Table of Contents
Related Manuals for Whirlpool KM-24
Summary of Contents for Whirlpool KM-24
- Page 1 KM-24 MICROHOOD COMBINATION JOB AID Part No. 4322462...
- Page 2 The objective of this Job Aid is to have the experienced appliance techni cian become familiar with the operation and service of the Whirlpool MCH Oven. It is designed as reference material and is not a replacement for basic training.
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Page 3: Table Of Contents
TABLE OF CONTENTS Important Safety Instructions ..................Page iv MicroHood Model Features ....................Page 1 The Mounting Bracket ...................... Page 2 The Rear Mounting Bracket Latch ................... Page 3 Blower Venting Positions ....................Page 4 The Oven Component Locations ..................Page 5 The Humidity Sensor ...................... -
Page 4: Important Safety Instructions
IMPORTANT SAFETY INSTRUCTIONS WARNING TO SERVICE TECHNICIANS To avoid possible exposure to microwave radiation or energy, visually check the oven for damage to the door and door seal before operating any oven. Use a microwave survey meter to check the amount of leakage before servicing. -
Page 5: Precautions To Avoid Possible Exposure To Excessive Microwave Energy
Whirlpool microwave ovens have a monitoring system designed to assure proper operation of the safety interlock systems. The interlock monitor switch will immediately cause the oven fuse to blow if the door is opened and the primary door interlock switch and/or the secondary interlock switch contacts fail in a closed position. - Page 6 WARNING CAUTION • Disconnect the oven from electrical sup- • High voltages are present during the cook ply before servicing. Failure to do so cycle. Extreme caution should be ob- could result in electrical shock or death. served at all times. •...
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Page 7: Microhood Model Features
MICROHOOD MODEL FEATURES (1998 Production) MODEL MH6140XF (VALUE MODEL) • 1.4 Cubic Feet • 950 Watts • Sunken Turntable • Electronic Controls & Clock • Five (5) EZ-Choice™ Keypads • Available in Black & White MODEL MH7140XF (TRADE-UP MODEL) • 1000 Watts •... -
Page 8: The Mounting Bracket
MOUNTING BRACKET The mounting bracket for the MicroHood Oven (see the illustration at the bottom of the page) should be installed as shown in the “Installation Instructions” that were supplied with the unit. These instructions include installing: • Molly bolts in each of the four corners of the bracket. •... -
Page 9: The Rear Mounting Bracket Latch
THE REAR MOUNTING BRACKET LATCH The Rear Mounting Bracket Latch is engaged To access the latch arm: when the microwave oven in mounted to the Remove the two vent cover screws. rear mounting bracket. The bracket clip is in– Tilt the top of the vent cover forward and serted into the rear oven panel, and is held by remove it. -
Page 10: Blower Venting Positions
BLOWER VENTING POSITIONS Recirculating Air Toward Front Of Unit Blower Air Inlet Rear Venting Blower Air Inlet Toward Rear Of Unit Top Venting Toward Top Of Unit Blower Air Inlet NOTE: All microwave ovens are shipped with the venting toward the top of the unit. - 4 -... -
Page 11: The Oven Component Locations
THE OVEN COMPONENT LOCATIONS STIRRER HUMIDITY HOOD FAN MOTOR HIGH LIMIT SENSOR FAN MOTOR THERMOSTAT H.V. CAPACITOR OVEN CAVITY LAMP DIODE SECONDARY INTERLOCK SWITCH MAGNETRON THERMOSTAT TURNTABLE MOTOR BLOWER MOTOR CAPACITOR COOKTOP LAMPS HIGH VOLTAGE TRANSFORMER LINE FUSE HOOD FAN THERMOSTAT MAGNETRON COOLING FAN MOTOR PRIARY... -
Page 12: The Humidity Sensor
THE HUMIDITY SENSOR The Humidity Sensor is used during the “Sen- conditions, due to the cooking process within sor Cook” operation of the oven. It is mounted the oven cavity, causes a difference in poten- inside a cutout area on the left side of the top tial between these two circuits. -
Page 13: The High Limit Thermostat
THE HIGH LIMIT THERMOSTAT The High Limit Thermostat is normally-closed, To access the thermostat: and will open at a set temperature to disable Remove the top cover screws. the oven. The thermostat will reset itself when Lift the left side of the cover and slide the the temperature drops below its “trip”... -
Page 14: The Hood Fan Motor
THE HOOD FAN MOTOR The hood fan motor removes smoke and odors To test the hood fan motor: from the cooking area through recirculation or Set the ohmmeter to R x 10. outside venting. The exhaust fan motor is Touch the ohmmeter leads to the follow- located at the right side of the top cover. -
Page 15: The Magnetron Cooling Fan Motor
THE MAGNETRON COOLING FAN MOTOR The Magnetron Cooling Fan Motor cools the Disconnect the two wires from the termi- magnetron during operation of the microwave nals. oven. Remove the two phillips screws from the To access the motor: motor. Remove the cabinet. To test the fan motor: Remove the right front side panel. -
Page 16: The Hood Fan Thermostat & Blower Motor Capacitor
THE HOOD FAN THERMOSTAT & BLOWER MOTOR CAPACITOR The Hood Fan Thermostat turns on the motor To remove the blower motor capacitor, when the magnetron temperature reaches a remove the screw and disconnect the two preset level. The Blower Motor Capacitor keeps wires from the terminals. -
Page 17: Touch Keypad & Microcomputer Board Test
TOUCH KEYPAD & MICROCOMPUTER BOARD TEST The microhood combination (MHC) is provided with a self-diagnosis routine that can be accessed through the touch keypad. To initiate this routine, perform the following steps: Hold the CANCEL pad down while open- Key Name In Circuit Relay Display Position ing the door. -
Page 18: Wiring Diagram
WIRING DIAGRAM NOTES: 1. Oven OFF 2. Door OPEN - 12 -... -
Page 19: Strip Circuits
STRIP CIRCUITS LOW VOLTAGE TO ELECTRONIC CONTROL BOARD 120-VOLTS TO OVEN COMPONENTS - 13 -... - Page 20 120-VOLTS TO EXHAUST FAN MOTOR (HIGH SPEED) HOOD FAN MOTOR 120-VOLTS TO EXHAUST FAN MOTOR (LOW SPEED) HOOD FAN MOTOR 120-VOLTS TO OVEN LIGHT - 14 -...
- Page 21 120-VOLTS TO OVEN LIGHT (ACTIVATES WHEN DOOR OPENS) 120-VOLTS TO EXHAUST FAN THERMOSTAT & FAN MOTOR HOOD FAN HOOD FAN THERMOSTAT MOTOR 120-VOLTS TO COOKTOP LIGHTS (NIGHTLIGHT MODE) - 15 -...
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Page 22: Primary, Monitor, & Secondary Switch Checkout Procedure
PRIMARY, MONITOR, & SECONDARY SWITCH CHECKOUT PROCEDURE Door Switch Test Procedure Door Open Closed 1. Disconnect wires from the primary interlock switch. Primary Interlock Continuity 2. Measure from COM terminal (white continuity wires) to N.O. terminal (blue wires). 1. Disconnect wires from the secondary interlock switch.