ZB80281_W10177459A.vp W10177459A Whirlpool Duet Sport Dryer Tech Sheet
2013-05-09
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TECH SHEET - DO NOT DISCARD PAGE 1 pressed into connector far enough to engage metal barbs. 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. IMPORTANT Electrostatic Discharge Sensitive Electronics (ESD) ESD problems are present everywhere. ESD may damage or weaken the machine control electronics. The new control assembly may appear to work well after repair is finished, but failure may occur at a later date due to ESD stress. ■ Use an anti-static wrist strap. Connect wrist strap to green ground connection point or unpainted metal in the appliance -OR- Touch your finger repeatedly to a green ground connection point or unpainted metal in the appliance. ■ Before removing the part from its package, touch the anti-static bag to a green ground connection point or unpainted metal in the appliance. ■ Avoid touching electronic parts or terminal contacts; handle machine control electronics by edges only. ■ When repackaging failed machine control electronics in anti-static bag, observe above instructions. DIAGNOSTIC GUIDE Before servicing, check the following: ■ Make sure there is power at the wall outlet. ■ Has a household fuse blown or circuit breaker tripped? Was a regular fuse used? Use a time-delay fuse. ■ Is dryer vent properly installed and clear of lint or obstructions? ■ All tests/checks should be made with a VOM (volt-ohm-milliammeter) or DVM (digitalvoltmeter) having a sensitivity of 20,000 Ω per volt DC or greater. ■ Check all connections before replacing components. Look for broken or loose wires, failed terminals, or wires not pressed into connectors far enough. ■ A potential cause of a control not functioning is corrosion on connections. Observe connections and check for continuity with an ohmmeter. ■ Connectors: Look at top of connector. Check for broken or loose wires. Check for wires not ■ Resistance checks must be made with dryer unplugged or power disconnected. DIAGNOSTIC: Console Buttons and Indicators Pressing buttons and rotating the cycle selector will turn off the corresponding indicator and sound a beep as shown in figure 1, page 2. DIAGNOSTIC TESTS ✔ Pressing These tests allow service personnel to test and verify all inputs to the machine control electronics. You may want to do a quick and overall checkup of the dryer with these tests before going to specific troubleshooting tests. ✔ Pressing ACTIVATING THE DIAGNOSTIC TEST MODE 1. Be sure the dryer is in standby mode (plugged in with all indicators off, or with only the Done indicator on). (more time) will toggle the left digit and colon on the display while sounding a beep. (less time) will toggle the right two digits on the display while sounding a beep. ✔ Electric Models Only: Pressing the Wrinkle Shield button will activate the Inlet Air Flow Test. See DIAGNOSTIC: Displaying Inlet Air Flow, page 2. ✔ Pressing the Cycle Signal button will acti- vate the Line Voltage Test. See DIAGNOSTIC: Displaying Line Voltage, page 2. 2. Select any one button (except Pause/Cancel and Controls Lock/Unlock) and follow the steps below, using the same button (remember the button): ➔ If indicators fail to come on and beep after Press/ Release Press/ Release Press/ hold 2 ➔ for 2 ➔ hold 2 ➔ for 2 ➔ hold 2 seconds seconds seconds seconds seconds DIAGNOSTIC: Door Switch 3. If this test mode has been entered successfully, all indicators on the console are illuminated for 5 seconds with 8:88 showing in the Estimated Time Remaining three-digit display. If there are no saved fault codes or active fault codes, all indicators on the console will momentarily turn off, then stay on with 8:88 displayed. Continue with diagnostics. 4. If entry into Diagnostic Test Mode is unsuccessful, choose a different button (except Pause Cancel and Controls Lock/Unlock) and repeat step 2. ➔ If no indicators come on after repeating step 2 using a different button, go to TEST #1, page 4. DIAGNOSTIC: Active Fault Codes If there is an active fault code, it will be flashing in the display. Review the Display Fault/Error Codes table, page 3, for the recommended procedure. If there is no active fault code, 8:88 will be displayed and all of the indicator lights will be turned on. DIAGNOSTIC: Saved Fault Codes If there are saved fault codes, the most recent fault code will show “F:” and flash “XX” where XX is the fault code. Press and release beep Second most recent the same button ➔ ➔ tone used to activate fault code is displayed. diagnostics beep Third most recent fault Repeat ➔ ➔ tone code is displayed. beep Fourth most recent Repeat ➔ ➔ tone fault code is displayed. All indicators momentarily turn Repeat ➔ off, then stay on. FOR SERVICE TECHNICIAN’S USE ONLY pressing buttons and rotating the cycle selector, go to TEST #6, page 8. Opening the door should cause a beep and an alphanumeric number (such as P:3E ) to be displayed. Closing the door should cause a beep and 8:88 to be displayed. ➔ If opening the door fails to cause a beep and a number and letter to be displayed, go to TEST #7, page 9. NOTE: Opening the door while in Diagnostic Test Mode may not activate the drum light. The light will come on when Start is pressed, or upon opening the door after the Diagnostic Test Mode has been canceled. DIAGNOSTIC: Moisture Sensor Open the door and locate two metal strips on the inside of the dryer. Using a wet cloth or one finger, jointly touch both strips. ➔ If a continuous beep tone is heard and an alphanumeric number is displayed on the console, the sensor is OK. ➔ If a continuous beep tone is not heard, or if a continuous beep tone is heard before touching both moisture strips, go to TEST #5, page 8. DIAGNOSTIC: Motor, Heater, and Console ID Close the door. Press the Start button. The motor and heater will turn on. Continuing to press the Start button will display the project codes and software revisions. These codes are not relevant to the service of the machine and can be ignored. NOTE: The console buttons only control the indicator lights in Diagnostic Test Mode. When the buttons are pressed the corresponding