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

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6.bURNER CONTRL FAIL - This routine monitors the ignition control’s gas valve output response. If the valve output signal is not present from the ignition control within the valve time limits the Phase 6 microprocessor controller (computer) determines the ignition control has failed. If this occurs when the cycle is active the machine will display “bURNER CONTRL FAIL.” If the tumbler (basket) temperature is above 100º F (38º C) the machine will continue to display “bURNER CONTRL FAIL.” The machine will run with no heat for three (3) minutes or until the temperature drops below 100º F (38º C). If the tumbler (basket) temperature is below 100º F (38º C) upon failure the machine will shut down and display “bURNER CONTRL FAIL” with an audio indication.

7.bURNER FLAME FAIL - This routine allows two (2) flame out retries to occur before proceeding into the error. The count of two (2) will be established every time the call for heat was to occur. Only if it reaches the count of two (2) before the tumbler (basket) temperature has reached the set temperature will this error be triggered. The machine will run with no heat for three (3) minutes or until the temperature drops below 100º F (38º C). If the tumbler (basket) temperature is below 100º F (38º C) upon failure, the machine will shut down and display “bURNER FLAME FAIL” with an audio indication. This process will occur every time the heat output is active.

8.MAIN dOOR - This monitors the door circuit. If the machine was not active and the main door was opened the display would read “REAdY.” If a program attempt was made with the main doors open the display will read “MAIN dOOR” with an audio indication. If the machine is active and the main door was opened the display would read “MAIN dOOR” with no audio indication and the dryer will shut down. Once the main door has closed the display would read “PRESS START” press the “ENTER/START” I key and it will continue the programmed cycle.

9.LINT dOOR - This monitors the lint drawer/door circuit. If the machine was not active and the lint drawer/door was opened the display would read “REAdY.” If a program attempt was made with the lint drawer/door open the display would read “LINT dOOR” with an audio indication. If the machine was active and the lint drawer/door was opened the display would read “LINT dOOR” with no audio indication and the dryer will shut down. Once the lint door was closed the display would read “PRESS START” press the “ENTER/START” I key and it will continue the programmed cycle.

10.TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE - This routine monitors the tumbler (basket) temperature. When the temperature sensor or fuse opens with the machine not active the display will read “TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE” with an audio indication. If the machine was active at the time that the temperature sensor or fuse opened the display would read “TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE.” If the tumbler (basket) temperature is above 100º F (38º C) the machine will continue to display “TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE” with an audio indication and run with no heat for three (3) minutes or until the temperature drops below 100º F (38º C). If the tumbler (basket) temperature is below 100º F (38º C) upon failure the machine will shut down and display “TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE” with an audio indication. The display will continue to read “TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE” an audio indication will sound for approximately 5 seconds, every 30 seconds until the problem is corrected or the power to the dryer is disconnected (and the problem is corrected).

NOTE: Once the Phase 6 microprocessor controller (computer) detects a problem in the heat circuit, it updates every 30 seconds, so that if the problem was a loose connection in the circuit which corrected itself, the “TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE” condition would automatically be cancelled and the display will return to “REAdY.”

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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 AdjustmentsElectrical and GAS Requirements Installation RequirementsENCLOSURE, AIR SUPPLY, and Exhaust Requirements Operational Service Check Procedure Gas 10.5 inches water column 26.1 mb Control BOX Description of PartsControl Panel Microprocessor Control Panel NON-MICROPROCESSORDrive Motor GAS Burner AssemblyHSI HOT Surface Ignition Module Gas Models onlyTumbler Basket Bearing and Pulley Arrangement Idler AssemblyBlower Motor and Impellor GAS and Steam Tumbler Basket Main Door SwitchSail Switch Gas Models only Lint Drawer Automatic Reset ThermostatHI-LIMIT Gas Models only Compressed AIR Requirements Lint Drawer SwitchTemperature Sensor Bracket NON-COMPUTER Steam Damper SystemTo Replace Computer ServicingIntroduction Computer ControlsTo Replace Microprocessor Temperature Sensor Probe To Replace Keyboard Touchpad Label AssemblyTo Replace Gas Valve Refer to above burner illustration To Remove Flame Probe AssemblyIgnition Controls To Replace Main Burner Orifices To Test and Adjust Gas Water Column PressureTo Replace Burner Tubes To Convert from Natural Gas to L.P. GasTo Replace Burner Hi-Limit Thermostat Gas Models Only To Replace HSI Hot Surface Ignition ModuleThermostats 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 GlassTo Replace Tumbler Basket Pulley To Replace Main Door Hinge BlocksPulleys To Replace Large Idler Pulley To Replace Small Idler PulleyTo Replace Motor Pulley Tumbler Basket AssemblyTumbler Basket Alignment Vertical Up and Down Adjustment 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 BearingBelts Refer to illustrations in section F Pulleys Belt Tension Adjustment Tumbler Basket to IdlerTo Replace Rear Idler Shaft Pillow Block Bearing To Replace Drive Motor Belt Tension Adjustment Motor to IdlerTo Replace V-Belts MotorsImpellor 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 No Heat Display is reading Sail Switch FailDisplay is reading Drum Safety Fail Display is reading Burner Safety FailDisplay is reading Lint Door Display is reading Burner Control FailureDisplay is reading Burner Flame Failure Display is reading Main DoorThermal overload for drive motor is tripping Display is reading HotDryer operates but is taking too long to dry 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 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 Drum Tumbler Basket HI-LIMIT Input L.E.D. Indicator Fuse Main Fuse Input L.E.D. IndicatorLint Lint Door Input L.E.D. Indicator Main Main Door 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 only Ignition Attempt Failure GAS Models only Power 24 VAC is not Evident AT GAS ValveGAS/ELECTRIC only BURNER/OVEN Open HI-LIMIT Circuit 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