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

122999SL/tcosta ADC Part No. 450429

ML-145 / ML-170

Service Manual

Phase 6 Microprocessor Controls

and

Timer Controls

American Dryer Corporation

88 Currant Road

Fall River, MA 02720-4781

Telephone: (508) 678-9000 / Fax: (508) 678-9447

e-mail: techsupport@amdry.com

Contents

Main Retain This Manual In A Safe Place For Future Reference Important ML-145 / ML-170 Page Page Table of Content Page SECTION I IMPORTANT INFORMATION A. SAFETY PRECAUTIONS Page SECTION II ROUTINE MAINTENANCE A. CLEANING B. ADJUSTMENTS C. LUBRICATION SECTION III INSTALLATION REQUIREMENTS A. ENCLOSURE, AIR SUPPLY, and EXHAUST REQUIREMENTS B. ELECTRICAL and GAS REQUIREMENTS C. OPERATIONAL SERVICE CHECK PROCEDURE Page SECTION IV DESCRIPTION OF PARTS A. CONTROL PANEL (MICROPROCESSOR) B. CONTROL PANEL (NON-MICROPROCESSOR) C. CONTROL BOX D. HSI (HOT SURFACE IGNITION) MODULE (Gas Models ONLY) E. GAS BURNER ASSEMBLY F. DRIVE MOTOR G. BLOWER MOTOR and IMPELLOR (GAS and STEAM) H. IDLER ASSEMBLY I. TUMBLER (BASKET) BEARING and PULLEY ARRANGEMENT J. TUMBLER (BASKET) K. MAIN DOOR SWITCH L. SAIL SWITCH (Gas Models ONLY) M. HI-LIMIT (Gas Models ONLY) N. AUTOMATIC RESET THERMOSTAT O. LINT DRAWER Page SECTION V SERVICING INTRODUCTION WARNING: PERSONAL INJURY COULD RESULT. A. COMPUTER CONTROLS To Replace Computer To Replace Keyboard (Touchpad) Label Assembly To Replace Microprocessor Temperature Sensor Probe NOTE: DO NOT remove screws. Page To Replace Main Burner Orifices To Test and Adjust Gas (Water Column) Pressure To Convert from Natural Gas to L.P. Gas To Replace Burner Tubes To Replace HSI (Hot Surface Ignition) Module C. THERMOSTATS To Replace Burner Hi-Limit Thermostat (Gas Models Only) IMPORTANT: UNDER NO CIRCUMSTANCES should heat circuit safety devices ever be disabled. To Replace Lint Compartment Hi-Heat Protector (225 F [107 C]) Thermostat IMPORTANT: UNDER NO CIRCUMSTANCES should heat safety devices be disabled. NOTE: DO NOT remove the screws. D. SAIL SWITCH ASSEMBLY (Gas Models ONLY) To Replace Sail Switch To Adjust Sail Switch E. FRONT PANEL and MAIN DOOR ASSEMBLIES To Replace Main Door Switch IMPORTANT:UNDER NO CIRCUMSTANCES should the door switch be disabled. To Replace Main Door Assembly To Install New Main Door Glass To Replace Front Panel To Replace Main Door Hinge Blocks F. PULLEYS To Replace Tumbler (Basket) Pulley To Replace Small Idler Pulley To Replace Large Idler Pulley To Replace Motor Pulley G. TUMBLER (BASKET) ASSEMBLY Tumbler (Basket) Alignment (Vertical) (Up and Down Adjustment) Tumbler (Basket) Alignment (Lateral) (Side to Side Adjustment) To Replace Tumbler (Basket) or Tumbler (Basket) Support IMPORTANT: Never strike the shaft directly with a hammer. To Replace Front Tumbler (Basket) Support Pillow Block Bearing To Replace Front Idler Shaft Pillow Block Bearing To Replace Rear Idler Shaft Pillow Block Bearing I. V-BELTS (Refer to illustrations in section F Pulleys) NOTE: Belts must always be replaced in pairs (matched sets). V-Belt Tension Adjustment (Tumbler [Basket] to Idler) V-Belt Tension Adjustment (Motor to Idler) To Replace V-Belts NOTE: Always replace V-belts in pairs. J. MOTORS To Replace Drive Motor To Replace Impellor Motor (Fan Shaft Drive - Gas and Steam Models 50 & 60 Hz) K. IMPELLOR Page SECTION VI TROUBLESHOOTING C. Display is reading Rotation Sensor Fail. D. Display is reading NO Airflow. E. Display is reading Sail Switch Fail. F. Display is reading Drum Safety Fail G. Display is reading Burner Safety Fail. H. Display is reading No Heat. Page N. Display is reading Hot. O. Dryer operates but is taking too long to dry... P. Thermal overload for drive motor is tripping... Page SECTION VII ELECTRICAL TROUBLESHOOTING SECTION VIII PHASE 6 OPL SYSTEM DIAGNOSTICS A. DIAGNOSTIC (L.E.D. [light emitting diode] DISPLAY) FAILURE CODES Page B. L.E.D. (light emitting diode) DISPLAY INDICATORS Page 1. FAN (BLOWER) Output L.E.D. (light emitting diode) Indicator 2. FOR (FORWARD) Output L.E.D. Indicator (for Optional Reversing Model ONLY) 3. REV (REVERSE) Output L.E.D. Indicator (for Optional Reversing Models ONLY) 4. AIR (AIR JET) Output L.E.D. Indicator - OPTIONAL 5. HT1 (HEAT) Output L.E.D. Indicator 6. FUSE (MAIN FUSE) Input L.E.D. Indicator 7. LINT (LINT DOOR) Input L.E.D. Indicator 8. MAIN (MAIN DOOR) Input L.E.D. Indicator 9. DRUM (TUMBLER [BASKET] HI-LIMIT) Input L.E.D. Indicator 10. SAIL (SAIL SWITCH) Input L.E.D. Indicator Page SECTION IX L.E.D. DISPLAY/CODES A. L.E.D. DISPLAY OPERATING STATUS NOTE: Refer to the illustration on the following page for details. B. PHASE 6 OPL MICROPROCESSOR L.E.D. DISPLAYS C. L.E.D. CODES 1. Display Codes Page D. COMPUTER LOGIC and WIRING DIAGRAM Page C. Drive motor works in forward mode but does not reverse, blower motor runs... D. Blower motor does not operate, drive motor runs... E. No Heat Drive and Blower Motors Run (Gas Models)... F. No Heat Drive and Blower Motors Run (Steam Models)... Page SECTION X TECHNICAL INFORMATION A. MOTOR PLATE (HIGH and LOW VOLTAGE) B. DATA LABEL Information on the Data Label C. USING A MANOMETER How to Use a Manometer NOTE: Place manometer in a position so that readings can be taken at eye level. D. ML-170 TOOL LIST