features will not be activated. ➔ If the motor does not turn on, go to TEST #3, page 5. ➔ If no heat is detected, go to TEST #4, page 6. PART NO. W10177459A TECH SHEET - DO NOT DISCARD Power button controls its own indicator and Cycle Status LEDs. PAGE 2 Start button controls its own indicator, starts dryer and displays version information. “Less Time” button turns the middle and right digit of the display on or off. “More Time” button turns the left digit and colon of the display on or off. Wrinkle Shield button controls its own indicator and starts Inlet Air Flow Diagnostic. Button Controls Lock/Unlock button controls LED below button. Rotating this Cycle Selector turns cycle LEDs on or off. Turns off all LEDs and exits diagnostics. Drum Light button controls LED below button. Each button controls all LEDs above button (Green-Amber-Off). Cycle Signal button Button Sound button controls all LEDs controls all LEDs above button above button (Green-Amber-Off) (Green-Amber-Off). and starts displaying Line Voltage Diagnostic. Figure 1. Console Diagnostics. DIAGNOSTIC: Displaying Inlet Air Flow (Electric Models Only) Used to display the air flow value at the inlet of the heater box being measured by the machine control. After entering the Diagnostic Test Mode, waiting for the 5 second delay, and cycling through any saved fault codes, press the Wrinkle Shield button to activate air flow detection. A 30 or 50 second countdown timer will start and the dryer will turn on. ➔ If the dryer is cold, the countdown will start at 50 seconds. NOTE: If the dryer is extremely cold (less than 40°F [4.4°C]) the air flow may not be detected properly, and “--” will be displayed. ➔ If the dryer is hot, the countdown timer will start at 30 seconds (cool down period) followed by an additional 50 second countdown. A Dryness Level modifier LED will also be illuminated to indicate the air flow range corresponding to the number displayed. The motor starts right away, the “Sensing” Status LED comes on, and “0” (zero) is displayed (this step starts the Manual Load sequence): DIAGNOSTIC: Displaying Line Voltage Used to display the line voltage currently being measured by the machine control: After entering the Diagnostic Test Mode, waiting for the 5 second delay, and cycling through any saved fault codes, press the Cycle Signal button. The voltage value will be displayed. 1. Now press any key (except Pause/Cancel and Controls Lock/Unlock) and the control will advance through each step of the following sequence: ➔ If the line voltage is not seen on L2, the display will flash L2. Go to TEST #1, page 4. DEACTIVATING THE DIAGNOSTIC TEST MODE Motor turns “Sensing” Status 0:00 is ➔ ➔ on. LED turns on. displayed. Press the Pause/Cancel button to exit diagnostics. “Damp” 2. Motor + heater. ➔ Status LED turns on. ACTIVATING THE MANUAL LOAD TEST 3. 1. Be sure the dryer is in standby mode (plugged in with all indicators off, or with only the Done indicator on). “Cool Down” Motor + heater 0:03 is ➔ Status LED ➔ + drum light. displayed. turns on. 4. All loads turn off. 2. Select any one button (except Pause/Cancel and Controls Lock/Unlock) and follow the steps below, using the same button (remember the button): DEACTIVATING THE MANUAL LOAD TEST ■ The More LED will be illuminated for air flow readings above 40 cfm. ■ The Normal LED will be illuminated for air flow readings between 29 and 40 cfm. ■ The Less LED will be illuminated for air flow readings less than 29 cfm. ➔ If air flow value is low (Less LED is lit), a. b. c. d. e. f. g. Press/hold 2 seconds Release for 2 seconds Press/hold 2 seconds Release for 2 seconds Press/hold 2 seconds Release for 2 seconds Press/hold 2 seconds “Done” ➔ Status LED turns on. ➔ ➔ 0:02 is displayed. 0:04 is displayed. Press the Pause/Cancel button to exit this mode. check to make sure the lint screen is clean, the door seal is in place and the vent is not obstructed. FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10177459A TECH SHEET - DO NOT DISCARD PAGE 3 DISPLAY FAULT/ERROR CODES See Accessing & Removing the Electronic Assemblies, page 9, to access: ■ Machine Control Electronics ■ Console Electronics and Housing The fault codes below would be indicated when attempting to start a drying cycle, or after activating the Diagnostic Test Mode. Display PF L2 AF F:01 F:02 F:20 F:22 F:23 F:24 F:25 F:26 F:28 F:29 Description Explanation / Recommended Procedure PF flashes to indicate that a power failure occurred while the dryer was running. ■ Press Start to continue the cycle, or press Pause/Cancel to clear the display. L2 flashes if low line voltage (less than 30 V) is detected at installation. ■ Check to see if a household fuse has blown or a circuit breaker has tripped. ■ Confirm the power cord is properly inLow Line stalled and plugged into the power outlet. Voltage ■ Check the relay connections on the machine control electronics. ■ Gas Models Only: Check the P14 connection on the machine control electronics. AF flashes if low inlet air flow is detected at install. Low Air Flow ■ Check to see if the vent run from the Condition dryer to the wall is crushed. ■ Perform steps under DIAGNOSTIC: Displaying Inlet Air Flow, page 2. F:01 flashes when there is a primary control failure. Primary Control ■ Replace the machine control electronics. Failure See Accessing & Removing the Electronic Assemblies, page 9. F:02 flashes when there is a stuck button or user interface mismatch. This fault code Keypad/ User Interface appears ONLY when in the Diagnostic Test Mode. Failure ■ See TEST #6, page 8. F:20 flashes if no voltage is detected at the heater relay. This fault code appears ONLY when in the Diagnostic Test Mode. Heater Failure ■ Check that the wires are plugged in on the heater assembly and at the relay on the electronic control. Outlet F:22 flashes if the outlet thermistor is open. Thermistor ■ See TEST #4a, page 7. Open F:23 flashes if the outlet thermistor has Outlet shorted. Thermistor Shorted ■ See TEST #4a, page 7. F:24 flashes if the inlet thermistor is open. Inlet This fault code appears ONLY when in the Thermistor Diagnostic Test Mode. Open ■ See TEST #4a, page 