AD-15 thru AD-75 Coin Service Manual Phase 5 Microprocessor Controls and Coin Meter Controls (for models mfd. as of February 1992) American Dryer Corporation 88 Currant Road Fall River MA 02720-4781 Telephone: (508) 678-9000 / Fax: (508) 678-9447 E-mail: techsupport@amdry.com www.amdry.com 122796 ADC Part No.
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. OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment or specified in the installation/operator's manual included with the dryer.
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. FOR YOUR SAFETY DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPOR AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE. DO NOT DRY MOP HEADS IN THE DRYER.
Table Of Contents SECTION I (IMPORTANT INFORMATION) ............................................................................. 4 A. SAFETY PRECAUTIONS .................................................................................................... 4 SECTION II (MAINTENANCE) ................................................................................................... 6 A. CLEANING ....................................................................................................................
SECTION V (SERVICING) ......................................................................................................... 19 A. CONTROLS (COMPUTER) ............................................................................................... 19 B. CONTROLS (METER) ....................................................................................................... 23 C. BURNER CONTROLS (Gas) ............................................................................................. 24 D.
SECTION I IMPORTANT INFORMATION A. SAFETY PRECAUTIONS 1. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any appliance. 2. Purchaser / user should consult the local gas supplier for proper instructions to be followed in the event the user smells gas. The instructions should be posted in a prominent location. 3. Dryer must be exhausted to the outdoors. 4.
WARNING: PERSONAL INJURY OR FIRE COULD RESULT. 8. Read and follow all caution and direction labels attached to dryer.
SECTION II MAINTENANCE A. CLEANING A program 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 dependent upon proper air circulation. The accumulation of lint can restrict this air flow.
On steam dryers clean coil. Proper cleaning of the steam coil is necessary to prevent lint build-up between the fins. When cleaning the coil, be extremely careful not to bend the aluminum fins, which will also reduce airflow. If the fins are bent, straighten them by using a comb. Fin combs are available from local air conditioning supply houses. Regular cleaning will prevent lint build-up and blockage of the coil.
SECTION III INSTALLATION 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 & National Standards. ANSI Z223.1 (LATEST EDITION) NATIONAL FUEL GAS CODE ANSI/NFPA NO. 70 (LATEST EDITION) NATIONAL ELECTRIC CODES A. ENCLOSURE AIR SUPPLY and EXHAUST REQUIREMENTS NOTE: The following information is very brief and general.
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 must conform to the applicable requirements of the National Electric Code ANSI/NFPA NO.79-LATEST EDITION.
NOTE: Water column pressure requirements: (measured at the pressure tap on the gas valve body.) Natural Gas - 3.5 to 4 inches W.C.L.P. Gas - 10.5 to 11 inches W.C. 4. The dryer should be operated through one complete cycle to assure that no future adjustments are necessary and that all components are functioning properly. 5. For 3Ø motor models check the electric service phase sequence while the dryer is operating. Check to see if the blower wheel is rotating in the proper direction.
SECTION IV DESCRIPTION OF PARTS A. Control Panel (Microprocessor) Lifting the control door will reveal the control panel assembly. Opening the control panel will allow access to the major components which include the coin acceptors, computer board, and keypad. The coin acceptor sends the signal to the computer that a coin has been inserted. The keypad inputs to the computer what temperature has been selected. The computer controls the entire operation of the machine.
D. Control Box (Non-Computer Control) The non-computer control box is made up of, a 30 position terminal block, fuses, and a 24vac transformer, depending which model, the transformer may be mounted in a different place. The fuses are to protect certain circuits throughout the machine. The 30 position terminal block is used to combine the various common wires throughout the machine for simplicity and ease of service. E. Coin Box and Vault The coin box and vault are located in the control box.
G. Lint Coop The lint coop is the bottom portion of the dryer behind the lint door. Inside the lint coop is the lint screen which prevents lint from entering the exhaust system. The lint screen should be kept clean at all times. On AD-15 and AD-25 models there are two (2) lint screens. The lint screens should be cleaned on a daily basis. Lint screens with tears or holes should be replaced immediately. H.
