Maytag MLE/MLG23PDF, MDE/MDG21PRA manual Stack Dryer Troubleshooting Guide, Display Is Blank

Page 29

Troubleshooting Procedures

!W ARNING

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

Stack Dryer Troubleshooting Guide

Display Is

Blank

Make sure both

 

 

 

 

Enter operator

 

 

 

 

 

 

 

 

 

mode using

 

 

 

 

See Diagnostic

dryers are plugged

 

 

 

 

 

 

 

 

 

 

 

 

service switch. Is

 

Yes

 

 

code Trouble

into live power

 

 

 

 

 

 

 

 

 

 

 

diagnostic code

 

 

 

 

Shooting Guide.

 

 

 

 

 

 

 

 

source.

 

 

 

 

 

 

 

 

 

 

 

 

displayed?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unplug dryers. Check wiring

and terminations between transformer, service switch and control board.

Initiate reset sequence. If

problem persists Yes replace control

board.

Plug in dryer. Does 115VAC appear across the primary of the transformer?

Yes

Does each of 6.7 VAC,

22.6VAC and 20.7 VAC appear across

transformer secondary?

No

No

Check wiring to

transformer, power

at outlet and

breaker.

Replace the transformer. Inspect control board for burned components and replace it if damaged.

Abnormal

Display Or

Function

Upper or

Cycle power to

 

 

Initiate a service

 

 

If problem

 

 

If problem persist,

 

 

 

 

persists, initiate

 

 

replace control

both dryers.

 

 

cycle.

 

 

 

 

 

 

 

 

reset sequence.

 

 

board.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Lower Dryer

Has Zero

Minutes

Remaining

In Display.

Open

corresponding dryer door. Did display change?

Yes

The dryer door must be opened after the end of a cycle. This is a safety check on the door switch.

No

Unplug both dryers and

open doors. Check continuity of problem door switch and replace it if shorted.

 

 

 

 

 

 

 

 

Check wiring and

 

Does door switch

 

 

 

 

termination

 

open and close

 

Yes

 

 

between door

 

 

 

 

 

properly?

 

 

 

 

switch and control

 

 

 

 

 

 

 

 

 

board.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace door

 

 

 

 

If problem persist,

switch.

 

 

 

replace control board.

 

 

 

 

 

 

 

 

 

 

 

©2004 Maytag Appliances Company

16022904 Rev. 0

29

Image 29
Contents Commercial Single Stack Dryers Important Information Table of Contents Important Safety Information Proper Grounding and Polarization of 120 Volts Wall Outlets About Ground WiresGeneral Information Related Publications Explanation Grounding InstructionsParts and Accessories ServiceModel Identification Commercial Dryer NomenclatureAir movement measured in cubic feet per minute TERMINOLOGY/DEFINITIONS Term DefinitionsWater 1 o F HOW IT Works GAS Valve AssemblyRadiant Sensor Contact Closed Function of Gas Valve SystemPower Interruptions Safety FeaturesGas Conversions Ignition FailuresGeneral Information Exhaust Ducts General SpecificationsWattage Specifications Drive Motor Check Electrical TroubleshootingAir Shutter Adjustment Centrifugal SwitchMotor Test Cord Drive Motor TestManometers How to UseWill Not Shut-Off Mechanical Troubleshooting Will Not RunWill Not Dry Noisy and/Or VibrationSingle Dryer Troubleshooting Guide Cannot Enter Or Dryer Stopped with Zero Minutes Remaining DisplayExit OperatorDropped Into Machine Credited Are Eventually Lost Display Flashes User ModeKey Inputs Control Does NotRespond To Dryer Drum Will Not Turn To Coin 1 or ResponseWill not Respond to handheld Will Not Keep Time Of Day During Power InterruptionsNo Decimal Point Is UsedDryer Will Not Heat Dryer Diagnostic Program Single Dryer Diagnostic ProgramDoor Sense Problem Single Dryer Diagnostic CodeVAC Display Is Blank Stack Dryer Troubleshooting GuideAbnormal Display Or Function Upper or Lower Dryer Has Zero Minutes Remaining DisplayBoard Does ControlNot KeypadsKeep Time Day Response To Coin Or CoinDuring InterruptionCannot Dryer Runs Without Program Selection Drum Will Not Turn Stack Dryer Diagnostic Program D1 or d17 Door Sense Problem Stack Dryer Diagnostic CodeVoltage Problem Control Panel Touch Pad AssemblyMicroprocessor Board TransformerCoin Vault Switch Service Door SwitchDoor Assembly Coin SensorFront Panel Reversing Door AssemblyDoor Disassembly Top Cover Door SwitchOutlet Duct, Shroud & Tumbler Front Front Shroud Assembly RemovalBearing & Pads Lint FilterFront Seal BeltBaffles Rear Shroud AssemblyInstalling Drive Belt Back Seal Roller and Bearing AssemblyThermostats Blower AssemblyCycling Thermostat Low-cycling ThermostatBlower Idler Arm Assembly Exhaust Duct Pipe Assembly BreakdownMotor Switch Drive Motor Assembly Igniter Gas Valve AssemblyCoils Combustion Cone Gas ValveInlet Duct Heater EnclosureStack Dryer Sloped Front Models Service Panel and SwitchAccess Cover Coin Drop MicroprocessorSwing Out Away Remove ScrewsStack DRYER-MN Models Stack Dryer Sloped Front PRTimer Push-To-Start SwitchSelector Switch Machine-In-Use LightStack 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 Dryer Help Mode Dryer Diagnostic ModeAll Single Load Models Stacked Models Only