AD-200 Service Manual with Non-Tilt Options 1993 thru 1998 American Dryer Corporation 88 Currant Road Fall River, MA 02720-4781 Telephone: (508) 678-9000 / Fax: (508) 678-9447 e-mail: techsupport@amdry.com 062599DMG/cms 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. CAUTION LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION. VERIFY PROPER OPERATION AFTER SERVICING.
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. DO NOT USE DRYER IN THE PRESENCE OF DRY CLEANING FUMES. IMPORTANT PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment and/or specified in the installation/operator's manual included with the dryer. Dryer(s) must not be installed or stored in an area where it will be exposed to water and/or weather.
Table of Contents SECTION I SAFETY PRECAUTIONS .......................................................................................... 2 SECTION II ROUTINE MAINTENANCE ...................................................................................... 4 SECTION III SPECIFICATIONS and DIMENSIONS ..................................................................... 8 SECTION IV INSTALLATION REQUIREMENTS .........................................................................
SECTION I SAFETY PRECAUTIONS CAUTION: The dryer should never be left unattended while in operation. WARNING: 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. WARNING: The dryer must never be operated with any of the back guards, outer tops, or service panels removed. PERSONAL INJURY or FIRE COULD RESULT. 1.
WARNING: DO NOT dry mop heads. Contamination by wax or flammable solvent will create a fire hazard. WARNING: 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 should be established for the inspection and cleaning of lint in the burner area, exhaust duct work, and area around the back of the dryer.
SECTION II ROUTINE MAINTENANCE A. CLEANING A program 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 dependent upon proper air circulation. The accumulation of lint can restrict this air flow.
WARNING: TO AVOID THE HAZARD OF ELECTRICAL SHOCK, DISCONTINUE ELECTRICAL SUPPLY TO THE DRYER. MONTHLY 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 - clean the steam coil fins. We suggest using compressed air and a vacuum cleaner with brush attachment. NOTE: When cleaning steam coil fins, be careful not to bend the fins.
B. LUBRICATION MONTHLY 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 oil.) Replace fill plug. NOTE: LUBRICATOR SHOULD BE SET AT 1 DROP PER CYCLE. NOTE: REGULATOR PRESSURE IS TO BE SET AT 80 PSI.
C. ADJUSTMENTS 7 DAYS AFTER INSTALLATION 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. Tighten loose V-belts when necessary. Complete operational check of controls and valves. Complete operational check of ALL safety devices (i.e.
SECTION III SPECIFICATIONS and DIMENSIONS A. SPECIFICATIONS (Gas and Steam Models) Steam* Gas* MAXIMUM CAPACITY (DRY WEIGHT) BASKET (TUMBLER) DIAMETER BASKET (TUMBLER) DEPTH BASKET (TUMBLER) VOLUME DRIVE MOTOR BLOWER MOTOR (GAS/STEAM) DOOR OPENING DOOR SILL HEIGHT - LEVEL COMPRESSED AIR COMPRESSED AIR CONNECTION VOLTAGE AVAILABLE HEAT INPUT APPROX. WEIGHT (UNCRATED) AIRFLOW Inlet Pipe Size VOLTAGE AVAILABLE APPROX. WEIGHT (UNCRATED) AIRFLOW 200 lbs. 90.9 kg 62-1/2" 158.75 cm 42" 106.7 cm 74.5 cu. ft.
SECTION IV 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: National Fuel Gas Code ANSI Z223.1-LATEST EDITION or National Electric Code ANSI/NFPA No. 70-LATEST EDITION 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. 70-LATEST EDITION.
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 Direct Spark Ignition (DSI) module to monitor that a flame is established.
a. The Direct Spark Ignition (DSI) Module is a 24 VAC 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 diagnostic capabilities. 24 VAC Direct Spark Ignition (DSI) Module b.
e. The Tumbler 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). MAN3484 225º F Thermostat 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 in one; one in series with the other. This is a safety feature which provides protection against gas flow in the event that one of the valves does not seat properly.
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B. Troubleshooting The Direct Spark Ignition (DSI) System NOTE: The troubleshooting information provided in this manual is intended for use by qualified service technicians only. OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment or specified in the AD-200 Non-Tilting Installation/Operator's Manual (ADC Part No. 112142) included with the dryer. IMPORTANT: UNDER NO CIRCUMSTANCES SHOULD ANY SAFETY or HEAT CIRCUIT DEVICES EVER BE DISABLED.
