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Basicelectricity3

Jesus A Aular Y, profile picture
Jesus A Aular Y

This document provides information about reading timer sequence charts and wiring diagrams for home appliances. It includes a sample timer sequence chart and wiring diagram for a washing machine. The summary explains: - Timer sequence charts show the operation of timer switches and how they control machine functions through different cycles. Wiring diagrams show the electrical components and circuits. - Comparing the two allows you to diagnose electrical and mechanical issues by seeing which components are activated at each step. - It walks through using the charts and diagram to troubleshoot a washing machine that is not filling properly, showing how to methodically check the circuits and components involved in the fill function.

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STUDY COURSE for Home Appliances HOW TO READ: • TIMER SEQUENCE CHARTS (ESTERLINE) • WIRING DIAGRAMS BASIC ELECTRICITY 11 12 9 13 4 6 14 10 7 8 19 23 16 3 5 2 1 sw. 2 2 WASH FILL WASH 4 4 PAUSE DRAIN 6 6 8 8 WASH FILL WASH 10 10 BLEACH 12 12 SUDS STORE DRAIN 14 14 SPRAY 16 16 RINSE FILL RINSE 18 18 DRAIN SPRAY 20 20 SPIN 22 22 24 24 TERMSWITCHFUNCT. MACHINE FUNCTION TERMINAL CODES TIMER SWITCH FUNCTIONSTIMER SWITCH NUMBERS REGULAR/HEAVYOR NORMAL SUPER WASH CYCLE OFF RINSE FILL SPIN BRWASHFILL Y-RRINSEFILL LBUSUDSRET. G-BKSPRAY O-BKRINSECOND. ORMED.MOTOR GYSPIN G-BKDEEPFILL YAGITATE LBUSUDSSTORE BU-OAGIT.MOTOR R-WSPINMOTOR TTIMER BU-GBLEACH BUHI-MOTOR TMBY-PASS --TOOLEDCAM W-GMASTER CHART Module 3 LIT 787741 Rev. B TIMER FUNCTION SWITCH CLOSED SWITCH OPEN TERMINAL CODE SWITCH NUMBER
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All rights reserved. No portion of this book may be reproduced in any form without written permission from WHIRLPOOL CORPORATION. © 1989, 1993, 2000 WHIRLPOOL CORPORATION WHIRLPOOL CORPORATION does not assume any responsibility or any liability in connection with the use of this manual. ® The trademarks WHIRLPOOL , , , and FSP are registered trademarks of Whirlpool Corporation.
INTRODUCTION The material presented in this module is intended to provide you with an understanding of the fundamentals of electricity as applied to major appliances. Major appliances have become more sophisticated, taking them out of the screwdriver and pliers category. Their electrical circuits include several different types of automatic controls, switches, heaters, valves, etc.. Semiconductors, solid-state controls, and other components usually associated with radio and television electronic circuits, are being engineered into automatic washers, dryers, dishwashers, and refrigerators. The appliance technician is emerging into a professional status of his own. He must prepare himself now to be able to perform his duties today as well as to retain his professionalism in the future. No longer is on-the-job training sufficient to prepare technicians for the complicated procedures required for todays sophisticated appliances. This training can best be obtained through organized classroom study and application. However, much of the knowledge necessary to service todays appliances can be obtained through study courses. Completion of this and other courses will provide you with sufficient understanding of appliances and their operation to enable you to do minor service. It will also serve as a valuable stepping stone to more advanced study and on-the-job training to improve your servicing skills. Information contained in this module is used on WHIRLPOOL® appliances. 1
TABLE of CONTENTS PAGE CHAPTER 1 ..............................................................................................3 Timer Sequence Charts (Esterline) CHAPTER 2 ..............................................................................................7 Wiring Diagrams *TEST ............................................................See Test Book LIT787743 *NOTE: We recommend taking the TEST for MODULE 3, right after studying it. 2
CHAPTER 1 TIMER SEQUENCE GHARTS (ESTERLINE) 3 Page 5 represents a sample timer sequence chart. Page 6 represents a sample wiring diagram. This detailed chart shows how the timer motor and timer switch operation control machine functions. When the timer switch sequence chart information is com- pared to the wiring diagram, electrical and mechani- cal diagnosis can be accomplished. The top horizontal row of numbers across the top of the timer sequence chart represents timer SWITCH NUMBERS. These numbers will not be found on the actual timer. They are merely guides to be used to relate between the timer sequence chart and the wiring diagram. The timer switch functions are shown directly below the timer switch numbers. These relate to the function controlled by that switch contact. The letters below the timer switch functions, such as LBU, GY, G-BK, O-BK, etc., represent the actual timer terminal markings and wiring color code. The vertical column at the right of the timer sequence chart shows the cycles of machine operation. As you can see, in this particular chart we are only showing three Cycles — NORMAL or REGULAR/HEAVY, GENTLE and PERMANENT PRESS, as well as the special cycle — SUPER WASH. To the right of each cycle are the machine functions for that cycle. The columns under the machine function heading give the basic operation on the left, and give the supporting functions on the right, for each timer step. Even numbered timer steps are shown to the left of thewashcycles.Theoddnumberstepsarenotshown, to avoid confusion and an overcrowded appearance. Each timer space represents a definite period of time. Closedswitchesforthecomponentsofeachtimerstep are represented by the HEAVY VERTICAL BARS in the timer switch sequence chart. The timer switch sequence chart explains the when, what, why, and how of machine function at any selected point of operation. In order to properly diagnose a problem, the electrical circuitry and the wiring diagram, attached to the product must be thoroughly understood. Let’s first study each part of the wiring diagram. On page 6 the symbol shown at the top of the page by the letters BK, G, and W represents the line cord attachment plug. The line marked W extends down the right side of the diagram and is known as the neutral side of the electrical system. Note that this line connects directly to one side of each energy converting (electrical to mechanical) component of theautomaticwasher,withoutanycontrollingswitch. The line shown as BK extends to the left and is known as the hot side of the electrical system. It provides a circuit to the master switch (No. 1) and to all the other electrically operated components through the timer switches, and/or the water level and temperature switches. Theheavyblacklinesconnectedtonumberedswitches represent circuits and switches within the timer assembly. The pull-on, push-off timer knob switch controls all circuits. This switch will start the automatic washer operation when the timer knob is pulled out, and will stop the operation when it is pushed in. All timer switches are numbered to correspond with the timer sequence chart. Any given machine compo- nent is always controlled by the same timer switch number, regardless of the model. For example: Five (5) is always reserved for high motor speed; seven (7) is always reserved for agitation, etc. Wiring harnesses are color coded, to match the color coded lettering imprinted on the wires of the timer terminal connections. Any given automatic washer component always uses the same wiring harness color and color code lettering, regardless of model. Example: BU (Blue) is always used for high motor speed; Y (Yellow) is always used for agitation. Any given component is always shown at the same position on the wiring diagram. The water tempera- ture switch is shown within dashed lines, near the bottom of the wiring chart. The lettering at the right of the switch contacts indicates present contacts for various combinations of wash and rinse water tem- peratureselections.ThefirstletterrepresentsWASH water temperature, while the second letter identifies RINSE water temperature.
4 Sincestudyingandlearninginformationhasnovalue until it is applied, let’s follow this step-by-step proce- dure to diagnose a machine malfunction. For an example, say the washer was set in the GENTLE cycle with the water temperature switch set at HOT WASH and COLD RINSE, and that the washer will not FILL. A rule is to always check the easy and obvious first. Is there power to the machine? Be sure the machines power cord is plugged into a live wall receptacle. Next, be sure the water faucets are turned On! Also, make sure the timer dial indication coincides with the timer function. Let’s assume in our example that, having completed all the normal examinations, the machine still does not FILL. Turn to the wiring diagram and timer sequence chart. By using this information, you will be able to determine which circuits and components are affected in the appliances electrical system at any given time. The wiring chart is easy to follow when a step-by-step checking sequence is used. Fill, in the GENTLE cycle, takes place in timer Step 26. Let’s start by drawing a line horizontally through timer Step 26 on the timer sequence chart and note the closed circuits. The closed switches are switch no. 1 (master), no. 16 (timer), no. 19 (agitate motor), no. 7 (agitate), no. 10 (deep fill) and switch no. 11 (wash fill). Now close these switches on the wiring diagram on page 6. As you can see by the heavy line, the electric- ity on the “BK” side of the line flows through switch no. 1, the water level switch (empty), temperature switch and the mixing valve and then back through the “W” side of the line, completing a circuit. Since our problem is “No Fill,” the first thing to do is turn your timer dial to the start of the GENTLE cycle. Did the light, if used, turn on? If so, timer switch no. 1 is ok. Now turn your timer dial to SPIN and pull the knob out. Did your automatic washer start to spin? If so, the water level switch is ok. Now you will have to check out timer switches no. 10 and no. 11, the temperature switch and the mixing valve to find and correct the problem. When the correct water level is reached, the switch trips from “P” (empty) to “T” (full). With the water level switch tripping from “P” to “T,” there is no electricity through switches no. 10 and no. 11, temperature switch and the mixing valve. Electricityflowsfromthe“BK”sideofthelinethrough switch no. 1, the water level switch (full), agitate solenoid, speed switch/drive motor and timer motor all at the same time, completing a circuit through the “W” side of the line. You can also see when switch no. 1 is closed. This completes a circuit through the ballast and fluores- cent lamp, no matter what the water level switch is doing.