7. F:25 flashes if the inlet thermistor is Inlet shorted. This fault code appears ONLY Thermistor when in the Diagnostic Test Mode. Shorted ■ See TEST #4a, page 7. F:26 flashes if there is a motor drive Motor Drive system failure. System Failure ■ See TEST #3, page 5. F:28 flashes if the moisture sensor strip is open. This fault code appears ONLY when Moisture Sensor Open in the Diagnostic Test Mode. ■ See TEST #5, page 8. F:29 flashes if the moisture sensor strip Moisture has shorted. This fault code appears ONLY Sensor when in the Diagnostic Test Mode. Shorted ■ See TEST #5, page 8. Power Failure FOR SERVICE TECHNICIAN’S USE ONLY See Removing the Back Panel, page 11, to access: ■ Drum Light Assembly ■ Blower Motor Assembly Door Switch See Removing the Toe Panel, page 9, to access: ■ Moisture Sensors ■ Outlet Thermistor ■ Thermal Cut-off ■ Inlet Thermistor/High Limit Thermostat Assembly (Electric Models) ■ High Limit Thermostat (Gas Models) ■ Heater Assembly (Electric or Gas) ■ Thermal Fuse Heater Assembly Moisture Sensor Strips Figure 2. Component locations. Display F:30 F:31 F:70 F:71 F:72 through F:78 Description Explanation / Recommended Procedure F:30 flashes if a restricted air flow condition exists. This fault code appears ONLY when in the Diagnostic Test Mode. Restricted ■ Check to make sure the lint screen is clean, the door seal is Air Flow Condition in place and the vent is not obstructed. ■ See DIAGNOSTIC: Displaying Inlet Air Flow, page 2. F:31 flashes if a low voltage condition (less than 30 V) has been detected. This fault code appears ONLY when in the Diagnostic Test Mode. L2 ■ Check to see if a household fuse has blown or a circuit Line Voltage breaker has tripped. Error ■ Confirm the power cord is properly installed and plugged into the power outlet. ■ Check the relay connections on the electronic control. F:70 / F:71 flashes when there is no communication between No the machine control and the console electronics. Communication ■ Check console electronics harness connections to the Between machine control. Electronic ■ Replace the machine control electronics. See Accessing & Assemblies Removing the Electronic Assemblies, page 9. Console Electronics Failure F:72 through F:78 flashes when there is a console electronics failure. ■ Replace the console electronics. See Accessing & Removing the Electronic Assemblies, page 9. PART NO. W10177459A TECH SHEET - DO NOT DISCARD PAGE 4 TROUBLESHOOTING GUIDE TROUBLESHOOTING TESTS Some tests will require accessing components. See figure 2, page 3, for component locations. NOTE: These checks are done with the dryer unplugged or disconnected from power. Problem Possible Cause / Test NOTE: Possible Cause/Tests MUST be performed in the sequence shown for each problem. Won’t power up. (No response when buttons are pressed.) 1. Supply connections. See TEST #1, at right. 2. Check harness connections. 3. Console electronics and housing assembly. See TEST #6, page 8. TEST #1 Supply Connections This test assumes that proper voltage is present at the outlet, and visual inspection indicates that the power cord is securely fastened to the terminal block (electric dryer) or wire harness connection (gas dryer). Cover Plate Figure 3. Remove the cover plate. Won’t shut off when expected. 1. Check Pause/Cancel button. 2. Console electronics and housing assembly. See TEST #6, page 8. 3. Moisture sensor. See TEST #5, page 8. Control won’t accept selections. Console electronics and housing assembly. See TEST #6, page 8. Won’t heat. 1. Heater. See TEST #4, page 6. 2. Check harness connections. 3. See DIAGNOSTIC: Displaying Line Voltage, page 2. 4. Check installation. Heats in air cycle. Heater. See TEST #4, page 6. ELECTRIC DRYER: 1. Unplug dryer or disconnect power. 2. Remove the cover plate from the top right corner of the back of the dryer. See figure 3. 3. With an ohmmeter, check for continuity between the neutral (N) terminal of the plug and the center contact on the terminal block. See figure 4. ➔ If there is no continuity, replace the power cord and test the dryer. ➔ If there is continuity, go to step 4. 4. In a similar way, check which terminal of the plug is connected to the left-most contact on the terminal block and make a note of it. This will be L1 (black wire) in the wiring diagram. See figure 4. Shuts off before clothes are dry. N 1. Check the dryness setting for auto cycles. 2. Check for full lint screen. 3. See DIAGNOSTIC: Displaying Inlet Air Flow, page 2. 4. Check for clogged vent. 5. Moisture sensor. See TEST #5, page 8. 6. Dryness level adjust. See TEST #5a, page 8. Pushing Power button causes dryer to beep, but no indicators light. ➔ If there is continuity, go to step 7. ➔ If there is no continuity, check that wires to the terminal block are mechanically secure. If so, replace the main wire harness and test the dryer. 7. Check for continuity between the neutral (N) terminal of the plug and P8-3 (white wire) on the machine control board. ➔ If there is continuity, go to step 8. Remove Screw Won’t start cycle when Start button is pressed. 1. If number display flashes, check to be sure the door is completely shut, and press and hold down Start for about 1 second. 2. See TEST #3, page 5. 3. See TEST #7, page 9. 6. With an ohmmeter, check for continuity between the L1 terminal of the plug (found in step 4) and P9-2 (black wire) on the machine control board. See figure 17, page 10. Power Cord Plug L1 connections of the wire are secure, replace the main wire harness. 8. Visually check that the P5 connector is inserted all the way into the machine control electronics. 9. Visually check that the console electronics and housing assembly is properly inserted into the front console. 10. If both visual checks pass, replace the console electronics and housing assembly. 11. Plug in dryer or reconnect power. 12. Perform steps under DIAGNOSTIC: Console Buttons and Indicators, page 1, to verify repair. 13. If indicators still do not light, perform TEST #2, page 5. GAS DRYER: 1. Unplug dryer or disconnect power. 2. Remove the cover plate from the top right corner of the back of the dryer. See figure 3. 