American Dryer Corp. Phase 6 Microprocessor Controls ML-190HS Manuel de service

ML-190HSService ManualPhase 6Microprocessor Controls112999SL/tcosta ADC Part No. 450410American Dryer Corporation88 Currant RoadFall River, MA 02720-4

6 90 DAYSRemove lint from tumbler (basket), drive motors, and surrounding areas. Remove lint from gas valve burner areawith a dusting brush or vacuum

7SECTION IIIINSTALLATION REQUIREMENTSInstallation should be performed by competent technicians in accordance with local and state codes. In theabsenc

8IMPORTANT: Failure to comply with these codes or ordinances and/or the requirements stipulatedin this manual can result in personal injury or compone

9NOTE: Water column pressure requirements (measured at the pressure tap on the gas valve body):Natural Gas - 3.5 Inches Water Column.L.P. Gas - 10.5 I

10SECTION IVDESCRIPTION OF PARTSA. CONTROL PANEL (MICROPROCESSOR)Lifting the control door will reveal the controlpanel assembly. Opening the control

11D. GAS BURNER ASSEMBLYGas-heated dryers are equipped with agas burner assembly consisting of four (4)burner tubes, gas valve, HSI (Hot SurfaceIgnit

12G. SPEED REDUCING SHAFT(Viewing from the front of the dryer). Thespeed reducing shaft is located on the rightside and is right above the drive mot

13J. MAIN DOOR SWITCHThe main door switch is located near the main door hinge. When the main dooropens, the switch will also open, preventing the dr

14M. MANUAL RESET THERMOSTATThis is located inside the dryer in the lint compartmentabove the lint drawer. This thermostat senses theheated air afte

15P. STEAM DAMPER SYSTEMThe newest type system is called thesteam damper. It is shown to theright and it uses a piston withcompressed air to open an

Retain This Manual In A Safe Place For Future ReferenceAmerican Dryer Corporation products embody advanced concepts in engineering, design, and safety

16SECTION VSERVICINGINTRODUCTIONALL electrical/mechanical service or repairs should be made with the electrical power to the dryer disconnected(power

17A. COMPUTER CONTROLSTo Replace Computer1. Disconnect electrical power to the dryer.2. Disconnect main power harness along with the three (3) other

18To Replace Microprocessor Temperature Sensor Probe1. Discontinue electrical power to the dryer.2. Remove lint drawer. Remove six (6) screws securin

194. Reverse procedure for installation of new flame sensor probe.To Replace Gas Valve (Refer to burner illustration on page 21)1. Discontinue electri

201. To Test Gas Water Column (W.C.) Pressure:a. Connect water column test gauge connection to gasvalve pressure tap (1/8 NPT). This pressure tap is

21To Replace Burner Tubes1. Refer to Replace Gas Valve andfollow Step #1 through Step #6.2. Remove four (4) screws securingmanifold rest and remove

22IMPORTANT: UNDER NO CIRCUMSTANCES shouldheat circuit safety devices ever be disabled.1. Discontinue electrical power to the dryer.2. Disconnect wire

23D. SAIL SWITCH ASSEMBLY (GAS MODELS ONLY)The sail switch is a heat circuit safety device which controls the burner circuit only. When the dryer is

247. Reestablish electrical power to the dryer.IMPORTANT: UNDER NO CIRCUMSTANCES should the door switch be disabled.To Replace Main Door Assembly1. Re

256. Unplug the door switch wires at the bottom of the front panel.7. Disconnect the wires connecting the EMERGENCY STOP (E-Stop). The easiest plac

IMPORTANTYOU MUST DISCONNECT and LOCKOUT THE ELECTRICSUPPLY and THE GAS SUPPLY or THE STEAM SUPPLY BEFORE ANYCOVERS or GUARDS ARE REMOVED FROM THE MAC

2611. Tighten cap screws progressively. There should remain a gap between the sheave hub and the flange of thebushing.IMPORTANT: Tighten screws evenl

275. Loosen V-belts, then rotate pulley and roll V-belts out ofits grooves.6. Remove cap screws.7. Insert cap screws in tapped removal holes and tigh

28IMPORTANT: Tighten screws evenly and progressively. Never allow the sheave to be drawn incontact with the flange of the bushing. This gap should m

29H. BEARINGSTo Replace Rear Drive Shaft Pillow Block Bearing1. Follow Step #1 through Step #6 from To Replace Front Drive Shaft Bearing.2. Remove

3011. Reestablish electrical power to the dryer.To Replace Rear Tumbler (Basket) Support Flange Bearing1. Discontinue electrical power to the dryer.2.

