American Dryer Corp ML-145, ML-170 service manual Door Condition

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G. “Door” Condition

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

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

2.Check voltage (24 VAC) between pin 5 and ground of the J7 9 pin connector. If no voltage is present, the problem is faulty computer.

If voltage is present, check for voltage between pin 6 and ground of the J7 9 pin connector. If no voltage is present, the problem is faulty wire or termination in the door switch circuit. If voltage is evident, the problem is faulty computer.

H.Microprocessor (Computer) reads “Temp Sensor Failure Check Temp Sensor Fuse”

NOTE: Before continuing with this section check the .125 MA fuse on the compute board.

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

2.If it still displays the error code, unplug the 4 pin connector from the temperature sensor bracket. Also, unplug the microprocessor 15 pin connector from the computer board. Where the white/red striped wire is going into the connector, take a continuity reading across the wire and that same wire from the 4 pin connector that you unplugged earlier in this paragraph.

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

If there is continuity, do the same thing to the black wire right next to the white/red striped wire in the 15 pin connector.

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

If there is continuity, computer board is faulty.

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Contents American Dryer Corporation ML-145 / ML-170Retain This Manual In a Safe Place For Future Reference For Your Safety Page Table of Content Section Technical Information Important Information Safety PrecautionsStandards Cleaning Routine MaintenanceLubrication AdjustmentsENCLOSURE, AIR SUPPLY, and Exhaust Requirements Installation RequirementsElectrical and GAS Requirements Operational Service Check Procedure Gas 10.5 inches water column 26.1 mb Control Panel Microprocessor Description of PartsControl Panel NON-MICROPROCESSOR Control BOXHSI HOT Surface Ignition Module GAS Burner AssemblyGas Models only Drive MotorBlower Motor and Impellor GAS and Steam Idler AssemblyTumbler Basket Bearing and Pulley Arrangement Sail Switch Gas Models only Main Door SwitchTumbler Basket HI-LIMIT Gas Models only Automatic Reset ThermostatLint Drawer Temperature Sensor Bracket NON-COMPUTER Lint Drawer SwitchSteam Damper System Compressed AIR RequirementsIntroduction ServicingComputer Controls To Replace ComputerTo Replace Microprocessor Temperature Sensor Probe To Replace Keyboard Touchpad Label AssemblyIgnition Controls To Remove Flame Probe AssemblyTo Replace Gas Valve Refer to above burner illustration To Replace Main Burner Orifices To Test and Adjust Gas Water Column PressureTo Replace Burner Tubes To Convert from Natural Gas to L.P. GasThermostats To Replace HSI Hot Surface Ignition ModuleTo Replace Burner Hi-Limit Thermostat Gas Models Only To Replace Sail Switch Sail Switch Assembly Gas Models onlyTo Replace Main Door Assembly To Adjust Sail SwitchTo Replace Front Panel To Install New Main Door GlassPulleys To Replace Main Door Hinge BlocksTo Replace Tumbler Basket Pulley To Replace Large Idler Pulley To Replace Small Idler PulleyTumbler Basket Alignment Vertical Up and Down Adjustment Tumbler Basket AssemblyTo Replace Motor Pulley To Replace Tumbler Basket or Tumbler Basket Support Tumbler Basket Alignment Lateral Side to Side AdjustmentImportant Never strike the shaft directly with a hammer To Replace Front Idler Shaft Pillow Block Bearing To Replace Front Tumbler Basket Support Pillow Block BearingTo Replace Rear Idler Shaft Pillow Block Bearing Belt Tension Adjustment Tumbler Basket to IdlerBelts Refer to illustrations in section F Pulleys To Replace V-Belts Belt Tension Adjustment Motor to IdlerMotors To Replace Drive MotorImpellor To Replace Lint Drawer Switch Lint Drawer Assembly To Replace Lint ScreenComputer will not accept keyboard touchpad entries TroubleshootingDisplay is reading no Airflow Display is reading Rotation Sensor FailDisplay is reading Drum Safety Fail Display is reading Sail Switch FailDisplay is reading Burner Safety Fail Display is reading No HeatDisplay is reading Burner Flame Failure Display is reading Burner Control FailureDisplay is reading Main Door Display is reading Lint DoorDryer operates but is taking too long to dry Display is reading HotThermal overload for drive motor is tripping There is excessive vibration coming from the tumbler basket Overload for impellor fan motor is trippingElectrical Troubleshooting Diagnostic L.E.D. light emitting diode Display Failure Codes Phase 6 OPL System DiagnosticsPage E.D. Display Indicator Number E.D. light emitting diode Display IndicatorsE.D. Display Indicator Number AIR AIR JET Output L.E.D. Indicator Optional FAN Blower Output L.E.D. light emitting diode IndicatorHT1 Heat Output L.E.D. Indicator Lint Lint Door Input L.E.D. Indicator Fuse Main Fuse Input L.E.D. IndicatorMain Main Door Input L.E.D. Indicator Drum Tumbler Basket HI-LIMIT Input L.E.D. IndicatorPower Supply Input L.E.D. Indicator Flame bURNER Control Fail Input L.E.D. IndicatorE.D. Display Operating Status D. DISPLAY/CODESPhase 6 OPL Microprocessor L.E.D. Displays ALL REV E.D. Codes 1. Display CodesGAS/ELECTRIC only BURNER/OVEN Open HI-LIMIT Circuit GAS Models only Power 24 VAC is not Evident AT GAS ValveGAS 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 Steam Models No Heat Drive and Blower Motors Run Gas ModelsDoor Condition Motor Plate High and LOW Voltage Technical InformationInformation on the Data Label Data LabelHow to Use a Manometer Using a ManometerML-170 Tool List ADC 450429 1- 02/18/00-25