3. Check that the power cord is firmly connected to the dryer’s wire harness. See figure 5. Terminal Block Wire Harness COM Figure 4. Plug-to-terminal connections for electric dryer. 1. Check console electronics harness connections to the machine control. 2. Replace machine control electronics. See Accessing & Removing the Electronic Assemblies, page 9. ➔ If there is no continuity and the mechanical ➔ When this is found, go to step 5. ➔ If neither of the plug terminals have continuity with the left-most contact of the terminal block, replace the power cord and test the dryer. 5. Access the machine control electronics without disconnecting any wiring to the control board. See Accessing & Removing the Electronic Assemblies, page 9. Power Cord Figure 5. Power cord-to-wire harness connection for gas dryer. 4. Access the machine control electronics without disconnecting any wiring to the control board. See figure 16, page 9. 5. With an ohmmeter, check for continuity between the neutral (N) terminal of the plug and P8-3 (white wire) on the machine control board. The left-hand side of figure 6 shows the position of the neutral terminal (N) on the power cord plug. Also see figure 17, page 10. ➔ If there is continuity, go to step 6. FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10177459A TECH SHEET - DO NOT DISCARD 6. Perform steps under DIAGNOSTIC: Console Buttons and Indicators, page 1, to verify repair. White Connector TEST #3 Motor Circuit This test will check the wiring to the motor and the motor itself. The following items are part of this motor system: COM N L1 G Part of Motor System Harness/connection G Figure 6. Power cord terminals, gas dryer. Thermal fuse Belt/belt switch Drive Motor 6. In a similar way, check the continuity between the L1 terminal of the plug and P9-2 (black wire) on the control board. ➔ If there is continuity, go to step 8. ➔ If there is no continuity, check the continuity of the power cord in a similar way to that illustrated in figure 6, but for power cord’s L1 wire. ➔ If an open circuit is found, replace the power cord. Otherwise, replace the main harness. Centrifugal switch Door switch Machine control electronics. See ESD information, page 1. 8. Visually check that the console electronics and housing assembly is properly inserted into the front console. 9. If both visual checks pass, replace the console electronics and housing assembly. This test is used to determine if power is present at the machine control electronics. This test assumes that TEST #1 has been completed. ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ no ✔ ✔ ✔ ✔ ✔ ➔ If resistance across P8-4 and P9-1 is in the 6. Remove the bare copper wire terminal from pin 5 of black drive motor switch. See figure 9. Main Winding: Lt. Blue Wire in Back and Bare Copper Wire Start Winding: Lt. Blue Wire in Back and Bare Copper Wire ➔ Otherwise, go to step 3. 3. Check the wiring and components in the path between these measurement points by referring to the appropriate wiring diagram (gas or electric) on page 12. ELECTRIC DRYER ONLY: Check the thermal fuse. See TEST #4b, page 7. ALL DRYERS: Continue with step 4 below to test the remaining components in the motor circuit. 4. Check the belt switch and drive motor. Access the belt switch and drive motor by removing the back panel. See Removing the Back Panel, page 11. Slowly remove the drum belt from the spring-loaded belt switch pulley, gently letting the belt switch pulley down. See figure 7. Figure 9. Main and start winding measure points. 7. Using figure 9, check for the resistance values of the motor’s Main and Start winding coils as shown in the following table. NOTE: Main and Start winding coils must be checked at the motor. Winding Resistance 1. Plug in dryer or reconnect power. 2. Open the door. Contact Points of Measurement MAIN 3.3–3.6 Lt. blue wire in back at pin 4 and bare copper wire terminal removed from pin 5 of black drive motor switch START 2.7–3.0 Lt. blue wire in back at pin 4 and bare copper wire terminal on pin 3 of black drive motor switch Belt Switch Pulley NOTE: The drum light is controlled by the machine control on all models. ➔ If the resistance at the motor is correct, ➔ If the drum light illuminates, then power is there is an open circuit between the motor and machine control electronics. Check for failed belt switch. present at the machine control. Go to step 3. Drum Belt ➔ If the drum light fails to illuminate, the problem may be as simple as a bad bulb. Replace bulb with a working bulb. If drum light still fails to illuminate, continue with step 3. Figure 8. Remove white connector. range of 1 to 6 Ω, replace the machine control electronics. 11. Perform steps under DIAGNOSTIC: Console Buttons and Indicators, page 1, to verify repair. TEST #2 Machine Control Power Check Gas Dryer 2. Access the machine control electronics and measure the resistance across P8-4 and P9-1. See Accessing & Removing the Electronic Assemblies, page 9. 10. Plug in dryer or reconnect power. 12. If indicators still do not light, perform TEST #2. Electric Dryer 1. Unplug dryer or disconnect power. 7. Visually check that the P5 connector is inserted all the way into the machine control electronics. 3. Unplug dryer or disconnect power. Drive Motor Switch 5. Plug in dryer or reconnect power. 5 1 26 4 3 Power Cord Plug N L1 4. Replace the machine control electronics. 1 wire of the harness from the power cord at the location illustrated in figure 5. Test the continuity of the power cord neutral wire as illustrated in figure 6. If an open circuit is found, replace the power cord. Otherwise, go to step 6. 264 3 5 ➔ If there is no continuity, disconnect the white PAGE 5 Figure 7. Slowly remove drum belt. 5. Remove the white connector from the drive motor switch. See figure 8. FOR SERVICE TECHNICIAN’S USE ONLY ➔ If the Start winding resistance is much greater than 3 Ω, replace the motor. 