J. Idler Bearing (Viewing from the rear of the dryer.) The idler assembly is located approximately on the lower left hand side of the dryer. The idler assembly consists of one (1) compound pulley. The idler’s main purpose is to reduce the speed and increase the torque provided to the tumbler bearing. Also, the idler assembly belt tension can be adjusted. AD-15 thru AD-30 requires a 9” x 2-1/2” pulley. AD-50 thru AD-75 requires a 14” x 3” pulley. K.
M. Non-Computer The non-computer machines use thermostats located on the bracket under the basket. These thermostats shut the head off at their rated temperature. AD-15, AD-25, AD-30, AD-50, UD-50 N. Gas Burner Gas heated dryers are equipped with a gas burner located behind the control door. The gas burner assembly consists of the burner tubes, orifices (the orifices have a hole in them to allow gas to flow through.
P. Steam Damper System (Air) The newest type system is called the steam damper. It uses compressed air to open and close the steam damper. Air supply is 80 P.S.I. +/- 10 P.S.I. Q. Electric Oven Electric dryers are equipped with an electric oven located behind the control door. The electric oven assembly consists of the electric oven box, contactor, and heating elements. In an electric oven the elements heat the passing airflow entering the tumbler. All ovens have Kw ratings.
S. Motor Contactor (1Ø Motor) This motor contactor used on a single phase dryer, is located in the rear of the machine, in the Electrical Panel Box. It’s purpose is to transfer the higher voltage to the motor when the contactor coil voltage has been achieved. T. Non-Reversing Contactor (3Ø Motor) The non-reversing contactor is used on 3-phase non-reversing dryers and is located on the upper left hand side of the dryer (view from the rear). It is through the contactor that the voltage inputs are fed.
U. Hi-Limit Thermostat (Gas and Electric Models Only) The hi-limit thermostat is another safety device that we use on gas and electric models. The hi-limit is located in the burner or oven area. The hi-limit switch cuts off the heat if the temperature exceeds 290° for electric models or 330º for gas models. Under normal conditions the only way this device would shut off the heat is when the air flow changes to the extent of making the flame brush up against it.
SECTION V SERVICING All electrical/mechanical service or repairs should be made with the electrical power to the dryer disconnected (power off). WARNING: Personal injury could result. The information provided in this section should not be misconstrued as a device for use by untrained persons making repairs. Service work should be performed by competent technicians in accordance with local state and federal codes.
TO REPLACE COMPUTER 1. Discontinue power to dryer. 2. Disconnect main power harness from the rear of the computer by squeezing the top locking tab and pulling connector straight back. 3. Disconnect the green ground wire from the computer. 4. Disconnect the keypad ribbon from the computer. 5. Remove the two (2) screws securing the computer to the control panel and remove computer from panel, by pulling upwards on the corners. 6. Install new computer by reversing this procedure. 7.
TO REPLACE COIN ACCEPTOR 1. Discontinue power to dryer. 2. Swing control panel open. 3. Unplug optic switch harness connector. 4. Remove one (1) screw holding coin acceptor in place. 5. Pull coin acceptor out gently. 6. Reverse procedure for installing new acceptor. TO REMOVE OPTIC SWITCH 1. Unplug optic switch connector. 2. Remove screw and washer holding optic switch to the coin acceptor and pull optic switch away. 3. Reverse procedure for installing new optic switch.
TO REPLACE COMPUTER TEMPERATURE SENSOR PROBE 1. Discontinue power to dryer. 2. Remove M.P. sensor bracket assembly from the dryer. A. Disconnect sensor bracket harness connector. B. Loosen the two (2) phillips head screws securing the bracket assembly to the dryer and remove the bracket from the dryer. NOTE: Do not remove screws 3. Disassemble sensor probe from bracket assembly by removing the top push-on fastener securing the probe to the bracket. Use a small screwdriver to slowly pry the fastener off.
B. CONTROLS (METER) TO REPLACE ROTARY METER 1. Discontinue power to dryer. 2. Swing control panel open. 3. Remove two (2) freespin washernuts and dissconnect obstructive wiring. The two (2) freespin washernuts are located as follows: One is on top of the meter and the 2nd is on the bottom right hand corner of the meter. Remove wiring from the meter switches (Note: be sure to check wiring diagram for proper installation of new meter) also remove the one (1) yellow meter motor wire from the 30 position block.