1. Direct Spark Ignition (DSI) Troubleshooting Terms (definitions) a. DSI MODULE "RED" L.E.D. INDICATOR 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 and troubleshooting procedures of the DSI system. b. LOCK-OUT MODE - DSI module "red" L.E.D. indicator light stays on continuously.
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 insure that the red high voltage wire (between the ignitor spark electrode and the DSI module) is not wrapped around the sensor probe wire (the wire between the DSI module FP terminal and the ignitor and flame-probe assembly). If the wires are touching one another, separate and secure in place AWAY FROM ONE ANOTHER.
c. Three Visual 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 VISUAL CHECK on page 21.
d. Troubleshooting Flow Chart - Quick Reference...
e. Troubleshooting Flow Chart - Quick Reference...
f. Troubleshooting Flow Chart - Quick Reference...
2. Troubleshooting/System Detailed Diagnosis When the dryer calls for heat, 24 VAC 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. indicator will light "green"; the gas valve will be energized, and the spark burst will be evident (on) for approximately 8 seconds at the tip of the electrode flame-probe assembly.
a) Connect the water column test gauge (manometer) to the gas valve pressure tap (1/8" N.P.T.). Refer to the illustration on previous page (page 22). b) Start the dryer ... with the burner on, the correct water column pressure (W.C.) reading in inches should be: Natural Gas ..................................... 3.5 - 4 inches W.C. L.P. (liquid propane) Gas ................ 10.5 - 11 inches W.C.
(a) To check or set the 1/8" GAP, use a DSI Gap Feeler Gauge or similar device to determine GAP size. DO NOT USE FEELER TO SET THE GAP, use it only to determine the size of the gap. If an adjustment is necessary, bend the ground rod to achieve the correct GAP, then recheck the 1/8" GAP with a feeler gauge.
3) Air Turbulence 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" CONTINUOUSLY).
6) Direct Spark Ignition (DSI) 24 VAC Transformer The DSI transformer is designed to step down the operating voltage of the dryer to 24 VAC to operate the DSI module. This transformer, like ALL transformers is two (2) sided; a) Primary Side... This is the incoming voltage side - 208 VAC, 230/240 VAC, 380 VAC, 416 VAC, 480 VAC - of the transformer. b) Secondary Side... This is the step down side - 24 VAC - of the transformer. (If the dryer is above 240 VAC a secondary voltage of 240 VAC will also be present.
C. Natural Gas To L.P. (Liquid Propane) Gas Conversion Instructions IMPORTANT: CONVERSION MUST BE PERFORMED BY COMPETENT TECHNICIANS IN ACCORDANCE WITH LOCAL and STATE CODES. NOTE: Converting the dryer to L.P. Gas disables the internal regulator of the gas valve, therefore, an external regulator must be provided at the source of the L.P. gas supply (L.P. tank) or the dryer. The water column (W.C.) gas pressure must be regulated to between 10.5 inches and 11 inches for safe and efficient dryer operation.
12. Reestablish electrical service to the dryer. a. Test ALL connections for leaks. IMPORTANT: Test ALL connections for leaks by brushing on a soapy water solution (liquid detergent works well). WARNING: NEVER TEST FOR LEAKS WITH A FLAME! 13. Operate the dryer through one (1) complete cycle to insure proper operation.
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 open, ambient air is drawn through the coil providing heat to the dryer.
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 compressed air is sent to the piston. The piston rod extends, pushing the hinged steam damper plate to the open position.
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) To install new steam damper cylinder (piston), reverse above procedure (steps #4 through #1). b. Steam Solenoid Valve Replacement 1) Disconnect compressed air supply from the dryer.
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) Wait 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 to bleed off any residual steam pressure. CAUTION: MAKE CERTAIN THAT THE ENTIRE STEAM SYSTEM (coil, lines, valves, etc.
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 Step #8. 17) Reinstall steam damper cylinder (piston) removed in Step #6. 18) Reestablish electrical service to the dryer.
