Maytag Commercial Laundry MDE22PD Service Manual
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Maytag Commercial Laundry MDE22PD Service Manual

High efficiency single load gas and electric dryers
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W10251138B
SErvicE ManuaL
Maytag Commercial
High Efficiency Single Load
Gas and Electric Dryers
MODELS: MDE22PD, MDG22PD, MDE22PR, MDG22PR
MDE25PD, MDG25PD, MDE25PR, MDG25PR
TEcHnicaL EDucaTiOn

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  • Page 1 W10251138B SErvicE ManuaL Maytag Commercial High Efficiency Single Load Gas and Electric Dryers MODELS: MDE22PD, MDG22PD, MDE22PR, MDG22PR MDE25PD, MDG25PD, MDE25PR, MDG25PR TEcHnicaL EDucaTiOn...
  • Page 2 FOrWarD This Maytag Service Manual, ”High Efficiency Single Load Gas and Electric Dryers” (Part No. W10251138B), provides the Commercial Laundry Service Professional with information on the installation, operation, and service of the High Efficiency series 22 dryers. For specific information on the model being serviced, refer to the “Installation Instructions,”...

  • Page 3: Table Of Contents

    Model & serial number label and tech sheet location ............1-3 Warranty ........................... 1-4 General user information ....................1-5 End of set-up procedures ....................1-11 Maytag commercial laundry literature list High Efficiency product ........1-12 inSTaLLaTiOn inFOrMaTiOn ....................2-1 Tools and parts ......................... 2-1 Location requirements ...................... 2-2 Venting requirements ......................
  • Page 4 Page Remove service panel ...................... 4-16 Remove front panel ......................4-17 Remove lint filter housing ....................4-18 Remove front bulkhead ..................... 4-18 Remove outlet grill ......................4-19 Remove drum support rollers and shafts ................4-20 Remove a baffle ........................ 4-21 Remove dryer drum ......................
  • Page 5 Page cOMPOnEnT TESTinG ......................5-1 Gas valve coils ........................5-1 Burner ignitor ........................5-2 Manometers ........................5-2 Flame sensor ........................5-4 High temp thermostat & High temp cutout (gas dryers only) ..........5-4 Heating element (electric dryers only) ................5-5 High temp cutout .......................

  • Page 6: View Entire Service Video

    inTEracTivE SErvicE ManuaL inSTrucTiOnS Click the mouse on any topic in the table of contents to go directly to that section. Click the mouse on any link that says (See page ?-?) to go directly to the page referenced. Click the mouse on any button in the links section to open the attached document. This symbol means a video clip is available.

  • Page 7: General

    GEnEraL DrYEr SaFETY iMPOrTanT Electrostatic Discharge (ESD) Sensitive Electronics ESD problems are present everywhere. ESD may damage or weaken the electronic control assembly. 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.

  • Page 8: Model Number Designations

    MODEL nuMBEr DESiGnaTiOnS MODEL NUMBER BRAND Maytag PRODUCT GROUP DE Dryer - Electric DG Dryer - Gas LE Laundry Stack - Electric LG Laundry Stack - Gas DESCRIPTION HE Matching Dryer for HE Washer Model 22 HE Matching Dryer for HE Washer Model 30 CONTROL TYPE CS Mechanical - coin slide ready MN Mechanical - non-coin...

  • Page 9: Model & Serial Number Label And Tech Sheet Location

    MODEL & SEriaL nuMBEr LaBEL anD TEcH SHEET LOcaTiOn Location of Model & Serial Number Label Location of Tech Sheet, Parts List & Wiring Diagram Inside The Service Panel...

  • Page 10: Warranty

    WarranTY MAYTAG COMMERCIAL SINGLE-LOAD AND VENDED ® MULTI-LOAD WASHER AND DRYER WARRANTY LIMITED WARRANTY ON PARTS For the first five years from the date of purchase, when this commercial appliance is installed, maintained and operated according to the instructions attached to or furnished with the product, Maytag brand of Whirlpool Corporation (thereafter “Maytag”) will pay for factory specified parts or original equipment manufacturer parts to correct defects in materials or workmanship.