31NOTE: Check belt adjustment and readjust if necessary.8. Remove wheel from shaft.9. Loosen the two (2) set screws in the race of the pillow block be

325. Replace by reversing procedure.6. Reestablish electrical power to the dryer.I. BASKET and SUPPORTTo Replace Tumbler (Basket) and Tumbler (Basket

33V-Belt Tension Adjustment (Drive Shaft to Speed Reducing Shaft)1. Discontinue electrical power to the dryer.2. Remove the lint drawer.3. Remove the

34K. MOTORSTo Replace Drive Motor1. Discontinue electrical power to the dryer.2. Remove the lint drawer.3. Remove the lint door.4. Remove the left li

352. Follow Step #4 and Step #5 under To Replace Impellor.3. Loosen the four (4) bolts securing the fan shaft assembly to the base of the dryer.NOTE

IMPORTANTPLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on theequipment and specified in the installation and operator's manual includedwith the

36To Replace Lint Drawer Switch1. Disconnect electrical power to the dryer.2. Remove lint drawer and lint door.3. Disconnect both 4-pin connectors at

37SECTION VITROUBLESHOOTINGIMPORTANT: YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY andTHE GAS SUPPLY or THE STEAM SUPPLY BEFORE ANY COVERS orGU

38C. Dryer will not start, but computer display indicators are on and relay output lights are on...1. Failed contactors.2. Failed arc suppressor (A.S.

396. Faulty gas valve.7. No voltage to gas valve.8. Poor airflow due to restriction in exhaust or dirty lint screen.H. Dryer operates but is taking to

40K. Dryer is tripping the burner hi-limit safety thermostat...1. Insufficient exhaust duct work...size or restriction in exhaust system.2. Insufficie

41SECTION VIIELECTRICAL TROUBLESHOOTINGThe information provided will help isolate the most probable components associated with the difficulty describe

42SECTION VIIIPHASE 6 OPL SYSTEM DIAGNOSTICSIMPORTANT: YOU MUST DISCONNECT and LOCKOUT ELECTRIC, GAS, or STEAMSUPPLY BEFORE ANY COVERS or GUARDS ARE R

437. bURNER FLAME FAIL - this routine allows two (2) Flame Out retries to occur before proceedinginto the error. The count of two (2) will be establi

44NOTE: RPM - This routine monitors the timing response from the existing rotational sensor input andderives a RPM measurement. To display this RPM m

45C. PHASE 6 OPL MICROPROCESSOR CONTROLLER RELAY OUTPUT L.E.D. (light emitting diode) INDICATORSThere are a series of five (5) L.E.D. (light emi

Table of ContentsSECTION IIMPORTANT INFORMATION ... 3A. Safety Precautions

46SECTION IXL.E.D. DISPLAY/CODESThe L.E.D. (light emitting diode) display informs the operator of cycle status, program verification, and displaysimpo

471) Illustration No. 1a) FORWARD INDICATOR - this indicator dot is functional for dryer models with theReversing Action Option ONLY. This indicator

48C. L.E.D. CODES1. Display CodesA SLOPE FACTORALL REV ALWAYS REVERSINGANTI WRINKL dELAY TIME ANTI-WRINKLE DELAY TIMEANTI WRINKL GUARd ACTIVE ANTI-W

49D. COMPUTER LOGIC and WIRING DIAGRAM1. Operator enters desired selection(s).2. Information entered is sent to the microcontroller via the keyboard

50A. No Display Condition...1. Check main fuses or circuit breaker.2. Check blower motor overload...If tripped, reset.3. Check fuse 1 or fuse 2 and if

51If there is voltage, replace the coil or the complete contactor.If there is no voltage, check for voltage across the two (2) BS3 terminals on the ar

52If no voltage is present, check voltage at pin 5 and 8 of the J2 connector. Which is located in the frontelectrical box. If voltage is present the

53I. Microprocessor reads Temp Sensor Fuse.NOTE: Before continuing with this section check the .125 MA fuse on the computer board.1. Replace the tem

54ºF =9(ºC + 32)5ºC =5(ºF - 32)9TEMPERATURE SENSOR CURRENT=ºC + ºK (273.15)=MICROAMPS (µA)1,000,000

55SECTION XTECHNICAL INFORMATIONThe following section contains various technical information important to the service person in servicing andmaintaini

SECTION VSERVICING ... 16A. Computer Contro

56B. DATA LABELContacting American Dryer Corporation (ADC)When contacting ADC, certain information is required to insure proper service/parts informa

57C. USING A MANOMETERHow To Use A Manometer1. With dryer in non-operating mode, remove plug on the gas valve pressure tap.2. Attach plastic tubing t

58D. TOOL LISTStraight Head ScrewdriverPhillips Head ScrewdriverSensor Pin and Socket Tool (P/N 122801)Pliers1/4 Nut Driver3/8 Open End Wrench5/8

ADC 450410 1-02/22/00-25

3SECTION IIMPORTANT INFORMATIONA. SAFETY PRECAUTIONS1. DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity of this or

48. Articles should never be left unattended for an extended period of time in the tumbler (basket) aftercompletion of the drying and cooling cycles.

5SECTION IIROUTINE MAINTENANCEA. CLEANINGA program and/or schedule should be established for periodic inspection, cleaning, and removal of lint fromv