TO REPLACE CAM 1. Disconnect power to dryer. 2. Remove control panel from dry. A. Swing control panel open and remove main power harness. B. Lift panel off of hinges and remove. 3. With a small screw driver pry the cam and brass fixture off of motor shaft. 4. Reverse procedure for installing new cam. NOTE: When installing new cam place fixture on cam first. Align flat side of the hold on the fixture with the flat surface of the shaft.
TO REPLACE SPARK IGNITOR 1. Discontinue power to dryer. 2. Disconnect HV connector and flame probe connection from ignitor. 3. Disassemble ignitor from burner by removing the two (2) self-tapping screws. 4. Reverse procedure for installing new ignitor probe. NOTE: Before re-establishing power to dryer, visually check the following: (see illustration) 1. The flame probe, ignitor probe, and ground rod are all on the same line of axis. 2.
TO REPLACE MAIN BURNER ORIFICES (See Chart On Following Page) 1. Refer to “ TO REPLACE GAS VALVE” and follow steps one through six. 2. Unscrew main burner orifices and replace. NOTE: Use extreme care when removing and replacing orifices. These orifices are made of brass and are easily damaged. 3. Reverse the removal procedure for re-installing. WARNING: Test all connections for leaks by brushing on a soapy water solution. “ Never Test For Leaks With A Flame”.
DSI Burner Orifice Conversion Listing* Btu Per Hour Rating Qty. D.M.S. P/N Qty. D.M.S. P/N L.P.
TO CONVERT FROM NATURAL TO L.P. GAS 1. Disconnect electrical power to dryer. 2. Close all shut-off valves in dryer gas supply line. 3. Disconnect gas valve wiring. NOTE: Identify location of each wire for correct re-installation. 4. Break union connection (nut) between union shut off and gas valve. 5. Loosen and remove screws from bracket holding the gas valve / manifold assembly to burner box. 6. Remove gas valve / manifold assembly from dryer. 7. Unscrew main burner orifices and replace with L.P.
TO REPLACE BURNER TUBES 1. Discontinue power to dryer. 2. Close shut off valve in gas supply line. 3. Disconnect gas valve wiring. 4. Break union connection before gas valve. 5. Loosen and remove two (2) screws securing pipe bracket to the burner. 6. Remove gas valve / manifold assembly from the dryer. 7. Remove the screws securing the front flanges of the burner tubes to the burner rest. 8. Remove burner tubes by sliding them out. 9. Replace by reversing procedure.
TO REPLACE DSI MODULE (For models AD-25, AD-285, AD-50, UD-50) 1. Discontinue power to the dryer. 2. Remove the wirers connected to the terminal strip at the bottom of the module. 3. Remove the soft orange high voltage wire from the module. 4. Remove the two (2) screws securing the module to the plate. 5. Replace module by reversing process. D. STEAM CONTROLS INSTALLATION Piping must be installed in accordance with good commercial steam system practice.
TO REPLACE STEAM COIL (DAMPER SYSTEM) 1. Discontinue power to dryer. 2. Remove the four (4) lock washers and hex nuts securing the hinges to steam coil. 3. Remove hinges from steam coil housing (these will be used on new assembly). 4. Remove six (6) washers and hex nuts securing steam coil to dryer. 5. Remove steam coil assembly. 6. Reverse procedure for new steam coil assembly. TO REPLACE PISTON 1. Discontinue power to dryer. 2.
TO REPLACE THE NEEDLE VALVE 1. Discontinue power to dryer. 2. Discontinue the air to the dryer. 3. Remove the 1/8” brass close nipple from the needle valve. 4. Remove the 1/8” MPT connecctor from the needle valve. 5. Remove the needle valve. 6. Reverse procedure to install new needle valve. TO REPLACE THE 3-WAY MICROVALVE 1. Discontinue power to dryer. 2. Discontinue the air to the dryer. 3. Remove inlet side of air the 3-way valve. 4.