  • Page 11: General User Information

    GEnEraL uSEr inFOrMaTiOn Blank display Pricing This condition indicates the appliance is After the door is opened following the inoperative. Check RFI device and for correct completion of a cycle, the display indicates voltage to UIC from the transformer. the cycle price (unless set for free operation). As coins or debit inputs arrive, the display will “- - - -”...
  • Page 12 Free cycles and Pr Models set-up as Pn. This is established by setting the cycle price to zero. When this happens ‘SELECT CYCLE’ will be displayed rather than the cycle price. Any cycle started as a free cycle will automatically terminate when the door is Electrical Shock Hazard opened.
  • Page 13 DiSPLaY PR Models with Gen. 2 Debit Card Reader: Once a Gen. 2 debit card reader is installed (according to the reader manufacturer After the dryer has been installed and plugged instructions), the set-up can only be in, the display can show ‘0 minutes.’ changed by inserting a manual set-up card (supplied by the reader manufacturer) into all Models...
  • Page 14 SErvicE accESS cODE (“B” Series Pr Models with a key switch on the Models and newer) This code can be console: Insert access key and turn entered to access service mode without counter-clockwise. removing the console. It only functions on dryers set up for 0 vend price without any Special Pricing set-up, and the Coin/Debit iMPOrTanT: The console must not be...
  • Page 15 SET-uP cODES CODE EXPLANATION The PERM. PRESS button will advance REGULAR CYCLE PRICE from code to code. Represents the number of quarters (coin 1) needed to start the dryer; may adjust from 0–39 (See b.xx set-up for VALUE OF COIN 1). The WHITE AND COLORS button will Advance from 0–39 by pressing WHITES AND COLORS.
  • Page 16 CODE EXPLANATION CODE EXPLANATION SPECIAL PRICING OPTIONS VAULT VIEWING OPTION This option is either Selected ‘ON’ or Not Selected ‘OFF’. This option is either Selected ‘ON’ or Not Selected ‘OFF’. Not Selected ‘OFF’. Not Selected ‘OFF’. Selected ‘ON’. Press DELICATES button once for this selection. Selected ‘ON’.

  • Page 17: End Of Set-Up Procedures

    If money counter (1.0C or 1.C0) is selected, CODE EXPLANATION the following is true: COIN/DEBIT OPTION Both coin & debit selected. Press DELICATES button 3 consecutive times to change this selection. 3 00 Dollars in Hundreds 3 01 = $100.00 Coins selected, debit disabled.

  • Page 18: Maytag Commercial Laundry Literature List High Efficiency Product

    MaYTaG cOMMErciaL LaunDrY LiTEraTurE LiST HiGH EFFiciEncY PrODucT PRODUCT TYPE MODEL Install Instruct Tech Sheet Service Parts List MDE22PDAYW0 W10135154 W10239200 W10135169 MDE22PDBZW0 W10277179 W10239202 W10273436 MDE22PRBZW0 W10277179 W10239202 W10273434 MDE22PNAGW0 W10239198 W10239197 W10239193 MDE22PDBYW0 W10277179 W10239202 W10273438 Electric Dryer...

  • Page 19: Installation Information

    inSTaLLaTiOn inFOrMaTiOn Parts supplied: For complete installation instructions go to the Document Links Page . Remove parts bag from dryer drum. Check that all parts were included. TOOLS anD ParTS • Foot boot (4) Gather the required tools and parts before •...

  • Page 20: Location Requirements

    LOcaTiOn rEquirEMEnTS recessed area and closet installation WARNING instructions: Commercial dryers may be installed in a recessed area or closet. For recessed area and closet installations, minimum clearances can be found in the Installation Instructions on the Document Links Page . Explosion Hazard The installation spacing is in inches and is Keep flammable materials and vapors,...

  • Page 21: Venting Requirements

    vEnTinG rEquirEMEnTS Flexible metal vent must be fully extended WARNING and supported when the dryer is in its final position. Remove excess flexible metal vent to avoid sagging and kinking that will result in reduced airflow and poor performance. An exhaust hood should cap the vent to avoid rodents and insects from entering the home or Fire Hazard business.
  • Page 22 vent System Length Multiple Dryer venting Maximum length of vent system depends • A main vent can be used for venting a group upon the type of vent used, number of elbows of dryers. Main vent should be sized to remove 200 CFM of air per dryer.
  • Page 23 if an exhaust hood cannot be used: The outside end of the main vent should have a sweep elbow directed downward. If the main vent travels vertically through the roof, rather than through the wall, install a 180° sweep elbow on the end of the vent at least 2 ft. (61 cm) above the highest part of the building.