E. Sprinkler System Description The AD-200 sprinkler system is monitored by a microprocessor based temperature controller as a designated "FAIL-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 Temperature Device (RTD) reaches 575º F, one (1) set of contact in the controller will open, disabling the power (electric supply) to the dryer.
d) Sprinkler Digital Temperature Controller The sprinkler digital temperature controller is a programmable microprocessor used to monitor temperatures via a Resistive Temperature Device (RTD). NOTE: Operating parameters are preset at the factory and should not require any adjustment. 2. Sprinkler System Operation NOTE: Refer to the ladder diagram provided with the dryer for relay logic.
3. Sprinkler System Component Replacement a. Resistive Temperature Device (RTD) Replacement 1) Turn 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 RTD from the terminal strip. NOTE: Identify the wires removed for proper reinstallation. 6) Loosen the cord grip cap. 7) Remove Resistive Temperature Device (RTD).
b. Sprinkler Valve Replacement 1) Turn the water supply to the dryer off. 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 the sprinkler valve assembly. 8) Unscrew the sprinkler valve from the tubing. 9) To install new sprinkler valve, reverse above procedure (steps #8 through #1).
c. 3 HP Control Relay Replacement WARNING: THE SPRINKLER CIRCUIT HAS A SEPARATE POWER SUPPLY (then the power supply for the dryer). DISCONNECT and LOCK-OUT BOTH POWER SUPPLIES BEFORE SERVICING THE DRYER. 1) Mark and identify the wires that will be removed for proper reinstallation. 2) Press down on the control relay and lift the bottom out and up to remove from the din rail. 3) Remove the wires. 4) Replace the bad control relay. 5) Replace the wires removed from Step #3.
MAN3169 39
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 lint drawer is opened before the air jet cycle is complete. 2. Air Jet Component Replacement a.
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) To install new air jet assembly, reverse above procedure (steps #5 through #1). b. Pneumatic Valve Muffler Replacement 1) Disconnect compressed air supply from the dryer. 2) Remove damaged or nonfunctional muffler from valve body. 3) Replace muffler by threading into valve body (snug fit).
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 loosened bolts. 4) Remove the bolts from the bushing. 5) Insert bolts into the threaded holes. 6) Tighten the bolts evenly for motor pulley removal.
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) Tighten/secure the new motor to the motor base. 20) 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 affixed to the side of the motor. 21) Reestablish electric service to the dryer. b) Shrouded Pillow Block Bearing Replacement 1) Discontinue electric service to the dryer.
(e) Loosen the set screws on the bushing. (f) Remove the bushing and the pulley. 11) 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) Tighten the set screws in the shrouded pillow block bearing. NOTE: Make certain that the squirrel cage fan (impellor and blower) can spin freely. 13) Reinstall the bushing and the pulley.
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) To install new squirrel cage fan (impellor) , reverse above procedure (steps #6 through #1). d) V-Belt Replacement 1) Discontinue electric service to the dryer. 2) Loosen the bolts securing the blower (fan and impellor) motor. (a) Ease off on the tension bolt.
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. To set the overload, refer to your specific electrical diagrams. The overload is specifically designed for motor applications. It has a current curve built into it so the initial high current draw by the motor will not trip the overload.
2) Auxiliary Contact Block The Auxiliary Contact Block is mounted on the side of the overload. Its' function is to sense an overload 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 (computer). (a) Auxiliary Contact Block Replacement (1) Discontinue electric service to the dryer.
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 spinning action to separate contaminants. A filter which mechanically separates contaminants is also present.
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 November 1, 1995, there are trolley bolts located at the top of the doors to secure the doors onto the track. b.
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. a) For dryers manufactured as of November 1, 1995, loosen the jam nut and screw down the trolley adjustment plates. b) For dryers manufactured prior to November 1, 1995, remove the two (2) trolley adjustment plates. 3) Lift the doors off of the tracks and remove.
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 door that connect/attach the cable cylinder to the door. 5) Remove the two (2) 1/4-20 x 1-1/4" hex head machine screws ... a) Take notice to the wheel assembly configuration.
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) 8-32 x 3/4" screws on each door that connect or attach the cable cylinder to the door. 6) Remove the four (4) 8-32 x 2-1/2" screws that hold each cable cylinder.
d. Proximity Switch Replacement 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 door that connect/attach the cable cylinder to the door. 5) Remove the two (2) 1/4-20 x 1-1/4" hex head machine screws ... a) Take notice to the wheel assembly configuration.
f. 4-Way Valve and 3-Way Valve/Supply Air Disable Valve 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 cap that the valve wire go through. 6) Loosen the appropriate wire on the terminal strip. 7) Identify these wires and make note of their placement.