E. ELECTRICAL OVEN CONTROLS TO REPLACE ELECTRICAL ELEMENTS 1. Discontinue power to dryer. 2. Remove cover by removing two (2) screws and lifting the cover. 3. Remove the screws and wiring holding the element in place at the rear of the oven. 4. From the front of the oven, slide out element. 5. Reverse procedure for installation of new element. TO REPLACE OVEN CONTACTOR 1. Discontinue power to dryer. 2. Remove wiring from contactor. 3. Remove three (3) nuts and lugnuts from the studs. 4.
F. THERMOSTATS and TEMPERATURE SENSOR TO REPLACE HI-LIMIT THERMOSTAT (330 DEGREES GAS, 290 DEGREES ELECTRIC) This thermostat is an important safety device serving as an added protection against failure of the air sail switch to open in the event of motor failure or reduced air flow condition. IMPORTANT: Under no circumstances should heat circuit safety devices ever be disabled. 1. Discontinue power to dryer. 2. Disconnect wires from hi-limit thermostat. 3.
4. Slide bracket to the rear of the dryer and remove from machine. 5. See diagram for location and identification of which thermostat you need to change. 6. Remove the two (2) screws and washers and nuts accompanying the proper thermostat. 7. Remove the two (2) connectors on the thermostat. 8. Remove thermostat. 9. Reverse procedure for installing new thermostat. TO REMOVE THE TEMPERATURE SENSOR OR HIGH HEAT PROTECTOR (MICROPROCESSOR MODELS) A. HIGH HEAT PROTECTOR 1. Discontinue power to dryer. 2.
5. Disassemble sensor probe from bracket assembly by removing the top push-on fastener securing the probe to the basket. 6. Disconnect the two (2) orange wires from the high heat temperature thermostat remove the four (4) position connector, wires, and probe from the bracket assembly. 7. Install new probe assembly (ADC P/N: 880251) by reversing procedure. G. SAIL SWITCH ASSEMBLY (Gas and Electric Models) The sail switch is a heat circuit safety device which controls the heat circuit only.
TO ADJUST SAIL SWITCH 1. Operate the installed dryer normally to verify that the heat system is fully operational. 2. Open the main dryer door. 3. Manually depress the door switch actuator. 4. While continuing to depress the door switch actuator, and with the door open, start the dryer. 5. If the heat system is not activated in 15 seconds, the sail switch is properly adjusted. 6.
TO REPLACE MAIN DOOR ASSEMBLY 1. Remove screws holding main door to main door hinge. 2. Reverse this procedure for reinstalling new main door assembly. TO INSTALL NEW MAIN DOOR GLASS 1. Remove main door assembly from dryer (follow main door removal procedure). 2. Lay main door on a flat surface with front of door face down. 3. Remove glass and clean all old sealant off main door. This area must be completely cleaned for correct bonding. 4.
6. Remove the screws securing the front panel to the dryer. 7. Gently remove front panel assembly from dryer. IMPORTANT: When removing front panel assembly be careful not to damage main door switch wires disconnected in step 2. 8. Reverse this procedure for installing new front panel. TO REPLACE MAIN DOOR HINGE 1. Discontinue power to dryer. 2. Follow procedure for removal of main door assembly. 3. Follow procedure for removal of front panel assembly. 4.
I. TUMBLER AND BEARING ASSEMBLY (Remove backguard to access assembly) TO REPLACE TUMBLER PULLEY 1. Remove backguard. 2. Loosen v-belts, then rotate pulley and roll v-belts out of grooves. 3. Loosen two (2) set screws on the pulley and pull the pulley off the shaft. 4. Reverse procedure for installing new tumbler pulley. NOTE: Check belt alignment before operating dryer. TO REPLACE THE REAR TUMBLER BEARING NOTE: Illustration represents models AD-30 through AD-50.
TO REPLACE THE FRONT TUMBLER BEARING NOTE: Illustration represents models AD-30 through AD-50. Models AD-15 and AD-25 use a 1 1/4” diameter flange bearing. The same procedure applies to both. 1. Remove tumbler pulley and bearing box (follow “TO REPLACE THE REAR TUMBLER BEARING” steps 1 through 4). 2. Loosen set screws on rear tumbler bearing. NOTE: Check tension of belts and alignment of tumbler before operating dryer. 3.
