American Dryer Corp AD-540 User Manual
AD-540
Mechanical/Electrical
Service Procedure
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
090603SRS/tcosta ADC Part No. 450246
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 qualified technicians should service this equipment.
OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment or specified in the installation manual included with
the dryer.
The following “FOR YOUR SAFETY” caution must be posted near the dryer in a prominent location.
FOR YOUR SAFETY
Do not store or use gasoline or
other flammable vapors and
liquids in the vicinity of this or
any other appliance.
We have tried to make this manual as complete as possible and hope you will find it useful. ADC reserves the right to make
changes from time to time, without notice or obligation, in prices, specifications, colors, and material, and to change or
discontinue models.
POUR VOTRE SÉCURITÉ
Ne pas entreposer ni utiliser d’essence
ni d’autres vapeurs ou liquides
inflammables à proximité de cet
appareil ou de tout autre appareil.
Important
For your convenience, log the following information:
DATE OF PURCHASE ____________________________ MODEL NO. __________________________________________
RESELLER’S NAME _______________________________________________________________________________________
Serial Number(s) ________________________________________________________________________________________
________________________________________________________________________________________
AD-540
________________________________________________________________________________________
Replacement parts can be obtained from your reseller or the ADC factory. When ordering replacement parts from the factory,
you can FAX your order to ADC at (508) 678-9447 or telephone your order directly to the ADC Parts Department at (508)
678-9000. Please specify the dryer model number and serial number in addition to the description and part number, so that
your order is processed accurately and promptly.
The illustrations on the following pages may not depict your particular dryer exactly. The illustrations are a composite of the
various dryer models. Be sure to check the descriptions of the parts thoroughly before ordering.
“IMPORTANT NOTE TO PURCHASER”
Information must be obtained from your local gas supplier on the instructions
to be followed if the user smells gas. These instructions must be posted in a
prominent location near the dryer.
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.
FOR YOUR SAFETY
DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE
VAPORS 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.
CAUTION
DRYERS SHOULD NEVER BE LEFT UNATTENDED WHILE IN
OPERATION.
WARNING
CHILDREN SHOULD NOT BE ALLOWED TO PLAY ON OR NEAR
THE DRYERS.
CHILDREN SHOULD BE SUPERVISED IF NEAR DRYER(S) IN
OPERATION.
WARNING
The dryer must never be operated with any of the back guards or service
panels removed. PERSONAL INJURY OR FIRE COULD RESULT.
WARNING
DRYER MUST NEVER BE OPERATED WITHOUT THE LINT
FILTER OR SCREEN IN PLACE, EVEN IF AN EXTERNAL LINT
COLLECTION SYSTEM IS USED.
IMPORTANT
PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the
equipment and specified in the installation manual included with the dryer.
The wiring diagram for the dryer is located behind the left front control panel.
