American Dryer Corp. AD-200 manuale d’uso

ADC Part No. 450310 American Dryer Corporation 88 Currant Road Fall River , MA 02720-4781 T elephone: (508) 678-9000 / Fax: (508) 678-9447 e-mail: techsupport@amdry .com 062599DMG/cms AD-200 Service Manual with Non-Tilt Options 1993 thru 1998[...]

Retain This Manual In A Safe Place For Future Reference American Dryer Corporation products embody advanced concepts in engineering, design, and safety . If this product is properly maintained, it will provide many years of safe, efficient, and trouble-free operation. ONLY properly licensed technicians should service this equipment. OBSER VE ALL SA[...]

IMPOR T ANT YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPL Y and THE GAS SUPPL Y or THE STEAM SUPPL Y BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING, ADJUSTING, INST ALLA TION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational Safety and Health Administration) ST ANDARDS. W ARNING The dryer must never be [...]

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE V APOR AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE . FOR YOUR SAFETY DO NOT DR Y MOP HEADS IN THE DR YER. DO NOT USE DR YER IN THE PRESENCE OF DR Y CLEANING FUMES. IMPOR T ANT PLEASE OBSER VE ALL SAFETY PRECAUTIONS displayed on the equipment and/or specified in the installation/operator[...]

T able of Contents SECTION I SAFETY PRECAUTIONS .......................................................................................... 2 SECTION II ROUTINE MAINTENANCE ...................................................................................... 4 SECTION III SPECIFICA TIONS and DIMENSIONS ..............................................[...]

2 SECTION I SAFETY PRECAUTIONS CAUTION: The dryer should never be left unattended while in operation. W ARNING: For your safety , the information in this manual must be followed to minimize the risk of fire or explosion or to prevent property damage, personal injury , or loss of life. W ARNING: The dryer must never be operated with any of the back [...]

3 W ARNING: DO NOT dry mop heads. Contamination by wax or flammable solvent will create a fire hazard. W ARNING: DO NOT use heat for drying articles that contain plastic, foam, sponge rubber , or similarly textured rubberlike materials. Drying in a heated basket (tumbler) may damage plastics or rubber and also may be a fire hazard. 7. A program sho[...]

4 SECTION II ROUTINE MAINTENANCE A. CLEANING A pro gram and/or schedule should be established for periodic inspection, cleaning, and removal of lint from various areas of the dryer , as well as throughout the duct work system. The frequency of cleaning can best be determined from experience at each location. Maximum operating efficiency is dependen[...]

5 W ARNING: TO A VOID THE HAZARD OF ELECTRICAL SHOCK, DISCONTINUE ELECTRICAL SUPPL Y T O THE DR YER. MONTHL Y Empty the compressed air filter bowl. Clean any lint accumulation from the gas valve/burner area at the top of the dryer , the fan (impellor) motor , and the fan (impellor) bearings located in the dryer base. EVERY 6 MONTHS STEAM MODELS - c[...]

6 B. LUBRICA TION MONTHL Y Check compressed air filter bowl for water . Empty by pressing the rubber petcock to the side. Additionally , check lubricator bowl for oil. If empty , remove the fill plug and add oil. (Use petroleum based 10/150 SSU misting oi l.) Replace fill plug. NOTE: LUBRICA T OR SHOULD BE SET A T 1 DROP PER CYCLE . NOTE: REGULA TO[...]

7 C. ADJUSTMENTS 7 DA YS AFTER INST ALLA TION and EVERY 6 MONTHS THEREAFTER Inspect bolts, nuts, screws, (bearing set screws), nonpermanent gas connections (i.e., unions, shut-off valves, orifices), and grounding connections. Fan (impellor) V-belts, along with the motor and drive belts should be examined and replaced if necessary . T ighten loose V[...]

8 SECTION III SPECIFICA TIONS and DIMENSIONS A. SPECIFICA TIONS (Gas and S team Models) NOTE: ADC reserves the right to make changes in specifications at any time, without notice or obligation. Gas* Steam* M AXIMUM C APACITY ( DRY WEIGHT )2 0 0 l b s . 90 . 9 k g B ASKE T ( TUMBLER ) D IAMETER 62-1/ 2" 158 .75 cm B ASKE T ( TUMBLER ) D EPTH 42[...]

9 SECTION IV INST ALLA TION REQUIREMENTS Installation should be performed by competent technicians in accordance with local and state codes. In the absence of these codes, installation must conform to applicable AMERICAN NA TIONAL ST ANDARDS: National Fuel Gas Code ANSI Z223.1-LA TEST EDI T IO N or National Electric Code ANSI/NFP A No. 70-LA TEST E[...]

