American Dryer Corp AD-95 service manual Servicing, Computer Controls

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SECTION V

Servicing

Introduction

ALL electrical and mechanical service or repairs should be made with the electrical power to the dryer disconnected (power off).

WARNING: PERSONAL INJURY COULD RESULT

The information provided in this section should not be misconstrued as a device for use by an untrained person making repairs. Service work should be performed by competent technicians in accordance with local, state, and federal codes. When contacting the factory for assistance, always have the dryer model and serial numbers available.

CAUTION: Observe ALL safety precautions displayed on the dryer or specified in this manual before and while making repairs.

Before considering replacement, make sure that ALL connectors are in place and making proper contact.

A. Computer Controls

To Replace Input/Output Board Reversing (Prior to February 11, 1998)

1.Discontinue power to the dryer.

2.Disconnect the nine (9) pin connector, six (6) pin connector, four (4) pin connector and a two (2) pin connector from the computer panel by squeezing the clip on the pin connector and pulling the plug away from the board.

3.Disconnect the green ground wire from the board

4.Disconnect the ribbon cable assembly from the input/output board reversing.

5.Remove the two (2) screws securing the input/output board to the sheet metal control panel. Remove the board by pulling the other two corners off the clinch studs.

6.Install new reversing input/output board by reversing this procedure.

To Replace Display Board

1.Discontinue power to the dryer.

2.Unplug keyboard ribbon from the rear of the computer.

3.Unplug ribbon cable assembly from the rear of the computer.

4.Remove the two (2) screws securing the computer to the computer box door. Remove the computer by pulling the other two corners off the clinch studs.

5.Install new display by reversing this procedure.

To Replace Computer Board

1. Disconnect power to dryer.

2. Unplug keyboard ribbon from rear of computer.

3. Unplug all wiring harnesses connected to the computer board.

4. Remove the two (2) screws securing the computer to the computer panel. Remove the computer by pulling the other two corners off the clinch studs.

5. Install new computer by reversing this procedure.

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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 MonthsSeven Days after Installation and every 6 Months AdjustmentsLubrication 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 To Remove Flame Sensor Probe Ignition ControlsHSI Ignitor Flame Sensor Probe To Replace Gas Valve See burner illustration on To Test and Adjust Gas Water Column PressureTo Replace Main Burner Orifices To Convert Natural Gas to L.P. Gas To Replace Burner TubesDiscontinue power to the dryer To Replace HSI ModuleTo Replace Sail Switch Sail Switch Assembly Gas Models OnlyTo 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 Replace Front Panel To Install new Main Door Glass prior of October 24To 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 PulleyBelt Adjustment Motor to Drive Axle To Replace Drive Assembly Pillow Block BearingTo Replace Idler Shaft Pillow Block Bearing Motors To Replace Drive Motor V-BeltsTo Replace Impeller Motor Fan Shaft Drive To Replace Blower Motor V-belts To Replace Front Thruster WheelsRear Access ImpellerTo Replace Lint Door Switch Lint Screen AssemblyTo 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 turnThermal overload for drive motor is tripping Burner hi-limit safety thermostat 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