Table of Contents
SECTION I
IMPORTANT INFORMATION ............................................................................... 3
A. Safety Precautions ...................................................................................................................... 3
SECTION II
ROUTINE MAINTENANCE .................................................................................... 4
A. Cleaning ..................................................................................................................................... 4
B. Adjustments ............................................................................................................................... 5
SECTION III
INSTALLATION REQUIREMENTS ...................................................................... 6
A. Enclosure, Air Supply, and Exhaust Requirements ........................................................................ 6
B. Electrical and Gas Requirements ................................................................................................. 7
C. Operational Service Check Procedure ........................................................................................ 8
SECTION IV
DESCRIPTION OF PARTS ...................................................................................... 9
A. Control Panel ............................................................................................................................. 9
B. Control and Relay Panels ............................................................................................................ 9
C. Coin Box .................................................................................................................................... 9
D. Door Switch (Hinge Block) ....................................................................................................... 10
E. Microprocessor Assembly ........................................................................................................ 10
F. Basket (Tumbler) ...................................................................................................................... 10
G. Basket (Tumbler) and Drive Motor Assembly Arrangement........................................................ 10
H. Idler Arm and Impellor Mount Assembly ................................................................................... 11
I. Drive Motor and Idler Pulley Arrangement ................................................................................ 11
J. Temperature Sensors ................................................................................................................ 11
K. Gas Burner ............................................................................................................................... 12
L. Sail Switch ............................................................................................................................... 12
M. Hi-Limit Thermostat .................................................................................................................. 12
N. Lint Drawer Switch ................................................................................................................... 13
O. Lint Drawer .............................................................................................................................. 13
P. Front Thruster Wheel Bracket Assembly ................................................................................... 13
Q. Rear Basket (Tumbler) Drive Wheels ........................................................................................ 14
R. Rotational Sensor Assembly ...................................................................................................... 14
SECTION V
SERVICE ................................................................................................................... 15
A. Introduction .............................................................................................................................. 15
B. Controls (Computer) ................................................................................................................ 15
C. Burner Controls (Gas) .............................................................................................................. 19
D. Thermostats and Temperature Sensor........................................................................................ 22
E. Sail Switch Assembly ................................................................................................................ 24
F. Front Panel and Main Door Assemblies ..................................................................................... 25
SECTION VI
BCD-1 TYPE MODULE .......................................................................................... 29
A. Introduction .............................................................................................................................. 29
B. General System Information ...................................................................................................... 29
C. G-760 Direct Spark Ignition (DSI) Flowchart ........................................................................... 32
D. Troubleshooting ........................................................................................................................ 33
SECTION VII
TROUBLESHOOTING ........................................................................................... 47
A. Phase 5 Coin System Diagnosis ................................................................................................ 47
B. No Heat Condition (Blower is On) ............................................................................................ 50
C. No Start Condition ................................................................................................................... 52
D. No Display Condition ............................................................................................................... 53
E. “dSFL” Display Condition ........................................................................................................ 54
F. “dOOr” Display Condition ........................................................................................................ 55
SECTION VIII
DATA LABEL INFORMATION ............................................................................. 56
A. Data Label ............................................................................................................................... 56
B. Using a Manometer .................................................................................................................. 57
C. Light Emitting Diode (L.E.D.) Display Codes ............................................................................ 58
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 other
appliance.
2. Purchaser and/or 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(s) must be exhausted to the outdoors.
4. Although ADC produces a very versatile dryer, there are some articles that due to fabric composition or
cleaning method should not be dried in it.
WARNING: Dry only water washed fabrics. DO NOT dry articles spotted or washed in dry
cleaning solvents, a combustible detergent, or “all purpose” cleaners. EXPLOSION
COULD RESULT.
WARNING: DO NOT dry rags or articles coated or contaminated with gasoline, kerosene, oil, paint,
or wax. EXPLOSION COULD RESULT.
WARNING: DO NOT dry mop heads. Contamination by wax or flammable solvents 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 may be a fire hazard.
5. A program should be established for the inspection and cleaning of lint in the burner area and exhaust
ductwork. The frequency of inspection and cleaning can best be determined from experience at each location.
WARNING: The collection of lint in the burner area and exhaust ductwork can create a potential fire
hazard.
6. For personal safety, the dryer must be electrically grounded in accordance with local codes and/or the
National Electrical Code ANSI/NFPA NO. 70-LATEST EDITION or in Canada, the Canadian Electrical
Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION.
NOTE: Failure to do so will VOID THE WARRANTY.
7. UNDER NO CIRCUMSTANCES should the dryer door, lint drawer switches or heat safety devices
ever be disabled.
8. READ AND FOLLOW
ALL CAUTION AND DIRECTION LABELS ATTACHED TO THE DRYER.
WARNING: Children should not be allowed to play on or in the dryers. Children should be supervised
if near dryers in operation.
3
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 ductwork 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 airflow. If the guidelines in this section are met, an ADC dryer will provide
many years of efficient, trouble free and most importantly safe operation.
WARNING: LINT FROM MOST FABRICS IS HIGHLY COMBUSTIBLE. THE
ACCUMULATION OF LINT CAN CREATE A POTENTIAL FIRE HAZARD.
