CONSUMER SERVICES TECHNICAL EDUCATION GROUP PRESENTS L-61 Washers and Dryers with Fifth Generation Solid State Electronic Control Systems Fabric/Cycles Time Heavy Regular Perm Press Delicate Hand Wash Soak 14 12 Heavy 10 8 Normal 6 4 Light Load Size Temperature Wash/Rinse Hot/Warm Hot/Cold Warm/Warm Warm/Cold Cold/Cold Extra Large Medium Small Options Super Wash Extra Rinse Rinse & Spin-High Rinse & Spin-Low Spin Only - High Status Fill/Wash Rinse Final Spin LockOut Cancel Delay Hours On Select
INTRODUCTION This Job Aid, “Washers and Dryers with Fifth Generation Solid State Electronic Controls,” L-61, Part No. 4321848 provides specific instruction for servicing the control system of Whirlpool-built three speed direct drive washers and gas and electric dryers equipped with fifth generation fully solid state electronic controls. These controls were introduced on Whirlpool washer model LSE9355BZO and dryer model LE/GE9848BZO and KitchenAid washer model KAWE977BWHO and dryer model KE/ GYW977BWHO.
TABLE OF CONTENTS INTRODUCTION III TABLE OF CONTENTS IV SECTION 1 - EQUIPMENT AND SAFETY 1 SECTION 2 - INSTALLATION CONSIDERATIONS 3 SECTION 3 - THEORY OF OPERATION 7 Automatic Electronic Three Speed Direct Drive Washers 7 Electronic Electric and Gas Dryers 9 SECTION 4 - SERVICING WASHERS AND DRYERS Automatic Electronic Three Speed Direct Drive Washers 11 11 Component Location and Access 11 Testing and Diagnosis 12 Servicing Procedures 18 Solid State Electronic Controls 18 Water Leve
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>> View Section 1 of the Video Tape Section 1 EQUIPMENT AND SAFETY EQUIPMENT All tests/checks should be made with a VOM or DVM having a sensativity of 20,000 ohms per volt DC or greater. Voltage check should be made with wires connected. (Figure 1) Fig. 1 SAFETY ! WARNING s ELECTRICAL SHOCK HAZARD Disconnect the unit from household electric supply before servicing. Failure to do so could result in serious injury or death.
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>> View Section 2 of the Video Tape Section 2 INSTALLATION CONSIDERATIONS The most common cause of electronic control failure are the result of issues related to proper installation.
INLET HOSES The rubber washers and inlet hoses on washers with 5th Generation Electronic Controls have been installed in the factory. They will be found tucked into a cavity immediately below the inlet valve at the back of the washer. (Fig. 3) Some effort will be required to separate the free ends of the hoses from the plastic retainer inside the washer.
Section 2 ( . ) CONFIRMATION OF UNDERSTANDING EXERCISES 1. If a washer or dryer equipped with 5th Generation Electronic Controls fails to operate properly, what should be the first step in servicing the appliance? o a. Replace the Electronic Control Assembly o b. Make sure the appliance is plugged into a live receptacle. o c. Check the individual components on the printed circuit board. o d. Call for technical assistance. 2. If the washer or dryer is in LOCKOUT: o a.
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>> View Section 3 of the Video Tape Section 3 THEORY OF OPERATION Automatic Electronic Three Speed Direct Drive Washers FILL 1. The washer will fill automatically with warm water for approximately 90 seconds through the detergent dispenser when the START pad is touched. The STATUS display will indicate Fill/Wash. 2. The washer will then switch to regular fill through the Hot and Cold water inlet valves. The water will enter the washer through the water inlet vacuum brake at the rear of the tub.
DRAIN NOTE: The Start Capacitor and Start Winding of the Drive Motor are energized from P9 during the Drain Cycle. NOTE: The Drain Cycle will be interupted when the washer lid is opened. The drain cycle is activated by applying 120VAC directly to the high speed winding of the drive motor between Pin P7 (Spin) and Pin P8 (Ag HI) to operate the drive motor through the high speed winding in the reverse direction. (Fig.