  • Page 24: Gas Pipe Chart (Natural Gas)

    GaS PiPE cHarT (naTuraL GaS) EXAMPLE: The chart shows the maximum capacity in terms of cubic feet of gas per hour, for various The dryer has a rating of 30,000 BTU. If the sizes of pipe at lengths of from 10 feet to 200 average BTU rating of natural gas is 1000, feet.

  • Page 25: Theory Of Operation

    THEOrY OF OPEraTiOn STarTinG THE DrYEr WARNING WARNING Fire Hazard Explosion Hazard No washer can completely remove oil. Keep flammable materials and vapors, Do not dry anything that has ever had any such as gasoline, away from dryer. type of oil on it (including cooking oils). Do not dry anything that has ever had Do not dry items containing foam, rubber, anything flammable on it (even after washing).

  • Page 26: Air Intake And Exhaust

    air inTakE anD ExHauST Room temperature air (white arrows) enters The moistened heated air is drawn down the lower portion of the dryer through a gap through the lint filter, through the blower and formed behind the bottom of the lower front into the exhaust duct, where it is vented out of panel.

  • Page 27: Typical Cycle Of Operation

    TYPicaL cYcLE OF OPEraTiOn When WHITES AND COLORS is selected, 1. Thermal Fuse the high heat cycle is activated. The high temp 2. Exhaust Thermistor cycle uses the circuit that involves the 155°F 3. High temp cutout setting of the exhaust thermistor. 4.
  • Page 28 The broken belt switch is in series with the motor and has one of its leads connect directly to a terminal on the motor thermal overload. If either the broken belt switch or the motor thermal overload opens the circuit, it will stop the motor, which In turn will cause the motor centrifugal switch to open and change the positions of the motor switch, opening motor...

  • Page 29: Understanding The Gas Valve And Ignition System

    unDErSTanDinG THE GaS vaLvE anD iGniTiOn SYSTEM A significant voltage drop develops across The sensor, igniter and gas valve are interrelated and function as the ignition and the secondary coil, which renders both the heat source for gas dryers. At the start of the booster coil and the igniter ineffective due to cycle the radiant sensor contacts are closed, their low resistance and the reduced voltage...

  • Page 30: Cleaning The Dryer Location

    iMPOrTanT: WARNING • Do not run the dryer with the lint screen loose, damaged, blocked, or missing. Doing so can cause overheating and damage to both the dryer and fabrics. • If lint falls off the screen into the dryer during removal, check the exhaust hood and remove the lint.

  • Page 31: Cleaning The Dryer Interior

    cLEaninG THE DrYEr inTEriOr To clean dryer drum: Unplug dryer or disconnect power. Make a paste with powdered laundry detergent and very warm water. Close shutoff valve in gas supply line. Apply paste to a soft cloth, or, apply a liquid Clean lint screen (See page 3-6).

  • Page 32: Dryer Specs

    DrYEr SPEcS MDE22PD MDE25PD MDG22PD MDG25PD Model Number MDE25PR MDE22PR MDG22PR MDG25PR Matching Dryer for Matching Dryer for Model Description Front Load Washer Front Load Washer Electric Heater Gas Heat White with Brushed Stainless Steel Accents Color Capacity (Cu Ft)

  • Page 33: Component Access

    cOMPOnEnT accESS COMPONENT LOCATIONS FOUND BEHIND THE FRONT PANEL The components and their locations are shown below. Rear Bulkhead Central Control Unit Light Lens UIC Transformer Keypad Assembly Console User Interface Behind Display Lens Rear Drum Rollers Rear Drum Rollers Anti-Rattle Clip High-Limit Thermostat...

  • Page 34: Remove Facia And Display Lens

    rEMOvE Facia anD DiSPLaY LEnS TEcH TiP: If the facia does not lay flat against the front of the dryer, the gap can be corrected by applying double stick tape to the back of it, or by putting a reverse bow on the facia before reinstalling it on the dryer.

