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American Dryer Corp. AD-840 manual

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Table of contents for the manual

  • Page 1

    AD-840 Electrical Troubleshooting Manual 1998 American Dryer Corporation 88 Currant Road Fall River , MA 02720-4781 T elephone: (508) 678-9010 / Fax: (508) 678-9447 E-mail: techsupport@amdry .com ADC Part No. 182731 010998WS/tf[...]

  • Page 2

    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. OBSER VE ALL S[...]

  • Page 3

    IMPOR T ANT YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPL Y BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING, ADJUSTING, INST ALLA TION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational Safety and Health Administration) ST ANDARDS. Never look directly into the unprotected parts of the U.V . chamber when t[...]

  • Page 4

    IMPOR T ANT The wiring diagram for the water vending machine is located behind the coin control door . W ater vending machine(s) must not be installed or stored in an area where it will be exposed to water and / or weather . IMPOR T ANT Please observe all safety precautions displayed on the equipment and / or specified in the installation / operato[...]

  • Page 5

    T able of Contents MICROPROCESSOR F AILURE CODES ....................................................................................... 2 1. Flow Meter ....................................................................................................................................... 2 2. R.O. Filter ............................................[...]

  • Page 6

    2 MICROPROCESSOR F AILURE 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 on[...]

  • Page 7

    3 7. SYSTEM PURGE DO NOT DRINK . .. this message will appear upon turn on of the machine. It is not actually a failure but an installation safeguard. This routine will flush out the preservatives that keep the R.O. Membrane contaminant free during storage. The flushing will be accomplished by dispensing water for an extended period of time which wi[...]

  • Page 8

    4 ELECTRICAL PROBLEMS ASSOCIA TED with MICROPROCESSOR F AILURE CODES 1. FLOW METER ERROR The Flow Meter error message could be the result of the following: a . Flow meter failure. 1) Flow meter sensor may need replacement. 2) Flow meter housing may need replacement. b . A disconnected plug on the microprocessor panel. c . Failures with the dispensi[...]

  • Page 9

    5 NOTE: When a complete flow meter is changed some reprogramming is required. The machine is relying on the information provided by the flow meter for accurate vending. The counts per gallon in the program will have to be changed along with the flow meter . If just the sensor element is replaced, the recalibration may not be necessary . T o set jus[...]

  • Page 10

    6 e . Press and hold the [4 GAL.] selection key to activate the vending bay . f . When the gallon has filled completely , release the key . g . Press the [2 GAL.] selection key . This is necessary to retain the information in memory . NOTE: After the counts have been derived the microprocessor will not override the previous values that are stored i[...]

  • Page 11

    7 3. FIL TER ERROR The Filter Error message could be a result of the following: a . The sediment and/or carbon filters are in need of replacement; Monitor the pressure gauges while the machine is in operation. Determine which filter has a 10 P .S.I. differential pressure while the R.O. pump is running. b . The high pressure switch has been triggere[...]

  • Page 12

    8 4. OVERFLOW ERROR A. U.V . Light An Overflow Error triggered by the U.V . Light could be a result of the following: a . The U.V . Light is not plugged in. b . The U.V . Light is defective. c . The alarm connection to the relay board is not plugged in. d . The alarm on the U.V . Light has been triggered. The bulb is not at the correct intensity an[...]

  • Page 13

    9 B. Base Float Switch An Overflow Error triggered by the Base Float Switch could be a result of the following: a . The Base Float Switch has been disconnected. b . The Base Float Switch has been triggered due to water flood in cabinet. c . The Base Float Switch has failed. d . The relay board has failed. C. Containment T ank Overflow Switch An Ove[...]

  • Page 14

    10 D. V ending Bay T ank Overflow Switch An Overflow Error triggered by the V ending Bay Overflow Switch could be a result of the following: a . The V ending Bay Overflow Switch is disconnected. b . The V ending Bay Overflow Switch has been triggered due to water not draining out of the tank. c . The V ending Bay Overflow Switch has failed. d . Unp[...]

  • Page 15

    11 5. CHNGER UNPLUG ERROR The CHNGER UNPLUG Error message could be a result of the following: a . Coin changer is unplugged. b . Defective coin changer . c . Defective power supply . Coin Changer Microprocessor Panel Power Supply Photo0037 Photo0036 Photo0019[...]

  • Page 16

    12 6. SYSTEM REFILL PLEASE W AIT The System Refill Please W ait message could be a result of the water level in the containment tank is below the low level switch. If the machine is functioning correctly it should be refilling. The message will automatically reset 1 minute after the water level has reached the low level switch. A System Re[...]

  • Page 17

    13 2. DRAIN PUMP MOTOR An inoperable drain pump could be a result of the following: a . Clogged drain b . Unplugged spill switch c . Incorrect positioning of the spill switch. d . Mechanical malfunction of the drain check valve. When the spill switch is changed it is important that it is positioned correctly . Incorrect positioning will change the [...]

  • Page 18

    14 3. 3/4 HP MOTOR An inoperable drain pump could be a result of the following: a . No water supply to machine b . Unplugged or defective low and/or high pressure switches c . Defective inlet solenoid d . Defective relay board e . Defective motor contactor f . Defective 3/4 HP motor g . Defective inlet water solenoid Photo0038[...]

  • Page 19

    15 ELECTRICAL COMPONENTS LIST ADC Part No. Description 123000 Indicator Light - 1 15 V AC 123005 Indicator Light - 24 V AC 182455 120/240V Primary 24 V AC Secondary 150 V A 132451 Contactor - 24 V AC 133356 Power Cord - 120 V A C 137060 Arc Suppressor (A.S.) Board 182000 Keypad Label 182010 Display Board 182012 Ribbon Connector 182025 Microprocesso[...]

  • Page 20

    ADC 182731 1 - 02/25/98-25[...]