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GE DPGT750EC/GC Technical Service Manual

Profile gas and electric dryers
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GE Consumer Products
TECHNICAL SERVICE GUIDE
Profile Gas and
Electric Dryers
MODEL SERIES:
DPGT750EC/GC
PUB # 31-9104 07/03

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Table of Contents
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  Summary of Contents for GE DPGT750EC/GC

  • Page 1 GE Consumer Products TECHNICAL SERVICE GUIDE Profile Gas and Electric Dryers MODEL SERIES: DPGT750EC/GC PUB # 31-9104 07/03...
  • Page 2 If grounding wires, screws, straps, clips, nuts, or washers used to complete a path to ground are removed for service, they must be returned to their original position and properly fastened. GE Consumer Products Technical Service Guide Copyright © 2003 All rights reserved.
  • Page 3: Table Of Contents

    Table of Contents Airflow Diagram (Gas and Electric Models) ... 15 Backsplash ...20 Belt Switch ... 26 Blower Motor ... 27 Component Locator Views ... 16 Consumer Help Screens ... 13 Control Features ... 7 Control Quick Reference Chart ... 38 Control System ...20 Door Switch ...25 Drive Belt ...
  • Page 4: Nomenclature

    D P G T 7 5 0 E C 0 W W GE Dryer Feature Pack Common Brand Features Exceptions: H = Energy Star P = Profile™ K, N = Special S = Spacemaker® Capacity/Configuration L = Large S = Super...
  • Page 5: Warranty

    Any part of the dryer which fails due to a defect in materials or workmanship. During this From the date of the full one-year warranty, GE will also provide, free of charge, all labor and related service costs to original purchase replace the defective part.
  • Page 6 Overview General The GE Profile Harmony Dryer is part of the GE Profile Harmony Clothes Care System utilizing the latest developments in dryer technology. Most conventional drying systems have a single motor that powers both the blower and the drum. Therefore, the blower fan and dryer drum are powered at the same rate of speed.
  • Page 7: Control Features

    Dryer Control Panel Throughout this manual, features and appearance may vary from your model. Features of 1 POWER. Press to “wake up” the display. If the display is active, press to put the dryer the dryer into standby mode. You may also press the control Touch Screen or any button to “wake up”...
  • Page 8: Quick Start

    Quick Start Getting Clean the lint filter. Started IMPORTANT: Clean the lint filter each time you use the dryer. If the Touch Add clothes. Do not overload. This wastes Screen is energy and promotes wrinkling. dark, press Select one of the four drying methods from the POWER or Home Screen: the Touch...
  • Page 9: Dry Cycles

    Dry Cycles If the Touch Screen is dark, press POWER or the Touch Screen to access the dry cycles menu. The default cycle settings are based on standard load types. Always follow the fabric manufacturer’s care label when laundering. Drying by Select By FABRIC to dry loads sorted by fabric type.
  • Page 10: Summary Screen

    Summary Screen About the After selecting a dry cycle, the Summary Screen displays the automatic settings for the cycle you Summary have chosen. You can adjust these by touching Screen the screen location for any of the settings shown. If you change any of the automatic settings, you can save the new settings as a custom “My Cycle”...
  • Page 11 Summary Screen About Touch the OPTIONS pad on the Touch Screen to select drying options. After selecting any drying the Drying options, press OK to save your setting. Options Delay Start Touch the DELAY START pad repeatedly to set a delay time of up to 12 hours.
  • Page 12: My Cycles

    My Cycles About the “My The “My Cycles” feature allows you to create, store and reuse up to 6 custom cycles. Create Cycles” Feature your own cycles from scratch or adjust the settings of a predefined dry cycle; then save for one-touch recall.
  • Page 13: Consumer Help Screens

    My Cycles To rename a “My Cycle” from the Home Screen: 1 Press the MY CYCLES button. 2 Select RENAME from the Touch Screen menu. 3 Select the cycle name from the Touch Screen menu. 4 Using the keypad on the Touch Screen, type the name of your “My Cycle”...
  • Page 14: Sales Demo Mode

    Consumer Help Screens Setting the The machine settings on the Help feature allow you to control the volume of the button Machine beep and end-of-cycle signal, and turn the Preferences washer/dryer communication feature on or off. Press the HELP button, then select from the on-screen options.
  • Page 15: Airflow Diagram (Gas And Electric Models)

    Airflow Diagram (Gas and Electric Models) LINT FILTER Dryer Temperature Settings DRYER TEMPERATURE APPROXIMATE CURRENT SETTING DRAW (L1) EXTRA LOW 10.5 AMPS 16 AMPS MEDIUM 19 AMPS HIGH 24 AMPS Note: Above measurements are at 70°F ambient temperature with no clothes load and vent disconnected.
  • Page 16: Blower Motor