SUGGESTED INTERVAL
DAILY
Clean lint screen. Inspect lint screen and replace if damaged.
90 DAYS
Remove lint accumulation from lint chamber thermostats and sensors.
WARNING: TO AVOID THE HAZARD OF ELECTRICAL SHOCK, DISCONTINUE
ELECTRICAL SUPPLY TO THE DRYER.
Remove lint from the motor air vents and surrounding area.
IMPORTANT: Lint accumulation will restrict internal motor airflow, causing overheating and
irreparable damage. Motor failure due to lint accumulation will VOID THE
WARRANTY.
120 DAYS
Remove lint from gas burner area with a dusting brush or vacuum cleaner attachment.
6 MONTHS
Inspect and remove lint accumulation in customer furnished exhaust ductwork system. Inspect exhaust back draft
dampers to insure they are not binding. Inspect and remove ALL lint accumulation from in and around the control
panel area, including the coin acceptors. Clean lint accumulation from around the basket (tumbler) wrapper area.
WARNING: LINT FROM MOST FABRICS IS HIGHLY COMBUSTIBLE. THE
ACCUMULATION OF LINT CAN CREATE A POTENTIAL FIRE HAZARD.
4
AS REQUIRED:
In cleaning and care of the cabinet, avoid using harsh abrasives. A product intended for the cleaning of appliances
is recommended.
B. ADJUSTMENTS
SUGGESTED INTERVAL
6 MONTHS
Drive belts should be examined. Cracked or seriously frayed belts should be replaced. Tighten loose drive
belts when necessary, and check belt alignment. Complete operational check of control and valves. Complete
operational check of ALL safety devices (door switches, sail switch and burner high limits and lint chamber
thermostats).
12 MONTHS
Inspect bolts, nuts, screws, and nonpermanent gas connections, (unions, sail switch, burner, and lint chamber
thermostats).
5
SECTION III
INSTALLATION REQUIREMENTS
Installation should be performed by competent technicians in accordance with local and state codes. In the
absence of these codes, the installation must conform to applicable American National Standards: ANSI Z223.1-
LATEST EDITION (National Fuel Gas Code) or ANSI/NFPA NO. 70-LATEST EDITION (National Electrical
Code) or in Canada, the installation must conform to applicable Canadian Standards: CAN/CGA-B149.1-M91
(Natural Gas) or CAN/CGA-B149.2-M91 (Liquid Propane [L.P.] Gas) or LATEST EDITION (for General
Installation and Gas Plumbing) or Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION
(for Electrical Connections).
A. ENCLOSURE, AIR SUPPLY, AND EXHAUST REQUIREMENTS
NOTE: The following information is very brief and general. For detailed description, refer to the
Installation Manual supplied with the dryer (ADC PN 113044).
Bulkheads and partitions around the dryer should be made of noncombustible materials. (Refer to appropriate
installation manual for recommended distances and minimum allowances required.)
When the dryer is operating, it draws in room air, heats it, passes this air through the basket (tumbler), and
exhausts it out of the building. Therefore, the room air must be continually replenished from the outdoors. If the
make-up air is inadequate, drying time and drying efficiency will be adversely affected. Ignition problems and
sail switch “fluttering” problems on gas dryers may result, and you could have premature motor failure from
overheating. The air supply must be given careful consideration to ensure proper performance of each dryer.
IMPORTANT: Make-up air must be provided from a source free of dry cleaning solvent fumes.
Make-up air that is contaminated by dry cleaning solvent fumes will result in irreparable
damage to the motors and other dryer components.
Exhaust ductwork should be designed and installed by a competent technician. Improperly sized ductwork will
create excessive back pressure, which will result in slow drying, increased use of energy, and shutdown of the
burner by the airflow (sail) switch, burner hi-limit or lint chamber hi-heat protector thermostat. (Refer to
appropriate installation manual for more details.)