5 SAMPLE TIMER SEQUENCE CHART (ESTERLINE) 11 12 9 13 4 6 14 10 7 8 19 23 16 3 5 2 1 sw. 2 2 WASH FILL WASH 4 4 PAUSE DRAIN 6 6 8 8 WASH FILL WASH 10 10 BLEACH 12 12 SUDS STORE DRAIN 14 14 SPRAY 16 16 RINSE FILL RINSE 18 18 DRAIN SPRAY 20 20 SPIN 22 22 24 24 26 26 WASH FILL WASH 28 28 SUDS STORE DRAIN 30 30 SPRAY SPIN RINSE FILL 32 32 RINSE DRAIN 34 34 36 36 OFF 38 38 40 40 WASH FILL WASH 42 42 PAUSE DRAIN 44 44 46 46 WASH FILL WASH TERMSWITCHFUNCT. MACHINE FUNCTION TERMINAL CODES TIMER SWITCH FUNCTIONSTIMER SWITCH NUMBERS REGULAR/HEAVYOR NORMAL PERMANENT PRESS GENTLE SUPER WASH SUPER WASH CYCLE TIMER STEPS MACHINE FUNCTION (EMPTY) MACHINE FUNCTION (FULL) TIMER STEPS RINSE FILL SPIN OFF RINSE FILL SPIN SWITCH OPENINGS AND CLOSINGS BRWASHFILL Y-RRINSEFILL LBUSUDSRET. G-BKSPRAY O-BKRINSECOND. ORMED.MOTOR GYSPIN G-BKDEEPFILL YAGITATE LBUSUDSSTORE BU-OAGIT.MOTOR R-WSPINMOTOR TTIMER BU-GBLEACH BUHI-MOTOR TMBY-PASS --TOOLEDCAM W-GMASTER TIMERSWITCHSEQUENCECHART CYCLE
11 12 9 13 4 6 14 10 7 8 19 23 16 3 5 2 1 sw. 2 2 WASH FILL WASH 4 4 PAUSE DRAIN 6 6 8 8 WASH FILL WASH 10 10 BLEACH 12 12 SUDS STORE DRAIN 14 14 SPRAY 16 16 RINSE FILL RINSE 18 18 DRAIN SPRAY 20 20 SPIN TERMSWITCHFUNCT. MACHINE FUNCTION TERMINAL CODES TIMER SWITCH FUNCTIONSTIMER SWITCH NUMBERS REGULAR/HEAVYOR NORMAL SUPER WASH CYCLE RINSE FILL SPIN BRWASHFILL Y-RRINSEFILL LBUSUDSRET. G-BKSPRAY O-BKRINSECOND. ORMED.MOTOR GYSPIN G-BKDEEPFILL YAGITATE LBUSUDSSTORE BU-OAGIT.MOTOR R-WSPINMOTOR TTIMER BU-GBLEACH BUHI-MOTOR TMBY-PASS --TOOLEDCAM W-GMASTER 6 SAMPLE WIRING DIAGRAM 16 (OPEN) (OPEN) (OPEN) (OPEN) (OPEN) (OPEN) (OPEN) (OPEN) (OPEN) 14 13 12 10 11 8 9 (CLOSED) (CLOSED) (CLOSED) (CLOSED) (CLOSED) 1 2 3 4 5 6 7 23 19 (OPEN)(CLOSED) CABINET GROUND BK G W STARTER BALLAST W W RR FLUORESCENT LAMP TIMER MOTOR TM TM-W BLEACH SOLENOID FABRIC COND. SOLENOID BU-G O-BK W-G BK V PULL-ON PUSH-OFF TIMER KNOB SW. SPEED CONTROL SWITCH BUBU BU-O HI DRIVE MOTOR MED. OR R-W LO GY-P AGITATE SOLENOID Y SUDS VALVE (IF USED)LBU (IF USED) T FULL EMPTY WATER LEVEL SWITCH G-Y LID SWITCH SPIN SOLENOID G-BK BR Y-R W BR-R HOT VALVE R COLD VALVE TEMP. SW. (CLOSED IN POSITIONS NOTED) HW WC CC WW WW HW WC WW HC B S
CHAPTER 2 WIRING DIAGRAMS In this chapter each page is a typical wiring diagram. You will find the response on the back of the page. Let’s take a look at a wiring diagram for an automatic washer. Note switch number 1 on the diagram. It is first in line and is the master switch. No circuits are energized when the dial is in the off position. Turn the dial to any operating position and one circuit is energized even before you operate the push-pull switch by pulling the knob. WITH YOUR PENCIL, CLOSE SWITCH 1 AND DRAW A WAVY LINE THROUGH THE ENERGIZED CIRCUIT. 7 CABINET GROUND BK G W STARTER BALLAST W W RR FLUORESCENT LAMP TIMER MOTOR TM TM-W FABRIC COND. SOLENOID BU-G O-BK W-G BK V PULL-ON PUSH-OFF TIMER KNOB SW. SPEED CONTROL SWITCH BUBU BU-O HI DRIVE MOTOR MED. OR R-W LO GY-P AGITATE SOLENOID Y SUDS VALVE (IF USED)LBU (IF USED) T FULL EMPTY WATER LEVEL SWITCH SWITCH OPEN G-BK BR BR-R HOT VALVETEMP. SW. (CLOSED IN POSITIONS NOTED) HW WC CC WW WW HW WC WW HC B S 1 2 3 4 5 6 7 8 9 19 23 16 BLEACH SOLENOID SWITCH #1
CABINET GROUND BK G W STARTER BALLAST W W RR FLUORESCENT LAMP TIMER MOTOR TM TM-W FABRIC COND. SOLENOID BU-G O-BK W-G BK V PULL-ON PUSH-OFF TIMER KNOB SW. SPEED CONTROL SWITCH BUBU BU-O HI DRIVE MOTOR MED. OR R-W LO GY-P AGITATE SOLENOID Y SUDS VALVE (IF USED)LBU (IF USED) T FULL EMPTY WATER LEVEL SWITCH SWITCH OPEN SWITCH CLOSED G-Y LID SWITCH SPIN SOLENOID G-BK BR Y-R W BR-R HOT VALVE R COLD VALVE TEMP. SW. (CLOSED IN POSITIONS NOTED) HW WC CC WW WW HW WC WW HC B S 1 2 3 4 5 6 7 8 9 19 23 16 BLEACH SOLENOID SWITCH #1 CABINET GROUND BK G W STARTER BALLAST W W RR FLUORESCENT LAMP TIMER MOTOR TM TM-W FABRIC COND. SOLENOID BU-G O-BK W-G BK V PULL-ON PUSH-OFF TIMER KNOB SW. SPEED CONTROL SWITCH BUBU BU-O HI DRIVE MOTOR MED. OR R-W LO GY-P AGITATE SOLENOID Y T FULL B S 1 2 3 4 5 6 7 8 19 23 16 BLEACH SOLENOID SWITCH #1 8 OR
9 You did so well with that last circuit that we can progress to more involved circuits. Let’s assume that you have selected the “wash” cycle that gives you hi-motor agitaiton, your water temperature, and have started the washer. The timer has advanced to a position where it has closed timer switches 1, 5, 7, 10, 11, and 16. In the diagram below we have closed the proper contacts in the water temperature switch. WITH TIMER SWITCHES 1, 5, 7, 10, 11, AND 16 CLOSED, TRACE THE CIRCUITS WITH A WAVY LINE. SPIN SOLENOID14 13 12 RGY R Y-R COLD VALVE LID SWITCH Y-R W G-BK 10 11BR P P2 EMPTY FULL P V T T2T 8 J J 9 SUDS VALVE HOT VALVE BR-R TEMP. SWITCH (CLOSED IN POSITIONS NOTED) * 5 TEMP. ONLY HC WC HW WW* CC WC WW* DRIVE MOTOR HI LO BU OR 6 5 7 16 Y Y AGITATE SOLENOID TIMER MOTOR TM-WTM TM CABINET GROUND BK G W 1A 1 V2 V V BK V3 V3 25 2 SUDS SUDSPULL-ON PUSH-OFF TIMER KNOB SWITCH
10 SPIN SOLENOID14 13 12 RGY R Y-R COLD VALVE LID SWITCH Y-R W G-BK 10 11BR P P2 EMPTY FULL P V T T2T 8 J J 9 SUDS VALVE HOT VALVE BR-R TEMP. SWITCH (CLOSED IN POSITIONS NOTED) * 5 TEMP. ONLY HC WC HW WW* CC WC WW* DRIVE MOTOR HI LO BU OR 6 5 7 16 Y Y AGITATE SOLENOID TIMER MOTOR TM-WTM TM CABINET GROUND BK G W 1A 1 V2 V V BK V3 V3 25 2 SUDS SUDSPULL-ON PUSH-OFF TIMER KNOB SWITCH
11 SPIN SOLENOID14 13 12 RGY R Y-R COLD VALVE LID SWITCH Y-R W G-BK 10 11BR P P2 EMPTY FULL P V T T2T 8 J J 9 SUDS VALVE HOT VALVE BR-R TEMP. SWITCH (CLOSED IN POSITIONS NOTED) * 5 TEMP. ONLY HC WC HW WW* CC WC WW* DRIVE MOTOR HI LO BU OR 6 5 7 16 Y Y AGITATE SOLENOID TIMER MOTOR TM-WTM TM CABINET GROUND BK G W 1A 1 V2 V V BK V3 V3 25 2 SUDS SUDSPULL-ON PUSH-OFF TIMER KNOB SWITCH Very good! In the last diagram the washer was filling with water. By looking at the response you can see that neither the main drive motor, agitate solenoid, nor the timer motor circuits were energized. In the diagram below the water level switch has moved to the FULL position because the washer has filled with water. The same timer switches that were closed in the last diagram are closed. We have closed them for you. DRAW A WAVY LINE THROUGH THE ENERGIZED CIRCUITS BELOW.
12 SPIN SOLENOID14 13 12 RGY R Y-R COLD VALVE LID SWITCH Y-R W G-BK 10 11BR P P2 EMPTY FULL P V T T2T 8 J J 9 SUDS VALVE HOT VALVE BR-R TEMP. SWITCH (CLOSED IN POSITIONS NOTED) * 5 TEMP. ONLY HC WC HW WW* CC WC WW* DRIVE MOTOR HI LO BU OR 6 5 7 16 Y Y AGITATE SOLENOID TIMER MOTOR TM-WTM TM CABINET GROUND BK G W 1A 1 V2 V V BK V3 V3 25 2 SUDS SUDSPULL-ON PUSH-OFF TIMER KNOB SWITCH
13 SPIN SOLENOID14 13 12 RGY R Y-R COLD VALVE LID SWITCH Y-R W G-BK 10 11BR P P2 EMPTY FULL P V T T2T 8 J J 9 SUDS VALVE HOT VALVE BR-R TEMP. SWITCH (CLOSED IN POSITIONS NOTED) * 5 TEMP. ONLY HC WC HW WW* CC WC WW* DRIVE MOTOR HI LO BU OR 6 5 7 16 Y Y AGITATE SOLENOID TIMER MOTOR TM-WTM TM CABINET GROUND BK G W 1A 1 V2 V V BK V3 V3 25 2 SUDS SUDSPULL-ON PUSH-OFF TIMER KNOB SWITCH You are doing very well! Now let’s suppose the timer has advanced and closed timer switches 1, 2, 5, 14, and 16. The LID SWITCH is also closed because the lid is shut. This puts the washer in the SPIN cycle. We have closed the switch contacts in the water temperature switch for you as we have done in the past diagrams. SINCE SWITCHES 1, 2, 5,14, AND 16 ARE CLOSED, TRACE THE CIRCUITS BELOW WITH A WAVY LINE.