    Component Locator Views Electric Model Inlet Thermistor Inlet Hi-Limit Thermostat Inlet Safety Thermostat Drive Motor Heater Housing Idler Pulley Blower Motor Outlet Thermistor & Thermostat TRIAC Board – 16 –...
  • Page 17 Gas Model Inlet Thermistor Combustion Chamber Drive Motor Inlet Hi-Limit Thermostat Idler Pulley Blower Motor Outlet Thermistor & Thermostat Gas Valve Flame Sensor (Detector) Ignitor Inlet Safety Thermostat – 17 –...
  • Page 18: Inverter And Main Board Pin Connectors

    Inverter and Main Board Pin Connectors Inverter Board (Electric Model) Triac 120 VAC Input From RF Choke CN10 Safety Thermostat Ground Door Switch Fuse 1-Moisture Sensor 3-Inlet/Outlet Thermistor 2-Inlet Thermistor 4-Ground Inverter Board (Gas Model) Gas Valve ON/OFF 120 VAC Input From RF Choke CN10 Safety Thermostat Ground Door Switch...
  • Page 19 Main Board Touch Screen LCD Display WARNING: THE CONNECTOR AT THE LCD BACKLIGHT IS OVER 800 VDC. USE APPROPRIATE TYPE VOLTMETER OR DAMAGE COULD RESULT. Note: The gas dryer main board differs from the electric dryer main board by the addition of a jumper plug on the model selector connector (the electric model has no jumper plug).
  • Page 20: Backsplash

    Backsplash The backsplash must be removed to access the control system components. To remove the backsplash: 1. Remove the 4 Phillips head screws that hold the backsplash in place. Backsplash 2. Place a towel over the lid of the dryer to prevent scratches to the surface.
  • Page 21: Inverter

    Membrane Keypanel The membrane keypanel is attached to the backsplash and is available only as a complete assembly. • When ordering a replacement backsplash, the part must be ordered as left or right, depending upon installation. • The membrane keypanel is connected to the control board by a ribbon cable.
  • Page 22: Signal (Beeper)

    Testing the Inverter CN14 120 VAC Input From RF Choke CN10 Fuse • The inverter receives 120 VAC at the red 3-pin connector CN10. The voltage first passes through an RF choke. The RF choke filters the line voltage and is replaced as an assembly. If 120 VAC is not present, check the wall outlet, power cord, and RF choke.
  • Page 23: Top Cover

    Top Cover The top cover is held in place by 2 Phillips head screws, located on the back of the washer, and two front tabs. To remove the top cover: 1. Remove the Backsplash 2. Remove the 2 screws that hold the box in place.
  • Page 24 Drum WARNING: Sharp edges may be exposed. Wear Kevlar gloves or equivalent protection. The dryer drum is made of 304 stainless steel and has three replaceable drum baffles attached to the inside. The drum rotates clockwise at 47 to 50 rpm. To remove the drum: 1.
  • Page 25: Door Switch

    Drum Rollers The 304 stainless steel drum rotates on four drum rollers. Two on the front drum support and two on the rear drum support. The drum roller comes as a complete assembly. To remove the drum rollers: 1. Remove the Top Cover Front Panel 2.
  • Page 26: Belt Switch

    Drum Light The drum light has a screw-in 15-watt, 120-VAC bulb located in the top of the front panel. It is switched on the neutral side by the door switch. • Replace only with a bulb of the same size and type.
  • Page 27: Drive Motor

    Drive Motor The drive-motor is a single-speed AC, motor with an automatic reset overload protector. • The overload protector is an internal component of the motor and cannot be replaced separately. • The motor contains a centrifugal switch that serves three purposes: 1.
  • Page 28 5. Remove the 2 Phillips head screws that hold the blower guard in place. Remove the blower guard. 6. Remove the 13 mm center nut. (Turn clockwise to remove.) Remove the blower wheel. 7. Remove the 3 Phillips head screws from the center of the blower housing.
  • Page 29: Heater Assembly (Electric Models)

    Heater Assembly ( Electric Models The electric dryer has two heating elements. One is fixed at 3000 watts and cycles on and off. The other is variable, controlled by a Triac that varies the wattage from 0 to 3000 watts. •...
  • Page 30: Inlet Thermistor

    Inlet Thermistor The inlet thermistor is located on the inside of the inlet air duct on both electric and gas models. Inlet Thermistor • The inlet thermistor measures the incoming air temperature and responds to temperature changes. • The inlet thermistor provides temperature change information to the electronic control board.
  • Page 31: Outlet Thermistor

