Maytag Commercial Laundry MDG-35 Service Manual
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Maytag Commercial Laundry MDG-35 Service Manual

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M DG-3 5
Se r vic e M a nua l
Whirlpool Corporation
Commercial Laundry
Benton Harbor, MI 49022
1-800-662-3587
Part No. 450365- 1

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  • Page 1 https://appliancetechmanuals.com M DG-3 5 Se r vic e M a nua l Whirlpool Corporation Commercial Laundry Benton Harbor, MI 49022 1-800-662-3587 Part No. 450365- 1...
  • Page 2 https://appliancetechmanuals.com Re t a in T his M a nua l in a Sa fe Pla c e for Fut ure Refe re nc e This product embodies advanced concepts in engineering, design, and safety. If this product is properly maintained, it will provide many years of safe, efficient, and trouble free operation.

  • Page 3: Table Of Contents

    https://appliancetechmanuals.com Ta ble of Cont e nt s _______________ I M PORTAN T You must disconnect and lockout the electric Important Information ........4 supply and the gas supply or the steam supply A. Safety Precautions ..........4 before any covers or guards are removed from Routine Maintenance ........

  • Page 4: Important Information

    https://appliancetechmanuals.com SECTION I IMPORTANT INFORMATION A. SAFETY PRECAUTIONS WARNING: For your safety, the information in this manual must be followed to minimize the risk of fire or explosion or to prevent property damage, personal injury, or loss of life. The dryer must never be operated with any of the back guards, outer tops, or service panels removed.
  • Page 5 https://appliancetechmanuals.com NOTE: Failure to do so will void the warranty. 9. Under no circumstances should the dryer door switches, lint door switch, heat safety circuit ever be disabled. WARNING: PERSONAL INJURY OR FIRE COULD RESULT. 10. This dryer is not to be used in the presence of dry cleaning solvents or fumes. 11.

  • Page 6: Routine Maintenance

    https://appliancetechmanuals.com SECTION II ROUTINE MAINTENANCE A. CLEANING A program or schedule should be established for periodic inspection, cleaning, and removal of lint from various areas of the dryer, as well as throughout the ductwork system. The frequency of cleaning can best be determined from experience at each location.

  • Page 7: Adjustments

    https://appliancetechmanuals.com 6 MONTHS Inspect and remove lint accumulation in customer furnished exhaust ductwork system and from dryer’s internal exhaust ducting. NOTE: THE ACCUMULATION OF LINT IN THE EXHAUST DUCTWORK CAN CREATE A POTENTIAL FIRE HAZARD. DO NOT OBSTRUCT THE FLOW OF COMBUSTION AND VENTILATION AIR. CHECK CUSTOMER FURNISHED BACK DRAFT DAMPERS IN THE EXHAUST DUCTWORK.

  • Page 8: Installation Requirements

    https://appliancetechmanuals.com SECTION III INSTALLATION REQUIREMENTS Installation should be performed by competent technicians in accordance with local and state codes. In the absence of these codes, the installation must conform to applicable American National Standards: ANSI Z223.1-LATEST EDITION (National Fuel Gas Code) or ANSI/NFPA NO. 70-LATEST EDITION (National Electrical Code) or in Canada, the installation must conform to applicable Canadian Standards: CAN/CGA-B149.1-M91 (Natural Gas) or CAN/CGA- B149.2-M91 (L.P.

  • Page 9: Operational Service Check Procedure

    https://appliancetechmanuals.com The gas dryer installation must meet the American National Standard...National Fuel Gas Code ANSI Z223.1-LATEST EDITION, or in Canada, the Canadian Installation Codes CAN/CGA-B149.1 M91 (Natural Gas) or CAN/CGA-B149.2- M91 (L.P. Gas) or LATEST EDITION, as well as local codes and ordinances and must be done by a qualified professional.

