ADC ML-82 service manual Main Door Condition, Temp Sensor Fail Check

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d.If no voltage is present at J7 9-pin connector no. 3 to ground, then voltage should not be present at no. 5 to ground. Replace the microprocessor controller (computer).

6.Main Door Condition

NOTE: Make sure main door and lint door are closed. Also, if checking either switch, the plunger must be depressed.

a.Check L.E.D. (light emitting diode) input light “MAIN” on the component side of the computer. If the light is on, replace the computer.

b.Check voltage (24 VAC) from J7 9-pin connector no. 5 to ground. If voltage is present, check no. 6 to ground. If voltage is present, replace board.

c.If no voltage is present at J7 9-pin connector no. 6 to ground, but voltage is present at no. 5 to ground. The problem is a bad switch, bad wires or terminations J7 to J5, or J5 to main door switch.

7.“No Heat” drive and blower motors run, display reads normal (gas models).

a.Check L.E.D. input light “HT1” on the component side of the computer. If the light is on replace the board.

b.If the L.E.D. input light “HT1” on the component side of the computer is on and there is no voltage to the Hot Surface Ignitor (HSI) module “w” the display will read “BURNER CONTROL FAIL.” The problem is bad wires or terminations between microprocessor and HSI module.

c.If voltage is present on the HSI module “w” to ground. Check voltage at the gas valve if voltage is present across the two (2) “yellow” wires at the gas valve and the gas supply is on then the fault is that of the gas valve.

8.“Temp Sensor Fail Check”

a.Replace the temperature sensor underneath the basket on a bracket (the bullet shaped device).

b.If it still read “TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE,” unplug J3 4-pin connector from the temperature sensor bracket. Also, unplug the microprocessor J14 4-pin connector from the computer board. Take a continuity reading from J14 no. 1 to J3 no. 1, then from J14 no. 2 to J3 no. 2.

If there is no continuity, check for break in wire, a short to the ground, loose terminations, or even replace the wire.

If there is continuity, microprocessor controller (computer) is faulty.

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Contents ML-82 Retain This Manual In a Safe Place For Future Reference For Your Safety Page Table of Contents Section SERVICE/PARTS Information Safety Precautions Important InformationStandards SPECIFICATIONS/COMPONENT Identification SpecificationsSpecifications MLG-82 Gas MLS-82 Steam Component Identification Page Routine Maintenance CleaningAdjustments LubricationLint Drawer Lint Drawer Switch Control Panel AssemblyDoor Switch Assembly Description of PartsBasket and Support Assembly Temperature Sensor Bracket AssemblyTumbler Bearing Assembly Idler ARM Assembly DRIVE/FAN Mount AssemblyBlower Motor HSI HOT Surface Ignition Burner BOX Assembly Sail Switch AssemblyFront Panel Assembly Reversing Relay Panel Servicing IntroductionComputer Controls To Replace Keyboard Label AssemblyTo Replace Microprocessor Temperature Sensor Probe To Replace Computer BoardTo Remove Flame Sensor Probe Ignition ControlsTo Remove Hot Surface Ignitor HSI Ignitor Flame Sensor ProbeTo Test and Adjust Gas Water Column Pressure To Replace Gas Valve Refer to burner illustration onTo Replace Main Burner Orifices To Convert Natural Gas to L.P. Gas To Replace Burner Tubes To Replace HSI ModuleTo Replace Burner HI-LIMIT Thermostat GAS Models only Sail Switch Assembly GAS Models only To Replace Sail Switch To Adjust Sail SwitchTo Replace Main Door Assembly To Install New Main Door GlassTo Replace Front Panel To Replace Main Door Hinge BlockSteam Controls Installation To Replace Steam Coil Damper SystemTo Replace the 3-Way Micro Valve To Replace PistonTo Replace The Needle Valve To Replace Steam CoilTumbler and Bearing Assembly To Replace Tumbler Pulley ReversingTo Replace The Rear Tumbler Bearing To Replace Idler Pulley Idler Shaft and Bearing AssemblyTo Replace The Front Tumbler Bearing To Replace Idler BearingDrive Pulley Tumbler BasketTumbler Alignment Vertical Tumbler Alignment Lateral To Replace The Tumbler And/Or Tumbler SupportBelt Tension Adjustment-Tumbler To Idler Belts Refer to Illustrations in Sections I and KBelt Tension Alignment Motor To Idler To Replace V-BeltsPhase 6 OPL System Diagnostics Diagnostic L.E.D. Display Failure CodesPage E.D. Light Emitting Diode Display Indicators E.D. Display Indicator NumberPage HT1 Heat Output L.E.D. Indicator FAN Blower Output L.E.D. light emitting diode IndicatorAIR AIR JET Output L.E.D. Indicator Optional Fuse Main Fuse Input L.E.D. IndicatorDrum Tumbler HI-LIMIT Input L.E.D. Indicator Lint Lint Door Input L.E.D. light emitting diode IndicatorMain Main Door Input L.E.D. Indicator Sail Sail Switch Input L.E.D. IndicatorPower Supply Input L.E.D. Indicator E.D. Codes GAS/ELECTRIC only BURNER/OVEN Open HI-LIMIT Circuit Fault CodesGAS Models only Power 24 VAC is not Evident AT GAS Valve GAS only Ignition Attempt FailureTroubleshooting Computer will not accept keypad touchpad entriesDrive motor runs, burner is on, but basket will not turn Dryer operates but is taking too long to dryThermal overload for drive motor is tripping Burner hi-limit safety thermostat is tripping Overload for impellor fan motor is trippingThere is excessive vibration coming from the basket Electrical Troubleshooting No Display Condition Drive motor reverses but does not forward, blower motor runsBlower motor does not operate, drive motor runs Lint Door ConditionMain Door Condition Temp Sensor Fail CheckTechnical Information Motor Plate High and LOW VoltageFor example Data Label Contact American Dryer CorporationData Label Model Dryer American Gas Association, Canadian Gas AssociationManual Reset HI-LIMIT Instructions Computer Logic SERVICE/PARTS Information ServiceParts Warranty Information Returning Warranty CardsReturning Warranty Parts Page ML-82 Tool List ADC 450404 1- 12/21/99-50