14 SPIN SOLENOID14 13 12 RGY R Y-R COLD VALVE LID SWITCH Y-R W G-BK 10 11BR P P2 EMPTY FULL P V T T2T 8 J J 9 SUDS VALVE HOT VALVE BR-R TEMP. SWITCH (CLOSED IN POSITIONS NOTED) * 5 TEMP. ONLY HC WC HW WW* CC WC WW* DRIVE MOTOR HI LO BU OR 6 5 7 16 Y Y AGITATE SOLENOID TIMER MOTOR TM-WTM TM CABINET GROUND BK G W 1A 1 V2 V V BK V3 V3 25 2 SUDS SUDSPULL-ON PUSH-OFF TIMER KNOB SWITCH
15 You did so well with the automatic washer diagrams that you should have no trouble with a wiring diagram for an electric clothes dryer. In the wiring diagram below the customer has selected the “REGULAR” drying cycle by turning the timer dial and has closed the dryer door. However, she has not pushed the “Push-to-Start” relay yet. At the instant of start, when she pushes the “Push-to-Start” relay, which circuits are energized? We have closed the timer switches for you. WITH YOUR PENCIL, TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE. R AH AH1 AH3 AH2 TIMER TEMP. SELECTOR SW. 1.2 K N.C. HT1 HT3 HS1 HS3 N.C. OPERATING THERMOSTAT HI LIMIT THERMOSTAT HEATER TIMER MOTOR THERMOSTAT HEATER BH BH1 H1 H2 RS POWER RESISTOR RS 2M 1M CENTRIFUGAL SWITCH TM CS CT1 L2 N R2 R1 D1 D DOOR SW. P.T.S. RELAYDRIVE MOTOR THERMAL-FUSE NOT RESETTABLE 4M FS1 FS3 L1 BS BS1 BUZZER Y BG RE 6M 5M T B 240 VOLTS 120 VOLTS
16 R AH AH1 AH3 AH2 TIMER TEMP. SELECTOR SW. 1.2 K N.C. HT1 HT3 HS1 HS3 N.C. OPERATING THERMOSTAT HI LIMIT THERMOSTAT HEATER TIMER MOTOR THERMOSTAT HEATER BH BH1 H1 H2 RS POWER RESISTOR RS 2M 1M CENTRIFUGAL SWITCH TM CS CT1 L2 N R2 R1 D1 D DOOR SW. P.T.S. RELAYDRIVE MOTOR THERMAL-FUSE NOT RESETTABLE 4M FS1 FS3 L1 BS BS1 BUZZER Y BG RE 6M 5M T B 240 VOLTS 120 VOLTS
17 The wiring diagram on this page shows the circuits that are made with the dryer running in the “REGULAR” cycle. We have closed the proper switches for this condition for you. DRAW A WAVY LINE THROUGH ALL OF THE ACTIVE CIRCUITS IN THE WIRING DIAGRAM BELOW. R AH AH1 AH3 AH2 TIMER TEMP. SELECTOR SW. 1.2 K N.C. HT1 HT3 HS1 HS3 N.C. OPERATING THERMOSTAT HI LIMIT THERMOSTAT HEATER TIMER MOTOR THERMOSTAT HEATER BH BH1 H1 H2 RS POWER RESISTOR RS 2M 1M CENTRIFUGAL SWITCH TM CS CT1 L2 N R2 R1 D1 D DOOR SW. P.T.S. RELAYDRIVE MOTOR THERMAL-FUSE NOT RESETTABLE 4M FS1 FS3 L1 BS BS1 BUZZER Y BG RE 6M 5M T B 240 VOLTS 120 VOLTS
18 Did you show the buzzer circuit as an active circuit? Remember, it is a basic principle of electricity that current will always follow the path of least resistance. In this case the current bypassed the buzzer circuit and flowed through timer contacts Y-BG and the drive motor circuit — a line of least reistance. R AH AH1 AH3 AH2 TIMER TEMP. SELECTOR SW. 1.2 K N.C. HT1 HT3 HS1 HS3 N.C. OPERATING THERMOSTAT HI LIMIT THERMOSTAT HEATER TIMER MOTOR THERMOSTAT HEATER BH BH1 H1 H2 RS POWER RESISTOR RS 2M 1M CENTRIFUGAL SWITCH TM CS CT1 L2 N R2 R1 D1 D DOOR SW. P.T.S. RELAYDRIVE MOTOR THERMAL-FUSE NOT RESETTABLE 4M FS1 FS3 L1 BS BS1 BUZZER Y BG RE 6M 5M T B 240 VOLTS 120 VOLTS
19 During the “REGULAR” cycle there is no circuit to the timer motor when there is a circuit to the heat source. When the dryer reaches a certain temperature the thermostat will break the circuit to the heat source. This allows the timer motor to run with the active circuit through the power resistor and heater until the dryer cools. The thermostat then closes and makes the circuit to the heat source again. This cycling continues until the timer motor has advanced to the “OFF” position. IN OTHER WORDS, IN THE “REGU- LAR” CYCLE: HEAT ON — TIMER OFF, HEAT OFF — TIMER ON. TRACE THE ACTIVE CIRCUITS IN THE WIRING DIAGRAM BELOW BY DRAWING A WAVY LINE THROUGH THEM. R AH AH1 AH3 AH2 TIMER TEMP. SELECTOR SW. 1.2 K N.C. HT1 HT3 HS1 HS3 N.C. OPERATING THERMOSTAT HI LIMIT THERMOSTAT HEATER TIMER MOTOR THERMOSTAT HEATER BH BH1 H1 H2 RS POWER RESISTOR RS 2M 1M CENTRIFUGAL SWITCH TM CS CT1 L2 N R2 R1 D1 D DOOR SW. P.T.S. RELAYDRIVE MOTOR THERMAL-FUSE NOT RESETTABLE 4M FS1 FS3 L1 BS BS1 BUZZER Y BG RE 6M 5M T B 240 VOLTS 120 VOLTS
R AH AH1 AH3 AH2 TIMER TEMP. SELECTOR SW. 1.2 K N.C. HT1 HT3 HS1 HS3 N.C. OPERATING THERMOSTAT HI LIMIT THERMOSTAT HEATER TIMER MOTOR THERMOSTAT HEATER BH BH1 H1 H2 RS POWER RESISTOR RS 2M 1M CENTRIFUGAL SWITCH TM CS CT1 L2 N R2 R1 D1 D DOOR SW. P.T.S. RELAYDRIVE MOTOR THERMAL-FUSE NOT RESETTABLE 4M FS1 FS3 L1 BS BS1 BUZZER Y BG RE 6M 5M T B 240 VOLTS 120 VOLTS 20
R AH AH1 AH3 AH2 TIMER TEMP. SELECTOR SW. 1.2 K N.C. HT1 HT3 HS1 HS3 N.C. OPERATING THERMOSTAT HI LIMIT THERMOSTAT HEATER TIMER MOTOR THERMOSTAT HEATER BH BH1 H1 H2 RS POWER RESISTOR RS 2M 1M CENTRIFUGAL SWITCH TM CS CT1 L2 N R2 R1 D1 D DOOR SW. P.T.S. RELAYDRIVE MOTOR THERMAL-FUSE NOT RESETTABLE 4M FS1 FS3 L1 BS BS1 BUZZER Y BG RE 6M 5M T B 240 VOLTS 120 VOLTS With 5 minutes left at the end of the “REGULAR” cycle, timer switches Y-R open and TM- CS close. Timer contact Y-RE(T) opens the circuit to the drive motor and allows a momen- tary circuit to be completed through the buzzer and run windings of the drive motor. As the motor slows down, centrifugal switch 5M to 6M opens. This opens the buzzer circuit causing it to stop buzzing. TRACE THE ACTIVE CIRCUIT BELOW WITH A WAVY LINE. 21
R AH AH1 AH3 AH2 TIMER TEMP. SELECTOR SW. 1.2 K N.C. HT1 HT3 HS1 HS3 N.C. OPERATING THERMOSTAT HI LIMIT THERMOSTAT HEATER TIMER MOTOR THERMOSTAT HEATER BH BH1 H1 H2 RS POWER RESISTOR RS 2M 1M CENTRIFUGAL SWITCH TM CS CT1 L2 N R2 R1 D1 D DOOR SW. P.T.S. RELAYDRIVE MOTOR THERMAL-FUSE NOT RESETTABLE 4M FS1 FS3 L1 BS BS1 BUZZER Y BG RE 6M 5M T B 240 VOLTS 120 VOLTS 22
The wiring diagram on this page is for a cycle defrost refrigerator. Let’s assume that the thermostat is calling for cooling and the compressor is running. TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE. 23 120 VOLTS 60 CYCLE R1 BK DOOR SWITCH Y REFRIGERATOR LIGHT W M W W W STILE HEATER MULLION HEATER COMPRESSOR M S C SR RELAY RBK THERMOSTAT R OR EVAPORATOR HEATER DRAIN HEATER OR OVERLOAD
Did you show the parallel circuit for the evaporator heater and drain heater as an active circuit? One of the basic principles of electricity is that current will always follow the path of least resistance. In this case the current bypassed the parallel evaporator-drain heater circuit and flowed through the thermostat contacts, a line of least resistance, and on to the compressor. 24 120 VOLTS 60 CYCLE R1 BK DOOR SWITCH Y REFRIGERATOR LIGHT W M W W W STILE HEATER MULLION HEATER COMPRESSOR M S C SR RELAY RBK THERMOSTAT R OR EVAPORATOR HEATER DRAIN HEATER OR OVERLOAD
The thermostat in the wiring diagram for the cycle defrost refrigerator in this diagram is open. TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE. 25 120 VOLTS 60 CYCLE R1 BK DOOR SWITCH Y REFRIGERATOR LIGHT W M W W W STILE HEATER MULLION HEATER COMPRESSOR M S C SR RELAY RBK THERMOSTAT R OR EVAPORATOR HEATER DRAIN HEATER OR OVERLOAD
The parallel evaporator-drain heater circuit is now active. Although current is flowing through the relay coil and the compressor run winding, there is not enough current to energize the start relay and run the compressor. 26 120 VOLTS 60 CYCLE R1 BK DOOR SWITCH Y REFRIGERATOR LIGHT W M W W W STILE HEATER MULLION HEATER COMPRESSOR M S C SR RELAY RBK THERMOSTAT R OR EVAPORATOR HEATER DRAIN HEATER OR OVERLOAD
This wiring diagram is for a no-frost refrigerator. Note the defrost timer in the lower left part of the diagram. The defrost timer is closed to contact number 4 and the thermostat is calling for cooling, and the compressor is running. TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE. 27 120 VOLTS 60 CYCLE BK UPPER DOOR SWITCH INTERIOR LIGHTS W PK DEFROST BI-METAL PK PK W W W W W W W W MULLION HEATER STILE HEATER CONDENSER FAN EVAP. FAN RELAY DEFROST HEATER DRAIN HEATER BR THERMOSTAT OVERLOAD R M S C M R S CAP. COMPRESSOR R R OR OR OR OR OR BK DEFROST TIMER 1 2 3 4 W TIMER
28 120 VOLTS 60 CYCLE BK UPPER DOOR SWITCH INTERIOR LIGHTS W PK DEFROST BI-METAL PK PK W W W W W W W W MULLION HEATER STILE HEATER CONDENSER FAN EVAP. FAN RELAY DEFROST HEATER DRAIN HEATER BR THERMOSTAT OVERLOAD R M S C M R S CAP. COMPRESSOR R R OR OR OR OR OR BK DEFROST TIMER 1 2 3 4 W TIMER
Note the defrost timer in this diagram. It has closed to contact number 2 and the refrigera- tor is now defrosting. TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE. 29 120 VOLTS 60 CYCLE BK UPPER DOOR SWITCH INTERIOR LIGHTS W PK DEFROST BI-METAL PK PK W W W W W W W W MULLION HEATER STILE HEATER CONDENSER FAN EVAP. FAN RELAY DEFROST HEATER DRAIN HEATER BR THERMOSTAT OVERLOAD R M S C M R S CAP. COMPRESSOR R R OR OR OR OR OR BK DEFROST TIMER 1 2 3 4 W TIMER
30 120 VOLTS 60 CYCLE BK UPPER DOOR SWITCH INTERIOR LIGHTS W PK DEFROST BI-METAL PK PK W W W W W W W W MULLION HEATER STILE HEATER CONDENSER FAN EVAP. FAN RELAY DEFROST HEATER DRAIN HEATER BR THERMOSTAT OVERLOAD R M S C M R S CAP. COMPRESSOR R R OR OR OR OR OR BK DEFROST TIMER 1 2 3 4 W TIMER