  • Page 35: Remove Control Panel Cover

    OPEn DrYEr TOP rEMOvE cOnTrOL PanEL cOvEr Electrical Shock Hazard Electrical Shock Hazard Disconnect power before servicing. Disconnect power before servicing. Replace all parts and panels before Replace all parts and panels before operating. operating. Failure to do so can result in death or Failure to do so can result in death or electrical shock.

  • Page 36: Remove Control Panel

    rEMOvE cOnTrOL PanEL Disconnect wire harness Rast connector from the CCU to UIC. Disconnect key pad ribbon connector by gently pulling it out of the connector. Disconnect transformer wire connector at Electrical Shock Hazard AA6. Disconnect power before servicing. Replace all parts and panels before Disconnect service switch wire connector at operating.

  • Page 37: Remove Keypad Assembly

    rEMOvE kEYPaD aSSEMBLY To remove buttons from subassembly, release locking tab on back side of subassembly. The other end simply slides out of a slot in the backer plate. Electrical Shock Hazard Locking Disconnect power before servicing. Replace all parts and panels before operating.

  • Page 38: Remove User Interface Control Board (Uic)

    rEMOvE uSEr inTErFacE cOnTrOL BOarD (uic) TEcH TiP: Connector J1 on the control board is for programming software onto the board. The jumper pins at J2 must be jumped for reprogramming and left open when in normal use. Electrical Shock Hazard Disconnect power before servicing.

  • Page 39: Remove Mounting Bracket For Transformer And Ccu

    rEMOvE MOunTinG BrackET FOr TranSFOrMEr anD ccu 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. Open dryer top (See page 4-3). Remove the 1/4” hex head screw from each end of bracket.

  • Page 40: Remove Transformer

    rEMOvE TranSFOrMEr nOTE: The screws for the transformer are shorter than other 1/4” hex head screws used in the dryer so the screw will not touch the drum below the bracket. Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating.

  • Page 41: Remove Ccu

    rEMOvE ccu Disconnect red and black wire connector by pulling connector off the control. Remove the 1/4” hex head screw that secures CCU to the bracket. Electrical Shock Hazard Turn bracket over and press the locking tab Disconnect power before servicing. on the bottom of the bracket.

  • Page 42: Remove Control Panel Bracket

    rEMOvE cOnTrOL PanEL BrackET Lift control panel bracket and turn it over setting it on the dryer drum. Use a pair of pliers to squeeze two Christmas tree clips to release wire ties from the bracket. Electrical Shock Hazard Christmas Disconnect power before servicing.

  • Page 43: Remove Dryer Top

    rEMOvE DrYEr TOP Pull wires through the hole in the top. 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. Remove two #2 Phillips head screws from Open service access door on the top of the each hinge where they are attached to the metercase.

  • Page 44: Remove Dryer Door

    rEMOvE DrYEr DOOr After removing three and loosening one screw, grasp the door and pull the hook of the hinge out of the slot in front panel, then lift door hinge off the remaining screw. Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating.

  • Page 45: Reversing A Dryer Door

    rEvErSinG a DrYEr DOOr Install hinge screw hole cover on opposite side of door opening. Align two pins on the back of cover with the two middle holes for the door hinge screw holes. Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating.
  • Page 46 Remove four Phillips head screws that Rotate outer door 180° to place handle on secure the hinge to the door. the opposite side of hinge location. Hinge Move hinge to other side and attach it with four screws just removed. There are two placement pins in the hinge that fit into two holes for correct hinge placement.

  • Page 47: Remove Door Handle

    rEMOvE DOOr HanDLE rEMOvE innEr DOOr SuPPOrT To remove door handle after door halves Separate door halves (See page 4-13). are separated (See page 4-13). Remove three Phillips head screws. Remove door handle (See left column on this page). Rotate inner lens slightly to release tabs that secure the inner lens to the front door half and lift lens out of door trim.

  • Page 48: Remove Drum Light Lens

    rEMOvE DruM LiGHT LEnS rEMOvE SErvicE PanEL Electrical Shock Hazard Electrical Shock Hazard Disconnect power before servicing. Disconnect power before servicing. Replace all parts and panels before Replace all parts and panels before operating. operating. Failure to do so can result in death or Failure to do so can result in death or electrical shock.

