Maytag MDG25PN User manual

W10251146B
MODELS:
MDE22PD, MDG22PD, MDE22PN, MDG22PN
MDE25PD, MDG25PD, MDE25PN, MDG25PN
Maytag Commercial
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* PN model converted to PR

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WHIRLPOOL CORPORATION assumes no responsibility
for any repairs made on our products by anyone other than
authorized Commercial Laundry Service Professionals.
Copyright © 2011, Whirlpool Corporation, Benton Harbor, MI 49022
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This Maytag Service Manual, ”High Efciency Single Load Gas and Electric Dryers
50Hz Models” (Part No. W10251146B), provides the Commercial Laundry Service
Professional with information on the installation, operation, and service of the
High Efciency model 22 & 25 dryers. For specic information on the model being
serviced, refer to the “Installation Instructions,” or “Tech Sheet” provided with the
dryer. The Wiring Diagrams used in this Service Manual are typical and should be
used for training purposes only. Always use the Wiring Diagram supplied with the
dryer when servicing.
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The goal of this Service Manual is to provide information that will enable the
Commercial Laundry Service Professional to properly diagnose malfunctions and
repair the High Efciency Single Load Gas and Electric Dryers. The objectives of
this Service Manual are to:
Understand and follow proper safety messages.
Successfully diagnose installation related problems.
Successfully troubleshoot and diagnose malfunctions.
Successfully perform necessary repairs.
Successfully return the dryer to its proper operational status.
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View entire service video .................................................................................................. vi
Document links ................................................................................................................. vi
................................................................................................................................. 1-1
Model number designations.............................................................................................. 1-2
Serial number designations .............................................................................................. 1-2
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 Efciency product.................................... 1-12
............................................................................................... 2-1
Tools and parts .................................................................................................................2-1
Location requirements ...................................................................................................... 2-2
Venting requirements........................................................................................................ 2-3
Gas pipe chart (Natural gas)............................................................................................. 2-6
........................................................................................................ 3-1
Starting the dryer .............................................................................................................. 3-1
Air intake and exhaust ...................................................................................................... 3-2
Typical cycle of operation ................................................................................................. 3-3
Understanding the gas valve and ignition system ............................................................ 3-5
Cleaning the dryer location ............................................................................................... 3-6
Cleaning the lint screen .................................................................................................... 3-6
Cleaning the dryer interior ................................................................................................ 3-7
Removing accumulated lint............................................................................................... 3-7
Vacation and moving care ................................................................................................ 3-7
Dryer gas specs................................................................................................................ 3-8
 ........................................................................................................... 4-1
Remove facia and display lens - Model 22 ....................................................................... 4-2
Remove control panel cover ............................................................................................. 4-3
Open dryer top.................................................................................................................. 4-3
Remove control panel....................................................................................................... 4-4
Remove keypad assembly................................................................................................ 4-5
Remove user interface control board (UIC) ...................................................................... 4-6
Remove CCU mounting bracket ....................................................................................... 4-7
Remove UIC & step-down transformers ........................................................................... 4-8
Remove central control unit (CCU)................................................................................... 4-9
Remove control panel bracket .......................................................................................... 4-10
Remove dryer top ............................................................................................................. 4-11
Remove dryer door ........................................................................................................... 4-12
Reverse dryer door ........................................................................................................... 4-13
Remove door handle ........................................................................................................ 4-15
Remove inner door support .............................................................................................. 4-15
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Remove drum light lens .................................................................................................... 4-16
Remove service panel ...................................................................................................... 4-16
Remove front panel .......................................................................................................... 4-17
Remove lint lter housing ................................................................................................. 4-18
Remove front bulkhead..................................................................................................... 4-18
Remove outlet grill ............................................................................................................ 4-19
Remove drum support rollers and shafts.......................................................................... 4-20
Remove drum bafe ......................................................................................................... 4-21
Remove dryer drum .......................................................................................................... 4-22
Remove blower wheel ...................................................................................................... 4-23
Remove thermistor ........................................................................................................... 4-24
Remove thermal fuse........................................................................................................ 4-24
Remove blower housing ................................................................................................... 4-25
Remove broken belt switch............................................................................................... 4-25
Remove exhaust duct ....................................................................................................... 4-26
Remove dryer motor ......................................................................................................... 4-27
Remove motor bracket ..................................................................................................... 4-28
Remove idler assembly parts ........................................................................................... 4-29
Remove drum rear support rollers .................................................................................... 4-30
Remove rear support roller shafts .................................................................................... 4-30
Remove rear panel ........................................................................................................... 4-31
Remove dryer side panel (left side shown)....................................................................... 4-32
Remove rear bulkhead ..................................................................................................... 4-33
Remove heat plenum........................................................................................................ 4-33
Remove metercase........................................................................................................... 4-34
Remove metercase mounting brackets ............................................................................ 4-35
Remove service access switch - PD model...................................................................... 4-35
Remove coin vault switch - PD model .............................................................................. 4-36
Remove coin drop - PD model.......................................................................................... 4-37
Remove ame sensor....................................................................................................... 4-38
Remove high temp thermostat.......................................................................................... 4-38
Remove high temp cutout................................................................................................. 4-39
Remove ignitor.................................................................................................................. 4-39
Remove auto transformer - gas dryers ............................................................................. 4-40
Remove gas valve coils .................................................................................................... 4-41
Remove gas valve assembly ............................................................................................ 4-42
Remove gas valve from bracket ....................................................................................... 4-43
Remove electric heating element ..................................................................................... 4-44
Remove heater coil........................................................................................................... 4-45
Remove 180° opening door and hinge ............................................................................. 4-46
Remove control panel cover and snap-in display lens ..................................................... 4-47
Page