10 B. Electrical and Gas Requirements It is your responsibility to have ALL electrical connections made by a properly licensed and competent electrician to assure that the electrical installation is adequate and conforms with local and state regulations or codes. In the absence of such codes, ALL electrical connections, material, and workmanship mu[...]

11 SECTION V COMPONENT DESCRIPTION A. Heat Section The AD-200 dryer uses three (3) types of heat sources: natural gas, liquid propane (L.P .) gas, and steam. Natural gas and L.P . gas are not directly replaceable. The gas valves need to be modified to use other than the type of heat specified on the nameplate. 1. ADG-200 (gas) dryers utilizes a Dir[...]

12 a . The Direct Spark Ignition (DSI) Module is a 24 V AC device designed to be the "controller" of the DSI system. When activated by the dryer controls, this module constantly monitors and controls the functions of the DSI system (i.e., spark activation, gas valve off/on, flame verification, etc.). Additionally , the DSI Module has self[...]

13 e. The T umbler Hi-Limit Switch is a thermostat type switch located above the Lint Basket. Its function is to discontinue heat (flame) in the event of an over temperature situation (above 225º F). 225º F Thermostat MAN3484 f . The gas valve used in the ADG-200 is of the redundant type which means that the gas valve is actually two gas valves i[...]

14 i. ADC Direct Spark Ignition (DSI) Operation Flow Chart[...]

15 B. T r oubleshooting The Dir ect Spark Ignition (DSI) System NOTE: The troubleshooting information provided in this manual is intended for use by qualified service technicians only . OBSER VE ALL SAFETY PRECAUTIONS displayed on the equipment or specified in the AD-200 Non-T ilting Installation/Operator's Manual ( ADC Part No. 1 12142) inclu[...]

16 1. Direct Spark Ignition (DSI) T roubleshooting T erms (definitions) a . DSI MODULE "RED" L.E.D. INDICA TOR LIGHT - this "red" L.E.D. (liquid emitting diode) light is located in the upper right corner of the DSI module (refer to the top illustration on page 12 ). This is a diagnostic indicator that simplifies the operational [...]

17 If the dryer repeatedly has DSI module "LOCK-OUT" failures, the cause may be due to high voltage not getting into the DSI module probe circuit. (1) Check to insur e that the r ed high voltage wir e (between the ignitor spark electrode and the DSI module) is not wrapped around the sensor probe wire (the wire between the DSI module FP te[...]

18 c . Three V isual Checks 1) Does the DSI ignitor/flame-probe assembly start sparking? If not, refer to the FIRST VISUAL CHECK on page 19 . 2) Does the main burner ignite? If not, refer to the SECOND VISUAL CHECK on page 20 . 3) Does the main burner remain lit after ignition has been established ("FLAME-OUT")? If not, refer to the THIRD[...]

19 )LUVW9LVXDO&KHFN d. T roubleshooting Flow Chart - Quick Reference...[...]

20 6HFRQG9LVXDO&KHFN e . T roubleshooting Flow Chart - Quick Reference...[...]

21 f . T roubleshooting Flow Chart - Quick Reference... 7KLUG9LVXDO&KHFN[...]

22 2. T roubleshooting/System Detailed Diagnosis When the dryer calls for heat, 24 V AC from the step down transformer is applied to the "TH" and "GND" terminals of the DSI module. The DSI module L.E.D. (light emitting diode) indicator will light "red" (for up to approximately 1.5 seconds [prepurge]) then the L.E.D. in[...]

23 (1) The GAP on the ignitor and flame-probe assembly must be set, and held at 1/8" +/- 1/32" (.1250 +/- .03121). If this GAP is not maintained (if the GAP is either to large or to small), the DSI module will indicate a system malfunction and go into the "LOCK-OUT" mode (the L.E.D. will LIGHT "RED" CONTINUOUSL Y). a )[...]

24 NOTE : T o reset the DSI module if it is in the "LOCK-OUT" mode, open and close the main door , then restart the dryer . (a ) T o check or set the 1/8" GAP , use a DSI Gap Feeler Gauge or similar device to determine GAP size. DO NOT USE FEELER T O SET THE GAP , use it only to determine the size of the gap. If an adjustment is nece[...]

