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Service
This manual is to be used by qualified appliance
technicians only. Maytag does not assume any
responsibility for property damage or personal
injury for improper service procedures done by
an unqualified person.
This Base Manual covers general information
Commercial
Refer to individual Technical Sheet
for information on specific models
This manual includes, but is
Top Load
not limited to the following:
MAT12PDA
Washer MAT12PDB
MAT12PDC
MAT12PDD
MAT12PDS
MAT12PRA
MAT12PRB
MAT12PRD
MAT12PRS
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Important Information Important Notices for Servicers and Consumers Maytag will not be responsible for personal injury or property damage from improper service procedures. Pride and workmanship go into every product to provide our customers with quality products. It is possible, however, that during its lifetime a product may require service. Products should be serviced only by a qualified service technician who is familiar with the safety procedures required in the repair and who is equipped
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Table of Contents Important Information .................................................... 2 Disassembly Procedures(continued) ............................... Important Safety Information ......................................... 4 Pressure Switch ....................................................... 19 General Information Air Dome ..................................................................19 Model Identification .................................................... 7 Water Valve .....
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Important Safety Information local codes and be made by licensed personnel ! WARNING when required. Do not do it yourself unless you know how! To reduce the risk of fire, electric shock, serious injury • To reduce the risk of fire, clothes which have traces or death to persons when using your washer, follow of any flammable substances such as vegetable oil, these basic precautions: cooking oil, machine oil, flammable chemicals, thinner, etc. or anything containing wax or chemicals • Read all ins
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Important Safety Information About Ground Wires In the event of an electrical short circuit, a ground wire ! WARNING reduces the risk of electric shock by providing an escape wire for the electric current. To avoid personal injury or death from improper Standard accepted color coding for ground wires is green servicing, make sure you read and understand the or green with a yellow stripe. descriptions and meaning of various safety symbols, Grounding wires and wires colored like grounding wires wo
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Important Safety Information Explanation Polarization–This means that the larger slot must be neutral and the small slot must be at line voltage. Mispolarized–The outlet is incorrectly wires so that the larger slot is at line voltage and the smaller slot is neutral. Grounded–This means the round hole connection is con- nected to earth ground through a connection to the main power panel. Ungrounded–The round hole connection is not complete to earth ground and/or the main power panel. Grounding In
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General Information Model Identification Service Model and serial number is located on the back of the Keep a copy of sales receipt for future reference or in console and cabinet. It is important that you keep a case warranty service is required. To locate an authorized record for future reference. distributor: • For Maytag product call your distributor or visit the • For Maytag product call your distributor or visit the Web Site at www.maytagcommerciallaundry.com Web Site at www.maytagcommerci
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is important to understand that water pressure is the General Information operation force in the water valve. HOW IT WORKS When the valve operating solenoid is energized, a The cycles are made up of three basic operations Fill, magnetic field is produced that lifts the plunger away from agitate and drain/spin. These operations are sequenced the pressure release hole in the center of the diaphragm. by the controls (timer or microprocessor board) to provide The pressure in the guide tube area is
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General Information rotates down the shaft, a lug on the pulley comes against a drive lug which is splined to the helical drive shaft. At this point the drive shaft turns with the pulley. The pulley bearing which merely resting on top of the pulley also DRIVE MOTOR rotates with the pulley, drive lug and helical drive shaft. When the water level/pressure switch is satisfied circuits are completed to the main drive motor. The drive motor is At the top of the drive shaft is a spined gear. As it
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General Information WARNING ! To avoid risk of electrical shock, personal injury or death from improper servicing, make sure you understand the proper procedures and usage of tools listed, before attempting any procedures described in the manual. Failure to understand and comply with safety information may result in severe personal injury or death. TOOLS FOR SERVICING The following is a list of tools used to service the commercial top load washer. Part Number Description Test Meters Applian