J. IDLER AND BEARING ASSEMBLY (Remove backguard to access assembly.) TO REPLACE IDLER PULLEY 1. Remove backguard. 2. Loosen v-belts, then rotate pulley and roll v-belts out of grooves. 3. Loosen the two (2) set screws on the pulley and pull off the shaft. 4. Reverse procedure for installing new idler pulley. NOTE: Check tension and alignment of belts before operating dryer. TO REPLACE IDLER BEARING 1. Remove idler pulley (follow “TO REPLACE IDLER PULLEY”). 2. Remove idler arm. A.
K. DRIVE PULLEY (Remove backgaurd to access assembly) 1. Remove backguard. 2. Loosen v-belts then rotate pulley and roll v-belts out of grooves. 3. Loosen set screws and pulley motor pulley out. NOTE: If rust has developed on the shaft use an emery cloth to polish the shaft. 4. Reverse procedure for installing new drive pulley. NOTE: Check tension and alignment of belts before operating dryer. L. TUMBLER (BASKET) TUMBLER ALIGNMENT (VERTICAL) 1. Discontinue power to dryer. 2. Remove backguard. 3.
8. Tighten the four (4) hex head bolts on the sides of the bearing box, and the two (2) allen head adjustment screws. 9. Replace backguard. 10. Reconnect power to dryer. TUMBLER ALIGNMENT (LATERAL) 1. Discontinue power to the dryer. 2. Remove backguard. 3. Loosen the two (2) hex head bolts, (one turn is enough), that holds the pillow block bearings to the bearing box. 4. Back off the two (2) jam nuts on the side adjustment bolts.
TO REPLACE THE TUMBLER AND/OR TUMBLER SUPPORT 1. Remove tumbler pulley and bearing box (follow “TO REPLACE THE REAR TUMBLER BEARING” steps 1 through 4). 2. Remove front panel assembly. A. Discontinue power to dryer. B. Disconnect main door switch wiring from inside control wire box. NOTE: Identify location of each wire for correct re-installation. C. Open control (service) door. D. Open lint door. E. Remove the screws securing the front panel to the dryer. F.
7. Check tumbler lateral and vertical alignment. Also, check belt tension and alignment. 8. Replace backguard and re-establish power to dryer. M. V-BELTS (REFER TO ILLUSTRATION IN SECTIONS I, J, and K) V-Belts should have proper tension. If too loose, they will slip, if too tight excessive wear on the bearing will result. If the pulleys are not properly aligned, excessive belt wear will result. Proper belt tension will allow 1/ 2” displacement under normal thumb pressure at mid span of the belt.
TO REPLACE V-BELTS 1. Loosen tension on V-Belts, so that they can easily be rolled off pulleys. 2. Replace V-Belts. 3. Re-tighten V-Belts and adjust tension and alignment per previous instructions. N. MOTOR TO REPLACE MOTOR 1. Discontinue power to dryer. 2. Remove drive belt. 3. Disconnect wiring harness from motor. 4. Remove nuts and washers holding the motor mount to the rear of the dryer and pull motor mount away. 5. Remove the two (2) left hand nuts on the motor shaft retaining the impeller.
P. LINTSCREEN TO REPLACE LINTSCREEN 1. Open lint door and remove. 2. Remove the two (2) hex head screws securing lintscreen, hold down in place and remove from trap. 3. Slide lintscreen out along the lint coop track. 4. Reverse procedure for installing new lintscreen. 5. Close lint door.
SECTION VI TROUBLE SHOOTING The information provided will help isolate the most probable components associated with the difficulty described. The experienced technician realizes, however, that a loose connection or broken or shorted wire may be at fault where electrical components are concerned.... not necessarily the suspect component itself. Electrical parts should always be checked for failure before being returned to the factory.