31 Let’s turn our attention to dishwasher wiring diagrams. In the dishwasher wiring diagram below let’s assume that the timer has advanced to a fill position and timer switches 2, 3, 5, and 22 are closed. The door is closed and the motor is running. We have closed the contact in the pushbutton selector switch and the push/pull switch for you. TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE. BK G W BK W W W W DRIVE MOTOR MOTOR START RELAY BU-W RUN 1 WASH 3 DRAIN 2 4 VBUBU V TIMER 3 2 1 5 4 Y GY BR BR LBU 11 O-BK 6 19 LBU O-BK WET AGENT DET. DISPENSER W-R W-R OVERFILL SW. FILL VALVE BR-W HEATER W-R W-R PUSHBUTTON SWITCH TIMER MOTOR T-R T-R T-R CABINET GROUND THERMOSTAT W-BK N.O. W-BKW-BK F D H R P-BKP-BK R W-R 28 8 22 T-R PUSH/PULL SWITCH DOOR SWITCH T T
32 BK G W BK W W W W DRIVE MOTOR MOTOR START RELAY BU-W RUN 1 WASH 3 DRAIN 2 4 VBUBU V TIMER 3 2 1 5 4 Y GY BR BR LBU 11 O-BK 6 19 LBU O-BK WET AGENT DET. DISPENSER W-R W-R OVERFILL SW. FILL VALVE BR-W HEATER W-R W-R PUSHBUTTON SWITCH TIMER MOTOR T-R T-R T-R CABINET GROUND THERMOSTAT W-BK N.O. W-BKW-BK F D H R P-BKP-BK R W-R 28 8 22 T-R PUSH/PULL SWITCH DOOR SWITCH T T
33 Let’s trace the circuits for a “heat dry” cycle. During this cycle the drive motor stops running and timer switches 1, 19, and 22 are closed. Once again, we have closed the contact in the pushbutton selector switch and the push/pull switch for you. TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE. BK G W BK W W W W DRIVE MOTOR MOTOR START RELAY BU-W RUN 1 WASH 3 DRAIN 2 4 VBUBU V TIMER 3 2 1 5 4 Y GY BR BR LBU 11 O-BK 6 19 LBU O-BK WET AGENT DET. DISPENSER W-R W-R OVERFILL SW. FILL VALVE BR-W HEATER W-R W-R PUSHBUTTON SWITCH TIMER MOTOR T-R T-R T-R CABINET GROUND THERMOSTAT W-BK N.O. W-BKW-BK F D H R P-BKP-BK R W-R 28 8 22 T-R PUSH/PULL SWITCH DOOR SWITCH T T
34 BK G W BK W W W W DRIVE MOTOR MOTOR START RELAY BU-W RUN 1 WASH 3 DRAIN 2 4 VBUBU V TIMER 3 2 1 5 4 Y GY BR BR LBU 11 O-BK 6 19 LBU O-BK WET AGENT DET. DISPENSER W-R W-R OVERFILL SW. FILL VALVE BR-W HEATER W-R W-R PUSHBUTTON SWITCH TIMER MOTOR T-R T-R T-R CABINET GROUND THERMOSTAT W-BK N.O. W-BKW-BK F D H R P-BKP-BK R W-R 28 8 22 T-R PUSH/PULL SWITCH DOOR SWITCH T T
35 Now we will focus on the microwave oven. The oven cavity light goes ON whenever the door is opened or the microwave oven is operating. This light goes OFF when the micro- wave oven is off. The door is closed and the microwave oven is OFF. TRACE THE POTENTIAL CIRCUITS BELOW WITH A WAVY LINE. BK-W TF1 TF F F1 THERMAL FUSE FUSE 15 AMP P P1 GY GY THERMAL PROTECTOR PRIMARY INTERLOCK SW. R (C) (N.O.) R R R MONITOR SW. LIGHT SW. (N.O.) (N.C.) (N.C.) (C)(C) (C) Y OR START SWITCH COOK RELAY 5 3 7 8 OR Y Y Y DEFROST SWITCH CONTROL MODULE OR-W OR-W Y G W SELECTOR RESISTOR10 4 3 2 1 MOTOR TIMER/DEFROST SELECTOR BU W W W Y MOTOR FAN MOTOR OVEN LIGHT (N.O.) SECONDARY INTERLOCK SW. OL OL1 BK BK L1 N 120 VAC G
36 You can see the potential circuit to the start switch. BK-W TF1 TF F F1 THERMAL FUSE FUSE 15 AMP P P1 GY GY THERMAL PROTECTOR PRIMARY INTERLOCK SW. R (C) (N.O.) R R R MONITOR SW. LIGHT SW. (N.O.) (N.C.) (N.C.) (C)(C) (C) Y OR START SWITCH COOK RELAY 5 3 7 8 OR Y Y Y DEFROST SWITCH CONTROL MODULE OR-W OR-W Y G W SELECTOR RESISTOR10 4 3 2 1 MOTOR TIMER/DEFROST SELECTOR BU W W W Y MOTOR FAN MOTOR OVEN LIGHT (N.O.) SECONDARY INTERLOCK SW. OL OL1 BK BK L1 N 120 VAC G
37 BK-W TF1 TF F F1 THERMAL FUSE FUSE 15 AMP P P1 GY GY THERMAL PROTECTOR PRIMARY INTERLOCK SW. R (C) (N.O.) R R R MONITOR SW. LIGHT SW. (N.O.) (N.C.) (N.C.) (C)(C) (C) Y OR START SWITCH COOK RELAY 5 3 7 8 OR Y Y Y DEFROST SWITCH CONTROL MODULE OR-W OR-W Y G W SELECTOR RESISTOR10 4 3 2 1 MOTOR TIMER/DEFROST SELECTOR BU W W W Y MOTOR FAN MOTOR OVEN LIGHT (N.O.) SECONDARY INTERLOCK SW. OL OL1 BK BK L1 N 120 VAC G Now, with the door is open and the microwave still OFF. TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE.
38 BK-W TF1 TF F F1 THERMAL FUSE FUSE 15 AMP P P1 GY GY THERMAL PROTECTOR PRIMARY INTERLOCK SW. R (C) (N.O.) R R R MONITOR SW. LIGHT SW. (N.O.) (N.C.) (N.C.) (C)(C) (C) Y OR START SWITCH COOK RELAY 5 3 7 8 OR Y Y Y DEFROST SWITCH CONTROL MODULE OR-W OR-W Y G W SELECTOR RESISTOR10 4 3 2 1 MOTOR TIMER/DEFROST SELECTOR BU W W W Y MOTOR FAN MOTOR OVEN LIGHT (N.O.) SECONDARY INTERLOCK SW. OL OL1 BK BK L1 N 120 VAC G
39 BK-W TF1 TF F F1 THERMAL FUSE FUSE 15 AMP P P1 GY GY THERMAL PROTECTOR PRIMARY INTERLOCK SW. R (C) (N.O.) R R R MONITOR SW. LIGHT SW. (N.O.) (N.C.) (N.C.) (C)(C) (C) Y OR START SWITCH COOK RELAY 5 3 7 8 OR Y Y Y DEFROST SWITCH CONTROL MODULE OR-W OR-W Y G W SELECTOR RESISTOR10 4 3 2 1 MOTOR TIMER/DEFROST SELECTOR BU W W W Y MOTOR FAN MOTOR OVEN LIGHT (N.O.) SECONDARY INTERLOCK SW. OL OL1 BK BK L1 N 120 VAC G Great! Now with the door shut, turn the microwave ON. TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE. Remember, when the Push-to-Start switch is briefly closed, the COOK RELAY is energised.
40 BK-W TF1 TF F F1 THERMAL FUSE FUSE 15 AMP P P1 GY GY THERMAL PROTECTOR PRIMARY INTERLOCK SW. R (C) (N.O.) R R R MONITOR SW. LIGHT SW. (N.O.) (N.C.) (N.C.) (C)(C) (C) Y OR START SWITCH COOK RELAY 5 3 7 8 OR Y Y Y DEFROST SWITCH CONTROL MODULE OR-W OR-W Y G W SELECTOR RESISTOR10 4 3 2 1 MOTOR TIMER/DEFROST SELECTOR BU W W W Y MOTOR FAN MOTOR OVEN LIGHT (N.O.) SECONDARY INTERLOCK SW. OL OL1 BK BK L1 N 120 VAC G
41 On this page we show symbols for a switch used on an air conditioner. NOTE: The black dots within the switch indicate a junction, but when a switch function is chosen, all other dots except those on a horizontal line with the chosen function must be ignored. If the switch is set on HI FAN, the circuit through the switch is shown below. If the switch is set on HI COOL, draw the circuit through the switch below. If the switch is set on LO COOL, draw the circuit through the switch below. LO COOL HI COOL HI FAN OFF L1 2 1 3 L2 SWITCH LO COOL HI COOL HI FAN OFF L1 2 1 3 L2 SWITCH LO COOL HI COOL HI FAN OFF L1 2 1 3 L2 SWITCH
42 HI COOL LO COOL LO COOL HI COOL HI FAN OFF L1 2 1 3 L2 SWITCH LO COOL HI COOL HI FAN OFF L1 2 1 3 L2 SWITCH
43 Now that you know how to trace a circuit through the air conditioner switch, we want you to trace out a complete circuit. TRACE A WAVY LINE BELOW THROUGH CIRCUITS WHICH ARE ACTIVE WHEN THE SWITCH IS ON THE HI FAN POSITION. COMPRESSOR BR BK Y RUN CAPACITOR BK TEMP. CONTROL MARKED TERM. BR P C W H L FAN MOTOR FAN MOTOR RUN CAPACITOR BL OR W L2 L1 2 1 3 SWITCH RIBBED SERVICE CORD LO COOL HI COOL HI FAN OFF
44 NOTE THE CIRCUIT THROUGH THE FAN MOTOR. DID YOU GET IT RIGHT? COMPRESSOR BR BK Y RUN CAPACITOR BK TEMP. CONTROL MARKED TERM. BR P C W H L FAN MOTOR FAN MOTOR RUN CAPACITOR BL OR W L2 L1 2 1 3 SWITCH RIBBED SERVICE CORD LO COOL HI COOL HI FAN OFF
45 The fan circuit in the HI COOL and the HI FAN postions will be the same. Remember that this air conditioner temperature control switch (thermostat) closes on heat rise. TRACE A WAVY LINE BELOW THROUGH THE ACTIVE CIRCUITS IN THE HI COOL SETTING. COMPRESSOR BR BK Y RUN CAPACITOR BK TEMP. CONTROL MARKED TERM. BR P C W H L FAN MOTOR FAN MOTOR RUN CAPACITOR BL OR W L2 L1 2 1 3 SWITCH RIBBED SERVICE CORD LO COOL HI COOL HI FAN OFF
46 NOTE THAT NEITHER THE COMPRESSOR OR THE FAN MOTOR USES A START RELAY. THESE MOTORS ARE OF THE PSC (permanent split capacitor) TYPE. COMPRESSOR BR BK Y RUN CAPACITOR BK TEMP. CONTROL MARKED TERM. BR P C W H L FAN MOTOR FAN MOTOR RUN CAPACITOR BL OR W L2 L1 2 1 3 SWITCH RIBBED SERVICE CORD LO COOL HI COOL HI FAN OFF
47 You knew we would want you to trace the LO COOL circuit, too! TRACE A WAVY LINE BELOW THROUGH THE ACTIVE CIRCUITS IN THE LO COOL SETTING. WATCH CAREFULLY AS YOU TRACE THE CIRCUIT THROUGH THE FAN. COMPRESSOR BR BK Y RUN CAPACITOR BK TEMP. CONTROL MARKED TERM. BR P C W H L FAN MOTOR FAN MOTOR RUN CAPACITOR BL OR W L2 L1 2 1 3 SWITCH RIBBED SERVICE CORD LO COOL HI COOL HI FAN OFF
48 Y BK COMPRESSOR BR BK RUN CAPACITOR TEMP. CONTROL MARKED TERM. BR P C W H L FAN MOTOR FAN MOTOR RUN CAPACITOR BL OR W L2 L1 2 1 3 SWITCH RIBBED SERVICE CORD LO COOL HI COOL HI FAN OFF
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Basicelectricity3

  • 1. STUDY COURSE for Home Appliances HOW TO READ: • TIMER SEQUENCE CHARTS (ESTERLINE) • WIRING DIAGRAMS BASIC ELECTRICITY 11 12 9 13 4 6 14 10 7 8 19 23 16 3 5 2 1 sw. 2 2 WASH FILL WASH 4 4 PAUSE DRAIN 6 6 8 8 WASH FILL WASH 10 10 BLEACH 12 12 SUDS STORE DRAIN 14 14 SPRAY 16 16 RINSE FILL RINSE 18 18 DRAIN SPRAY 20 20 SPIN 22 22 24 24 TERMSWITCHFUNCT. MACHINE FUNCTION TERMINAL CODES TIMER SWITCH FUNCTIONSTIMER SWITCH NUMBERS REGULAR/HEAVYOR NORMAL SUPER WASH CYCLE OFF RINSE FILL SPIN BRWASHFILL Y-RRINSEFILL LBUSUDSRET. G-BKSPRAY O-BKRINSECOND. ORMED.MOTOR GYSPIN G-BKDEEPFILL YAGITATE LBUSUDSSTORE BU-OAGIT.MOTOR R-WSPINMOTOR TTIMER BU-GBLEACH BUHI-MOTOR TMBY-PASS --TOOLEDCAM W-GMASTER CHART Module 3 LIT 787741 Rev. B TIMER FUNCTION SWITCH CLOSED SWITCH OPEN TERMINAL CODE SWITCH NUMBER
  • 2. For More Appliance Troubleshooting, Repair Help, & DIY Videos Visit AApplianceAssistant.com Note: This Page was not included by Whirlpool Corporation ApplianceAssistant.com is not affiliated Whirlpool Corporation Whirlpool Corporation in no way endorses ApplianceAssistant.com
  • 3. All rights reserved. No portion of this book may be reproduced in any form without written permission from WHIRLPOOL CORPORATION. © 1989, 1993, 2000 WHIRLPOOL CORPORATION WHIRLPOOL CORPORATION does not assume any responsibility or any liability in connection with the use of this manual. ® The trademarks WHIRLPOOL , , , and FSP are registered trademarks of Whirlpool Corporation.
