessing the door latch assembly.
  • Page 75: Broil Element

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. BROIL ELEMENT OVEN TEMPERATURE SENSOR Refer to page 4-30 for the procedure for ac- Refer to page 4-30 for the procedure for ac- cessing the broil element.
  • Page 76: Convection Ring Element

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. CONVECTION RING ELEMENT CONVECTION FAN MOTOR Refer to page 4-32 for the procedure for ac- Refer to page 4-32 for the procedure for ac- cessing the convection ring element.
  • Page 77: Meat Probe Jack

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. MEAT PROBE JACK BLOWER MOTOR Refer to page 4-34 for the procedure for ac- Refer to page 4-36 for the procedure for ac- cessing the meat probe jack.
  • Page 78: Blower Speed Resistor

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. BLOWER SPEED RESISTOR OVEN SHUTDOWN THERMAL CUTOFF (TCO) Refer to page 4-36 for the procedure for ac- cessing the blower speed resistor.
  • Page 79: Hidden Bake Element

    WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. HIDDEN BAKE ELEMENT Refer to page 4-38 for the procedure for ac- cessing the hidden bake element. NOTE: The hidden bake element will be tested at the appliance manager board (see page 4-18).
  • Page 80 — NOTES — 5-16...
  • Page 81: Diagnostics & Troubleshooting

    DIAGNOSTICS & TROUBLESHOOTING WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. DIAGNOSTICS IMPORTANT • Is oven in “Sabbath Mode”? If so “SAB” will Electrostatic Discharge (ESD) appear in the digital display.
  • Page 82: Failure/Error Display Codes

    Screen 1: PRECAUTIONS TO BE A. Main clock hours display shows latch state OBSERVED BEFORE AND in first display position, and door state in DURING SERVICING TO AVOID second position. POSSIBLE EXPOSURE TO B. Main clock minutes display show the model EXCESSIVE MICROWAVE ENERGY select state associated with control system.
  • Page 83 WARNING Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock. FAILURE ERROR FAILURE ERROR (Leftmost (Rightmost MESSAGE/DESCRIPTION (Leftmost (Rightmost MESSAGE/DESCRIPTION 2 Clock 2 Clock 2 Clock 2 Clock SUGGESTED CORRECTIVE ACTION PROCEDURE...
  • Page 84 FAILURE ERROR FAILURE ERROR (Leftmost (Rightmost MESSAGE/DESCRIPTION (Leftmost (Rightmost MESSAGE/DESCRIPTION 2 Clock 2 Clock 2 Clock 2 Clock SUGGESTED CORRECTIVE ACTION PROCEDURE SUGGESTED CORRECTIVE ACTION PROCEDURE Digits) Digits) Digits) Digits) PROCEDURE: There are three sensors for the microwave. They are the Cavity H.
  • Page 85 FAILURE ERROR FAILURE ERROR (Leftmost (Rightmost MESSAGE/DESCRIPTION (Leftmost (Rightmost MESSAGE/DESCRIPTION 2 Clock 2 Clock 2 Clock 2 Clock SUGGESTED CORRECTIVE ACTION PROCEDURE SUGGESTED CORRECTIVE ACTION PROCEDURE Digits) Digits) Digits) Digits) TO VERIFY DOOR LATCH SWITCH/MOTOR ASSEMBLY: UPPER OVEN UI IS NOT DISPLAYING THE AM SOFTWARE AND EEPROM VERSIONS A.
  • Page 86 FAILURE ERROR FAILURE ERROR (Leftmost (Rightmost MESSAGE/DESCRIPTION (Leftmost (Rightmost MESSAGE/DESCRIPTION 2 Clock 2 Clock 2 Clock 2 Clock SUGGESTED CORRECTIVE ACTION PROCEDURE SUGGESTED CORRECTIVE ACTION PROCEDURE Digits) Digits) Digits) Digits) USER INTERFACE/ COOK oven OVER TEMPERATURE APPLIANCE MANAGER MISMATCH CLEAN oven OVER TEMPERATURE PROCEDURE: Before proceeding, press OFF, OFF, START to enter the Diagnostic PROCEDURE: Before proceeding, press OFF, OFF, START to enter the Diagnostic mode.
  • Page 87: F To C Conversion