A. PHASE 5 COIN SYSTEM DIAGNOSTICS All major circuits, including door, microprocessor temperature sensor, heat and motor circuits are monitored. The Phase 5 coin microprocessor controller will inform the user via the L.E.D. display of certain failure codes along with indicators both in L.E.D. display at the outputs of each relay and door switch circuit to easily identify failures. DIAGNOSTIC (L.E.D. DISPLAY) FAILURE CODES 1. “dOOr” - indicates door switch circuit is open. a.
L.E.D. DISPLAY INDICATORS The L.E.D. indiicator dots located at the top portion of the L.E.D. display (as shown in the illustration below) insicate the Phase 5 coin microprocessor controller output functions while a cycle is in progress. These dots do not necessarily mean that the outputs are functioning. They are only indicating that the function (output) should be active (on). 1.
2. “MOTOR” Output L.E.D. 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 L.E.D. indicator are on, but the motor output L.E.D. indiacator is off, then the fault is in the Phase 5 coin microprocessor controller itself. If the motor is not operating and the MOTOR output indicator is on, then the problem is elsewhere (i.e., external of the microprocessor controller). 3. “HEAT” Output L.E.D.
A. NO HEAT CONDITION (Gas Models) The following procedure must be performed with the microprocessor controller display in the normal operating mode, and the heat indicator dot on, and the L.E.D. heat output light on. Voltage is 24 VAC unless otherwise specified. 1. Check to see if DSI module fault indicator L.E.D. is on or flashing. If yes, refer to “DSI” Trouble Shooting Booklet. (P/N: 450119) 2. Check for voltage (approx. 25VAC) across DSI module terminals “STAT” or “TH” and “GND.
4. Check for voltage across TB#4 and TB#7. If voltage is evident, problem is defective burner hi-limit switch P/N: 130401 or the sail switch* P/N: 122200, or the harness connecting these two devices to the terminal (block #4 and #2). 5. Check for voltage across TB#3 and TB#7. If voltage is evident, problem is defective basket hi-limit switch P/N: 130103 or the harness connecting this device to the terminal block #3 and /#4). 6.
B. NO HEAT CONDITION (STEAM MODELS) The following procedure must be performed with the microprocessor controller in the normal operating mode, and the heat dot on, and the L.E.D. heat output light is on. Make sure that 80psi +/- 10 is supllied to the 3-way microvalve. Your check for voltages should be 24 VAC unless otherwise specified. 1. Check for voltage across the two in-line connectors that the 3-way microvalve is connected to. If voltage is evident, replace steam valve solenoid. 2.
4. Check for voltage across the computer 15-pin connector #4 (this is a orange wire), and the GND. Terminal on the computer. If voltage is evedent, problem is the orange wire from the computer’s 15-pin connector #4 to the TB#3. There is a bad connection on either end or faulty wire. If no voltage is evident, problem is faulty computer.
C. NO HEAT CONDITION (ELECTRIC DRYERS) The following procedure must be performed with the microprocessor controller display in the normal operating mode and the heat indicator dot is on, and the L.E.D. heat output light is on. Your check for voltages should be 24 VAC unless otherwise specified. 1. Check to see if voltage is present across the top of the oven contactor. If no voltage is preseent, problem is incoming voltage to machine. Check circuit breaker or protection fuses. 2.
4. Check for voltage across TB #4 AND #7. If voltage is evident, problem is faulty sail switch* (P/N: 122200) or bad wire or termination in the harness connecting the sail switch* and TB #4 and TB #2. 5. Check for voltage across TB #3 and #7. If voltage is evident, problem is faulty basket hi-limit switch (P/N: 130103), or bad wire or termination in that harness between TB #3 and #4. 6. Check for voltage across the computer 15 pin connector, #4 (this is an orange wire), and the GND.
D. NO START CONDITION Follow this test procedure, providing that the microprocessor controller is functioning where the display is in the normal operating mode and the motor indicator dot is on, and the L.E.D. motor output light is on. The voltage you should be reading is 24 VAC unless otherwise specified. 1. Check to see if “dOOr” L.E.D. input light is on. (located on component side of computer board.) If light is off, refer to “dOOr” in the trouble shooting section. 2.