  • Page 10: Description Of Parts

    https://appliancetechmanuals.com SECTION IV DESCRIPTION OF PARTS A. CONTROL PANEL (MICROPROCESSOR) Lifting the control door will reveal the control panel assembly. Opening the control panel will allow access to the major components which include the computer board and keypad. The keypad inputs to the computer what temperature and program has been selected.

  • Page 11: Drive Motor

    https://appliancetechmanuals.com D. DRIVE MOTOR The T.E.F.C. drive motor is located in the left side of the machine (viewing from the front) of the dryer. It sits on an adjustable base so that the motor can be easily adjusted for belt tension adjustment. The drive motor is a 1/4 HP motor and operates on 115 to 230 volts, 50/60 Hz.

  • Page 12: Main Door Switch

    https://appliancetechmanuals.com G. MAIN DOOR SWITCH The main door switch is located in the main control panel. When the main door opens, the switch will also open, preventing the dryer from operating. The main door switch is a safety device and should never be disabled. H.

  • Page 13: Lint Drawer Switch

    https://appliancetechmanuals.com L. LINT DRAWER SWITCH The lint drawer switch is located in the rear of the lint compartment and attached to the back of the lint drawer compartment. The lint drawer switch insures that the dryer will operate only when the lint drawer is completely closed.

  • Page 14: Servicing

    https://appliancetechmanuals.com SECTION V SERVICING INTRODUCTION All electrical/mechanical service or repairs should be made with the electrical power to the dryer disconnected (power off). WARNING: PERSONAL INJURY COULD RESULT. The information provided in this section should not be misconstrued as a device for use by an untrained person making repairs.
  • Page 15 https://appliancetechmanuals.com To Replace Keypad Label Assembly 1. Discontinue electrical power to the dryer. 2. Repeat step 1-5 for computer board removal. 3. Slowly peel off and remove keypad label assembly from control panel. 4. Peel paper backing off new keypad label assembly. 5.

  • Page 16: Glo-Bar Controls

    https://appliancetechmanuals.com B. GLO-BAR CONTROLS To Remove Globar (refer to the burner illustration) 1. Discontinue electrical power to the dryer. 2. Disconnect Glo-Bar connector. 3. Disassemble ignitor from burner by removing the single ignitor mounting screw. 4. Reverse procedure for installing new Glo-Bar ignitor. To Replace Gas Valve 1.
  • Page 17 https://appliancetechmanuals.com To Replace Main Burner Orifices 1. Refer to “To Replace Gas Valve” and follow steps 1 through 6. 2. Unscrew main burner orifices and replace. NOTE: Use extreme care when removing and replacing orifices. These orifices are made of brass and are easily damaged.
  • Page 18 https://appliancetechmanuals.com To Convert from Natural Gas to L.P. Gas NOTE: All dryers are sold as natural gas, unless otherwise specified at the time the dryer order was placed. For L.P. gas the dryer must be converted as follows. 1. Refer to “Replace Gas Valve” and follow steps 1 through 6. 2.

  • Page 19: Thermostats

    https://appliancetechmanuals.com C. THERMOSTATS To Replace Burner Hi-Limit Thermostat (Gas Models Only) This thermostat is an important safety device serving as an added protection against failure of the airflow (sail switch) to open in the event of motor failure or reduced airflow condition. IMPORTANT: Under no circumstances should heat circuit safety devices ever be disabled.