CAUTION: IMPROPERLY SIZED OR INSTALLED EXHAUST DUCTWORK CAN
CREATE A POTENTIAL FIRE HAZARD.
6
B. ELECTRICAL AND GAS REQUIREMENTS
1. Electrical Requirements
It is your responsibility to have
electrician to assure that the electrical installation is adequate and conforms to local and state regulations or
codes. In the absence of such codes, ALL electrical connections, materials, and workmanship must
conform to the applicable requirements of the National Electrical Code ANSI/NFPA NO. 70-LATEST
EDITION or in Canada, the Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION.
2. Grounding
A ground (earth) connection must be provided and installed in accordance with state and local codes. In
the absence of these codes, grounding must conform to applicable requirements of the National Electrical
Code ANSI/NFPA NO. 70-LATEST EDITION, or in Canada, the installation must conform to applicable
Canada Standards: Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION. The
ground connection may be to a proven earth ground at the location service panel.
ALL electrical connections made by a properly licensed and competent
IMPORTANT: Failure to comply with these codes or ordinances and/or the requirements stipulated in
this manual can result in personal injury or component failure.
3. Gas Information
It is your responsibility to have ALL plumbing connections made by a qualified professional to assure that
the gas plumbing installation is adequate and conforms to local and state regulations or codes. In the
absence of such codes, ALL plumbing connections, materials, and workmanship must conform to the
applicable requirements of the National Fuel Gas Code ANSI Z223.1-LATEST EDITION, or in Canada,
the Canadian Installation Codes CAN/CGA-B149.1-M91 (Natural Gas) or CAN/CGA-B149.2-M91 (Liquid
Propane [L.P.] Gas) or LATEST EDITION.
4. Gas Supply
The gas dryer installation must meet the American National Standard...National Fuel Gas Code ANSI
Z2231-LATEST EDITION, or in Canada, the Canadian Installation Codes CAN/CGA-B149.1 M91 (Natural
Gas) or CAN/CGA-B149.2-M91 (L.P. Gas) or LATEST EDITION, as well as local codes and ordinances
and must be done by a qualified professional.
5. Piping Connections
ALL components/materials must conform to National Fuel Gas Code Specifications ANSI Z223.1-LATEST
EDITION, or in Canada, CAN/CGA-B149.1-M91 (Natural Gas) or CAN/CGA-B149.2-M91 (L.P. Gas)
or LATEST EDITION (for General Installation and Gas Plumbing), as well as local codes and ordinances
and must be done by a qualified professional. It is important that gas pressure regulators meet applicable
pressure requirements, and that gas meters be rated for the total amount of ALL the appliance Btus being
supplied.
WARNING: NEVER TEST FOR LEAKS WITH A FLAME!!!
NOTE: Undersized gas piping will result in ignition problems and slow drying and can create a safety
hazard.
7
The dryer must be connected to the type of gas (natural or liquid propane [L.P.]) indicated on the dryer
data label. If this information does not agree with the type of gas available, contact the reseller who sold
the dryer or contact the ADC factory.
The gas input ratings shown on the dryer data label are for elevations up to 2,000 feet (609.6 meters),
unless elevation requirements of over 2,000 feet (609.6 meters) were specified at the time the dryer order
was placed with the factory. The adjustment for dryers in the field for elevations over 2,000 feet (609.6
meters) is made by changing the burner orifices. If this adjustment is necessary, contact the reseller who
sold the dryer or contact the ADC factory.
NOTE: Any burner changes must be made by a qualified technician.
C. OPERATIONAL SERVICE CHECK PROCEDURE
After performing any service or maintenance function, an operational check should be performed to insure that
ALL components are performing properly.
1. Make a complete operational check of
temperature selection switches are functioning properly.
2. Make a complete operational check of ALL safety related circuits, door switches, hi-limit thermostats, sail
switch, and cycling thermostats, etc.
ALL the operating controls to insure that the timing is correct;
8
SECTION IV
DESCRIPTION OF PARTS
A. CONTROL PANEL
The coin panel assembly consists of the coin operator,
a display board, and the keyboard (touch pad) label.