E. NO DISPLAY CONDITIONS 1. Check power supply. (dryer voltage 110v, 208v, 220v ...) 1Ø Motors 2. Check for voltage across (L1) and (L2) of motor relay. (110v, 208v, 220v ...) For 3 phase machines, check across (L1) and (L3). If no voltage is evident, problem is bad wire(s) or termination from circuit breaker panel to top of motor contactor. 3. Check the .5 amp fuse(s) in the control box. If dryer is rated at 110v, 115v, or 120v there will only be one fuse. Voltages of 208v, 220v will have two fuses.
5. Check for voltage across the computer’s 15-pin connector #7 and #13 (110v, 208v, 220v). If no voltage is evident, problem is bad wire or termination from the computer’s 15-pin connector #7 and #13 to TB #6 and #8. If voltage is evident, problem is faulty computer.
F. “sSFL” DISPLAY CONDITION When the display reads “dSFL” this condition indicates a fault in the microprocessor controllers heat circuit. This circuit includes the microprocessor controller, microprocessor temperature sensor (located in lint compartment) and wires to and from these two (2) points. 1. Check to see if microprocessor controller has 1/8 amp fuse on the board, if it does check with out ohm meter. If no continuity replace with ADC P/N: 136048. If fuse repeatedly burns out go to step 4. 2.
4. Check for continuity across each microprocessor sensor wire (microprocessor 15-position connector hole no. 10 and 15) to ground. If continuity is evident, problem is wire pinched to ground somewhere behind the front panel area. 5. If above procedures check out okay, problem is a defective microprocessor temperature sensor.
G. “dOOr” DISPLAY CONDITION When the display reads “dOOr,” this indicates that there is a fault (open circuit) somewhere in the microprocessor controller’s door switch circuit. Includes the door switch, microprocessor controller and the wires to and from these two points. Before following this test procedure, check the component side of the computer to see if L.E.D. input light is on. If on, replace computer. Voltage is 24VAC unless otherwise specified. 1. Remove door switch assembly from dryer.
3. Check for voltage across microprocessor’s 15-Pin connector #2 (yellow wire), and the spade terminal on the microprocessor marked GND. If no voltage, problem is bad wire or termination in wire from microprocessor cconnector #2 to TB #5. If voltage, problem is faulty computer.
SECTION VII TECHNICAL INFORMATION A. DATA LABEL Contact American Dryer Corporation When contacting American Dryer Corporation certain information is required to insure proper service/parts information from American Dryer. This information is on the data label located on the control door for models 24,27,285 and 75, and on the back of the dryer on all other models. When contacting American Dryer please have the model number and serial number handy. THE DATA LABEL 1.
6. ELECTRIC SERVICE - Describes the electric service for your particular models. 7. GAS MANIFOLD PRESSURE - Describes the manifold pressure aas taken at the gas valve pressure tap. (see HOW TO USE A MANOMETER) B. USING A MANOMETER HOW TO USE A MANOMETER 1. With dryer in non-operating mode remove plug on the gas valve pressure tap. 2. Attach plastic tubing to pressure tap. (fitting is supplied with manometer see illustration.) 3. Attach manometer to dryer using magnet.
C. L.E.D.
D. COMPUTER LOGIC AND WIRING DIAGRAM 1. Operator inserts coin. 2. Operator enters desired selection (s) ... 3. Information Entered Is Sent To The Micro-Controller Via The Keyboard Ribbon. 4. The input information is sorted/processed and executed by the micro-computer chip. 5. The micro-computer output signal activates the contactors and DSI module which control machines functions.
This number is located on the top right hand corner of the diagram. It is a six (6) digit number followed by a letter to distinguish the version dates (see illustration). The wiring diagram on the next page is specifically for dryers manufactured at the time of publishing. Your particular model will be different depending on the date of manufacturing and options available. The correct wiring diagram and number is taped to the rear of the control door on each dryer.
ADC 450141 1 - 03/03/93-100 4 * 04/27/94-250 7 * 08/26/96-100 10 - 06/18/99-100 2 - 04/23/93-200 5 * 04/14/95-200 8 * 12/30/96-100 11 * 10/26/00-50 3 - 10/26/93-200 6 - 05/08/95-100 9 - 05/20/98-100 12 * 03/13/03-10
