American Dryer Corp AD-840 User Manual
AD-840
Electrical Troubleshooting
Manual
1998
American Dryer Corporation
88 Currant Road
Fall River, MA 02720-4781
Telephone: (508) 678-9010 / Fax: (508) 678-9447
E-mail: techsupport@amdry.com
010998WS/tf
ADC Part No. 182731
Retain This Manual In A Safe Place For Future Reference
American Dispensing Company 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.
WARNING:
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.
UNDER NO CIRCUMSTANCES should the door switch or the heat circuit devices
ever be disabled.
Important
For your convenience, log the following information:
DATE OF PURCHASE MODEL NO.
DISTRIBUT ORS NAME
Seria l Nu mber (s)
AD-840
Replacement parts can be obtained from your distributor 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 orders directly to the
ADC Parts Department at (508) 678-9010. 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.
IMPORTANT
YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC
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
AD-840. WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS
OPERATION.
FOR YOUR SAFETY
THE SYSTEM IS SHIPPED WITH A PRESERVATIVE SOLUTION MADE
OF SODIUM BISULFITE AND (IN THE WINTER MONTHS) GLYCERINE.
MAKE SURE THE SYSTEM IS THOROUGHLY PURGED BEFORE LET-
TING ANYONE DRINK THE DISPENSED WATER.
REFER TO THE INSTALLATION SECTION ON PURGING PROCEDURE.
CAUTION
Never look directly into the unprotected parts of the U.V. chamber when there
is power to the sterilizer. Serious burns to the eyes and the skin may result.
Always unplug power to the sterilizer before working on it.
IMPORTANT
Please observe all safety precautions displayed on the equipment and / or specified
in the installation / operators manual included with the AD-840.
IMPORTANT
The wiring diagram for the water vending machine is located behind the coin
control door.
Water vending machine(s) must not be installed or stored in an area where it
will be exposed to water and / or weather.
Table of Contents
MICROPROCESSOR FAILURE CODES ....................................................................................... 2
1. Flow Meter ....................................................................................................................................... 2
2. R.O. Filter......................................................................................................................................... 2
3. Filter ................................................................................................................................................. 2
4. Overflow ........................................................................................................................................... 2
5. Use Other Side ................................................................................................................................. 2
6. Changer Unplug ................................................................................................................................ 2
7. System Refill Please Wait ................................................................................................................... 2
8. System Purge Do Not Drink .............................................................................................................. 3
ELECTRICAL PROBLEMS ASSOCIATED with MICROPROCESSOR FAILURE CODES .... 4
1. Flow Meter Error .............................................................................................................................. 4
2. R.O. Filter Error................................................................................................................................ 6
3. Filter Error ........................................................................................................................................ 7
4. Overflow Error .................................................................................................................................. 8
A. U.V. Light ................................................................................................................................. 8
B. Base Float Switch ..................................................................................................................... 9
C. Containment Tank Overflow Switch ........................................................................................... 9
D. Vending Bay Tank Overflow Switch ......................................................................................... 10
5. Changer Unplug Error ..................................................................................................................... 11
6. System Refill Please Wait ................................................................................................................. 12
PUMP MOTORS .............................................................................................................................. 12
1. Dispensing Pump Motor .................................................................................................................. 12
2. Drain Pump Motor .......................................................................................................................... 13
3. 3/4 hp Motor .................................................................................................................................. 14
ELECTRICAL COMPONENT LIST .............................................................................................. 15
MICROPROCESSOR FAILURE CODES
The microprocessor continually monitors the machine operation. When an error occurs the machine will display
a variety of failure codes, which will lead the service technician to the potential problem. The messages displayed
do not pinpoint the problem within the wiring of the machine. However, they will indicate one or more possible
failures. Reference to the wiring diagram is necessary.
The possible OUT OF ORDER failure codes will consist of the following:
1.
FLOW METER ... this failure indicates the machine has a dispensing problem. The microprocessor did
not detect a flow of water on either side (refer to Item #1 on
R.O. FILTER ... this failure indicates the R.O. membrane filter is in need of service, or may signify
2.
a problem with the R.O. comparator. (refer to Item #2 on
3.
FILTER ... this failure can indicate a variety of problems: (refer to Item #3 on page 7)
a. Sediment and/or carbon filters are in need of replacement.
b. High pressure switch has been triggered.
page 4).
page 6)
c. Supply water is continuously less than recommended installation specifications.
OVERFLOW ... this failure can indicate a variety of problems: (refer to Item #4 on page 8)
4.
a. U.V. light has failed and is in need of service.
b. Base float switch has been triggered.
c. Tank overflow float switch has been triggered.
d. Vending bay tank overflow switch has been triggered.
e. Relay board failure.
5.
CHNGR UNPLUG ... this failure indicates there is a problem communicating with the coin changer.
(refer to Item #5 on
6.
SYSTEM REFILL PLEASE WAIT ... this message indicates the water in the containment tank is low
page 11)
and is in the process of being refilled. The message will
automatically be reset when the system has enough water to
cover the maximum amount of water that can be dispensed in
one purchase. (refer to Item #6 on
page 12)
2
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