  • 4. INTRODUCTION The material presented in this module is intended to provide you with an understanding of the fundamentals of electricity as applied to major appliances. Major appliances have become more sophisticated, taking them out of the screwdriver and pliers category. Their electrical circuits include several different types of automatic controls, switches, heaters, valves, etc.. Semiconductors, solid-state controls, and other components usually associated with radio and television electronic circuits, are being engineered into automatic washers, dryers, dishwashers, and refrigerators. The appliance technician is emerging into a professional status of his own. He must prepare himself now to be able to perform his duties today as well as to retain his professionalism in the future. No longer is on-the-job training sufficient to prepare technicians for the complicated procedures required for todays sophisticated appliances. This training can best be obtained through organized classroom study and application. However, much of the knowledge necessary to service todays appliances can be obtained through study courses. Completion of this and other courses will provide you with sufficient understanding of appliances and their operation to enable you to do minor service. It will also serve as a valuable stepping stone to more advanced study and on-the-job training to improve your servicing skills. Information contained in this module is used on WHIRLPOOL® appliances. 1
  • 5. TABLE of CONTENTS PAGE CHAPTER 1 ..............................................................................................3 Timer Sequence Charts (Esterline) CHAPTER 2 ..............................................................................................7 Wiring Diagrams *TEST ............................................................See Test Book LIT787743 *NOTE: We recommend taking the TEST for MODULE 3, right after studying it. 2
  • 6. CHAPTER 1 TIMER SEQUENCE GHARTS (ESTERLINE) 3 Page 5 represents a sample timer sequence chart. Page 6 represents a sample wiring diagram. This detailed chart shows how the timer motor and timer switch operation control machine functions. When the timer switch sequence chart information is com- pared to the wiring diagram, electrical and mechani- cal diagnosis can be accomplished. The top horizontal row of numbers across the top of the timer sequence chart represents timer SWITCH NUMBERS. These numbers will not be found on the actual timer. They are merely guides to be used to relate between the timer sequence chart and the wiring diagram. The timer switch functions are shown directly below the timer switch numbers. These relate to the function controlled by that switch contact. The letters below the timer switch functions, such as LBU, GY, G-BK, O-BK, etc., represent the actual timer terminal markings and wiring color code. The vertical column at the right of the timer sequence chart shows the cycles of machine operation. As you can see, in this particular chart we are only showing three Cycles — NORMAL or REGULAR/HEAVY, GENTLE and PERMANENT PRESS, as well as the special cycle — SUPER WASH. To the right of each cycle are the machine functions for that cycle. The columns under the machine function heading give the basic operation on the left, and give the supporting functions on the right, for each timer step. Even numbered timer steps are shown to the left of thewashcycles.Theoddnumberstepsarenotshown, to avoid confusion and an overcrowded appearance. Each timer space represents a definite period of time. Closedswitchesforthecomponentsofeachtimerstep are represented by the HEAVY VERTICAL BARS in the timer switch sequence chart. The timer switch sequence chart explains the when, what, why, and how of machine function at any selected point of operation. In order to properly diagnose a problem, the electrical circuitry and the wiring diagram, attached to the product must be thoroughly understood. Let’s first study each part of the wiring diagram. On page 6 the symbol shown at the top of the page by the letters BK, G, and W represents the line cord attachment plug. The line marked W extends down the right side of the diagram and is known as the neutral side of the electrical system. Note that this line connects directly to one side of each energy converting (electrical to mechanical) component of theautomaticwasher,withoutanycontrollingswitch. The line shown as BK extends to the left and is known as the hot side of the electrical system. It provides a circuit to the master switch (No. 1) and to all the other electrically operated components through the timer switches, and/or the water level and temperature switches. Theheavyblacklinesconnectedtonumberedswitches represent circuits and switches within the timer assembly. The pull-on, push-off timer knob switch controls all circuits. This switch will start the automatic washer operation when the timer knob is pulled out, and will stop the operation when it is pushed in. All timer switches are numbered to correspond with the timer sequence chart. Any given machine compo- nent is always controlled by the same timer switch number, regardless of the model. For example: Five (5) is always reserved for high motor speed; seven (7) is always reserved for agitation, etc. Wiring harnesses are color coded, to match the color coded lettering imprinted on the wires of the timer terminal connections. Any given automatic washer component always uses the same wiring harness color and color code lettering, regardless of model. Example: BU (Blue) is always used for high motor speed; Y (Yellow) is always used for agitation. Any given component is always shown at the same position on the wiring diagram. The water tempera- ture switch is shown within dashed lines, near the bottom of the wiring chart. The lettering at the right of the switch contacts indicates present contacts for various combinations of wash and rinse water tem- peratureselections.ThefirstletterrepresentsWASH water temperature, while the second letter identifies RINSE water temperature.
  • 7. 4 Sincestudyingandlearninginformationhasnovalue until it is applied, let’s follow this step-by-step proce- dure to diagnose a machine malfunction. For an example, say the washer was set in the GENTLE cycle with the water temperature switch set at HOT WASH and COLD RINSE, and that the washer will not FILL. A rule is to always check the easy and obvious first. Is there power to the machine? Be sure the machines power cord is plugged into a live wall receptacle. Next, be sure the water faucets are turned On! Also, make sure the timer dial indication coincides with the timer function. Let’s assume in our example that, having completed all the normal examinations, the machine still does not FILL. Turn to the wiring diagram and timer sequence chart. By using this information, you will be able to determine which circuits and components are affected in the appliances electrical system at any given time. The wiring chart is easy to follow when a step-by-step checking sequence is used. Fill, in the GENTLE cycle, takes place in timer Step 26. Let’s start by drawing a line horizontally through timer Step 26 on the timer sequence chart and note the closed circuits. The closed switches are switch no. 1 (master), no. 16 (timer), no. 19 (agitate motor), no. 7 (agitate), no. 10 (deep fill) and switch no. 11 (wash fill). Now close these switches on the wiring diagram on page 6. As you can see by the heavy line, the electric- ity on the “BK” side of the line flows through switch no. 1, the water level switch (empty), temperature switch and the mixing valve and then back through the “W” side of the line, completing a circuit. Since our problem is “No Fill,” the first thing to do is turn your timer dial to the start of the GENTLE cycle. Did the light, if used, turn on? If so, timer switch no. 1 is ok. Now turn your timer dial to SPIN and pull the knob out. Did your automatic washer start to spin? If so, the water level switch is ok. Now you will have to check out timer switches no. 10 and no. 11, the temperature switch and the mixing valve to find and correct the problem. When the correct water level is reached, the switch trips from “P” (empty) to “T” (full). With the water level switch tripping from “P” to “T,” there is no electricity through switches no. 10 and no. 11, temperature switch and the mixing valve. Electricityflowsfromthe“BK”sideofthelinethrough switch no. 1, the water level switch (full), agitate solenoid, speed switch/drive motor and timer motor all at the same time, completing a circuit through the “W” side of the line. You can also see when switch no. 1 is closed. This completes a circuit through the ballast and fluores- cent lamp, no matter what the water level switch is doing.