  • Page 49: Remove Front Panel

    rEMOvE FrOnT PanEL Remove two 1/4” hex head screws that secure the top of the front panel to the dryer. Two 1/4” Electrical Shock Hazard Disconnect power before servicing. Hex Head Replace all parts and panels before Screws operating. Failure to do so can result in death or electrical shock.

  • Page 50: Remove Lint Filter Housing

    rEMOvE LinT rEMOvE FrOnT FiLTEr HOuSinG BuLkHEaD Electrical Shock Hazard Electrical Shock Hazard Disconnect power before servicing. Disconnect power before servicing. Replace all parts and panels before Replace all parts and panels before operating. operating. Failure to do so can result in death or Failure to do so can result in death or electrical shock.

  • Page 51: Remove Outlet Grill

    rEMOvE OuTLET GriLL Lift outlet grill off front bulkhead. Separate the two halves of the outlet grill by pulling them apart. 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.

  • Page 52: Remove Drum Support Rollers And Shafts

    rEMOvE DruM SuPPOrT rOLLErS anD SHaFTS nOTE: When replacing a roller, always replace both tri-clips to ensure that roller will stay in position while running. nOTE: DO NOT lubricate this wheel or shaft. Clean shaft with fine steel wool to eliminate squeaks, or replace worn roller Electrical Shock Hazard supports.

  • Page 53: Remove A Baffle

    rEMOvE a BaFFLE Open dryer door and hold baffle with one hand while removing the third screw. Remove baffle from dryer and replace if necessary. 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.

  • Page 54: Remove Dryer Drum

    rEMOvE DrYEr DruM The dryer drum is installed with the drum clip, or hole, closer to the bulkhead at the rear of the dryer. This is opposite the orientation of drum in dryer that matches the top load washer. The support rollers roll in this direction without a thump, as they roll from the higher side to the lower side of the Electrical Shock Hazard...

  • Page 55: Remove Blower Wheel

    rEMOvE BLOWEr WHEEL To remove blower wheel when speed increaser belt is broken, slipping or missing, a thin 7/16” open end wrench will be needed to secure speed increaser shaft on its flat spot, in lieu of securing the motor pulley.

  • Page 56: Remove Thermistor

    rEMOvE THErMiSTOr rEMOvE THErMaL FuSE Electrical Shock Hazard Electrical Shock Hazard Disconnect power before servicing. Disconnect power before servicing. Replace all parts and panels before Replace all parts and panels before operating. operating. Failure to do so can result in death or Failure to do so can result in death or electrical shock.

  • Page 57: Remove Blower Housing

    rEMOvE BLOWEr HOuSinG 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. Remove blower wheel (See page 4-23). Remove wire connectors from thermistor and thermal fuse (See page 4-24).

  • Page 58: Remove Exhaust Duct

    rEMOvE ExHauST DucT TEcH TiP: When reinstalling exhaust duct, or for new dryer installations, ensure that the anti-vibration clip for the exhaust duct is installed on back panel of dryer. To install clip, slide long leg of clip into dryer along the exhaust duct.

  • Page 59: Remove Dryer Motor

    rEMOvE DrYEr MOTOr Remove motor wire harness by lifting locking tab with a flat blade screwdriver and pulling the plug off of the motor connector. Wire Harness Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating.

  • Page 60: Remove Motor Bracket

    rEMOvE MOTOr BrackET TEcH TiP: To reduce excess vibration transferred from the motor bracket to the cabinet, place anti-vibration pads, if they are missing, under the motor bracket. Install two pads if possible, or if only one is available then center it below the bracket. Electrical Shock Hazard Disconnect power before servicing.

  • Page 61: Remove Broken Belt Switch

    rEMOvE BrOkEn rEMOvE iDLEr BELT SWiTcH PuLLEY WHEEL Electrical Shock Hazard Electrical Shock Hazard Disconnect power before servicing. Disconnect power before servicing. Replace all parts and panels before Replace all parts and panels before operating. operating. Failure to do so can result in death or Failure to do so can result in death or electrical shock.

