American Dryer Corp AD-95 service manual No Display Condition

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1.No Display Condition

A.Check position of emergency stop to verify it is in operating position (pull or twist for operating position).

B.Check fuse one or two and if either are blown, replace

C.Take voltage reading across the microprocessor (J7) 9-pin connector pins 1 and 2. If no voltage is present at pins 1 and 2, double check the secondary (24VAC) side of transformer at the blower motor contactor number 13 to ground if no voltage is present check primary voltage to trans- former.

D.Check voltage across fuses 1 and 2 to ground. If voltage is present, check emergency stop red and black wire to ground. If voltage is present, check voltage across 95 and 96 to ground of the drive motor overload. If voltage is present, check 95 and 96 to ground of the blower motor overload. If voltage is present and transformer terminations are good, then the transformer is bad. Refer to the schematic supplied with the dryer to assist in the troubleshooting of the dryer.

NOTE : In this next section all voltage checks must be done in the operating mode with the appropriate microprocessor dot on. Also appropriate L.E.D. output light on.

NOTE: In this next section when checking for voltage you are looking for 25 AC volts unless otherwise specified.

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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 Section Safety PrecautionsMonths CleaningWeekly DaysSeven Days after Installation and every 6 Months AdjustmentsLubrication Electrical and Gas Requirements Enclosure, Air Supply, and Exhaust RequirementsOperational Service Check Procedure As of February 11 Prior to February 11 Control Panel MicroprocessorWith fuses With circuit breaker Reversing Relay PanelHSI Module Gas Models Gas Burner AssemblyBlower Motor and Impeller Drive MotorTaperlock Trantorque Drive Shaft Assembly Transtorque Taperlock Idler Shaft AssemblyBasket Tumbler Main Door SwitchHi-Limit Gas Models Only Sail Switch Gas Models OnlyLint Screen Automatic Reset ThermostatLint Drawer Switch Computer Controls ServicingTo 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 Replace Burner Tubes To Convert Natural Gas to L.P. GasTo Replace HSI Module Discontinue power to the dryerTo Replace Sail Switch Sail Switch Assembly Gas Models OnlyTo Adjust Sail Switch Front Panel and Main Door Assemblies To Replace Main Door SwitchTo Replace Main Door Assembly To Install New Main Door Glass as of October 24As 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 To Replace Drive Motor Pulley Pulleys To Replace Drive Shaft PulleyPage Tumbler Wheel Replacement on IdlerAssembly taper lock models To Replace Blower Shaft Pulley Tumbler Wheel Replacement on IdlerAssembly trantorque modelsTo Replace Blower Motor Pulley Basket AssemblyBelt 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 Front Thruster Wheels To Replace Blower Motor V-beltsImpeller Rear AccessTo Replace Lint Door Switch Lint Screen AssemblyTo Replace Lint Screen Drive motor runs, burner is on, but basket will not turn No display on computerComputer will not accept key pad entries Dryer will not start, but computer display indictors are onThermal 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 FAN Blower Output L.E.D. Indicator AIR AIR JET Output L.E.D. Indicator OptionalFuse Main Fuse Input L.E.D. Indicator Flame bURNER Control Fail Input L.E.D. Indicator E.D. Codes BURNER Flame Fail BURNER Safety FailDRUM Safety Fail BURNER Control FailComputer Logic and Wiring Diagram No Display Condition Blower motor does not operate, drive motor runs Drive motor reverses but does not forward, blower motor runsMain Door Condition Lint Door ConditionMicroprocessor Which Must be Reset Manually For example Technical InformationData Label HOW to USE a Manometer AD-95/ML-95 Tool List ADC450188 1- 01/14/99-25