  • 8. 5 SAMPLE TIMER SEQUENCE CHART (ESTERLINE) 11 12 9 13 4 6 14 10 7 8 19 23 16 3 5 2 1 sw. 2 2 WASH FILL WASH 4 4 PAUSE DRAIN 6 6 8 8 WASH FILL WASH 10 10 BLEACH 12 12 SUDS STORE DRAIN 14 14 SPRAY 16 16 RINSE FILL RINSE 18 18 DRAIN SPRAY 20 20 SPIN 22 22 24 24 26 26 WASH FILL WASH 28 28 SUDS STORE DRAIN 30 30 SPRAY SPIN RINSE FILL 32 32 RINSE DRAIN 34 34 36 36 OFF 38 38 40 40 WASH FILL WASH 42 42 PAUSE DRAIN 44 44 46 46 WASH FILL WASH TERMSWITCHFUNCT. MACHINE FUNCTION TERMINAL CODES TIMER SWITCH FUNCTIONSTIMER SWITCH NUMBERS REGULAR/HEAVYOR NORMAL PERMANENT PRESS GENTLE SUPER WASH SUPER WASH CYCLE TIMER STEPS MACHINE FUNCTION (EMPTY) MACHINE FUNCTION (FULL) TIMER STEPS RINSE FILL SPIN OFF RINSE FILL SPIN SWITCH OPENINGS AND CLOSINGS BRWASHFILL Y-RRINSEFILL LBUSUDSRET. G-BKSPRAY O-BKRINSECOND. ORMED.MOTOR GYSPIN G-BKDEEPFILL YAGITATE LBUSUDSSTORE BU-OAGIT.MOTOR R-WSPINMOTOR TTIMER BU-GBLEACH BUHI-MOTOR TMBY-PASS --TOOLEDCAM W-GMASTER TIMERSWITCHSEQUENCECHART CYCLE
  • 9. 11 12 9 13 4 6 14 10 7 8 19 23 16 3 5 2 1 sw. 2 2 WASH FILL WASH 4 4 PAUSE DRAIN 6 6 8 8 WASH FILL WASH 10 10 BLEACH 12 12 SUDS STORE DRAIN 14 14 SPRAY 16 16 RINSE FILL RINSE 18 18 DRAIN SPRAY 20 20 SPIN TERMSWITCHFUNCT. MACHINE FUNCTION TERMINAL CODES TIMER SWITCH FUNCTIONSTIMER SWITCH NUMBERS REGULAR/HEAVYOR NORMAL SUPER WASH CYCLE RINSE FILL SPIN BRWASHFILL Y-RRINSEFILL LBUSUDSRET. G-BKSPRAY O-BKRINSECOND. ORMED.MOTOR GYSPIN G-BKDEEPFILL YAGITATE LBUSUDSSTORE BU-OAGIT.MOTOR R-WSPINMOTOR TTIMER BU-GBLEACH BUHI-MOTOR TMBY-PASS --TOOLEDCAM W-GMASTER 6 SAMPLE WIRING DIAGRAM 16 (OPEN) (OPEN) (OPEN) (OPEN) (OPEN) (OPEN) (OPEN) (OPEN) (OPEN) 14 13 12 10 11 8 9 (CLOSED) (CLOSED) (CLOSED) (CLOSED) (CLOSED) 1 2 3 4 5 6 7 23 19 (OPEN)(CLOSED) CABINET GROUND BK G W STARTER BALLAST W W RR FLUORESCENT LAMP TIMER MOTOR TM TM-W BLEACH SOLENOID FABRIC COND. SOLENOID BU-G O-BK W-G BK V PULL-ON PUSH-OFF TIMER KNOB SW. SPEED CONTROL SWITCH BUBU BU-O HI DRIVE MOTOR MED. OR R-W LO GY-P AGITATE SOLENOID Y SUDS VALVE (IF USED)LBU (IF USED) T FULL EMPTY WATER LEVEL SWITCH G-Y LID SWITCH SPIN SOLENOID G-BK BR Y-R W BR-R HOT VALVE R COLD VALVE TEMP. SW. (CLOSED IN POSITIONS NOTED) HW WC CC WW WW HW WC WW HC B S
  • 10. CHAPTER 2 WIRING DIAGRAMS In this chapter each page is a typical wiring diagram. You will find the response on the back of the page. Let’s take a look at a wiring diagram for an automatic washer. Note switch number 1 on the diagram. It is first in line and is the master switch. No circuits are energized when the dial is in the off position. Turn the dial to any operating position and one circuit is energized even before you operate the push-pull switch by pulling the knob. WITH YOUR PENCIL, CLOSE SWITCH 1 AND DRAW A WAVY LINE THROUGH THE ENERGIZED CIRCUIT. 7 CABINET GROUND BK G W STARTER BALLAST W W RR FLUORESCENT LAMP TIMER MOTOR TM TM-W FABRIC COND. SOLENOID BU-G O-BK W-G BK V PULL-ON PUSH-OFF TIMER KNOB SW. SPEED CONTROL SWITCH BUBU BU-O HI DRIVE MOTOR MED. OR R-W LO GY-P AGITATE SOLENOID Y SUDS VALVE (IF USED)LBU (IF USED) T FULL EMPTY WATER LEVEL SWITCH SWITCH OPEN G-BK BR BR-R HOT VALVETEMP. SW. (CLOSED IN POSITIONS NOTED) HW WC CC WW WW HW WC WW HC B S 1 2 3 4 5 6 7 8 9 19 23 16 BLEACH SOLENOID SWITCH #1
  • 11. CABINET GROUND BK G W STARTER BALLAST W W RR FLUORESCENT LAMP TIMER MOTOR TM TM-W FABRIC COND. SOLENOID BU-G O-BK W-G BK V PULL-ON PUSH-OFF TIMER KNOB SW. SPEED CONTROL SWITCH BUBU BU-O HI DRIVE MOTOR MED. OR R-W LO GY-P AGITATE SOLENOID Y SUDS VALVE (IF USED)LBU (IF USED) T FULL EMPTY WATER LEVEL SWITCH SWITCH OPEN SWITCH CLOSED G-Y LID SWITCH SPIN SOLENOID G-BK BR Y-R W BR-R HOT VALVE R COLD VALVE TEMP. SW. (CLOSED IN POSITIONS NOTED) HW WC CC WW WW HW WC WW HC B S 1 2 3 4 5 6 7 8 9 19 23 16 BLEACH SOLENOID SWITCH #1 CABINET GROUND BK G W STARTER BALLAST W W RR FLUORESCENT LAMP TIMER MOTOR TM TM-W FABRIC COND. SOLENOID BU-G O-BK W-G BK V PULL-ON PUSH-OFF TIMER KNOB SW. SPEED CONTROL SWITCH BUBU BU-O HI DRIVE MOTOR MED. OR R-W LO GY-P AGITATE SOLENOID Y T FULL B S 1 2 3 4 5 6 7 8 19 23 16 BLEACH SOLENOID SWITCH #1 8 OR
  • 12. 9 You did so well with that last circuit that we can progress to more involved circuits. Let’s assume that you have selected the “wash” cycle that gives you hi-motor agitaiton, your water temperature, and have started the washer. The timer has advanced to a position where it has closed timer switches 1, 5, 7, 10, 11, and 16. In the diagram below we have closed the proper contacts in the water temperature switch. WITH TIMER SWITCHES 1, 5, 7, 10, 11, AND 16 CLOSED, TRACE THE CIRCUITS WITH A WAVY LINE. SPIN SOLENOID14 13 12 RGY R Y-R COLD VALVE LID SWITCH Y-R W G-BK 10 11BR P P2 EMPTY FULL P V T T2T 8 J J 9 SUDS VALVE HOT VALVE BR-R TEMP. SWITCH (CLOSED IN POSITIONS NOTED) * 5 TEMP. ONLY HC WC HW WW* CC WC WW* DRIVE MOTOR HI LO BU OR 6 5 7 16 Y Y AGITATE SOLENOID TIMER MOTOR TM-WTM TM CABINET GROUND BK G W 1A 1 V2 V V BK V3 V3 25 2 SUDS SUDSPULL-ON PUSH-OFF TIMER KNOB SWITCH
  • 13. 10 SPIN SOLENOID14 13 12 RGY R Y-R COLD VALVE LID SWITCH Y-R W G-BK 10 11BR P P2 EMPTY FULL P V T T2T 8 J J 9 SUDS VALVE HOT VALVE BR-R TEMP. SWITCH (CLOSED IN POSITIONS NOTED) * 5 TEMP. ONLY HC WC HW WW* CC WC WW* DRIVE MOTOR HI LO BU OR 6 5 7 16 Y Y AGITATE SOLENOID TIMER MOTOR TM-WTM TM CABINET GROUND BK G W 1A 1 V2 V V BK V3 V3 25 2 SUDS SUDSPULL-ON PUSH-OFF TIMER KNOB SWITCH
  • 14. 11 SPIN SOLENOID14 13 12 RGY R Y-R COLD VALVE LID SWITCH Y-R W G-BK 10 11BR P P2 EMPTY FULL P V T T2T 8 J J 9 SUDS VALVE HOT VALVE BR-R TEMP. SWITCH (CLOSED IN POSITIONS NOTED) * 5 TEMP. ONLY HC WC HW WW* CC WC WW* DRIVE MOTOR HI LO BU OR 6 5 7 16 Y Y AGITATE SOLENOID TIMER MOTOR TM-WTM TM CABINET GROUND BK G W 1A 1 V2 V V BK V3 V3 25 2 SUDS SUDSPULL-ON PUSH-OFF TIMER KNOB SWITCH Very good! In the last diagram the washer was filling with water. By looking at the response you can see that neither the main drive motor, agitate solenoid, nor the timer motor circuits were energized. In the diagram below the water level switch has moved to the FULL position because the washer has filled with water. The same timer switches that were closed in the last diagram are closed. We have closed them for you. DRAW A WAVY LINE THROUGH THE ENERGIZED CIRCUITS BELOW.
  • 15. 12 SPIN SOLENOID14 13 12 RGY R Y-R COLD VALVE LID SWITCH Y-R W G-BK 10 11BR P P2 EMPTY FULL P V T T2T 8 J J 9 SUDS VALVE HOT VALVE BR-R TEMP. SWITCH (CLOSED IN POSITIONS NOTED) * 5 TEMP. ONLY HC WC HW WW* CC WC WW* DRIVE MOTOR HI LO BU OR 6 5 7 16 Y Y AGITATE SOLENOID TIMER MOTOR TM-WTM TM CABINET GROUND BK G W 1A 1 V2 V V BK V3 V3 25 2 SUDS SUDSPULL-ON PUSH-OFF TIMER KNOB SWITCH
  • 16. 13 SPIN SOLENOID14 13 12 RGY R Y-R COLD VALVE LID SWITCH Y-R W G-BK 10 11BR P P2 EMPTY FULL P V T T2T 8 J J 9 SUDS VALVE HOT VALVE BR-R TEMP. SWITCH (CLOSED IN POSITIONS NOTED) * 5 TEMP. ONLY HC WC HW WW* CC WC WW* DRIVE MOTOR HI LO BU OR 6 5 7 16 Y Y AGITATE SOLENOID TIMER MOTOR TM-WTM TM CABINET GROUND BK G W 1A 1 V2 V V BK V3 V3 25 2 SUDS SUDSPULL-ON PUSH-OFF TIMER KNOB SWITCH You are doing very well! Now let’s suppose the timer has advanced and closed timer switches 1, 2, 5, 14, and 16. The LID SWITCH is also closed because the lid is shut. This puts the washer in the SPIN cycle. We have closed the switch contacts in the water temperature switch for you as we have done in the past diagrams. SINCE SWITCHES 1, 2, 5,14, AND 16 ARE CLOSED, TRACE THE CIRCUITS BELOW WITH A WAVY LINE.