25 3) Air T urbulence If there is sail switch flutter due to air turbulence or improper impellor (fan and blower) rotation or a restriction in the exhaust duct work, the DSI module will cycle erratically . This in turn might cause the DSI module to "LOCK-OUT" (where the L.E.D. indicator will LIGHT "RED" CONTINUOUSL Y). a ) If ai[...]

26 6) Direct Spark Ignition (DSI) 24 V AC T ransformer The DSI transformer is designed to step down the operating voltage of the dryer to 24 V AC to operate the DSI module. This transformer , like ALL transformers is two (2) sided; a ) Primary Side... This is the incoming voltage side - 208 V AC, 230/240 V AC, 380 V AC, 416 V AC, 480 V AC - of the [...]

27 C. Natural Gas T o L.P . (Liquid Pr opane) Gas Conversion Instructions IMPOR T ANT : CONVERSION MUST BE PERFORMED BY COMPETENT TECHNICIANS IN ACCORDANCE WITH LOCAL and ST A TE CODES. NOTE: Converting the dryer to L.P . Gas disables the internal regulator of the gas valve, there- fore, an external regulator must be provided at the source of the L[...]

28 12 . Reestablish electrical service to the dryer . a . T est ALL connections for leaks. IMPOR T ANT : T est ALL connections for leaks by brushing on a soapy water solution (liquid detergent works well). W ARNING: NEVER TEST FOR LEAKS WITH A FLAME! 13 . Operate the dryer through one (1) complete cycle to insure proper operation.[...]

29 D. Steam Coil System Operation General Overview The ADS-200 steam coil is constantly charged thereby eliminating repeated expansion and contraction and also provide instant heating to start the drying process. The steam damper , located on top of the steam coil, is the only temperature controlling device in this system. When the steam damper is [...]

30 2. Steam Damper Actuator System The steam damper actuator system consists of a hinged damper plate, pneumatic piston, and a 24 volt solenoid valve with a needle valve to control the speed of the piston actuation. On a call for heat, a 24 volt signal is applied to the 3-way/2-position solenoid valve. This signal switches the valve so that compres[...]

31 2. Steam Damper Actuator System Service and Replacement a . Steam Damper Cylinder/Piston Replacement 1) Disconnect compressed air supply from the dryer . 2) Disconnect tubing from the piston. 3) Remove the spring clip from clevis pin then slide out the clevis pin. 4) Remove the steam damper cylinder (piston). 5) T o install new steam damper cyli[...]

32 d. Steam Coil Replacement 1) Discontinue electric service to the dryer . 2) Disconnect compressed air supply from the dryer . 3) Shut off ALL steam supply lines and steam return valves that feed the steam coil. 4) W ait a sufficient amount of time until ALL of the steam lines and the steam coil is cool. 5) Open 1/2" plug on the return line [...]

33 13 ) Hoist the new steam coil into place and bolt down. 14 ) Replace ALL of the panels removed in Step #10 . 15 ) Reinstall ALL of the piping removed from the old steam coil in Step #9 . NOTE: Thread sealant certified for steam piping must be applied to the threads. 16 ) Reconnect ALL of the piping (supply lines and return lines) disconnected in[...]

34 E. Sprinkler System Description The AD-200 sprinkler system is monitored by a microprocessor based temperature controller as a designated " F AIL-SAFE ." The microprocessor circuit must have power in order to engage main power to the dryer . When cycling the dryer , if the temperature at the Resistive T emperature Device (R TD) reaches[...]

35 d) Sprinkler Digital T emperature Controller The sprinkler digital temperature controller is a programmable microprocessor used to monitor temperatures via a Resistive T emperature Device (R TD). MAN3488 NOTE: Operating parameters are preset at the factory and should not require any adjustment. Master Relay - The coil in this relay must be energ[...]

36 3. Sprinkler System Component Replacement a . Resistive T emperature Device (R TD) Replacement 1) T urn the water supply to the dryer off. 2) Discontinue electric service to the dryer . 3) Remove the 1/4" compression fitting. 4) Remove the two (2) screws from the junction box. 5) Remove the wires of the R TD from the terminal strip. NOTE: I[...]

37 b. Sprinkler V alve Replacement 1) T urn the water supply to the dryer of f. 2) Discontinue electric service to the dryer . 3) Disconnect compressed air supply from the dryer . 4) Loosen and remove the hose clamp. 5) Remove any residual water to the valve. 6) Remove 1/4" air tubing going to the valve. 7) Remove the two (2) U-bolts holding t[...]