Electronic Gas and Electric Dryers AUTOMATIC DRY 1. When any of the Automatic options are selected the dryer will run and the LED indicator above the AUTOMATIC options will be lit along with the LED indicator for the specific automatic option chosen. 2. The sensor on the back of the dryer drum will sense the amount of moisture in the load. 3. Temperatures are sensed by a thermistor. The thermistor’s resistance will vary between 1000 ohms and 15,000 ohms depending on the temperature. 4.
( . ) Section 3 - CONFIRMATION OF UNDERSTANDING EXERCISES 1. The first portion of the washer FILL function is: o a. A high pressure blast of hot water to clear the lines. o b. A 90 second fill of hot and cold water through the detergent dispenser. o c. A 90 second pause. o d. None of the above. 2. The agitate speeds of the washer are: o a. High - 180 SPM (Strokes per Minute), Medium - 120 SPM, Low - 80 SPM o b. High - 180 RPM (Revolutions per Minute), Medium - 120 RPM, Low - 80 RPM o c.
>> View Section 4 of the Video Tape Section 4 SERVICING WASHERS AND DRYERS Automatic Electronic Three Speed Direct Drive Washers COMPONENT LOCATION AND ACCESS Solid State Electronic Control Assembly The Solid State Electronic Control Assembly and Water level Transducer are located inside the console. To access these components: 1. Remove the two philips head screws located at the lower left and right sides of the console. 2. Tilt the console into the service position.
TESTING AND DIAGNOSIS STARTING TEST MODE 1. Press the following “Select” pads in sequence. (Entire sequence must be done within 10 seconds) (Fig.
LID AND SPIN TEST 1. Make sure the washer lid is closed before starting test. 2. Press “SELECT” pad under Temperature four times to turn off all water valves. (NOTE: Display will show “Small” indicator light.) Lid Switch Test 1. Press the “SELECT” pad under TIME unitl the “4” indicator LED is lit. the washer should start to spin. 2. If the washer is not spinning, open and close the lid to reset the Neutral Drain Mechanism. If the washer is still not spinning go to step 4. 3.
d. If the washer still does not spin, leave the washer plugged in and check for 120VAC from connectors P14 (W-OR) to P7 (W-BK) during step 1. e. If 120VAC is present, check motor. f. If 120VAC is not present, replace the electronic control assembly. Medium Speed Spin Test This test should be conducted with the lid switch closed. 1. Press the “SELECT” pad under TIME until the "6" indicator LED is lit. The washer should start to spin. 2. Medium speed spin is functioning properly if the washer is spinning.
d. If the washer still does not spin, leave the washer plugged in and check for 120VAC from connectors P8 (BU) to P7 (W-BK) during step 1. e. If 120VAC is present, check motor. f. If 120VAC is not present, replace the electronic control assembly. DRAIN TEST This test should be conducted with the lid switch closed. 1. Press the “SELECT” pad under OPTIONS. (The “Small” and “Warm/Warm” indicator LEDs should be lit.) 2.
b. Open the console and inspect for loose connections. Disconnect and reconnect all wires from the electronic control assembly. c. Close the console, plug the washer into the household power supply and repeat steps 1 & 2. d. If the washer still does not agitate, open the console and check for 120VAC from connectors P8 (BU) and P10 (W) during step 1. e. If 120VAC is present, check motor. f. If 120VAC is not present, replace the electronic control assembly. Medium Speed Agitate Test 1.
d. If the washer still does not agitate, open the console and check for 120VAC from connectors P14 (W-O) and P7 (W-BK) during step 1. e. If 120VAC is present, check motor. f. If 120VAC is not present, replace the electronic control assembly. FILL AND DISPENSE TEST Press the “SELECT” pad under STATUS. (The “Small” and “Warm/Warm” indicator LEDs should be lit.) No Fill and/or No Dispense If the washer is not filling from all three valves: 1. Unplug the washer from 120VAC household power supply. 2.