    FAHRENHEIT (° F) TO KEYPADS CELSIUS (° C) CONVERSION Model select state The temperature is preset in Fahrenheit, how- Door switch state ever it can be changed to Celsius. Latch switch state To Change: Press OPTIONS and then “1” to toggle temperature between Fahrenheit and Celsius settings.
  • Page 88: Relay Logic - Microwave Oven

    MW OVEN POWER OUTPUT TEST RELAY LOGIC - LOWER OVEN The power output of the magnetron can be mea- sured by the following tap water temperature rise test. MODES NOTES: • Be sure oven cavity is clean and cool (not BAKE PRE-B used recently).
  • Page 89: Wiring Diagram & Strip Circuits

    WIRING DIAGRAM & STRIP CIRCUITS WIRING DIAGRAM SYMBOLS GROUND (CHASSIS) THERMAL CUTOFF RELAY COIL (NON-RESETTABLE) PLUG WITH FEMALE RELAY THERMAL CUTOFF CONNECTOR CONTACTS (MANUALLY RESETTABLE) RECEPTACLE WITH NOTES: HEATING MALE CONNECTOR ELEMENT RESISTOR When replacing the electronic control, be sure to program the •...
  • Page 90: Strip Circuits

    STRIP CIRCUITS The following individual circuits are for use in diagnosis, and are shown in the ON position. Do not continue with the diagnosis of the appliance if a fuse is blown, a circuit breaker is tripped, or if there is less than a 240 volt power supply at the wall outlet. BAKE PREHEAT B - BAKE PREHEAT A - BAKE SS N L2 BAKE 200W...
  • Page 91 BREAD PROOF PREHEAT B - BREAD PROOF PREHEAT A - BREAD PROOF SS OVEN SHUTDOWN BAKE 200W T3-3 THERMAL CUTOFF T4-3 (NON-RESETTABLE) T1-1 (105°C) (221°F) T1-2 BLOWER P8-4 P8-1 BLOWER SPEED RESISTOR CONVECT BAKE PREHEAT A - CONVECT BAKE SS BAKE 200W T3-3 OVEN...
  • Page 92 CLEAN P1-5 DOOR SWITCH (ON LATCH ASSY) P1-7 P1-4 N L2 LATCH SWITCH BAKE 2000W T3-3 (OPERATED BY MOTOR) OVEN OUT BROIL 1450W T4-3 T3-1 SHUTDOWN T4-4 IN BROIL 1800W THERMAL T3-4 CUTOFF T1-1 (NON-RESETTABLE) T1-2 T2-1 (105°C) (221°F) P9-5 T2-2 P8-1 P9-2...
  • Page 93 MWO CRISP MW APPLIANCE MW APPLIANCE CAVITY LINE FILTER L1 LINE FILTER L1 MANAGER MONITOR MANAGER MW LIGHT LINE 20A THERMOSTAT 20A FUSE TRANSFORMER FUSE P1-2 P2-5 P1-1 P2-6 HALOGEN LIGHT P2-4 P2-3 CONV. FAN MOTOR P3-1 P2-1 P2-2 TURNTABLE PRIMARY INTERLOCK SWITCH 4903...
  • Page 94 — NOTES —...
  • Page 95: Product Specifications

    WARRANTY INFORMATION SOURCES IN THE UNITED STATES: FOR PRODUCT SPECIFICATIONS AND WARRANTY INFORMATION CALL: FOR WHIRLPOOL PRODUCTS: 1-800-253-1301 FOR KITCHENAID PRODUCTS: 1-800-422-1230 FOR ROPER PRODUCTS: 1-800-447-6737 FOR TECHNICAL ASSISTANCE WHILE AT THE CUSTOMER’S HOME CALL: THE TECHNICAL ASSISTANCE LINE: 1-800-832-7174...

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