  • 17. 14 SPIN SOLENOID14 13 12 RGY R Y-R COLD VALVE LID SWITCH Y-R W G-BK 10 11BR P P2 EMPTY FULL P V T T2T 8 J J 9 SUDS VALVE HOT VALVE BR-R TEMP. SWITCH (CLOSED IN POSITIONS NOTED) * 5 TEMP. ONLY HC WC HW WW* CC WC WW* DRIVE MOTOR HI LO BU OR 6 5 7 16 Y Y AGITATE SOLENOID TIMER MOTOR TM-WTM TM CABINET GROUND BK G W 1A 1 V2 V V BK V3 V3 25 2 SUDS SUDSPULL-ON PUSH-OFF TIMER KNOB SWITCH
  • 18. 15 You did so well with the automatic washer diagrams that you should have no trouble with a wiring diagram for an electric clothes dryer. In the wiring diagram below the customer has selected the “REGULAR” drying cycle by turning the timer dial and has closed the dryer door. However, she has not pushed the “Push-to-Start” relay yet. At the instant of start, when she pushes the “Push-to-Start” relay, which circuits are energized? We have closed the timer switches for you. WITH YOUR PENCIL, TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE. R AH AH1 AH3 AH2 TIMER TEMP. SELECTOR SW. 1.2 K N.C. HT1 HT3 HS1 HS3 N.C. OPERATING THERMOSTAT HI LIMIT THERMOSTAT HEATER TIMER MOTOR THERMOSTAT HEATER BH BH1 H1 H2 RS POWER RESISTOR RS 2M 1M CENTRIFUGAL SWITCH TM CS CT1 L2 N R2 R1 D1 D DOOR SW. P.T.S. RELAYDRIVE MOTOR THERMAL-FUSE NOT RESETTABLE 4M FS1 FS3 L1 BS BS1 BUZZER Y BG RE 6M 5M T B 240 VOLTS 120 VOLTS
  • 19. 16 R AH AH1 AH3 AH2 TIMER TEMP. SELECTOR SW. 1.2 K N.C. HT1 HT3 HS1 HS3 N.C. OPERATING THERMOSTAT HI LIMIT THERMOSTAT HEATER TIMER MOTOR THERMOSTAT HEATER BH BH1 H1 H2 RS POWER RESISTOR RS 2M 1M CENTRIFUGAL SWITCH TM CS CT1 L2 N R2 R1 D1 D DOOR SW. P.T.S. RELAYDRIVE MOTOR THERMAL-FUSE NOT RESETTABLE 4M FS1 FS3 L1 BS BS1 BUZZER Y BG RE 6M 5M T B 240 VOLTS 120 VOLTS
  • 20. 17 The wiring diagram on this page shows the circuits that are made with the dryer running in the “REGULAR” cycle. We have closed the proper switches for this condition for you. DRAW A WAVY LINE THROUGH ALL OF THE ACTIVE CIRCUITS IN THE WIRING DIAGRAM BELOW. R AH AH1 AH3 AH2 TIMER TEMP. SELECTOR SW. 1.2 K N.C. HT1 HT3 HS1 HS3 N.C. OPERATING THERMOSTAT HI LIMIT THERMOSTAT HEATER TIMER MOTOR THERMOSTAT HEATER BH BH1 H1 H2 RS POWER RESISTOR RS 2M 1M CENTRIFUGAL SWITCH TM CS CT1 L2 N R2 R1 D1 D DOOR SW. P.T.S. RELAYDRIVE MOTOR THERMAL-FUSE NOT RESETTABLE 4M FS1 FS3 L1 BS BS1 BUZZER Y BG RE 6M 5M T B 240 VOLTS 120 VOLTS
  • 21. 18 Did you show the buzzer circuit as an active circuit? Remember, it is a basic principle of electricity that current will always follow the path of least resistance. In this case the current bypassed the buzzer circuit and flowed through timer contacts Y-BG and the drive motor circuit — a line of least reistance. R AH AH1 AH3 AH2 TIMER TEMP. SELECTOR SW. 1.2 K N.C. HT1 HT3 HS1 HS3 N.C. OPERATING THERMOSTAT HI LIMIT THERMOSTAT HEATER TIMER MOTOR THERMOSTAT HEATER BH BH1 H1 H2 RS POWER RESISTOR RS 2M 1M CENTRIFUGAL SWITCH TM CS CT1 L2 N R2 R1 D1 D DOOR SW. P.T.S. RELAYDRIVE MOTOR THERMAL-FUSE NOT RESETTABLE 4M FS1 FS3 L1 BS BS1 BUZZER Y BG RE 6M 5M T B 240 VOLTS 120 VOLTS
  • 22. 19 During the “REGULAR” cycle there is no circuit to the timer motor when there is a circuit to the heat source. When the dryer reaches a certain temperature the thermostat will break the circuit to the heat source. This allows the timer motor to run with the active circuit through the power resistor and heater until the dryer cools. The thermostat then closes and makes the circuit to the heat source again. This cycling continues until the timer motor has advanced to the “OFF” position. IN OTHER WORDS, IN THE “REGU- LAR” CYCLE: HEAT ON — TIMER OFF, HEAT OFF — TIMER ON. TRACE THE ACTIVE CIRCUITS IN THE WIRING DIAGRAM BELOW BY DRAWING A WAVY LINE THROUGH THEM. R AH AH1 AH3 AH2 TIMER TEMP. SELECTOR SW. 1.2 K N.C. HT1 HT3 HS1 HS3 N.C. OPERATING THERMOSTAT HI LIMIT THERMOSTAT HEATER TIMER MOTOR THERMOSTAT HEATER BH BH1 H1 H2 RS POWER RESISTOR RS 2M 1M CENTRIFUGAL SWITCH TM CS CT1 L2 N R2 R1 D1 D DOOR SW. P.T.S. RELAYDRIVE MOTOR THERMAL-FUSE NOT RESETTABLE 4M FS1 FS3 L1 BS BS1 BUZZER Y BG RE 6M 5M T B 240 VOLTS 120 VOLTS
  • 23. R AH AH1 AH3 AH2 TIMER TEMP. SELECTOR SW. 1.2 K N.C. HT1 HT3 HS1 HS3 N.C. OPERATING THERMOSTAT HI LIMIT THERMOSTAT HEATER TIMER MOTOR THERMOSTAT HEATER BH BH1 H1 H2 RS POWER RESISTOR RS 2M 1M CENTRIFUGAL SWITCH TM CS CT1 L2 N R2 R1 D1 D DOOR SW. P.T.S. RELAYDRIVE MOTOR THERMAL-FUSE NOT RESETTABLE 4M FS1 FS3 L1 BS BS1 BUZZER Y BG RE 6M 5M T B 240 VOLTS 120 VOLTS 20
  • 24. R AH AH1 AH3 AH2 TIMER TEMP. SELECTOR SW. 1.2 K N.C. HT1 HT3 HS1 HS3 N.C. OPERATING THERMOSTAT HI LIMIT THERMOSTAT HEATER TIMER MOTOR THERMOSTAT HEATER BH BH1 H1 H2 RS POWER RESISTOR RS 2M 1M CENTRIFUGAL SWITCH TM CS CT1 L2 N R2 R1 D1 D DOOR SW. P.T.S. RELAYDRIVE MOTOR THERMAL-FUSE NOT RESETTABLE 4M FS1 FS3 L1 BS BS1 BUZZER Y BG RE 6M 5M T B 240 VOLTS 120 VOLTS With 5 minutes left at the end of the “REGULAR” cycle, timer switches Y-R open and TM- CS close. Timer contact Y-RE(T) opens the circuit to the drive motor and allows a momen- tary circuit to be completed through the buzzer and run windings of the drive motor. As the motor slows down, centrifugal switch 5M to 6M opens. This opens the buzzer circuit causing it to stop buzzing. TRACE THE ACTIVE CIRCUIT BELOW WITH A WAVY LINE. 21
  • 25. R AH AH1 AH3 AH2 TIMER TEMP. SELECTOR SW. 1.2 K N.C. HT1 HT3 HS1 HS3 N.C. OPERATING THERMOSTAT HI LIMIT THERMOSTAT HEATER TIMER MOTOR THERMOSTAT HEATER BH BH1 H1 H2 RS POWER RESISTOR RS 2M 1M CENTRIFUGAL SWITCH TM CS CT1 L2 N R2 R1 D1 D DOOR SW. P.T.S. RELAYDRIVE MOTOR THERMAL-FUSE NOT RESETTABLE 4M FS1 FS3 L1 BS BS1 BUZZER Y BG RE 6M 5M T B 240 VOLTS 120 VOLTS 22
  • 26. The wiring diagram on this page is for a cycle defrost refrigerator. Let’s assume that the thermostat is calling for cooling and the compressor is running. TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE. 23 120 VOLTS 60 CYCLE R1 BK DOOR SWITCH Y REFRIGERATOR LIGHT W M W W W STILE HEATER MULLION HEATER COMPRESSOR M S C SR RELAY RBK THERMOSTAT R OR EVAPORATOR HEATER DRAIN HEATER OR OVERLOAD
  • 27. Did you show the parallel circuit for the evaporator heater and drain heater as an active circuit? One of the basic principles of electricity is that current will always follow the path of least resistance. In this case the current bypassed the parallel evaporator-drain heater circuit and flowed through the thermostat contacts, a line of least resistance, and on to the compressor. 24 120 VOLTS 60 CYCLE R1 BK DOOR SWITCH Y REFRIGERATOR LIGHT W M W W W STILE HEATER MULLION HEATER COMPRESSOR M S C SR RELAY RBK THERMOSTAT R OR EVAPORATOR HEATER DRAIN HEATER OR OVERLOAD
  • 28. The thermostat in the wiring diagram for the cycle defrost refrigerator in this diagram is open. TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE. 25 120 VOLTS 60 CYCLE R1 BK DOOR SWITCH Y REFRIGERATOR LIGHT W M W W W STILE HEATER MULLION HEATER COMPRESSOR M S C SR RELAY RBK THERMOSTAT R OR EVAPORATOR HEATER DRAIN HEATER OR OVERLOAD
  • 29. The parallel evaporator-drain heater circuit is now active. Although current is flowing through the relay coil and the compressor run winding, there is not enough current to energize the start relay and run the compressor. 26 120 VOLTS 60 CYCLE R1 BK DOOR SWITCH Y REFRIGERATOR LIGHT W M W W W STILE HEATER MULLION HEATER COMPRESSOR M S C SR RELAY RBK THERMOSTAT R OR EVAPORATOR HEATER DRAIN HEATER OR OVERLOAD
  • 30. This wiring diagram is for a no-frost refrigerator. Note the defrost timer in the lower left part of the diagram. The defrost timer is closed to contact number 4 and the thermostat is calling for cooling, and the compressor is running. TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE. 27 120 VOLTS 60 CYCLE BK UPPER DOOR SWITCH INTERIOR LIGHTS W PK DEFROST BI-METAL PK PK W W W W W W W W MULLION HEATER STILE HEATER CONDENSER FAN EVAP. FAN RELAY DEFROST HEATER DRAIN HEATER BR THERMOSTAT OVERLOAD R M S C M R S CAP. COMPRESSOR R R OR OR OR OR OR BK DEFROST TIMER 1 2 3 4 W TIMER
  • 31. 28 120 VOLTS 60 CYCLE BK UPPER DOOR SWITCH INTERIOR LIGHTS W PK DEFROST BI-METAL PK PK W W W W W W W W MULLION HEATER STILE HEATER CONDENSER FAN EVAP. FAN RELAY DEFROST HEATER DRAIN HEATER BR THERMOSTAT OVERLOAD R M S C M R S CAP. COMPRESSOR R R OR OR OR OR OR BK DEFROST TIMER 1 2 3 4 W TIMER
  • 32. Note the defrost timer in this diagram. It has closed to contact number 2 and the refrigera- tor is now defrosting. TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE. 29 120 VOLTS 60 CYCLE BK UPPER DOOR SWITCH INTERIOR LIGHTS W PK DEFROST BI-METAL PK PK W W W W W W W W MULLION HEATER STILE HEATER CONDENSER FAN EVAP. FAN RELAY DEFROST HEATER DRAIN HEATER BR THERMOSTAT OVERLOAD R M S C M R S CAP. COMPRESSOR R R OR OR OR OR OR BK DEFROST TIMER 1 2 3 4 W TIMER