    • The inlet safety thermostat monitors incoming air temperature. • If the thermostat reaches a temperature beyond its maximum temperature rating, it will trip and disable all dryer functions except the drum lamp. • The inlet safety thermostat must be reset manually by pressing the reset button on the back of the thermostat (see photos).
  • Page 32: Hi-Limit Thermostat

    Hi-Limit Thermostat The hi-limit thermostat is located on the left side of the heater housing on electric models. It is located on the right, upper side of the combustion chamber on gas models. Electric Model Location Gas Model Location • The hi-limit thermostat monitors incoming air temperature.
  • Page 33: Ignitor

    • The control operates the gas valves by supplying voltage based on varying duty cycles. • It is difficult to determine specific voltages at the valve due to software algorithms based on clothes load and temperature settings. The most accurate diagnostic check is to measure resistance of the solenoid coils.
  • Page 34: Ignitor And Flame Detector

    Ignitor and Flame Detector • When the electronic control calls for heat, 120 VAC is supplied to the ignitor. • The flame detector, which is in series with the ignitor, is closed. • When the ignitor reaches a high enough temperature, the flame detector opens.
  • Page 35: Overview

    Overview The dryer control has a field service mode that can be accessed by the service technician in order to give critical information on the status of various components of the dryer. This mode will aid the service technician in quickly identifying failed or improper operation of components and systems.
  • Page 36 Follow the on- screen instructions. CONGRATULATIONS ON THE PURCHASE OF YOUR NEW GE PROFILE DRYER! A BRIEF SELF DIAGNOSTIC WILL NOW BE RUN ON YOUR DRYER. THIS MAY TAKE UP...
  • Page 37 2. Press the HELP pad. The main help screen is displayed. MACHINE HOME SCREEN PREFERENCES HELP TROUBLESHOOTER 3. Press and hold the HELP and START/STOP pads simultaneously for 3 seconds. One of the following screens will be displayed. CONTRAST ELECTRIC LQC TEST DOOR : CLOSE BLOWER :...
  • Page 38: Control Quick Reference Chart

    Control Quick Reference Chart No Power Demo Mode Home & My Cycles Buttons (3 secs) Home, Back, My Cycles, or Help Buttons Help Button (other than Home Screen) Help Mode Home Screen Help Button Start/Stop & My Cycles Buttons (3 secs) Test Mode Power...
  • Page 39: Troubleshooting

    Problem LCD backlight does not come on. Vertical lines on the LCD display when the dryer is turned on. TOUCH TO SELECT S e n s o r DRY CYCLE FABRIC GARMENT SPECIAL TIMED DRY CYCLES LCD screen too dark or too light as compared to LCD washer screen.
  • Page 40: Troubleshooting Charts

    Troubleshooting Charts PROBLEM POTENTIAL CAUSE Long Dry Time Dryer Heating Restricted ducting Lint filter/trap not cleaned Washer not spinning out normally Washer additional capacity/overloading Dryer operating at half-heat Long Dry Time Dryer Not Heater error (electric) Heating House wiring problem Fixed Wattage Heater system failure (electric) Variable wattage Heater system...
  • Page 41 PROBLEM POTENTIAL CAUSE Long Dry Time Dryer Not Heater error (Gas) Heating continued Low line voltage No gas supply Ignitor failure Flame detector failure. ON/OFF gas valve failure Linear Gas Valve Failure Thermostat failed open Centrifugal switch failure Thermistor failure Won’t Start - controls dead Low L1 voltage...
  • Page 42 PROBLEM POTENTIAL CAUSE Dryer stopped prematurely Clogged/restricted ducting. (clothes wet) Blower motor less than 1000 rpm Unlevel Power outage Moisture sensor unplugged/defective Noise Worn rollers Worn drum felt Blower unbalance. Drum out of round Drum felt glue on roller path Loose parts.
  • Page 43: Error Charts

    Error Charts – 43 –...
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  • Page 46: Schematics

    Schematics Electric Model WARNING: Disconnect electrical power before servicing. Caution: Label all wires prior to disconnection. Wiring errors can cause improper and dangerous operation. Verify operation after servicing. – 46 –...
  • Page 47 Gas Model WARNING: Disconnect electrical power before servicing. Caution: Label all wires prior to disconnection. Wiring errors can cause improper and dangerous operation. Verify operation after servicing. – 47 –...
  • Page 48: Parts