  • Page 62: Remove Drum Rear Support Rollers

    rEMOvE DruM rEar rEMOvE rEar SuPPOrT SuPPOrT rOLLErS rOLLEr SHaFTS Electrical Shock Hazard Electrical Shock Hazard Disconnect power before servicing. Disconnect power before servicing. Replace all parts and panels before Replace all parts and panels before operating. operating. Failure to do so can result in death or Failure to do so can result in death or electrical shock.

  • Page 63: Remove Rear Panel

    rEMOvE rEar PanEL Remove ten 1/4” hex head screws that secure the rear panel to the dryer. 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.

  • Page 64: Remove Dryer Side Panel (Left Side Shown)

    rEMOvE DrYEr SiDE PanEL (LEFT SiDE SHOWn) Support side panel and lift rear bulkhead and move it forward to release hook from the back edge of the side panel. Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating.

  • Page 65: Remove Rear Bulkhead

    rEMOvE rEar BuLkHEaD rEMOvE HEaT PLEnuM Electrical Shock Hazard Electrical Shock Hazard Disconnect power before servicing. Disconnect power before servicing. Replace all parts and panels before Replace all parts and panels before operating. operating. Failure to do so can result in death or Failure to do so can result in death or electrical shock.

  • Page 66: Remove Metercase

    rEMOvE METErcaSE Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating. Two 1/2” Hex Failure to do so can result in death or Head Bolts electrical shock. Lift metercase off the top of the dryer. Remove coin box.

  • Page 67: Remove Metercase Mounting Brackets

    rEMOvE METErcaSE rEMOvE SErvicE accESS MOunTinG BrackETS SWiTcH - PD MODEL Electrical Shock Hazard Electrical Shock Hazard Disconnect power before servicing. Disconnect power before servicing. Replace all parts and panels before Replace all parts and panels before operating. operating. Failure to do so can result in death or Failure to do so can result in death or electrical shock.

  • Page 68: Remove Coin Vault Switch - Pd Model

    rEMOvE cOin vauLT SWiTcH - PD MODEL 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. Remove coin box. Remove service access door from top of metercase.

  • Page 69: Remove Coin Drop - Pd Model

    rEMOvE cOin DrOP - PD MODEL nOTE: When reinstalling the coin drop ensure that wires connected to the coin sensor go straight back from the coin sensor. If wire goes forward it could break the beam of the coin sensor and show an error on the UIC.

  • Page 70: Remove Flame Sensor

    rEMOvE FLaME SEnSOr rEMOvE HiGH TEMP THErMOSTaT Electrical Shock Hazard Electrical Shock Hazard Disconnect power before servicing. Disconnect power before servicing. Replace all parts and panels before Replace all parts and panels before operating. operating. Failure to do so can result in death or Failure to do so can result in death or electrical shock.

  • Page 71: Remove High Temp Cutout

    rEMOvE HiGH rEMOvE iGniTOr TEMP cuTOuT Electrical Shock Hazard Electrical Shock Hazard Disconnect power before servicing. Disconnect power before servicing. Replace all parts and panels before Replace all parts and panels before operating. operating. Failure to do so can result in death or Failure to do so can result in death or electrical shock.

  • Page 72: Remove Gas Valve Coils

    rEMOvE GaS vaLvE cOiLS rEMOvE GaS vaLvE anD GaS vaLvE BrackET Electrical Shock Hazard Electrical Shock Hazard Disconnect power before servicing. Disconnect power before servicing. Replace all parts and panels before Replace all parts and panels before operating. operating. Failure to do so can result in death or Failure to do so can result in death or electrical shock.

  • Page 73: Remove Gas Valve From Bracket

    rEMOvE GaS vaLvE FrOM BrackET Remove three 1/4” hex head screws from bottom of bracket. 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. Three 1/4”...

  • Page 74: Remove Electric Heating Element

    rEMOvE ELEcTric HEaTinG ELEMEnT Lift bracket and heater assembly to remove the bottom edge of the assembly and press down to release the tab from inside the heat plenum at the back of the dryer. Electrical Shock Hazard Locking Disconnect power before servicing. Replace all parts and panels before operating.

  • Page 75: Remove Heater Coil

    rEMOvE HEaTEr cOiL Use a pair of pliers to hold the housing and another pair of pliers to pull heater coil up out of the housing. 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.

