Maytag MDE/MDG21PDD Centrifugal Switch, Motor Test Cord, Drive Motor Test, Air Shutter Adjustment

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Troubleshooting Procedures

!W ARNING

To avoid risk of electrical shock, personal injury or death, disconnect power to unit before servicing, unless testing requires power.

Winding

Terminal

Terminal

Ohms

 

 

 

 

Start

3

4

3.00

 

 

 

 

Run

5

4

2.25

 

 

 

 

Centrifugal Switch

Checking heater/gas valve and motor:

1.Disconnect the wire harness from the motor.

2.Place ohm meter leads to terminals 1 and 2.

3.With your thumbs, depress the BROWN disc located behind the motor switch on the motor shaft. The BROWN disc actuates the lever of the motor switch when the motor is at rest. At optimum motor speed, the disc moves away from the switch lever. When the disc is pressed in toward the windings, the actuator arm of the centrifugal switch will be relaxed. This allows the contacts to close, completing the heater circuit. If no continuity is found when the disc is depressed, change the centrifugal switch.

Motor

Switch

"Brown" Disc

Switch Actuator

Side View of Motor

Motor Test Cord

A motor test cord may be used to electrically check operation of the various electrical components without removing them from the unit. Testing in this manner determines whether or not the part will function independently of other electrical components. In order to make an accurate test, proper connection of the motor test cord is important.

Drive Motor Test

The motor may be checked in the dryer or removed and checked.

Air Shutter Adjustment

The air shutter has been stamped "LP" and "N" (for Natural). Loosen the screw holding the shutter, rotate the shutter until the end of the slot (labeled for the gas to be used) contacts the screw. Tighten the screw to lock the shutter in place.

Two test leads are required to check operation of the drive motor. To check the motor for operation, hook the test cord to terminals 4 and 5.

©2004 Maytag Appliances Company

16022904 Rev. 0

Gas Type

Natural

LP

BTU Per

1050

2050

Cu. Ft

 

 

Pressure

3.5

11

Switch

 

 

Specific

0.65

1.53

Gravity

 

 

Orifice

41

53

Size

 

 

15

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Contents Commercial Single Stack Dryers Important Information Table of Contents Important Safety Information About Ground Wires General Information Related PublicationsProper Grounding and Polarization of 120 Volts Wall Outlets Explanation Grounding InstructionsCommercial Dryer Nomenclature ServiceParts and Accessories Model IdentificationTERMINOLOGY/DEFINITIONS Term Definitions Water 1 o FAir movement measured in cubic feet per minute HOW IT Works GAS Valve AssemblyRadiant Sensor Contact Closed Function of Gas Valve SystemIgnition Failures Safety FeaturesPower Interruptions Gas ConversionsGeneral Information General Specifications Wattage SpecificationsExhaust Ducts Drive Motor Check Electrical TroubleshootingDrive Motor Test Centrifugal SwitchAir Shutter Adjustment Motor Test CordManometers How to UseNoisy and/Or Vibration Mechanical Troubleshooting Will Not RunWill Not Shut-Off Will Not DrySingle Dryer Troubleshooting Guide Operator Dryer Stopped with Zero Minutes Remaining DisplayCannot Enter Or ExitDropped Into Machine Credited Are Eventually Lost Display Flashes User ModeControl Does Not Respond ToKey Inputs Dryer Drum Will Not Turn To Coin 1 or ResponsePoint Is Used Will Not Keep Time Of Day During Power InterruptionsWill not Respond to handheld No DecimalDryer Will Not HeatDryer Diagnostic Program Single Dryer Diagnostic ProgramDoor Sense Problem Single Dryer Diagnostic CodeVAC Lower Dryer Has Zero Minutes Remaining Display Stack Dryer Troubleshooting GuideDisplay Is Blank Abnormal Display Or Function Upper orKeypads ControlBoard Does NotInterruption Response To Coin Or CoinKeep Time Day DuringCannot Dryer Runs Without Program Selection Drum Will Not Turn Stack Dryer Diagnostic Program D1 or d17 Door Sense Problem Stack Dryer Diagnostic CodeVoltage Problem Transformer Touch Pad AssemblyControl Panel Microprocessor BoardCoin Sensor Service Door SwitchCoin Vault Switch Door AssemblyReversing Door Assembly Door DisassemblyFront Panel Top Cover Door SwitchOutlet Duct, Shroud & Tumbler Front Front Shroud Assembly RemovalBelt Lint FilterBearing & Pads Front SealRear Shroud Assembly Installing Drive BeltBaffles Back Seal Roller and Bearing AssemblyLow-cycling Thermostat Blower AssemblyThermostats Cycling ThermostatBlower Exhaust Duct Pipe Assembly Breakdown Motor Switch Drive Motor AssemblyIdler Arm Assembly Gas Valve Assembly CoilsIgniter Heater Enclosure Gas ValveCombustion Cone Inlet DuctService Panel and Switch Access CoverStack Dryer Sloped Front Models Coin Drop MicroprocessorSwing Out Away Remove ScrewsStack DRYER-MN Models Stack Dryer Sloped Front PRMachine-In-Use Light Push-To-Start SwitchTimer Selector SwitchStack DRYER-FLAT Front Models Front Shroud AssemblyMotor & Heater Relays Appendix a Pricing Programming ProceduresFixed Vend Pricing SET UP Codes Money Counter Option Steps 3. thru 9. codes are skipped if mode 2.00 is selected00 7.STARTING of Special Pricing Hour Value of Coin 2 Canadian Dollar Drop White & Colors keypad Example Stacked Models Only Dryer Diagnostic ModeDryer Help Mode All Single Load Models