Troubleshooting | American Dryer Corp ML-145, ML-170 guide

SECTION VI

TROUBLESHOOTING

IMPORTANT: YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY and THE GAS SUPPLY or THE STEAM SUPPLY BEFORE ANY COVERS or

GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING, ADJUSTING, INSTALLATION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational Safety and Health Administration)

STANDARDS.

The information provided will help isolate the most probable component(s) associated with the difficulty described. The experienced technician realizes, however, that a loose connection or broken/shorted wire may be at fault where electrical components are concerned...and not necessarily the suspected component itself.

IMPORTANT: When replacing blown fuses, the replacement must be of the exact rating as the fuse being replaced. The information provided should not be misconstrued as a handbook for use by an untrained person in making repairs.

WARNING: ALL SERVICE and TROUBLESHOOTING SHOULD BE PERFORMED BY A QUALIFIED PROFESSIONAL or SERVICE AGENCY.

WARNING: WHILE MAKING REPAIRS, OBSERVE ALL SAFETY PRECAUTIONS DISPLAYED ON THE DRYER or SPECIFIED IN THIS MANUAL.

A.No L.E.D. (light emitting diode) display on microprocessor controller (computer)...

1.Open circuit breaker switch or blown fuse.

2.Tripped overload on the blower MTR.

3.Faulty wiring connection.

4.Faulty 24 V transformer.

5.“EMERGENCY STOP” (E-Stop) button is depressed.

6.Faulty microprocessor controller (computer).

B.Computer will not accept keyboard (touchpad) entries...

1.Keyboard (touchpad) ribbon is not plugged into computer securely.

2.Keyboard (touchpad) is defective.

3.Faulty microprocessor controller (computer).

35

Image 39

American Dryer Corp ML-145, ML-170 service manual Troubleshooting, Computer will not accept keyboard touchpad entries

Contents

American Dryer Corporation ML-145 / ML-170 Retain This Manual In a Safe Place For Future Reference For Your Safety Page Table of Content Section Technical Information Important Information Safety Precautions Standards Cleaning Routine Maintenance Lubrication Adjustments Installation Requirements ENCLOSURE, AIR SUPPLY, and Exhaust RequirementsElectrical and GAS Requirements Operational Service Check Procedure Gas 10.5 inches water column 26.1 mb Control BOX Description of PartsControl Panel Microprocessor Control Panel NON-MICROPROCESSOR Drive Motor GAS Burner AssemblyHSI HOT Surface Ignition Module Gas Models only Idler 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 Compressed AIR Requirements Lint Drawer SwitchTemperature Sensor Bracket NON-COMPUTER Steam Damper System To Replace Computer ServicingIntroduction Computer Controls To Replace Microprocessor Temperature Sensor Probe To Replace Keyboard Touchpad Label Assembly To Remove Flame Probe Assembly Ignition ControlsTo Replace Gas Valve Refer to above burner illustration To Replace Main Burner Orifices To Test and Adjust Gas Water Column Pressure To Replace Burner Tubes To Convert from Natural Gas to L.P. Gas To Replace HSI Hot Surface Ignition Module ThermostatsTo Replace Burner Hi-Limit Thermostat Gas Models Only To Replace Sail Switch Sail Switch Assembly Gas Models only To Replace Main Door Assembly To Adjust Sail Switch To Replace Front Panel To Install New Main Door Glass To Replace Main Door Hinge Blocks PulleysTo Replace Tumbler Basket Pulley To Replace Large Idler Pulley To Replace Small Idler Pulley Tumbler Basket Assembly Tumbler Basket Alignment Vertical Up and Down AdjustmentTo Replace Motor Pulley To Replace Tumbler Basket or Tumbler Basket Support Tumbler Basket Alignment Lateral Side to Side Adjustment Important Never strike the shaft directly with a hammer To Replace Front Idler Shaft Pillow Block Bearing To Replace Front Tumbler Basket Support Pillow Block Bearing Belt Tension Adjustment Tumbler Basket to Idler To Replace Rear Idler Shaft Pillow Block BearingBelts Refer to illustrations in section F Pulleys To Replace Drive Motor Belt Tension Adjustment Motor to IdlerTo Replace V-Belts Motors Impellor To Replace Lint Drawer Switch Lint Drawer Assembly To Replace Lint Screen Computer will not accept keyboard touchpad entries Troubleshooting Display is reading no Airflow Display is reading Rotation Sensor Fail Display is reading No Heat Display is reading Sail Switch FailDisplay is reading Drum Safety Fail Display is reading Burner Safety Fail Display is reading Lint Door Display is reading Burner Control FailureDisplay is reading Burner Flame Failure Display is reading Main Door Display is reading Hot Dryer operates but is taking too long to dryThermal overload for drive motor is tripping There is excessive vibration coming from the tumbler basket Overload for impellor fan motor is tripping Electrical 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 Indicators E.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 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. Indicator Power Supply Input L.E.D. Indicator Flame bURNER Control Fail Input L.E.D. Indicator E.D. Display Operating Status D. DISPLAY/CODES Phase 6 OPL Microprocessor L.E.D. Displays ALL REV E.D. Codes 1. Display Codes GAS 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 Steam Models No Heat Drive and Blower Motors Run Gas Models Door Condition Motor Plate High and LOW Voltage Technical Information Information on the Data Label Data Label How to Use a Manometer Using a Manometer ML-170 Tool List ADC 450429 1- 02/18/00-25