American Dryer Corp ML-170, ML-145 service manual No Heat Drive and Blower Motors Run Gas Models

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E.“No Heat” Drive and Blower Motors Run (Gas Models)...

1.Check for voltage across L1 and GND of the HSI module.

If no voltage is present, then check for voltage from terminal #14 on the blower contactor to ground. If no voltage is present, the problem is with blower contactor.

If voltage is present, the problem is faulty wire or termination between blower contactor and HSI module.

2.If voltage is present, check for voltage across terminal “W” and “GND” of the HSI module. If voltage is present, the problem is faulty HSI module.

If no voltage is present, then check voltage at J10 6 pin connector on the Phase 6 computer.

If voltage is present, the problem is faulty wire or terminal between HSI module and Phase 6 computer.

If voltage is not present, then there is a possible problem in the safety circuits (if this is the case the computer should be displaying an error code). If this is not the case than the Phase 6 computer is faulty.

F.“No Heat” Drive and Blower Motors Run (Steam Models)...

1.Check for voltage across pin #3 and #4 of the J13 6 pin connector. If voltage is present, the problem is faulty steam damper solenoid.

If no voltage is present, check for voltage across pin 3 and 4 of the J12 9 pin connector.

If voltage is present, the problem is faulty wire or termination between J12 connector and J13 connector. If no voltage is present, check for voltage across pin 1 and 2 of the J6 4 pin connector.

If voltage is present, the problem is faulty wire or terminal between the J6 4 pin connector and J12 9 pin connector.

If no voltage is present, check for voltage between pin 5 of the J10 connector and ground. If voltage is present, the problem is faulty wire or terminal between J1 and J6 connector. If no voltage is present, check for voltage across pin 4 of the J10 connector and ground. If voltage is present, the problem is faulty computer board.

If no voltage is present, check for voltage between pin 1 of the J10 connector and ground.

If voltage is present, the problem is fault wire or termination between pin 1 and 4 of the J10 connector. If no voltage is present, the problem is faulty computer.

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Contents ML-145 / ML-170 American Dryer CorporationRetain This Manual In a Safe Place For Future Reference For Your Safety Page Table of Content Section Technical Information Safety Precautions Important InformationStandards Routine Maintenance CleaningAdjustments LubricationInstallation Requirements ENCLOSURE, AIR SUPPLY, and Exhaust RequirementsElectrical and GAS Requirements Operational Service Check Procedure Gas 10.5 inches water column 26.1 mb Description of Parts Control Panel MicroprocessorControl Panel NON-MICROPROCESSOR Control BOXGAS Burner Assembly HSI HOT Surface Ignition ModuleGas Models only Drive MotorIdler Assembly Blower Motor and Impellor GAS and SteamTumbler Basket Bearing and Pulley Arrangement Main Door Switch Sail Switch Gas Models onlyTumbler Basket Automatic Reset Thermostat HI-LIMIT Gas Models onlyLint Drawer Lint Drawer Switch Temperature Sensor Bracket NON-COMPUTERSteam Damper System Compressed AIR RequirementsServicing IntroductionComputer Controls To Replace ComputerTo Replace Keyboard Touchpad Label Assembly To Replace Microprocessor Temperature Sensor ProbeTo Remove Flame Probe Assembly Ignition ControlsTo Replace Gas Valve Refer to above burner illustration To Test and Adjust Gas Water Column Pressure To Replace Main Burner OrificesTo Convert from Natural Gas to L.P. Gas To Replace Burner TubesTo Replace HSI Hot Surface Ignition Module ThermostatsTo Replace Burner Hi-Limit Thermostat Gas Models Only Sail Switch Assembly Gas Models only To Replace Sail SwitchTo Adjust Sail Switch To Replace Main Door AssemblyTo Install New Main Door Glass To Replace Front PanelTo Replace Main Door Hinge Blocks PulleysTo Replace Tumbler Basket Pulley To Replace Small Idler Pulley To Replace Large Idler PulleyTumbler Basket Assembly Tumbler Basket Alignment Vertical Up and Down AdjustmentTo Replace Motor Pulley Tumbler Basket Alignment Lateral Side to Side Adjustment To Replace Tumbler Basket or Tumbler Basket SupportImportant Never strike the shaft directly with a hammer To Replace Front Tumbler Basket Support Pillow Block Bearing To Replace Front Idler Shaft Pillow Block BearingBelt Tension Adjustment Tumbler Basket to Idler To Replace Rear Idler Shaft Pillow Block BearingBelts Refer to illustrations in section F Pulleys Belt Tension Adjustment Motor to Idler To Replace V-BeltsMotors To Replace Drive MotorImpellor Lint Drawer Assembly To Replace Lint Screen To Replace Lint Drawer SwitchTroubleshooting Computer will not accept keyboard touchpad entriesDisplay is reading Rotation Sensor Fail Display is reading no AirflowDisplay is reading Sail Switch Fail Display is reading Drum Safety FailDisplay is reading Burner Safety Fail Display is reading No HeatDisplay is reading Burner Control Failure Display is reading Burner Flame FailureDisplay is reading Main Door Display is reading Lint DoorDisplay is reading Hot Dryer operates but is taking too long to dryThermal overload for drive motor is tripping Overload for impellor fan motor is tripping There is excessive vibration coming from the tumbler basketElectrical Troubleshooting Phase 6 OPL System Diagnostics Diagnostic L.E.D. light emitting diode Display Failure CodesPage E.D. light emitting diode Display Indicators E.D. Display Indicator NumberE.D. Display Indicator Number FAN Blower Output L.E.D. light emitting diode Indicator AIR AIR JET Output L.E.D. Indicator OptionalHT1 Heat Output L.E.D. Indicator Fuse Main Fuse Input L.E.D. Indicator Lint Lint Door Input L.E.D. IndicatorMain Main Door Input L.E.D. Indicator Drum Tumbler Basket HI-LIMIT Input L.E.D. IndicatorFlame bURNER Control Fail Input L.E.D. Indicator Power Supply Input L.E.D. IndicatorD. DISPLAY/CODES E.D. Display Operating StatusPhase 6 OPL Microprocessor L.E.D. Displays E.D. Codes 1. Display Codes ALL REVGAS Models only Power 24 VAC is not Evident AT GAS Valve GAS/ELECTRIC only BURNER/OVEN Open HI-LIMIT CircuitGAS only Ignition Attempt Failure Computer Logic and Wiring Diagram No Display Condition Blower motor does not operate, drive motor runs No Heat Drive and Blower Motors Run Gas Models No Heat Drive and Blower Motors Run Steam ModelsDoor Condition Technical Information Motor Plate High and LOW VoltageData Label Information on the Data LabelUsing a Manometer How to Use a ManometerML-170 Tool List ADC 450429 1- 02/18/00-25