8. Check the belt switch by measuring resistance between the two light blue wires, as shown in figure 10, page 6, while pushing up the belt switch pulley. PART NO. W10177459A TECH SHEET - DO NOT DISCARD PAGE 6 4. Visually check the wire connections to the thermal cut-off, high limit thermostat, and heater. If connections look good, check for continuity across each of these components. ➔ Replace the heater if it is electrically open. 5 1 26 4 3 Lt. Blue Wires Belt Switch Pulley ➔ Replace both the thermal cut-off and inlet thermistor/high limit thermostat assembly if either the thermal cut-off or the high limit thermostat is electrically open. 5. If no open circuit is detected, remove the P4 connector, then measure the resistance between P4-3 (red wire) and P4-6 (red wire) at the connector. See figure 17, page 10, for connector location; and Accessing & Removing the Electronic Assemblies, page 9. Belt Switch Figure 10. Checking the belt switch. ➔ If 5–15 kΩ are measured, replace the machine control electronics. ➔ If the resistance reading goes from infinity ➔ If the resistance is less than 1 kΩ, replace to a few ohms as pulley arm closes the switch, belt switch is OK. If not, replace the belt switch. the outlet thermistor. GAS DRYER: ➔ If belt switch is OK and there is still an open 1. Unplug dryer or disconnect power. circuit, check and repair the wiring harness. 2. Remove the toe panel to access the thermal components. See Removing the Toe Panel, page 9. 9. Door Switch problems can be uncovered by following procedure under DIAGNOSTIC: Door Switch, page 1; however, if this was not done, the following can be done without applying power to the dryer. Connect an ohmmeter across P8-3 (neutral, white wire) and P8-4 (door, tan wire). 3. Perform TEST #4b, page 7. If the thermal fuse is OK, go to step 4. 4. Perform TEST #4c, page 7. If the thermal cut-off is OK, go to step 5. ➔ With the door properly closed, the ohmme- 5. Locate the high limit thermostat. See figure 11. Measure the continuity through it by connecting the meter probes on the red wire and black wire terminals. ter should indicate a closed circuit (0–2 Ω). ➔ If not, replace the door switch assembly. TEST #4 Heater ➔ If there is an open circuit, replace the high This test is performed when either of the following situations occur: ➔ Otherwise, go to step 6. limit thermostat and the thermal cut-off. 6. Perform TEST #4d, page 8. If this is OK, replace the machine control electronics. ✔ Dryer does not heat ✔ Heat will not shut off Heat will not shut off: This test checks the components making up the heating circuit. The following items are part of this system: Part of Heating System Harness/connection Heater relay Thermal cut-off Thermal fuse Inlet thermistor/high limit thermostat assembly high limit thermostat Heat element assembly Gas burner assembly Centrifugal switch Outlet thermistor Machine control electronics. See ESD information, page 1. Console electronics and housing assembly Gas supply 1. Unplug dryer or disconnect power. Electric Gas Dryer Dryer ✔ ✔ ✔ no ✔ ✔ ✔ ✔ ✔ no no ✔ no ✔ ✔ ✔ ✔ no ✔ ✔ ✔ ✔ ✔ ✔ no ✔ Figure 11. Thermal Components, viewed from front. Dryer does not heat: Locate the components using figure 11. ELECTRIC DRYER: 1. Unplug dryer or disconnect power. 2. Remove the toe panel to access the thermal components. See Removing the Toe Panel, page 9. 3. Using an ohmmeter and referring to the wiring diagram, measure the resistance from the red wire terminal at the thermal cut-off to the red wire terminal at the heater. FOR SERVICE TECHNICIAN’S USE ONLY 2. Access the machine control electronics. See figure 17, page 10, for connector location; and Accessing & Removing the Electronic Assemblies, page 9. ELECTRIC DRYER: Remove the P4 connector, then measure the resistance between P4-3 (red wire) and P4-6 (red wire) at the connector. GAS DRYER: Remove the P14 connector, then measure the resistance between P14-3 (red-white wire) and P14-6 (red-white wire) at the connector. ALL DRYERS: ➔ If 5–15 kΩ are measured, replace the machine control electronics. ➔ If the resistance is greater than 20 kΩ, replace the outlet thermistor. ➔ If the resistance is about 10 Ω, go to step 5. ➔ If an open circuit is detected, go to step 4. PART NO. W10177459A TECH SHEET - DO NOT DISCARD PAGE 7 ➔ If resistance is greater than 0 (zero), replace TEST #4a Thermistors wiring harness. INLET THERMISTOR RESISTANCE TEMP. °F (°C) Outlet Thermistor ALL DRYERS: The machine control electronics monitors the exhaust temperature using the outlet thermistor, and cycles the heater relay on and off to maintain the desired temperature. The following table gives temperatures and their associated resistance values. RES. RANGE kΩ TEMP. °F (°C) 68° (20°) 61.2–63.7 131° (55°) 14.6–15.3 77° (25°) 49.0–51.0 140° (60°) 12.1–12.8 OUTLET THERMISTOR RESISTANCE Begin with an empty dryer and a clean lint screen. TEMP. °F (°C) 1. Plug in dryer or reconnect power. RES. RANGE kΩ TEMP. °F (°C) RES. RANGE kΩ 86° (30°) 39.5–41.1 149° (65°) 10.2–10.7 95° (35°) 32.0–33.3 158° (70°) 8.5–9.0 104° (40°) 26.1–27.2 167° (75°) 7.2–7.6 6.1–6.5 2. Start the Timed Dry cycle. 50° (10°) 19.0–22.0 80° (27°) 8.5–10.5 3. If after 60 seconds, F:22 or F:23 flashes in the display and the dryer shuts off, the thermistor or wire harness is either open or shorted. 113° (45°) 21.4–22.3 176° (80°) 60° (16°) 14.8–16.8 90° (32°) 6.8–8.8 122° (50°) 17.6–18.5 70° (21°) 11.5–13.5 100° (38°) 5.0–7.0 ➔ If the thermistor resistance does not agree ➔ Unplug dryer or disconnect power. with table, replace the outlet thermistor. ➔ Check wire connections at the machine control electronics and thermistor. See Accessing & Removing the Electronic Assemblies, page 9, and for thermistor location see figure 11, page 6. ➔ If wire connections are OK, check the outlet thermistor resistance per step 5. 4. If F:22 or F:23 does not flash in the display, the connections to the thermistor are good. Therefore, check the exhaust temperature value at any or all of the temperature levels in question, using the Timed Dry cycle, and the following process: Hold a glass bulb thermometer capable of reading from 90° to 180°F (32° to 82°C) in the center of the exhaust outlet. The correct exhaust temperatures are as follows: ➔ If the thermistor resistance checks agree with the measurements in the table, replace the machine control electronics. Inlet Thermistor, Electric Dryer The machine control electronics monitors the inlet temperature using an inlet thermistor that is part of the high limit thermostat assembly. 