American Dryer Corp MDG-50 Troubleshooting, No L.E.D. light emitting diode display

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SECTION VII

TROUBLESHOOTING

IMPORTANT: YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY and THE GAS SUPPLY BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINE TO ALLOWACCESS FOR CLEANING,ADJUSTING, INSTALLATION, or TESTING OFANY EQUIPMENT per OSHA(Occupational Safety and HealthAdministration)

STANDARDS.

The information provided will help isolate the most probable components associated with the difficulty described. The experienced technician realizes, however, that a loose connection or broken or shorted wire may be at fault where electrical components are concerned and not necessarily the suspected component itself.

Electrical parts should always be checked for failure before being returned to the factory.

The information provided should not be misconstrued as a handbook for use by an untrained person making repairs.

IMPORTANT: When replacing blown fuses, the replacement must be of the exact rating as the fuse being replaced.

WARNING: ALL SERVICE and TROUBLESHOOTING SHOULD BE PERFORMED BY A QUALIFIED PROFESSIONAL OR SERVICE AGENCY.

WARNING: WHILE MAKING REPAIRS, OBSERVE ALL SAFETY PRECAUTIONS DISPLAYED ON THE DRYER or SPECIFIED IN THIS MANUAL.

MICROPROCESSOR (COMPUTER) MODELS

A.No L.E.D. (light emitting diode) display

1.Service panel fuse blown or tripped breaker.

2.Blown control circuit L1 or L2 1/2-amp (Slo Blo) fuse.

3.Failed microprocessor controller (computer).

4.Failed step down transformer (for models 380 volts or higher ONLY).

B.Drive motor not operating (does not start)

1.Failed drive motor contactor (relay).

2.Failed arc suppressor (A.S.) board (for Reversing Models ONLY).

3.Failed drive motor.

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Contents MDG-50 Installation Manual Retain This Manual In a Safe Place For Future Reference For Your Safety Page Table of Contents Section Routine Maintenance Important Information SectionPersonal Injury or Fire could Result Safety PrecautionsPage Specifications SpecificationsSpecifications Unpacking and Setting UP Installation ProceduresLocation Requirements Dryer Enclosure Requirements Fresh AIR Supply Exhaust Requirements Single Dryer Venting Illus. B Multiple Dryer Common Venting ILLUS. D Importantventingreminders Electrical Requirements Electrical InformationMust be Provided Odfn Klwh Uhhq Important a Circuit Serving Each Dryer Must be Provided DG-50 GAS Injury and Improper Operation of the Dryer GAS InformationType of GAS Page Page Preparation for Operation and START-UP Preoperational Tests Preoperational Instructions Page OPL Models Shut Down Instructions Parts ServiceSection Returning Warranty CardsCleaning Routine MaintenanceLubrication AdjustmentsDrive motor not operating does not start TroubleshootingNo L.E.D. light emitting diode display Blower motor not operating does not start Microprocessor controller computer display reads door Microprocessor computer display reads dSFLNo heat, ignitor sparks, burner goes on and off right away Dryer operates but is taking too long to dry Dryer or scraping noise at basket tumbler area Condensation on main door glassDrive motor only not operating Excessive noise or vibrationMain burners are burning with a yellow flame Dryer operates but is taking too long to dry load Heating unit not operating ALL temperature selectionsBlower motor only not operating Dryer is cycling on hi-limit thermostat Data Label Technical InformationSerial Number Timing Legend Reversing Timer SPIN/DWELL AdjustmentsProcedure for Functional Check Replacement Components Direct Spark Ignition DSI System 10/30/00-150