38 c . 3 HP Control Relay Replacement W ARNING: THE SPRINKLER CIRCUIT HAS A SEP ARA TE POWER SUPPL Y (then the power supply for the dryer). DISCONNECT and LOCK-OUT BOTH POWER SUPPLIES BEFORE SER VICING THE DR YER. 1) Mark and identify the wires that will be removed for proper reinstallation. 2) Press down on the control relay and lift the bottom ou[...]

39 MAN3169[...]

40 F. Air Jet Assembly 1. Air Jet Assembly Description The AD-200 air jet assembly is located in the left front base of the dryer . The air jet is designed to operate at the end of each cycle for thirty (30) seconds, to remove lint which may have accumulated on the blower (impellor) fan blades. This function will be interrupted if the main door or [...]

41 4 ) Remove the two (2) #10-16 x 1/2" Crimptite TEK screws. Remove the valve support. 5) Remove the two (2) #6-32 x 1" hex head machine bolts by removing the two (2) #6 hex nuts and the two (2) #6 star washers. 6) T o install new air jet assembly , reverse above procedure ( steps #5 through #1 ). b. Pneumatic V alve Muffler Replacement [...]

42 2. Component Replacement a ) Blower (impellor and fan) Motor Replacement 1) Discontinue electric service to the dryer . 2) Mark and identify the wires that will be removed for proper reinstallation. 3) Loosen the bolts from the motor to the motor base ... (a ) Slide the blower (fan and impellor) motor forward. (b) Remove the V-belts. (c ) Remove[...]

43 18 ) Replace the V-belts ... (a ) Adjust to proper tension by adjusting position of the new blower (fan/impellor) motor . (b) Align the V-belts. 19 ) T ighten/secure the new motor to the motor base. 2 0 ) Rewire the new blower (fan and impellor) motor in the same order as the wiring from the motor that was removed. A wiring diagram is usually af[...]

44 (e ) Loosen the set screws on the bushing. (f) Remove the bushing and the pulley . 1 1 ) Remove the shrouded pillow block bearing by removing the set screw . 12 ) Replace the shrouded pillow block bearing on to the fan shaft ... (a ) Secure the fan (blower) shaft bearing mount assembly . (b) T ighten the set screws in the shrouded pillow block b[...]

45 7) Remove the 1/4" x 1/4" x 1-3/4" key on the fan (impellor) shaft. (a ) Slide the squirrel cage fan (impellor) off of the shaft. NOTE: Install this 1/4" x 1/4" x 1-3/4" key on to the fan shaft before installing the new squirrel cage fan. 8) T o install new squirrel cage fan (impellor) , reverse above procedure ( st[...]

46 a ) Blower (impellor/fan) Controls and Overloads 1) Thermal Magnetic Starter (TMS) The thermal magnetic starter is used as a safety device to protect the motor from starting in a locked rotor condition. The overload has a dial setting on the face of the device. T o set the overload, refer to your specific electrical diagrams. The overload is spe[...]

47 2) Auxiliary Contact Block The Auxiliary Contact Block is mounted on the side of the overload. Its' function is to sense an over- load trip, thereby triggering a safety fault which will disable the drying cycle. A "DOOR" message will appear on the L.E.D. (light emitting diode) display on the Phase 5 microprocessor controller (comp[...]

48 G. Filter/Regulator Assembly The purpose of the filter is to remove bulk liquids and solid particles from the compressed air stream. The filter element provides mechanical separation of solids. Centrifugal force inside the filter bowl separates bulk liquids and larger solid particles. The filter consists of a louver which causes a centrifugal sp[...]

49 H. Door Systems The AD-200 utilizes two (2) styles of doors, which are Manual Doors and Pneumatic Automatic Doors. 1. Manual Door Description The Manual Doors run on a single aluminum track with a wheel assembly mounted above the doors and a channel with teflon strips mounted on the bottom of the doors ... a . For dryers manufactured as of Novem[...]

50 3 . Door Component Replacement/Removal a . Manual Door Replacement or Removal 1 ) Discontinue electric service to the dryer . 2) Remove the two (2) 1/4-20 x 1/2" bolts from each side of the middle guard and rear guard. 4) T o install new manual door(s) or to reinstall manual door(s), reverse above procedure (steps #3 through #1 ). a ) For d[...]

51 b. Pneumatic Automatic Door Replacement or Removal 1) Discontinue electric service to the dryer . 2) Remove the two (2) 1/4-20 x 1/2" bolts from each side of the middle guard and rear guard. 3) Remove the three (3) 1/4-20 x 3/4" bolts from the bottom guard. Remove the bottom guard. 4) Remove the two (2) 8-32 x 3/4" screws on each [...]