    PARTS Electric Model – 48 –...
  • Page 49 Electric Model – 49 –...
  • Page 50 Electric Model – 50 –...
  • Page 51 Electric Model VIEW CATALOG NUMBER NUMBER 49-90152 31-15541 WH46X10098 WE19X10072 WE04X10105 WE01X10176 WE20X10077 WE04X10120 WE14X10051 WE08X10057 WE08X10058 WE04X10127 WE20X10079 WE01X10209 WE14X10052 WE01X10178 WE04X10121 WE04X10122 WE08X10063 WE08X10060 WE08X10061 WE01X10179 WE01X10180 WE01X10181 WE14X10053 WE01X10210 WE01X10183 WE02X10059 WE20X10080 WE04X10110 WE01X10184 WE01X10185 WE02X10060 WE10X10018 WE01X10186 WE01X10187 WE01X10188...
  • Page 52 Electric Model VIEW CATALOG NUMBER NUMBER WE21X10015 WE09X10015 WE14X10056 WE12X10011 WE14X10057 WE01X10191 WE04X10112 WE01X10192 WE01X10193 WE08X10062 WE14X10058 WE18X10008 WE18X10009 WE01X10194 WE14X10059 WE17X10007 WE13X10023 WE13X10024 WE04X10113 WE02X10061 WE12X10012 WE01X10195 WE02X10062 WE01X10196 WE01X10197 WE17X10008 WE13X10025 WE04X10114 WE04X10123 WE14X10065 WE16X10002 WE02X10063 WE02X10064 WE02X10065 WE14X10061 WE14X10062 WE01X10198...
  • Page 53 Gas Model – 53 –...
  • Page 54 Gas Model – 54 –...
  • Page 55 Gas Model – 55 –...
  • Page 56 Gas Model VIEW CATALOG NUMBER NUMBER 49-90152 31-15541 WH46X10098 WE19X10072 WE04X10105 WE04X10106 WE20X10078 WE04X10107 WE14X10051 WE08X10057 WE08X10058 WE04X10127 WE20X10079 WE01X10209 WE14X10052 WE01X10178 WE08X10064 WE08X10063 WE08X10060 WE08X10061 WE01X10179 WE01X10180 WE01X10181 WE14X10053 WE01X10210 WE01X10183 WE02X10059 WE20X10080 WE04X10110 WE01X10184 WE01X10185 WE02X10060 WE10X10018 WE01X10186 WE01X10187 WE01X10188 WE01X10189...
  • Page 57 Gas Model VIEW CATALOG NUMBER NUMBER WE01X10191 WE04X10112 WE01X10192 WE01X10193 WE08X10062 WE14X10058 WE18X10008 WE18X10009 WE01X10194 WE14X10059 WE17X10007 WE13X10023 WE13X10024 WE04X10113 WE02X10061 WE12X10012 WE01X10195 WE02X10062 WE01X10196 WE01X10197 WE17X10008 WE13X10025 WE04X10114 WE04X10115 WE14X10060 WE16X10002 WE02X10063 WE02X10064 WE02X10065 WE14X10061 WE14X10062 WE01X10198 WE11X10014 WE11X10015 WE01X10199 WE04X10116 WE01X10200...
  • Page 58: Reversing The Door Swing

    Reversing the Door Swing Overview When viewed from the front, the dryer is shipped so the door opens from the left . Due to utility configurations or customer preferences, the door can be set up to open from the right by reversing the door swing.
  • Page 59 9. Install the handle on the opposite side of the door. Rear of Door 10. Remove the hinges from the door and install them on the opposite side with the hinge pin toward the outside of the door. Opposite Side of Door 11.
  • Page 60: Switching The Washer And Dryer Backsplashes

    Switching the Washer and Dryer Backsplashes Overview When viewed from the front, the washer is shipped for installation on the left and the dryer is shipped for installation on the right. If the hose utility connections are arranged so that the units must be installed with the washer on the right and the dryer on the left, the backsplashes of the washer and dryer can be switched in order to...
  • Page 61 5. Disconnect the ribbon at the right of the washer control board by pulling the connector at the end of the ribbon off the metal pins. Note: Do not disconnect any other wires from the washer control board. Rear of Washer 6.
  • Page 62 12. Place the backsplash from the dryer on top of the washer and place the backsplash from the washer on top of the dryer. 13. Attach the dryer control board to the new backsplash by replacing the four screws removed from the dryer control board earlier. Screws 14.
  • Page 63 18. Attach the washer control board to the new backsplash by replacing the four screws removed from the washer control board earlier. 19. Connect the washer control board to the new backsplash by sliding the ribbon connector on the new backsplash onto the metal pins on the control board and pushing in.

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