  • Page 76: Remove 180° Opening Door And Hinge

    rEMOvE 180° OPEninG DOOr anD HinGE The door hinge on the MDE/G25 dryer After removing three and loosening one swings completely open (180°). screw, grasp the door and pull the hook of the hinge out of the slot in front panel, then lift door hinge off the remaining screw.

  • Page 77: Remove Control Panel Cover And Snap In Display Lens

    rEMOvE cOnTrOL PanEL cOvEr anD SnaP in DiSPLaY LEnS Remove four T-20 security machine screws from the name plate. Support the name plate when removing the final screw. Electrical Shock Hazard Disconnect power before servicing. Replace all parts and panels before operating.
  • Page 78 ---- nOTES ---- 4-46...

  • Page 79: Component Testing

    cOMPOnEnT TESTinG 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. GaS vaLvE cOiLS The gas valve is actually a regulator and 2 valves in 1. Each valve is in series with the other.

  • Page 80: Burner Ignitor

    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. BurnEr iGniTOr ManOMETErS Insufficient gas flow can cause problems. When the dryer control calls for heat, line voltage is applied to the ignitor.
  • Page 81 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. How to use: When the gas is on, the amount of water column present is equal to the total amount Disconnect power supply to dryer.

  • Page 82: Flame Sensor

    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. FLaME SEnSOr HiGH TEMP THErMOSTaT & HiGH TEMP cuTOuT (GaS DrYErS OnLY) Unplug dryer or disconnect power. The high temp cutout is a non-resettable device.

  • Page 83: Heating Element (Electric Dryers Only)

    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. HEaTinG ELEMEnT (ELEcTric DrYErS OnLY) Unplug dryer or disconnect power. Remove the electric heating element. (See page 4-42).

  • Page 84: High Temp Cutout

    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. HiGH TEMP cuTOuT (ELEcTric DrYErS OnLY) Access the Electric Heating Element High Temp (See page 4-42). Cutout The high temp cutout is a non resettable High Temp...

  • Page 85: Centrifugal Switch

    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. cEnTriFuGaL SWiTcH Unplug dryer or disconnect power. If no continuity is found when the disc is depressed, change the centrifugal switch.

  • Page 86: Drive Motor

    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. DrivE MOTOr The motor features a leadless motor Set the ohmmeter to the R X 1 scale. connection, comprised of a quick connector Set digital ohmmeters to lowest scale.
  • Page 87 If the resistances at the motor are correct, check for a failed broken belt switch. Continuity test should show complete circuit (0 Ω). If the broken belt switch is okay, do same test for motor thermal overload. Motor Connector Broken Belt Switch...

  • Page 88: Thermistor

    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. THErMiSTOr Check the thermistor resistance value The table below gives the resistance values at any or all of the temperature levels in that should be observed for the various question, using the Dry Cycle, and the temperature settings.

  • Page 89: Thermal Fuse

    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. THErMaL FuSE Unplug dryer or disconnect power. The thermal fuse is wired in series with the drive motor.

  • Page 90: User Interface Membrane Switch

    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. uSEr inTErFacE MEMBranE SWiTcH Unplug dryer or disconnect power. 6 button user interface membrane switch Contact Contact Button...

  • Page 91: Transformer

    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. TranSFOrMEr Unplug dryer or disconnect power. Set the ohmmeter to the R X 1 scale. Set digital ohmmeters to lowest scale.

  • Page 92: Coin Drop Acceptor

    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. cOin DrOP accEPTOr The coin drop acceptor is used only in the The coin sensor is mounted to a bar located PD model dryers.

  • Page 93: Diagnosis & Troubleshooting

    If the set-up mode is entered and one of the following has previously occurred, the appropriate diagnostic code will be in the display. Electrical Shock Hazard Models MDE22PR, MDG22PR, MDE22PD and MDG22PD. Plug into a grounded 3 prong outlet. Do not remove ground prong. ACCU ®...

  • Page 94: Troubleshooting Guide

    TrOuBLESHOOTinG GuiDE 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. Some tests will require accessing components. See page 4-1 for component locations. nOTE: Possible Cause/Tests MUST be performed in the sequence shown for each problem. 1.