52 c . Cable Cylinder Replacement or Removal 1) Discontinue electric service to the dryer . 2) Remove the two (2) 1/4-20 x 1/2" bolts from each side of the middle guard. Remove the middle guard. 3) Disconnect the cables in the top of the electrical panel. 4) Remove the hardware from the top guard. Remove the top guard. 5) Remove the two (2) 8-[...]

53 e . Right Load Door Glass (Window) Replacement 1 ) Remove ALL of the old silicone from around the door glass. 2 ) Clean glass door opening (with alcohol) to remove ALL of the old silicone. 3) Carefully clean new door glass with alcohol prior to installation. 4) Apply a bead of silicone ( ADC Part No. 170730) to the outer perimeter of the door gl[...]

54 f . 4-W ay V alve and 3-W ay V alve/Supply Air Disable V alve Replacement 1) Discontinue electric service to the dryer . 2 ) Disconnect compressed air supply from the dryer . 3) Remove the 1/4-20 self-tapping screws securing the pneumatic panel cover . 4 ) Remove the two (2) 1/4-20 screws securing the junction box cover . 5) Loosen the cord grip[...]

55 I. Control Electrical System CAUTION: When servicing the HIGH V OL T AGE section of the dryer , the ELECTRIC SER VICE MUST BE DISABLED. THE " EMERGENCY ST OP" BUTT ON DOES NOT DISABLE THE HIGH V OL T AGE TO THE DR YER. 1. Control Electrical System Description a . 3-Phase (3ø) Electrical Power The 3-phase (3ø) electrical power for the[...]

56 3) 24 V AC T ransformer The 24 V AC transformer consists of fuse 1 (F1) and fuse 2 (F2) which is the primary fusing for the transformer . For the proper rating of these fuses refer to the specific electric diagram. The transformer is located in the right hand electrical cabinet. Dryer models with an optional Sprinkler System have an energizing s[...]

57 c ) Lint Drawer Closed circuit branch ... The lint drawer closed switch is located in the front of the dryer . When the lint drawer is closed, it closes the switch contacts, powering the lint drawer closed relay . Then, the dry enable relay will close, supplying 24 V AC to the Phase 5 microprocessor (computer) door signal. This sequence will occ[...]

58 SECTION VI BASIC TROUBLESHOOTING IMPOR T ANT : YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPL Y and THE GAS SUPPL Y BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING , ADJUSTING , INST ALLA TION, OR TESTING O F ANY EQUIPMENT PER OSHA (Occupational Safety and Health Administration) ST ANDARDS. The informati[...]

59 B. Drive motor is not operating (does not start)... * Microprocessor controller (computer) relay output indicator (either forward FWD or reverse REV) is on. 1. Blown drive motor contactor fuses or overloads. 2. Failed drive motor contactor . 3. Failed drive motor . * Microprocessor controller (computer) relay output indicator (neithe[...]

60 h. V oltage to the dryer is incorrect... check dryer data label for specified voltage. 2. Failed overload protector . E. Impellor (fan) motor is not operating (does not start)... "door" L.E.D. is on. * Microprocessor controller (computer) MTR relay output indicator is on. 1. Failed blower (impellor and fan) motor fuses or overloa[...]

61 2. Failed motors (both blower [fan/impellor] motor and drive motor). H. Both drive motor and blower (fan/impellor) motor are not operating... microprocessor controller (computer) L.E.D. (light emitting diode) motor indicator dots and the door L.E.D. indicator are on but the relay output L.E.D. indicators are off (microprocessor controller [...]

62 K. Microprocessor controller (computer) L.E.D. display reads door and the microprocessor controller (computer) DOOR L.E.D. (light emitting diode) indicator is on... 1. Failed microprocessor controller (computer). L. Microprocessor controller (computer) will not accept any keyboard [touchpad] entries, (i.e., L.E.D. [light emitting dio[...]

63 P. Dryer stops during a cycle, microprocessor controller (computer) buzzer (tone) sounds for a few seconds, and then microprocessor controller (computer) L.E.D. (light emitting diode) returns to FILL.. . 1. Loose connection somewhere in the main power circuit to the microprocessor controller (computer). Q. Microprocessor controller (comput[...]

64 4. Insufficient make-up air . 5. Poor air/gas mixture at burner - yellow or poor flame pattern... Burner orifices not aligned properly in burner tubes ( for GAS MODELS ONLY ) 6. Lint drawer/screen is not being cleaned on a regular basis or often enough. 7. Extractors (washer) not performing properly . 8. Sail switch is fluttering... restriction [...]