1. Activate the Diagnostic Test Mode. See procedure on page 1. 2. If F:24 or F:25 is a displayed error in the Diagnostic Test Mode, the inlet thermistor or wire harness is either open or shorted. ➔ Unplug dryer or disconnect power. ➔ Check wire connections at the machine control electronics and inlet thermistor. See Accessing & Removing the Electronic Assemblies, page 9, and for inlet thermistor location see figure 11, page 6. EXHAUST TEMPERATURES TEMPERATURE HEAT TURNS OFF* SETTING °F (°C) High Medium Low Extra Low HEAT TURNS ON °F (°C) ➔ If wire connections are good, remove the 155°±5° (68°±3°) 10–15° (6–8°) 140°±5° (60°±3°) below the 125°±5° (52°±3°) heat turn off 105°±5° (41°±3°) temperature * The measured overshoot using the glass bulb thermometer in the exhaust outlet can be 30°F (17°C) higher. 5. If the exhaust temperature is not within specified limits, or you have come here from step 3, perform the following: RES. RANGE kΩ wires from the inlet thermistor/high limit thermostat assembly and replace the assembly. ➔ Plug in dryer or reconnect power. 3. If F:24 or F:25 is not an error that is displayed in the Diagnostic Test Mode, the connections to the thermistor are good. Therefore, check the thermistor’s resistance value, using the following process: ➔ Unplug dryer or disconnect power. NOTE: All thermistor resistance measurements must be made while dryer is unplugged or disconnected from power. ➔ Access the heater assembly. See figure 2, ELECTRIC DRYER: Remove the P4 connector, then measure the resistance between P4-3 (red wire) and P4-6 (red wire) at the connector. ➔ Hold a glass bulb thermometer capable of ➔ If the resistance is OK, check P4-3 and P4-6 ➔ Check the resistance of the inlet thermistor. to machine ground. ➔ If resistance is greater than 0 (zero), replace wiring harness. GAS DRYER: Remove the P14 connector, then measure the resistance between P14-3 (red-white wire) and P14-6 (red-white wire) at the connector. page 3; and Removing the Toe Panel, page 9. reading from 68° to 176°F (20° to 80°C) in the heater assembly See figure 11, page 6, for location. The following table shows the resistance values that should be observed for the various temperatures at the heater assembly. ➔ If the thermistor resistance does not agree with the measurements in the table, replace the inlet thermistor/high limit thermostat assembly. ➔ If the thermistor resistance agrees with the measurements in the table, replace the machine control electronics. TEST #4b Thermal Fuse ELECTRIC DRYER: The thermal fuse is wired in series with the dryer drive motor. GAS DRYER: The thermal fuse is wired in series with the dryer gas valve. ALL DRYERS: 1. Unplug dryer or disconnect power. 2. Access the thermal fuse by first removing the toe panel. See Removing the Toe Panel, page 9; and for thermal fuse location see figure 11, page 6. 3. Using an ohmmeter, check the continuity across the thermal fuse. ➔ If the ohmmeter indicates an open circuit, replace the failed thermal fuse. TEST #4c Thermal Cut-Off If the dryer does not produce heat, check the status of the thermal cut-off. 1. Unplug dryer or disconnect power. 2. Access the thermal cut-off by first removing the toe panel. See Removing the Toe Panel, page 9. 3. Using an ohmmeter, check the continuity across the thermal cut-off. See figure 11, page 6, for location. 4. If the ohmmeter indicates an open circuit, perform the following: ELECTRIC DRYER: Replace the failed thermal cut-off and inlet thermistor/high limit thermostat assembly. In addition, check for blocked or improper exhaust system, or failed heat element. GAS DRYER: Replace the failed thermal cut-off and high limit thermostat. In addition, check for blocked or improper exhaust system. ➔ If the resistance is OK, check P14-3 and P14-6 to machine ground. FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10177459A TECH SHEET - DO NOT DISCARD PAGE 8 TEST #4d Gas Valve, Gas Dryer TEST #5a Adjusting Customer-Focused Drying Modes Drum 1. Unplug dryer or disconnect power. NOTE: If the customer is complaining about the clothes being damp and the moisture sensor passes TEST #5, step 3, the total dry time can be lengthened by changing from a “CF1” (standard auto cycle) to a “CF2” (15% more drying time) or “CF3” (30% more drying time) auto cycle. 2. Access the gas valve by removing the toe panel. See Removing the Toe Panel, page 9. 3. Use an ohmmeter to determine if a gas valve coil has failed. Remove harness plugs. Measure resistance across terminals. Readings should match those shown in the following chart. If not, replace coil. Terminals Resistance 1 to 2 1 to 3 4 to 5 1365 ± 60 560 ± 25 1325 ± 55 FRONT MOVs (Metal Oxide Varistors) Blower Housing IMPORTANT: Be sure all harness wires are looped back through the strain relief after checking or replacing coils. TEST #5 Moisture Sensor NOTE: This test is started with the machine completely assembled. This test is performed when an automatic cycle stops too soon, or runs much longer than expected. NOTE: Dryer will shut down automatically after 2½ hours. Figure 12. Disconnect sensor from wire harness. 5. Access the machine control electronics. See Accessing & Removing the Electronic Assemblies, page 9. Remove connector P13 from the circuit board. Check the main harness connections between the sensor harness and machine control for a short or open circuit. ➔ Replace the main harness if necessary. The following items are part of this system: Harness/connection Metal sensor strips Machine control electronics. See ESD information, page 1. 1. Activate the Diagnostic Test Mode and advance past saved fault codes. See procedure on page 1. ➔ If harness is OK, continue with step 6. 6. Access the moisture sensor by removing the toe panel. See Removing the Toe Panel, page 9. Disconnect the sensor from the wire harness. See figure 12. 7. Measure the resistance across the outermost contacts of the cable that includes the two red MOVs. 2. Open the dryer door. The dryer will beep and an alphanumeric number will be displayed. ➔ If a small resistance is measured, check for debris across moisture strips inside of the drum; clean if debris is present. If debris is not present, replace sensor harness. 