American Dryer Corp AD-95 No display on computer, Computer will not accept key pad entries

Page 42

SECTION VI

Troubleshooting

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

ELECTRICAL PARTS SHOULD ALWAYS BE CHECKED FOR FAILURE BEFORE BEING RE- TURNED TO THE FACTORY.

The information provided should not be misconstrued as a device for use by an untrained person in making repairs. Only properly licensed technicians should service the equipment.

OBSERVE ALL SAFETY PRECAUTIONS DISPLAYED ON THE EQUIPMENT OR SPECIFIED IN THIS MANUAL WHILE MAKING REPAIRS.

Refer to section "Electrical Troubleshooting" for a detailed troubleshooting procedure for electrical components.

1.No display on computer.

A.Open circuit breaker switch or blown fuse.

B.Tripped blower motor overload.

C.Bad wiring connection.

D.Bad transformer.

E.Emergency stop button is depressed.

F.Faulty microprocessor (computer controller).

2.Computer will not accept key pad entries.

A.Key pad ribbon is not plugged into computer securely.

B.Faulty keypad.

C.Faulty microprocessor (computer controller).

3.Dryer will not start, but computer display indictors are on.

A.Failed contactors.

B.Failed arc suppressor (A.S.) board

C.Failed microprocessor (computer).

D.Failed motors.

4.Drive motor runs, burner is on, but basket will not turn.

A.Broken, damaged or loose v-belt.

B.Belts contaminated (oil, grease, etc.).

C.Loose or broken pulley.

5.Dryer operates but is taking too long to dry.

A.Improperly programmed microprocessor.

B.An inadequate exhaust duct work system.

38

Image 42

Contents AD-95/ML-95 Retain This Manual In a Safe Place For Future Reference For Your Safety Page Table of Content Troubleshooting Safety Precautions SectionDays CleaningWeekly MonthsAdjustments Seven Days after Installation and every 6 MonthsLubrication Enclosure, Air Supply, and Exhaust Requirements Electrical and Gas RequirementsOperational Service Check Procedure Prior to February 11 Control Panel Microprocessor As of February 11With circuit breaker Reversing Relay Panel With fusesGas Burner Assembly HSI Module Gas ModelsDrive Motor Blower Motor and ImpellerTaperlock Trantorque Drive Shaft Assembly Idler Shaft Assembly Transtorque TaperlockMain Door Switch Basket TumblerSail Switch Gas Models Only Hi-Limit Gas Models OnlyAutomatic Reset Thermostat Lint ScreenLint Drawer Switch Servicing Computer ControlsTo Replace Keyboard Label Assembly Ignition Controls To Remove Flame Sensor ProbeHSI Ignitor Flame Sensor Probe To Test and Adjust Gas Water Column Pressure To Replace Gas Valve See burner illustration onTo Replace Main Burner Orifices To Convert Natural Gas to L.P. Gas To Replace Burner TubesDiscontinue power to the dryer To Replace HSI ModuleSail Switch Assembly Gas Models Only To Replace Sail SwitchTo Adjust Sail Switch To Install New Main Door Glass as of October 24 To Replace Main Door SwitchTo Replace Main Door Assembly Front Panel and Main Door AssembliesAs of October 24 Prior to October 24 To Install new Main Door Glass prior of October 24 To Replace Front PanelTo Replace Main Door Hinge Block Pulleys To Replace Drive Shaft Pulley To Replace Drive Motor PulleyPage Tumbler Wheel Replacement on IdlerAssembly taper lock models Tumbler Wheel Replacement on IdlerAssembly trantorque models To Replace Blower Shaft PulleyBasket Assembly To Replace Blower Motor PulleyTo Replace Drive Assembly Pillow Block Bearing Belt Adjustment Motor to Drive AxleTo Replace Idler Shaft Pillow Block Bearing To Replace Drive Motor V-Belts MotorsTo Replace Impeller Motor Fan Shaft Drive To Replace Blower Motor V-belts To Replace Front Thruster WheelsRear Access ImpellerLint Screen Assembly To Replace Lint Door SwitchTo Replace Lint Screen Dryer will not start, but computer display indictors are on No display on computerComputer will not accept key pad entries Drive motor runs, burner is on, but basket will not turnBurner hi-limit safety thermostat is tripping Thermal overload for drive motor is trippingOverload for impeller fan motor is tripping There is excessive vibration coming from the basket Phase 6 OPL System Diagnostics Page E.D. Display Indicators E.D Display Indicator Number AIR AIR JET Output L.E.D. Indicator Optional FAN Blower Output L.E.D. IndicatorFuse Main Fuse Input L.E.D. Indicator Flame bURNER Control Fail Input L.E.D. Indicator E.D. Codes BURNER Control Fail BURNER Safety FailDRUM Safety Fail BURNER Flame FailComputer Logic and Wiring Diagram No Display Condition Drive motor reverses but does not forward, blower motor runs Blower motor does not operate, drive motor runsLint Door Condition Main Door ConditionMicroprocessor Which Must be Reset Manually Technical Information For exampleData Label HOW to USE a Manometer AD-95/ML-95 Tool List ADC450188 1- 01/14/99-25