The coin acceptor is used to acknowledge that the
proper coin has been put through the acceptor. The
display board will just display the time and temperature
in a readable number of letter characters. The
keyboard (touch pad) label is used to input Hi, Low,
or Perm Press selection for the dryer to start.
B. CONTROL AND RELAY PANELS
The control and relay panels are located in the back
of the dryer in the middle top selection. The function
of the control and relay panels is to compile signals
from the computer or the incoming voltage and transfer
the signals to the motor and heat circuit, when the
computer executes these various signals.
C. COIN BOX
The coin box assembly is located below the belt and
right coin panel. It is a good size triangular box. When
a coin passes the acceptor, the optic switch sends a
signal to the computer and the coin then falls in the
coin box.
9
D. DOOR SWITCH (HINGE BLOCK)
The main door switch is located behind the main door on the right hand
side. When the main door is opened, the switch will also open, preventing
the dryer from operating. The main door switch is a safety device and
should never be disabled.
E. MICROPROCESSOR ASSEMBLY
The microprocessor board is the latest Phase 5 controls.
It monitors the dryer functions ALL the time. Indicator
light emitting diode (L.E.D.) is mounted on the board to
help with servicing of the dryer.
F. BASKET (TUMBLER)
The basket (tumbler) consists of three (3) ribs and a perforated basket
(tumbler) along with a front and back, which are riveted together as an
assembly. The basket (tumbler) also consists of pop rivets, which attach
the basket (tumbler) to the drive system in the rear. The felt collar
helps to keep lint from accumulating behind the basket (tumbler).
G. BASKET (TUMBLER) AND DRIVE MOTOR ASSEMBLY ARRANGEMENT
The basket (tumbler) and the drive motor arrangement
are located (viewing from the front of the dryer)
approximately at the rear right side of the dryer. The
arrangement consists of an idler pulley, drive motor,
and basket (tumbler), which serve to adjust, drive,
and support the basket (tumbler). The idler assembly
has various nuts and bolts that are made to adjust the
belt tension.
10
H. IDLER ARM AND IMPELLOR MOUNT ASSEMBLY
The idler assembly is located in the back of the dryer, which is attached to the drive motor assembly. The main
purpose of the idler assembly is to reduce the speed of the motor, in turn increasing the torque of the basket
(tumbler) pulley.
I. DRIVE MOTOR AND IDLER PULLEY ARRANGEMENT
The dryer has a different kind of drive system. There is one (1) motor pulley, one (1) drive belt and an idler arm
assembly by the basket (tumbler). The drive motor drives the belt that rotates the basket (tumbler).
J. TEMPERATURE SENSORS
The temperature sensor used in a transducer converts heat into microamps, that the computer board then uses
to calculate the temperature.
11
K. GAS BURNER
The gas burner assembly consists of two (2) burner
tube orifices (the orifice has a hole in it to allow
gas to flow through). The hole size varies with
different elevation Btus, gas valve (which can be
up for natural or liquid propane [L.P.]), and a
flame-probe assembly.
L. SAIL SWITCH
The sail switch consists of a round damper
plate on a lever arm, which acts like an
actuator for a microswitch. When the air
blower comes on, it draws air through the
burner. This creates a negative pressure inside
the burner box, and this negative pressure pulls
in the round damper, which activates the sail
switch. If there is improper airflow, the
damper will not pull in, preventing the burner
from coming on.
Improper airflow can be caused by improperly designed exhaust ducting, where the duct run is too long or has
too many sharp bends on it. It can also be caused by a lack of make-up air or any obstruction such as back draft
damper sticking or lint build up. The sail switch is located in the back of the burner.
M. HI-LIMIT THERMOSTAT
The burner hi-limit thermostat is another safety device
that we use on the dryer. The hi-limit is located in
the burner area. The hi-limit thermostat cuts off the
heat if the temperature should reach 290° or higher.
Under normal conditions, the only way this device
would shut off the heat is when the airflow changes
to the extent of causing the intense heat from the
burner to trip the thermostat.