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........................................................................................................... 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).................................................... 5-4
Heating element (electric dryers)...................................................................................... 5-5
High temp cutout............................................................................................................... 5-6
(electric dryers) ................................................................................................................. 5-6
Centrifugal switch ............................................................................................................. 5-7
Drive motor ....................................................................................................................... 5-8
Thermistor......................................................................................................................... 5-9
Thermal fuse..................................................................................................................... 5-10
User interface membrane switch ...................................................................................... 5-11
UIC transformer ................................................................................................................ 5-12
Step-down transformer - Model 22 dryers ........................................................................ 5-13
Auto transformer - gas dryers ........................................................................................... 5-14
Coin drop acceptor ........................................................................................................... 5-15
 ..................................................................................... 6-1
Proper Earthing of 240 volt wall outlets ............................................................................ 6-1
Diagnostic codes .............................................................................................................. 6-1
Troubleshooting guide ...................................................................................................... 6-2
Troubleshooting tests........................................................................................................ 6-3
Troubleshooting dryer operation ....................................................................................... 6-11
Troubleshooting dryer results ........................................................................................... 6-13
Diagnostic mode ............................................................................................................... 6-15
Dryer help mode ............................................................................................................... 6-15
Central control unit (CCU) connections ............................................................................ 6-16
User interface control (UIC) connections.......................................................................... 6-16
................................................................................................................. 7-1
Model 22 PD electric models ............................................................................................ 7-1
Model 22 PD gas models.................................................................................................. 7-1
Model 22 PN electric models ............................................................................................ 7-2
Model 22 PN gas models.................................................................................................. 7-2
Model 25 PD gas models.................................................................................................. 7-3
Model 25 PD electric models ............................................................................................ 7-3
Model 25 PN gas models.................................................................................................. 7-4
Model 25 PN electric models ............................................................................................ 7-4
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vi
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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 below to open the attached document.
This symbol means a video clip is available. Click the mouse on the camera icon
to view the video. To close the movie, click the X box at the top corner of the video window.