65 SECTION VII ELECTRICAL TROUBLESHOOTING 1. Microprocessor Display Power Circuit Theory of the Microprocessor Display Power Circuit: The power distribution block is where the incoming voltage is applied to. L1 and L3 are branched off to supply the 208-240 volts single phase to the two .5 amp slo-blo fuses. This voltage might be stepped down by a s[...]

66 2. "DOOR" Circuit Theory of the "DOOR" Circuit: Providing that the 4 amp fuse, the 24 volt transformer , and the overloads (drive and blower) are okay , 24 A/ C volts will be supplied to the "COM" terminal of the door switch relay . This 24 volts is branched off through the lint drawer switch, and the two magnetic d[...]

67 3. Drive Motor Circuit: IMPOR T ANT : The L.E.D. indicator on the computer board that reads "DOOR" must be on in order to successfully troubleshoot the following. Theory of the Drive Circuit: The Drive (tumbler and basket) Motor converts the 3-phase (3 ø) power source entering the drive motor thermal magnetic overload. The overload cu[...]

68 IMPOR T ANT : The L.E.D. indicator on the computer board that reads "DOOR" must be on in order to successfully troubleshoot the following. Theory of the Drive Circuit: The incoming voltage L1, L2, and L3 are supplied to the power distribution block. Each line of this 3-phase voltage is then fused with cartridge type fuses rated for the[...]

69 4. Blower Motor Circiut IMPOR T ANT : The L.E.D. indicator on the computer board that reads "DOOR" must be on in order to successfully troubleshoot the following. Theory of the Blower Motor Circuit: The Blower (squirrel cage fan) Motor converts the 3-phase (3ø) power source entering the Blower Motor thermal magnetic overload. The over[...]

70 IMPOR T ANT : The L.E.D. indicator on the computer board that reads "DOOR" must be on in order to successfully troubleshoot the following. Theory of the Blower Motor Circuit: The incoming voltage L1,L2, and L3 are supplied to the power distribution block. Each line of this 3 phase voltage is then fused with cartridge type fuses rated f[...]

71 5. Heat Circuit (Gas Models): IMPOR T ANT : The L.E.D. indicator on the computer board that reads "DOOR" must be on in order to successfully troubleshoot the following. Theory of the "HEA T" Circuit (Gas): When the computer senses a drop in temperature below the preset temperature it will send 24 A/C volts out of pin #4 of th[...]

72 6. "HEA T" Cir cuit (S team Models): IMPOR T ANT : The L.E.D. indicator on the computer board that reads "DOOR" must be on in order to successfully troubleshoot the following. Theory of the "HEA T" Circuit (S team): When the computer senses a drop in temperature below the preset temperature it will send 24 A/C volts[...]

73 7. Cycle Done Circuit: Theory of the "CYCLE DONE" Circuit: When the dryer has come to the end of the drying/cooling cycle of the dryer the air jet spade terminal on the microprocessor will be energized with 24 A/C volts. This 24 A/C volts will then be present across the coil of the air jet sensor relay . The relay closes and the 24 vol[...]

74 SECTION VIII PHASE 5 OPL SYSTEM DIAGNOSTICS ALL major circuits, including door , microprocessor temperature sensor , heat and motor circuits are monitored. The Phase 5 OPL microprocessor controller will inform the user , via the LED display , of certain failure codes, along with indicators both in the LED display and the outputs of each relay , [...]

75 1. Blower Motor Circuit Indicator - indicator dot is on whenever a cycle is in progress. 2. Heat Controller Indicator - indicator dot is on whenever the Phase 5 OPL microprocessor controller is calling for the heating circuit to be active (on). 3. Reversing Indicator - indicator dot is on when the drive basket (tumbler) motor is operating in the[...]

76 2. " MTR " Output LED Indicator - If the dryer is started and the motor is not operating, yet both the microprocessor controller display motor indicator dot and the "dOOr" input LED indicator are on, but the motor output LED indicator is off, then the fault is in the Phase 5 OPL microprocessor controller itself. If the motor [...]

77 5. " DOOR " LED Indicator - The indicator should be on all the time (even if the dryer is not returning) unless the main door or lint drawer is open or there is a problem (open circuit in the main door or lint drawer circuit). NOTE: If the dryer is started (LED display indicator dots are on) and there are no outputs (heat or motor outp[...]

ADC 450310 1 - 07/28/99-25[...]