  • Page 95: Troubleshooting Tests

    TrOuBLESHOOTinG TESTS 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. Power Cord Terminal Block Electrical Shock Hazard Plug...
  • Page 96 GaS DrYEr Check the cable connecting the CCU to UIC is inserted all the way into the dryer CCU Unplug dryer or disconnect power. (control board) at P2 & onto UIC connector WC3. Remove the cover plate from the upper right corner of the back of the dryer.
  • Page 97 TEST #2 Motor circuit Test In a similar way, check the continuity between the L1 terminal of the plug and P9-2 (black wire) on the CCU control board. This test will check the wiring to the motor and (See page 6-11). the motor itself.
  • Page 98 Check the belt switch (See page 4-29), and Check for the resistance values of the motor drive motor (See page 4-27). Remove the Main and Start winding coils as shown drum belt from the spring loaded idler pulley below. (See page 4-22). nOTE: Main and Start winding coils must be checked at the motor.
  • Page 99 TEST #3 Heater Test • If the resistance reading goes from infinity to a few ohms as pulley arm closes the switch, belt switch is OK. If not, replace the This test is performed when either of the belt switch. following situations occur: •...
  • Page 100 Dryer does not heat: GaS DrYEr: ELEcTric DrYEr: Unplug dryer or disconnect power. Unplug dryer or disconnect power. Remove the service panel to access the thermal components (See page 4-16). Remove the service panel to access the thermal components. (See page 4-16). Perform TEST #3b.
  • Page 101 Begin with an empty dryer and clean lint If the exhaust temperature is not within specified limits, unplug dryer or disconnect screen. power. Plug in dryer or reconnect power. Check the resistance of the thermistor. Start a Drying cycle. nOTE: Thermistor resistance measurements must be made while dryer is disconnected from power.
  • Page 102 TEST #3b Thermal Fuse Test TEST #3d Gas valve Test, Gas Dryer Only ELEcTric DrYEr: The thermal fuse is Unplug dryer or disconnect power. wired in series with the dryer drive motor. Access the gas valve (See page 4-40). GaS DrYEr: The thermal fuse is wired in use an ohmmeter to determine if a gas series with the dryer gas valve.

  • Page 103: Central Control Unit Board Connections

    cEnTraL cOnTrOL uniT BOarD cOnnEcTiOnS Test #4 Door Switch Test Activate Diagnostic Test Mode, and perform a Door Switch Test. Functionality can be verified by the appearance of a degree symbol above a digit each time door is closed, but goes away when the door is opened again.

  • Page 104: Troubleshooting Dryer Operation

    TrOuBLESHOOTinG DrYEr OPEraTiOn Dryer will not run no heat • Is there anything in the display lit? • Has a household fuse blown, or has a circuit breaker tripped? If not, check incoming voltage, RFI filter, and transformer connections. The drum may be turning, but there may not be heat.

  • Page 105: Unusual Sounds

    unusual sounds Dryer displaying code message “----” Indicates failure mode, enter • Has the dryer had a period of non-use? • diagnostics mode to get the code displayed If the dryer has not been used for a while, then check the diagnostic codes table there may be a thumping sound during the (See page 6-1).

  • Page 106: Troubleshooting Dryer Results

    TrOuBLESHOOTinG DrYEr rESuLTS clothes are not drying satisfactorily, drying times too long, or load is too hot is the lint screen clogged with lint? is the dryer located in a closet? • • Lint screen should be cleaned before each Closet doors must have ventilation openings load.

  • Page 107: Lint On Load

    Lint on load is the lint screen clogged? • Clean lint screen. Check for air movement. Stains on load or drum Was dryer fabric softener properly used? • Add dryer fabric softener sheets at the beginning of the cycle. Fabric softener sheets added to a partially dried load can stain garments.

  • Page 108: Dryer Diagnostic Mode

    Help Code Description DrYEr DiaGnOSTic MODE HELP MODE SuB MEnu This mode is entered by pressing DELICATES Display Step Indication Explanation for one second while in set-up code 6 (or while dAS displays if operating with 1h.XX Help Code 1, where XX is the help code number.

  • Page 109: Wiring Diagrams

    WirinG DiaGraMS...
  • Page 117 ---- nOTES ----...

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