3. Locate the two metal sensor strips on the face of the lint screen housing. Using a wet cloth or one finger, jointly touch both strips. ➔ If a small resistance is not measured, ➔ If a beep tone is heard and an alphanumeric number is displayed on the console, the sensor passes the test. Go to step 9. ➔ If a beep tone is not heard, or a continuous beep tone is heard before touching both moisture strips, continue with step 4. NOTE: Over drying may be caused by a short circuit in the sensor system. 4. Access the moisture sensor wires by removing the toe panel. See Removing the Toe Panel, page 9. Disconnect the sensor wires from the harness. See figure 12. Harness Connection continue with step 8. 8. Measure the resistance across each of the outermost contacts and the center terminal (ground connection). ➔ If a resistance less than infinity is measured, replace the sensor harness. 9. If moisture sensor diagnostic test passes, check the thermistor: Perform TEST #4a, page 7. ➔ If the problem persists after replacing the moisture sensor and thermistor, replace the machine control electronics. 1. In Standby mode (dryer plugged in but not powered up), press and hold the Dryness Level button for 5 seconds. The dryer will beep and the current drying mode will be seen on the display. The factory default value is “CF1”. 2. To select a different drying mode, press the Dryness Level button again. The dryer display will flash and show CF2, CF3, or CF1. 3. With the display flashing the selected auto cycle mode, press the Start button to save the drying mode and exit diagnostics (the Start button in this mode does not start a drying cycle). The result will be stored in EEPROM of the control board, and will be retained after a power loss. 4. Press the Pause/Cancel button at any time to cancel changes and exit from this mode. TEST #6 Buttons and Indicators This test is performed when any of the following situations occurs during the Console Buttons and Indicators Diagnostic Test, page 1: ✔ None of the indicators light up ✔ No beep sound is heard ✔ Some buttons do not light indicators None of the indicators light up: 1. See Diagnostic Guide/Before Servicing... on page 1. 2. Perform TEST #1, page 4, to verify supply connections. 3. Perform steps in Accessing & Removing the Electronic Assemblies, page 9, and visually check that the P5 connector is inserted all the way into the machine control electronics. 4. Visually check that the console electronics and housing assembly is properly inserted into the front console. 5. If both visual checks pass, replace the console electronics and housing assembly. 6. Plug in dryer or reconnect power. 7. Perform steps under DIAGNOSTIC: Console Buttons and Indicators, page 1, to verify repair. 8. If indicators still do not light, the machine control electronics has failed: ➔ Unplug dryer or disconnect power. ➔ Replace the machine control electronics. ➔ Plug in dryer or reconnect power. ➔ Perform steps under DIAGNOSTIC: Console Buttons and Indicators, page 1, to verify repair. FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10177459A TECH SHEET - DO NOT DISCARD PAGE 9 No beep sound is heard: ACCESSING & REMOVING THE ELECTRONIC ASSEMBLIES 1. Perform steps in Accessing & Removing the Electronic Assemblies, at right, and visually check that the P5 connector is inserted all the way into the machine control electronics. There are two electronic assemblies: the Machine Control Electronics, and the Console Electronics and Housing. See figure 15. ➔ If visual check passes, replace the console 1. Unplug dryer or disconnect power. electronics and housing assembly. 2. Remove the two rear screws from the top panel, and slide the top panel to the rear to remove. 2. Plug in dryer or reconnect power. 3. Perform steps under DIAGNOSTIC: Console Buttons and Indicators, page 1, to verify repair. 4. If replacing the console electronics and housing assembly failed: Figure 13. Door switch location. ➔ If the connections are OK, replace the wire and door switch assembly and retest. ➔ Unplug dryer or disconnect power. ➔ If wire and door switch assembly have been ➔ Replace the machine control electronics. replaced and dryer still does not start, replace the machine control electronics. ➔ Plug in dryer or reconnect power. ➔ Perform steps under DIAGNOSTIC: Console Buttons and Indicators, page 1, to verify repair. Some buttons do not light indicators: 1. Perform steps in Accessing & Removing the Electronic Assemblies, at right, and visually check that the console electronics and housing assembly is properly inserted into the front console. Console Electronics and Housing Assembly Machine Control Electronics Assembly REMOVING THE TOE PANEL 1. Unplug dryer or disconnect power. 2. Remove two screws below the toe panel. 3. Slide the toe panel down, then pull it out from the bottom. See figure 14. FRONT Figure 15. Locate the electronic assemblies. Flange ➔ If visual check passes, replace the console electronics and housing assembly. Machine Control Electronics 2. Plug in dryer or reconnect power. 3. Perform steps under DIAGNOSTIC: Console Buttons and Indicators, page 1, to verify repair. 1. Perform preceding steps 1 and 2, then remove the two screws that hold the machine control electronics bracket in place. See figure 16. TEST #7 Door Switch 2. Slide the bracket over the top of the drum to access the machine control electronics connectors and mounting screw. See figure 16. Refer to page 1 and perform steps under Activating the Diagnostic Test Mode. Then on the same page perform steps under DIAGNOSTIC: Door Switch. Functionality is verified with a beep each time the door is closed and opened, and an alphanumeric number appears in the display. Figure 14. Pull the toe panel down to clear flange, then pull panel out. If any of the preceding conditions are not met: Machine Control Electronics Bracket Screws FRONT 1. Unplug dryer or disconnect power. 