I. Control Electrical System CAUTION: When servicing the HIGH VOLTAGE section of the dryer, the ELECTRIC SERVICE MUST BE DISABLED. THE "EMERGENCY STOP" BUTTON DOES NOT DISABLE THE HIGH VOLTAGE TO THE DRYER. 1. Control Electrical System Description a. 3-Phase (3ø) Electrical Power The 3-phase (3ø) electrical power for the dryer enters the dryer through the power distribution block located in the dryer base electrical box.
3) 24 VAC Transformer The 24 VAC 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 stop relay which will disable the dryer functions (shut the dryer down) in the event of a fire.
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 VAC to the Phase 5 microprocessor (computer) door signal. This sequence will occur only if the following conditions are met; (1) (2) (3) (4) (5) Blower (impellor and fan) Motor Overload is not tripped.
SECTION VI BASIC TROUBLESHOOTING IMPORTANT: YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY and THE GAS 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.
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 (neither forward FWD or reverse REV) is on. 1. Failed microprocessor controller (computer). C. Drive motor operates in one direction only...
h. Voltage 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 overloads. 2. Failed blower (impellor and fan) motor contactor (relay). 3. Failed blower (fan and impellor) motor.
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 [computer] L.E.D. display does not read door). 1. Failed microprocessor controller (computer). I. Microprocessor controller (computer) L.E.D.
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 diode] display reads "FILL" and when keyboard [touchpad] entries are selected, the L.E.D. [light emitting diode] display continues to read FILL)... 1.
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 (computer) L.E.D. (light emitting diode) display reads SEFL... 1. Rotational sensor circuit failure... fault somewhere in the tumbler (basket) rotation or circuit ... a.
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 in exhaust (for GAS MODELS ONLY). 9. Failed microprocessor controller (computer)... temperature calibration is inaccurate. 10. Failed microprocessor temperature sensor..
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 step down transformer if the incoming voltage is 380 volts or higher. This 208-240 volts is then supplied to the computer.
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 door switches to then supply the 24 volts to the coil of the door switch relay.
3. Drive Motor Circuit: IMPORTANT: 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 (3ø) power source entering the drive motor thermal magnetic overload. The overload current is adjustable by a dial located on the face of the overload. (Refer to the electrical specification diagram for correct current setting.
IMPORTANT: 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 different incoming voltages. The voltage is then supplied to the top half (L1,L2, and L3) of the reversing contactor.
4. Blower Motor Circiut IMPORTANT: 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 overload current is adjustable by a dial located on the face of the overload. (Refer to the electric specification diagram for correct setting.
IMPORTANT: 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 for the different incomings voltages. The voltage is then supplied to the top half (L1,L2, and L3) of the blower and fan contactor.
5. Heat Circuit (Gas Models): IMPORTANT: 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 "HEAT" 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 the 15 pin computer harness. There are 3 heat safety devices in the dryer that will stop the voltage from reaching the D.S.I. direct spark module.
6. "HEAT" Circuit (Steam Models): IMPORTANT: 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 "HEAT" Circuit (Steam): When the computer senses a drop in temperature below the preset temperature it will send 24 A/C volts out of pin #4 of the 15 pin computer harness. There is one heat safety device in the dryer that will stop the voltage from reaching the steam damper valve.
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 volts from the door circuit passes through the air jet sense relay, via cycle done latching relay coil.
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, (and door switch circuit) to easily identify failures. Diagnostic (LED Display) Failure Codes 1. "door" - indicates door switch circuit is open. a.
LED Display Indicators The LED indicator dots located at the top portion of the LED display (as shown in the illustration below) indicate the Phase 5 OPL microprocessor controller output functions while a cycle is in progress. These indicator dots do not necessarily mean that the outputs are functioning. They are only indicating that the function (output) should be active (on). 1. Blower Motor Circuit Indicator - indicator dot is on whenever a cycle is in progress. 2.
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 is not operating and the "MOTOR" output indicator is on, then the problem is elsewhere (i.e., external of the microprocessor controller). 3. "FWD" Output LED Indicator a.
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 output LEDs are off) and the "dOOr" input LED is on, the fault is in the Phase 5 OPL microprocessor controller itself. If the failure was elsewhere (i.e.
ADC 450310 1- 07/28/99-25