12
N. LINT DRAWER SWITCH
The lint drawer switch is located under the basket
(tumbler) on the right side. It is another added safety
device that stops the operation of the dryer, when
the lint drawer is opened. This device and the door
switch are the two (2) safety switches designed to
halt the basket (tumbler).
O. LINT DRAWER
The lint drawer is located under the baskets
(tumblers) of each pocket. It is a fairly large drawer
that is designed to be right in the main path of the
airflow, to catch any lint that happens to come out of
the articles being dried.
P. FRONT THRUSTER WHEEL
BRACKET ASSEMBLY
Behind the front panel for each pocket, there are
two (2) basket (tumbler) drive wheels. This supports
the weight of the basket (tumbler). This also allows
the basket (tumbler) to spin freely without bearings
and basket (tumbler) support shaft.
13
Q. REAR BASKET (TUMBLER) DRIVE WHEELS
There is a left and right basket (tumbler) drive wheel bracket assembly. This allows the basket (tumbler) to spin
freely without bearings or basket (tumbler) support shaft.
R. ROTATIONAL SENSOR ASSEMBLY
The Rotational Sensor Assembly is located in the rear of the dryer. It consists of a magnet and a rotational
switch, which is mounted to the sail switch/rotational sensor bracket.
The magnetic rotational sensor switch senses the rotation of the basket (tumbler). If the gap between the sensor
switch and the magnet is greater than a preset amount, then the dryer will shutdown on “SEFL” (“rotational
sensor failure”).
14
SECTION V
SERVICE
A. INTRODUCTION
ALL electrical or 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 an untrained person
making repairs. Service work should be performed by competent technicians in accordance with local, state,
and federal codes.
When contacting the factory for assistance, always have the dryer model number and serial number available.
CAUTION: Observe ALL safety precautions displayed on the dryer or specified in this manual before
and while making repairs.
The information provided will help isolate 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 suspected component itself. Electrical parts
should always be checked for failure before being returned to the factory.
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.
B. CONTROLS (COMPUTER)
TO REPLACE COMPUTER
1. Disconnect power to the dryer.
2. Open coin panel (one [1] lock in the center
of the coin panel).
3. Disconnect the display harness from the computer board (push the two [2] tabs on the side of the connector
outwards).
4. Disconnect the optic switch harness from the computer (squeeze the tabs on the side of the connector).
15
5. Disconnect the keyboard (touch pad) connector from the computer board keyboard (touch pad) harness
(simply pull straight out).
6. Disconnect the 9-pin main computer harness from the computer (squeeze the one [1] tab on the connector
and pull straight back).
7. Disconnect the green ground wire from the computer board.
8. Remove the two (2) Phillips head screws that secure the computer to the panel. Remove the board from
the panel by pulling at the corners of the board.
9. Replace in the reverse steps of the above.
10. Reestablish power to the dryer.
NOTE: Use caution when handling the microprocessor controller (computer) as it can be easily
damaged by static electricity.
TO REPLACE KEYBOARD (TOUCH PAD)
1. Discontinue power to the dryer.
2. Open the coin panel and disconnect the
keyboard (touch pad) ribbon connector from
the ribbon cable it is plugged into.
3. Peel the keyboard (touch pad) from the front
of the control panel taking care to avoid
scratching the panel.
4. Clean any adhesive residue from the panel.
5. Peel off paper backing from new keyboard (touch pad).
6. Align the display window on the keyboard (touch pad) with the cutout in the control panel and press in
place.
7. Connect keyboard (touch pad) ribbon to the board and reconnect power to the dryer.
8. Test for operation by pressing each temperature selection.
TO REPLACE COIN ACCEPTOR
1. Discontinue power to the dryer.
2. Open the coin panel.
3. Remove the four (4) 3mm nuts holding the coin acceptor to the panel.
4. Unplug optic switch harness connector.
5. Pull coin acceptor out gently.
6. Reverse procedure for installing new acceptor.
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