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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 nished, but failure may occur at a later date due
to ESD stress.
• Use an anti-static wrist strap. Connect wrist strap to green Earth
connection point or unpainted metal in the appliance
-OR-
Touch your nger repeatedly to a green Earth connection point or
unpainted metal in the appliance.
• Before removing the part from its package, touch the anti-static bag to a
green Earth connection point or unpainted metal in the appliance.
• Avoid touching electronic parts or terminal contacts; handle electronic
control assembly by edges only.
• When repackaging failed electronic control assembly in anti-static bag,
observe above instructions.
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MODEL nuMBEr DESiGnaTiOnS
25
MODeL nuMBer M DG 25P a G W 0
BranD
M Maytag
DriVe TYPe
DG Automatic Dryer Gas
PrODuCT
22 Commercial HE Dryer
PAYMENT TYPE
PD Processor Coindrop
PN Processor Non-coin
MarKeTinG CODe
A First series
B Second series
VOLTaGe CODe
W 120V-60Hz (US)
X 120V-60Hz (Canada)
G 220-240V-50Hz (Export Models)
COLOr
W White
enGineerinG CHanGe (nuMeriC)
SeriaL nuMBer DeSiGnaTiOnS
SeriaL nuMBer HL W 35 10901
DiViSiOn reSPOnSiBiLiTY
M Marion, Ohio
HL Monterrey, MX
Year OF PrODuCTiOn
W = 2008
Y = 2009
0 = 2010
1 = 2011
WeeK OF PrODuCTiOn
35 35th Week in the calendar year
ManuFaCTurinG SeQuenCe nuMBer
DE Automatic Dryer Electric
2 = 2012
3 = 2013
4 = 2014
5 = 2015
Commercial HE Dryer
SEriaL nuMBEr DESiGnaTiOnS
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Location of Tech Sheet, Parts List & Wiring Diagram
Inside The Service Panel
Location of Model & Serial Number Label

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15
MAYTAG COMMERCIAL WASHER, DRYER, STACKED DRYER/
DRYER, COMMERCIAL STACK LAUNDRY, AND MULTI-LOAD
COIN OPERATED COMMERCIAL WASHERS AND DRYERS
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. Proof of original purchase date
is required to obtain service under this warranty.
ITEMS MAYTAG WILL NOT PAY FOR
1. All other costs including labor, transportation, or custom duties.
2. Service calls to correct the installation of your commercial appliance, to instruct you how to use your commercial appliance, to
replace or repair fuses, or to correct external wiring or plumbing.
3. Repairs when your commercial appliance is used for other than normal, commercial use.
4. Damage resulting from improper handling of product during delivery, theft, accident, alteration, misuse, abuse, fire, flood, acts of
God, improper installation, installation not in accordance with local electrical or plumbing codes, or use of products not approved
by Maytag.
5. Pickup and Delivery. This commercial appliance is designed to be repaired on location.
6. Repairs to parts or systems resulting from unauthorized modifications made to the commercial appliance.
7. The removal and reinstallation of your commercial appliance if it is installed in an inaccessible location or is not installed in
accordance with published installation instructions.
8. Chemical damage is excluded from all warranty coverage.
9. Changes to the building, room, or location needed in order to make the commercial appliance operate correctly.
DISCLAIMER OF IMPLIED WARRANTIES; LIMITATIONS OF REMEDIES
CUSTOMER'S SOLE AND EXCLUSIVE REMEDY UNDER THIS LIMITED WARRANTY SHALL BE PRODUCT REPAIR AS PROVIDED
HEREIN. IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE,
ARE LIMITED TO ONE YEAR OR THE SHORTEST PERIOD ALLOWED BY LAW. WHIRLPOOL SHALL NOT BE LIABLE FOR
INCIDENTAL OR CONSEQUENTIAL DAMAGES. SOME STATES AND PROVINCES DO NOT ALLOW THE EXCLUSION OR LIMITATION
OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, OR LIMITATIONS ON THE DURATION OF IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS, SO THESE EXCLUSIONS OR LIMITATIONS MAY NOT APPLY TO YOU. THIS WARRANTY GIVES
YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO HAVE OTHER RIGHTS, WHICH VARY FROM STATE TO STATE OR PROVINCE
TO PROVINCE.
If you need service, please contact your authorized Maytag Commercial Laundry distributor. To locate your authorized Maytag
Commercial Laundry distributor, or for web inquiries, visit www.MaytagCommercialLaundry.com.
9/07
For written correspondence:
Maytag Commercial Laundry Service Department
2000 M-63 North
Benton Harbor, Michigan 49085 USA