  • 33. 30 120 VOLTS 60 CYCLE BK UPPER DOOR SWITCH INTERIOR LIGHTS W PK DEFROST BI-METAL PK PK W W W W W W W W MULLION HEATER STILE HEATER CONDENSER FAN EVAP. FAN RELAY DEFROST HEATER DRAIN HEATER BR THERMOSTAT OVERLOAD R M S C M R S CAP. COMPRESSOR R R OR OR OR OR OR BK DEFROST TIMER 1 2 3 4 W TIMER
  • 34. 31 Let’s turn our attention to dishwasher wiring diagrams. In the dishwasher wiring diagram below let’s assume that the timer has advanced to a fill position and timer switches 2, 3, 5, and 22 are closed. The door is closed and the motor is running. We have closed the contact in the pushbutton selector switch and the push/pull switch for you. TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE. BK G W BK W W W W DRIVE MOTOR MOTOR START RELAY BU-W RUN 1 WASH 3 DRAIN 2 4 VBUBU V TIMER 3 2 1 5 4 Y GY BR BR LBU 11 O-BK 6 19 LBU O-BK WET AGENT DET. DISPENSER W-R W-R OVERFILL SW. FILL VALVE BR-W HEATER W-R W-R PUSHBUTTON SWITCH TIMER MOTOR T-R T-R T-R CABINET GROUND THERMOSTAT W-BK N.O. W-BKW-BK F D H R P-BKP-BK R W-R 28 8 22 T-R PUSH/PULL SWITCH DOOR SWITCH T T
  • 35. 32 BK G W BK W W W W DRIVE MOTOR MOTOR START RELAY BU-W RUN 1 WASH 3 DRAIN 2 4 VBUBU V TIMER 3 2 1 5 4 Y GY BR BR LBU 11 O-BK 6 19 LBU O-BK WET AGENT DET. DISPENSER W-R W-R OVERFILL SW. FILL VALVE BR-W HEATER W-R W-R PUSHBUTTON SWITCH TIMER MOTOR T-R T-R T-R CABINET GROUND THERMOSTAT W-BK N.O. W-BKW-BK F D H R P-BKP-BK R W-R 28 8 22 T-R PUSH/PULL SWITCH DOOR SWITCH T T
  • 36. 33 Let’s trace the circuits for a “heat dry” cycle. During this cycle the drive motor stops running and timer switches 1, 19, and 22 are closed. Once again, we have closed the contact in the pushbutton selector switch and the push/pull switch for you. TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE. BK G W BK W W W W DRIVE MOTOR MOTOR START RELAY BU-W RUN 1 WASH 3 DRAIN 2 4 VBUBU V TIMER 3 2 1 5 4 Y GY BR BR LBU 11 O-BK 6 19 LBU O-BK WET AGENT DET. DISPENSER W-R W-R OVERFILL SW. FILL VALVE BR-W HEATER W-R W-R PUSHBUTTON SWITCH TIMER MOTOR T-R T-R T-R CABINET GROUND THERMOSTAT W-BK N.O. W-BKW-BK F D H R P-BKP-BK R W-R 28 8 22 T-R PUSH/PULL SWITCH DOOR SWITCH T T
  • 37. 34 BK G W BK W W W W DRIVE MOTOR MOTOR START RELAY BU-W RUN 1 WASH 3 DRAIN 2 4 VBUBU V TIMER 3 2 1 5 4 Y GY BR BR LBU 11 O-BK 6 19 LBU O-BK WET AGENT DET. DISPENSER W-R W-R OVERFILL SW. FILL VALVE BR-W HEATER W-R W-R PUSHBUTTON SWITCH TIMER MOTOR T-R T-R T-R CABINET GROUND THERMOSTAT W-BK N.O. W-BKW-BK F D H R P-BKP-BK R W-R 28 8 22 T-R PUSH/PULL SWITCH DOOR SWITCH T T
  • 38. 35 Now we will focus on the microwave oven. The oven cavity light goes ON whenever the door is opened or the microwave oven is operating. This light goes OFF when the micro- wave oven is off. The door is closed and the microwave oven is OFF. TRACE THE POTENTIAL CIRCUITS BELOW WITH A WAVY LINE. BK-W TF1 TF F F1 THERMAL FUSE FUSE 15 AMP P P1 GY GY THERMAL PROTECTOR PRIMARY INTERLOCK SW. R (C) (N.O.) R R R MONITOR SW. LIGHT SW. (N.O.) (N.C.) (N.C.) (C)(C) (C) Y OR START SWITCH COOK RELAY 5 3 7 8 OR Y Y Y DEFROST SWITCH CONTROL MODULE OR-W OR-W Y G W SELECTOR RESISTOR10 4 3 2 1 MOTOR TIMER/DEFROST SELECTOR BU W W W Y MOTOR FAN MOTOR OVEN LIGHT (N.O.) SECONDARY INTERLOCK SW. OL OL1 BK BK L1 N 120 VAC G
  • 39. 36 You can see the potential circuit to the start switch. BK-W TF1 TF F F1 THERMAL FUSE FUSE 15 AMP P P1 GY GY THERMAL PROTECTOR PRIMARY INTERLOCK SW. R (C) (N.O.) R R R MONITOR SW. LIGHT SW. (N.O.) (N.C.) (N.C.) (C)(C) (C) Y OR START SWITCH COOK RELAY 5 3 7 8 OR Y Y Y DEFROST SWITCH CONTROL MODULE OR-W OR-W Y G W SELECTOR RESISTOR10 4 3 2 1 MOTOR TIMER/DEFROST SELECTOR BU W W W Y MOTOR FAN MOTOR OVEN LIGHT (N.O.) SECONDARY INTERLOCK SW. OL OL1 BK BK L1 N 120 VAC G
  • 40. 37 BK-W TF1 TF F F1 THERMAL FUSE FUSE 15 AMP P P1 GY GY THERMAL PROTECTOR PRIMARY INTERLOCK SW. R (C) (N.O.) R R R MONITOR SW. LIGHT SW. (N.O.) (N.C.) (N.C.) (C)(C) (C) Y OR START SWITCH COOK RELAY 5 3 7 8 OR Y Y Y DEFROST SWITCH CONTROL MODULE OR-W OR-W Y G W SELECTOR RESISTOR10 4 3 2 1 MOTOR TIMER/DEFROST SELECTOR BU W W W Y MOTOR FAN MOTOR OVEN LIGHT (N.O.) SECONDARY INTERLOCK SW. OL OL1 BK BK L1 N 120 VAC G Now, with the door is open and the microwave still OFF. TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE.
  • 41. 38 BK-W TF1 TF F F1 THERMAL FUSE FUSE 15 AMP P P1 GY GY THERMAL PROTECTOR PRIMARY INTERLOCK SW. R (C) (N.O.) R R R MONITOR SW. LIGHT SW. (N.O.) (N.C.) (N.C.) (C)(C) (C) Y OR START SWITCH COOK RELAY 5 3 7 8 OR Y Y Y DEFROST SWITCH CONTROL MODULE OR-W OR-W Y G W SELECTOR RESISTOR10 4 3 2 1 MOTOR TIMER/DEFROST SELECTOR BU W W W Y MOTOR FAN MOTOR OVEN LIGHT (N.O.) SECONDARY INTERLOCK SW. OL OL1 BK BK L1 N 120 VAC G
  • 42. 39 BK-W TF1 TF F F1 THERMAL FUSE FUSE 15 AMP P P1 GY GY THERMAL PROTECTOR PRIMARY INTERLOCK SW. R (C) (N.O.) R R R MONITOR SW. LIGHT SW. (N.O.) (N.C.) (N.C.) (C)(C) (C) Y OR START SWITCH COOK RELAY 5 3 7 8 OR Y Y Y DEFROST SWITCH CONTROL MODULE OR-W OR-W Y G W SELECTOR RESISTOR10 4 3 2 1 MOTOR TIMER/DEFROST SELECTOR BU W W W Y MOTOR FAN MOTOR OVEN LIGHT (N.O.) SECONDARY INTERLOCK SW. OL OL1 BK BK L1 N 120 VAC G Great! Now with the door shut, turn the microwave ON. TRACE THE ACTIVE CIRCUITS BELOW WITH A WAVY LINE. Remember, when the Push-to-Start switch is briefly closed, the COOK RELAY is energised.
  • 43. 40 BK-W TF1 TF F F1 THERMAL FUSE FUSE 15 AMP P P1 GY GY THERMAL PROTECTOR PRIMARY INTERLOCK SW. R (C) (N.O.) R R R MONITOR SW. LIGHT SW. (N.O.) (N.C.) (N.C.) (C)(C) (C) Y OR START SWITCH COOK RELAY 5 3 7 8 OR Y Y Y DEFROST SWITCH CONTROL MODULE OR-W OR-W Y G W SELECTOR RESISTOR10 4 3 2 1 MOTOR TIMER/DEFROST SELECTOR BU W W W Y MOTOR FAN MOTOR OVEN LIGHT (N.O.) SECONDARY INTERLOCK SW. OL OL1 BK BK L1 N 120 VAC G
  • 44. 41 On this page we show symbols for a switch used on an air conditioner. NOTE: The black dots within the switch indicate a junction, but when a switch function is chosen, all other dots except those on a horizontal line with the chosen function must be ignored. If the switch is set on HI FAN, the circuit through the switch is shown below. If the switch is set on HI COOL, draw the circuit through the switch below. If the switch is set on LO COOL, draw the circuit through the switch below. LO COOL HI COOL HI FAN OFF L1 2 1 3 L2 SWITCH LO COOL HI COOL HI FAN OFF L1 2 1 3 L2 SWITCH LO COOL HI COOL HI FAN OFF L1 2 1 3 L2 SWITCH
  • 45. 42 HI COOL LO COOL LO COOL HI COOL HI FAN OFF L1 2 1 3 L2 SWITCH LO COOL HI COOL HI FAN OFF L1 2 1 3 L2 SWITCH
  • 46. 43 Now that you know how to trace a circuit through the air conditioner switch, we want you to trace out a complete circuit. TRACE A WAVY LINE BELOW THROUGH CIRCUITS WHICH ARE ACTIVE WHEN THE SWITCH IS ON THE HI FAN POSITION. COMPRESSOR BR BK Y RUN CAPACITOR BK TEMP. CONTROL MARKED TERM. BR P C W H L FAN MOTOR FAN MOTOR RUN CAPACITOR BL OR W L2 L1 2 1 3 SWITCH RIBBED SERVICE CORD LO COOL HI COOL HI FAN OFF
  • 47. 44 NOTE THE CIRCUIT THROUGH THE FAN MOTOR. DID YOU GET IT RIGHT? COMPRESSOR BR BK Y RUN CAPACITOR BK TEMP. CONTROL MARKED TERM. BR P C W H L FAN MOTOR FAN MOTOR RUN CAPACITOR BL OR W L2 L1 2 1 3 SWITCH RIBBED SERVICE CORD LO COOL HI COOL HI FAN OFF
  • 48. 45 The fan circuit in the HI COOL and the HI FAN postions will be the same. Remember that this air conditioner temperature control switch (thermostat) closes on heat rise. TRACE A WAVY LINE BELOW THROUGH THE ACTIVE CIRCUITS IN THE HI COOL SETTING. COMPRESSOR BR BK Y RUN CAPACITOR BK TEMP. CONTROL MARKED TERM. BR P C W H L FAN MOTOR FAN MOTOR RUN CAPACITOR BL OR W L2 L1 2 1 3 SWITCH RIBBED SERVICE CORD LO COOL HI COOL HI FAN OFF
  • 49. 46 NOTE THAT NEITHER THE COMPRESSOR OR THE FAN MOTOR USES A START RELAY. THESE MOTORS ARE OF THE PSC (permanent split capacitor) TYPE. COMPRESSOR BR BK Y RUN CAPACITOR BK TEMP. CONTROL MARKED TERM. BR P C W H L FAN MOTOR FAN MOTOR RUN CAPACITOR BL OR W L2 L1 2 1 3 SWITCH RIBBED SERVICE CORD LO COOL HI COOL HI FAN OFF
  • 50. 47 You knew we would want you to trace the LO COOL circuit, too! TRACE A WAVY LINE BELOW THROUGH THE ACTIVE CIRCUITS IN THE LO COOL SETTING. WATCH CAREFULLY AS YOU TRACE THE CIRCUIT THROUGH THE FAN. COMPRESSOR BR BK Y RUN CAPACITOR BK TEMP. CONTROL MARKED TERM. BR P C W H L FAN MOTOR FAN MOTOR RUN CAPACITOR BL OR W L2 L1 2 1 3 SWITCH RIBBED SERVICE CORD LO COOL HI COOL HI FAN OFF
  • 51. 48 Y BK COMPRESSOR BR BK RUN CAPACITOR TEMP. CONTROL MARKED TERM. BR P C W H L FAN MOTOR FAN MOTOR RUN CAPACITOR BL OR W L2 L1 2 1 3 SWITCH RIBBED SERVICE CORD LO COOL HI COOL HI FAN OFF
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