SERVICING PROCEDURES SOLID STATE ELECTRONIC CONTROLS NOTE: All diagnostic tests must be performed before any attempt is made to remove the electronic control assembly. Control Assembly Removal and Replacement Refer to Figure 14 for these procedures. 1. Open the console to the service position. The User Cards Holder should be removed first to avoid damage. 2. Unplug all five connectors from the control assembly.
Electronic Electric and Gas Dryers COMPONENT LOCATION AND ACCESS Solid State Electronic Control Assembly The Solid State Electronic Control Assembly is located inside the console. To access this component: 1. Remove the two philips head screws located at the lower left and right sides of the console. 2. Slide the console forward onto a protective mat and remove the console back panel. All testing necessary for trouble shooting and diagnostic purposes can be perfomed with the console in the service position.
TESTING AND DIAGNOSIS Diagnostics The following problems can be diagnosed by observing the indicator LEDs on the control panel. Power Failure When the 3 STATUS LEDs are flashing: Drying + Cool Down + Finish Guard, a power failure may have occurred during a cycle. • The flashing LEDs can be turned off by pressing “ON/SELECT” or “CANCEL”. Open/Short Thermistor When the TIMED LED is flashing, the thermistor or the wiring to the thermistor is open or shorted.
a. If the motor does not start and there is an “Invalid Tone”, check the door switch. (D to D1) b. If the motor does not start and the Drying LED lights up, check the motor and thermal fuse. c. If the motor still does not start, check the motor relay (BK to BU) d. If 120VAC is present and the harness connections are OK, replace the electronic control assembly.
2. Select Automatic - Less Dry and press “START”. 3. If the motor will not stop after 16 seconds, check sensor strip (Y-R to G-Y). a. If 0 ohms with no load, check for a short in the sensor or the Y-R wire. b. If infinite ohms (Y-R to G-Y should be infinite with no load,) replace the electronic control assembly. If the dryer shuts off too soon in an “Automatic” cycle, check the following: - Harness/Connection Sensor Strip Control Assembly 1. Short the sensor strip together and press “ON/SELECT”. 2.
Thermal Cut-Off Fifth generation electronic electic dryers are equipped with a “one-shot” thermal cut-off. If the dryer does not heat and there are 240VAC to the dryer, disconnect the dryer from the household electrical source and check the thermal cut-off for continuity. If continuity is open, the thermal cut-off has failed and it must be replaced. (Fig.
( . ) Section 4 - CONFIRMATION OF UNDERSTANDING EXERCISES 1. To enter the test mode on 5th generation washers: o a. Press the ON/SELECT button four times. o b. Press TIME Select + TEMP Select + TIME Select + TEMP Select within 10 seconds. o c. Press the ON/SELECT and the CANCEL buttons twice. o d. Unplug the washer and wait 30 seconds before plugging it back in. 2. To enter the test mode on 5th generation dryers: o a. Press the ON/SELECT button four times. o b.
>> View Section 5 of the Video Tape Section 5 TECH TIPS TESTING PROCEDURE FOR WATER LEVEL TRANSDUCER Washers equipped with 5th Generatiuon Electronic Controls use a solid state electronic pressure transducer to convert air pressure created in the pressure dome to a low voltage square wave signal to determine water level. The microcomputer on the electronic control board translates the varying frequency of the square wave into inches of water in the tub.
WIRING DIAGRAMS THREE SPEED AUTOMATIC WASHER 26
AUTOMATIC DRYER ELECTRIC GAS CONFIRMATION OF UNDERSTANDING EXERCISES ANSWER SHEET SECTION 2 SECTION 3 SECTION 4 1. 2. 3. 4. 5. 1. 2. 3. 4. 1. 2. 3. 4.
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