2. Check that the wires between the door switch and machine control electronics are connected. See figure 13 for switch location, and see Accessing & Removing the Electronic Assemblies, at right. Machine Control Electronics Mounting Screw Figure 16. Remove machine control electronics from mounting bracket. FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10177459A TECH SHEET - DO NOT DISCARD PAGE 10 Figure 17. Machine control electronics. 5. The console mounting bracket is fastened to the console front panel with two latches at both sides of the console assembly. Unlatch the bracket gently with a screwdriver while pulling the mounting bracket assembly out. See figure 18. 3. Remove all the wire connections to the machine control electronics. See figure 17. 4. Remove the screw holding the machine control electronics assembly to the mounting bracket. See figure 16. 5. There are two plastic legs on the front of the machine control electronics that slide under the mounting bracket. 6. The console electronics is split into two assemblies connected by two cables. Each assembly is fastened to the decorative piece by four plastic latches. To remove these assemblies, gently compress the plastic latches while pulling up on the assembly. For the cycle selector assembly, the cycle selector knob must first be removed by firmly pulling on it or gently prying it straight upward. See figure 20. ✔ There is one plastic leg on the rear of the machine control electronics that slides under the mounting bracket. ✔ There is a locking tab on the bottom of the machine control electronics that snaps into the mounting bracket. Press the locking tab on the bottom of the machine control electronics and slide the assembly to the front, then lift. Console Electronics and Housing Assembly The console panel must be removed to access the console electronics and housing assembly. 1. Perform steps 1 and 2 under Accessing & Removing the Electronic Assemblies, page 9, and disconnect the P2 and P5 harnesses from the machine control. Figure 18. Remove the console panel to access the console electronics and housing assembly. 3. Gently remove the decorative trim that surrounds the door and upper console by unsnapping it from the machine. See figure 19. 2. Remove the screw that fastens the assembly to the machine control mounting bracket (figure 16, page 9), and the two screws that fasten the console assembly to the machine (figure 18). Figure 20. Locate 8 plastic latches. Figure 19. Remove the decorative trim. 4. Slide the console up and off of the machine. See figure 18. FOR SERVICE TECHNICIAN’S USE ONLY PART NO. W10177459A TECH SHEET - DO NOT DISCARD PAGE 11 REMOVING THE BACK PANEL 1. Unplug dryer or disconnect power. 2. Remove the two rear screws from the top panel, and slide the top panel to the rear to remove. 3. Remove the cover plate, disconnect the power cord, and remove ground screw. 4. Remove the metal spring clip between the back panel and the exhaust outlet. See figure 21. Contacts Function 1M 2M 3M 5M 6M Start Run = Contacts closed Centrifugal Switch (Motor) Black-White Lt. Blue Green-Yellow Red Red Figure 21. Remove 12 screws. 5. Remove the ten screws on the rear, and two screws on the top of the back panel. Pull the back panel off the machine. See figure 21. Pluggable Drive Motor Switch ELECTRIC DRYER: In addition to the above, remove the terminal block from the back panel. Black White Blue WHITE White Blue Gas Valve, Gas Dryer SOFTWARE COPYRIGHTED. MANUFACTURED UNDER ONE OR MORE OF THE FOLLOWING U.S. PATENTS: 4669200 4700495 4754556 4840285 4865366 4899464 4908959 FOR SERVICE TECHNICIAN’S USE ONLY 4989347 5066050 5560120 5809828 6020698 6047486 6199300 6446357 6597144 6604298 6685241 6732447 6784673 6819255 D314261 D314262 D457991 D457992 D495453 PART NO. W10177459A TECH SHEET - DO NOT DISCARD PAGE 12 ELECTRIC DRYER WIRING DIAGRAM IMPORTANT: Electrostatic (static electricity) discharge may cause damage to machine control electronics. See page 1 for details. R – LINE L2 L1 LINE – BK 240 VOLTS W – NEUTRAL N 120 VOLTS NEUTRAL TERMINAL LINKED TO CABINET W BK FILTER MOV W BR BK P8-1 DRUM LAMP BK P9-2 NEUTRAL LAMP LOAD DOOR L1 GND P003-1 N.C. P003-2 +5 V CONSOLE ELECTRONICS P003-3 P5-1 P5-2 P5-3 P5-4 P5-5 P5-6 P5-7 P5-8 VDD DATA IN VSS STROBE DATA OUT CLOCK BUZZER 12 VDC MOTOR P8-4 T G-Y P9-1 LBU P8-5 BK-W MTR CS MOIST. BU-W SERIAL COM N.O. (0.25 TERMINAL) COM (0.25 TERMINAL) MOIST RTN 5M THERMAL FUSE 196°F (91°C) 4M Y-R BELT SWITCH MACHINE CONTROL ELECTRONICS SENSOR P13-2 2M CENTRIFUGAL SWITCH MAIN 3.3–3.6 START 2.7–3.0 G-Y 6M 3M 1M DRIVE MOTOR 1/3 H.P. G-Y P4-4 MODEL RTN P4-5 OUTLET TEMP. RTN HEATER RTN W DOOR SWITCH NO LBU P13-1 Y-R MODEL OUTLET TEMP. HEATER +V BU LBU SENSOR MOVS P2-1 VDD P2-2 DATA P2-3 VSS HEATER RELAY 1 R W P8-2 Gnd P005-3 VDD P005-2 DATA P005-1 VSS BK W P8-3 R NC INLET TEMP. INLET TEMP. RTN Y-R BK P4-3 R P4-6 R P4-2 R P4-1 R OUTLET THERMISTOR 10 k INLET THERMISTOR 50 k NC R HEATER R-W R-W HIGH LIMIT THERMOSTAT 295°F (146°C) THERMAL CUT-OFF 352°F (178°C) R 7.8–11.8 5400 W COMBINED PART GAS DRYER WIRING DIAGRAM L1 LINE – BK W – NEUTRAL N BK 120 VOLTS BK W FILTER MOV BR BK P8-1 DRUM LAMP BK P9-2 NEUTRAL LAMP LOAD DOOR L1 GND P003-1 N.C. P003-2 +5 V P003-3 P5-1 P5-2 P5-3 P5-4 P5-5 P5-6 P5-7 P5-8 VDD DATA IN VSS STROBE DATA OUT CLOCK BUZZER 12 VDC MOTOR MTR CS MOIST. P2-1 VDD P2-2 DATA P2-3 VSS HEATER RELAY 1 N.O. (0.25 TERMINAL) R COM (0.25 TERMINAL) T P8-2 G-Y MODEL RTN TEMP. TEMP RTN MACHINE CONTROL ELECTRONICS G-Y P14-4 P14-5 BK P14-3 R-W P14-6 R-W N.C. P14-1 R 5M 4M BELT SWITCH 2M CENTRIFUGAL SWITCH MAIN 3.3–3.6 G-Y START 2.7–3.0 6M 3M BK 1M DRIVE MOTOR 1/3 H.P. OUTLET THERMISTOR R 10 k IGR IG 1V IGNITOR 50–500 VALVE MOV 3 1 2 HOLD BU NC BK R HIGH LIMIT THERMOSTAT 245°F (118°C) 02/08 Y-R P13-2 P14-2 DOOR SWITCH LBU BK-W P8-5 P13-1 Y-R N.C. BU NO Y-R HEATER +V HEATER RTN W LBU LBU P9-1 SERIAL COM MODEL BK P8-4 W NC SENSOR MOIST RTN P005-3 VDD W SENSOR MOVS Gnd P005-2 DATA CONSOLE P005-1 VSS ELECTRONICS P8-3 R-W THERMAL CUT-OFF 352°F (178°C) TF1 5 4 MAIN TF2 THERMAL FUSE 196°F (91°C) FOR SERVICE TECHNICIAN’S USE ONLY ASSIST FS1 VALVE NO. 1 VALVE NO. 2 FS2 FLAME SENSOR PART NO. W10177459A
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