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Troubleshooting Procedures ! WARNING To avoid risk of electrical shock, personal injury or death, disconnect power to unit before servicing, unless testing requires power. Mechanical Troubleshooting There are a number of factors which can contribute to noisy or improper washer operation. Some of these are listed below along with areas to check for possible corrections. Condition Possible Cause 1. Vibration Noise • Control cover loose • Front panel loose • Entire washer o weak floor constr
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Troubleshooting Procedures ! WARNING To avoid risk of electrical shock, personal injury or death, disconnect power to unit before servicing, unless testing requires power. Drive Lug Adjustment 3/8” Pulley 1. Disconnect power supply to unit. 2. Turn the drive pulley onto the shaft clockwise until all play is taken up. Lug 3. Holding the pulley in this position, the distance between drive and pulley lugs should be 3/8”. 4. Turn pulley counterclockwise and check to see that the drive lug and p
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Troubleshooting Procedures ! WARNING To avoid risk of electrical shock, personal injury or death, disconnect power to unit before servicing, unless testing requires power. Continuity test of “load” devices will show varying levels of ELECTRICAL TROUBLESHOOTING resistance from very low for some transformer and motor windings to very high for some timer motors and The malfunction of an electrical circuit cannot easily be components on control boards. Usually it is more diagnosed unless you first
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Troubleshooting Procedures ! WARNING To avoid risk of electrical shock, personal injury or death, disconnect power to unit before servicing, unless testing requires power. COMPONENT TESTING Illustration Component Test Procedure Results Pressure Switch Disconnect wire terminals from switch. Resistance above 2 Ω indicates dirty Measure resistance across the switch contacts. following terminals: Empty (Filling) 20 to 15-------------------- Closed circuit Full (Run) 20 to 15 ------
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Troubleshooting Procedures ! WARNING To avoid risk of electrical shock, personal injury or death, disconnect power to unit before servicing, unless testing requires power. Agitation Spin Windings Wiring Harness Connections Readings Run Winding Red to White or Black 1.5Ω Start Winding Yellow to Blue 3Ω Over-load White to Black 0 Ω Note: Export Motors-run windings 4.9Ω, start windings 20.5Ω, over-load 0 Ω. ©2003 Maytag Appliances Company 16022842 Rev. 0 15
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Disassembly Procedures To avoid risk of electrical shock, personal injury or death; ! WARNING disconnect power to unit before servicing. Control Panel 1. Disconnect power supply to unit. 2. Remove top two T-20H Torx screws located on the front of the control panel. 3. Carefully lay the control panel forwards. Note: Use a protective cloth to minimize the chance of scratching the panel on the control console. 5. Squeeze tabs to remove connectors from timer. MN (Manual) Model Timer 1. Disconnect
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Disassembly Procedures To avoid risk of electrical shock, personal injury or death; ! WARNING disconnect power to unit before servicing. 5. Lay control panel forward. Touch pad 6. Remove wires from switch (note switch position) and 1. Disconnect power supply to unit. remove switch. 2. Remove all four T-20H Torx screws securing control panel facia. Note: When replacing switch, note the position of “top” 3. Remove Control Panel. on the switch. 4. Remove Control Board. 5. Remove two Pozi-drive scre
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Disassembly Procedures To avoid risk of electrical shock, personal injury or death; ! WARNING disconnect power to unit before servicing. Reversing Motor Relay 1. Disconnection power supply to unit. 2. Remove all four T-20H Torx screws securing control panel facia. 3. Disconnect all wires attached to Reversing Motor Relay. 4. Remove single screw securing relay. Note: Notice the positioning tab for ease in mounting and locating relay onto the Control Panel. Lid Switch Assembly (After series 15) 1.
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Disassembly Procedures To avoid risk of electrical shock, personal injury or death; ! WARNING disconnect power to unit before servicing. Reinstalling Lid Switch 1. Insert the lid switch assembly in the Top Cover (Push Pressure Switch the switch assembly straight down and back until it 1. Disconnect power supply to unit. locks in place). 2. Remove Control Panel. 3. Disconnect wires attached to the switch. WRONG! 4. Remove clamp securing Air Dome Hose. 5. Remove two screws securing Pressure Switch
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Disassembly Procedures To avoid risk of electrical shock, personal injury or death; ! WARNING disconnect power to unit before servicing. Water Valve 5. Remove Control Panel. 1. Disconnect power supply to unit. 6. Remove screws securing console to meter case. 2. Remove screw holding Valve Bracket to back panel. 7. Remove two nuts (one inside coin box area and inside 3. Pivot out until flange clears back and lift up to service access door compartment.). disengage the bracket from the slot on th