  • Page 20: Front Panel And Main Door Assemblies

    https://appliancetechmanuals.com E. FRONT PANEL AND MAIN DOOR ASSEMBLIES To Replace Main Door Switch 1. Discontinue electrical power to the dryer. 2. Open main door. 3. Remove the four Phillips head screws holding the main control panel. 4. Disconnect wiring from switch to computer board. 5.
  • Page 21 https://appliancetechmanuals.com To Replace Front Panel 1. Discontinue electrical power to the dryer. 2. Follow procedure for removal of front panel and bottom toe panel. 3. Follow procedure for removal of main door assembly. 4. Open control (service) door and follow procedure for removal of computer panel. 5.
  • Page 22 https://appliancetechmanuals.com To Replace Tumbler or Tumbler Support 1. Discontinue electrical power to the dryer. 2. Follow procedure for removal of main door assembly. 3. Follow procedure for removal of front panel assembly. 4. Remove tumbler belt from motor. 5. Follow procedure for front panel removal. 6.
  • Page 23 https://appliancetechmanuals.com To Replace Drive Belt 1. Follow procedure to remove main door assembly. 2. Follow procedure to remove computer panel and lower toe panel. 3. Loosen tension belt so that it can be easily rolled off motor pulley. 4. Remove belt. 5.
  • Page 24 https://appliancetechmanuals.com Remove Blower Housing / Replace Blower Motor 1. Discontinue electrical power to the dryer. 2. Disconnect the harness from motor, the hi-limit, exhaust probe and lint switch. 3. Remove the lint screen. 4. Remove the bottom toe panel. 5. Carefully remove the four Acorn nuts that hold the blower housing to the lint housing. 6.

  • Page 25: To Replace Lint Drawer Switch

    https://appliancetechmanuals.com F. TO REPLACE LINT DRAWER SWITCH 1. Discontinue electrical power to the dryer. 2. Remove lint drawer and bottom toe panel. 3. Remove the two nuts holding the lint bracket on. 4. Remove lint switch cover and disconnect the two terminals of the switch. 5.
  • Page 26 https://appliancetechmanuals.com EVENT I.D. FAILURE DESCRIPTION Top Radiant Sensor fault count Top Burner Ignitor fault count Top Exhaust High Limit Bottom Radiant sensor fault count Bottom Burner ignitor fault count Bot Exhaust High Limit Coin 1 Bad Coin count Coin 2 Bad Coin Count Upper pocket forward rotation sensor fault count Upper pocket reverse rotation sensor fault count Lower pocket forward rotation sensor fault count...
  • Page 27 https://appliancetechmanuals.com NOTE: Once a cycle is selected, the control will clear the fault condition so that dryer can be started. This will also clear all credit in escrow and any cycle time remaining on both pockets. When the dryer is still in an idle state, a cycle must be selected. Once a cycle is selected, the unit will enter into Running Mode.
  • Page 28 https://appliancetechmanuals.com 3: HELP MENU The help menu allows the user to view the status of different parts of the dryer. When a feature is highlighted, the center section will list that feature and its current status. The items in the help menu will refer to the current running cycle that was selected in Diagnostic Mode.
  • Page 29 https://appliancetechmanuals.com If the help menu feature “CODE” is selected, the center section will present “Help Codes” and “Events”. All of the items in the code menu will automatically scroll up and continue to scroll until LOW/DOWN ARROW key is pressed to select a new help menu feature.

  • Page 30: Faults

    https://appliancetechmanuals.com FAULTS EXHAUST PROBE D19 An exhaust probe fault occurs when the control detects that the exhaust temperature transducer is reading a temperature that is out of the probe’s normal operating temperature range for more than 3-seconds. There is an automatic fault clearing feature for this fault.

  • Page 31: Events

    https://appliancetechmanuals.com FORWARD ROTATION SENSOR FAULT D14 A forward rotation fault pertains only to reversing machines. The way this fault works is if the dryer is reversing and is running a cycle that has the reversing option enabled, if a rotation sensor fault condition is detected, the drive output would be shut off.

  • Page 32: Technical Information

    https://appliancetechmanuals.com SECTION VI TECHNICAL INFORMATION A. DATA LABEL When contacting Maytag, certain information is required to ensure proper service/parts information. This information is on the data label, located on the top left hand corner of the dryer, viewed from the rear (refer to the illustration above).

  • Page 33: Using A Manometer

    https://appliancetechmanuals.com B. USING A MANOMETER How To Use A Manometer 1. With dryer in nonoperating mode, remove plug on the gas valve pressure tap. 2. Attach plastic tubing to pressure tap. Fitting is supplied with manometer (refer to the illustration). 3.
  • Page 34 https://appliancetechmanuals.com Part No. 450365 1 - 12/24/13...

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