American Dryer Corp MLS-460 manual PLC OUT PIN 7 = Unload Door Open PLC OUT PIN 10 = Front UP

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•Shut power off at the main breaker and remove the rear panel and check switches using an OHM meter; replace if defective

3)Wiring back to the main electrical enclosure

•With the control voltage “ON” Front Panel “green” Button

•Select “1” on the “O UNLOAD” switch located on the rear control panel. Does PLC (Programmable Logic Controller) IN PIN 19 = UNLOAD, REAR PANEL light?

•If “YES,” refer to section 3a

•If “NO,” refer to section 3b

3a) The L.E.D. (light emitting diode) “ON” on the PLC (Programmable Logic Controller) indicates are also illuminating when the “O UNLOAD 1” selector switch is on “1.”

PLC OUT PIN 7 = UNLOAD DOOR (OPEN)

PLC OUT PIN 10 = FRONT UP

•If output indicators are functional, however the UNLOAD DOORS of FRONT UP commands are not executed correctly:

•Check wiring on the MAIN ENCLOSURE PANEL (Refer to the MLS-460 Main Panel Wiring Diagram)

•Check wiring associated with Solenoid Junction Box.

•Refer to troubleshooting procedures associated with the Solenoid Junction Box.

3b) Input 19 L.E.D. (light emitting diode) not illuminating correctly on the PLC (Programmable Logic Controller) indicates that the signal to the PLC input is missing or the PLC is defective.

•Check FUSE 2 on the main electrical panel

•Check wiring back to the tumbler (basket) junction box

•Check wiring back to the rear controls

•Check PLC

•Refer to the blueprints

•Main electrical panel diagram

•Tumbler junction box wiring PLC (Programmable Logic Controller) diagram

•Rear panel controls wiring diagram

•Retest; verify that the signal is operational

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Contents MLS-460 Installation/Operator’s Manual Retain This Manual In a Safe Place For Future Reference For Your Safety Page Table of Contents Power Malfunctions ServiceMotors Section Important InformationSafety Precautions Explosion could ResultPage SPECIFICATIONS/DIMENSIONS SpecificationsDimensions Reassembly of Dryer Installation ProceduresReattach The Control Pendant Arm Reassembly Instructions For Dryers Shipped In Three 3 Pieces Page Location Requirements Internal AIR, ELECTRICAL, and Water Connections Air Front Tilt Piston and Sprinkler LinesPage Temperature Probe, Base, and Tumbler Basket Disconnects Electric Tumbler Basket MotorsPage Pendant Tumbler Basket Junction Box Disconnect Left Drum MotorExternal Supply Connections Condensate return line must be 1-1/4 pipe Exhaust Ducting Page Electrical Requirements Electrical RequirementsLatest Edition Electrical Service Specifications MLS-460 SteamPage Fresh AIR Supply Requirements Steam Information Steam RequirementsShut Down Instructions PRE START-UP Preparation for OperationRoutine Maintenance CleaningSuggested Cleaning Schedule Clean any lint accumulation from inside the heat consoleMonthly Component System Descriptions Tumbler Basket Support and Drive SystemPage Page Main AIR Blower and Heat Reclaimer System Heat Reclaimer Adjustment Remove Electricity from the Unit Compressed AIR System Page Safety Devices Door Open Service SERVICE/PARTS InformationParts Warranty Information Returning Warranty CardsWarranty Returning Warranty PartsPage Troubleshooting Troubleshooting Table of Contents NumberVerify red Sprinkler Power on main panel to be illuminated Power MalfunctionsMain Disconnect Will Not Turn On If NO, refer to paragraph #1 above Machine Main Power Shuts Down Blue Indicator Off Sprinkler circuit may be defective3CR CRB Not Used Sprinkler Circuit ComponentsSprinkler Circuit Description Page Emergency Stop E-Stop Buttons 1, 2, Malfunctioning PLC Programmable Logic ControllerPage PLC Message HI-TEMP Fault General DescriptionPage Page Tumbler Basket Section Electrical Malfunctions IntroductionDrum Rotation Sensor PRS1 Rear Panel Control Problems Emergency Stop E-Stop Function If YES, refer to a If NO, refer to b PLC OUT PIN 1 = Drum Reverse PLC OUT PIN 2 = Drum Forward PLC OUT PIN 7 = Unload Door Open PLC OUT PIN 10 = Front UP Wiring Back the PLC Programmable Logic Controller DS1-B=LOAD Door Switch DS2-B=UNLOAD Door SwitchProbable Solutions Base Section Electrical Malfunctions Lint Drawer Proximity Switches Wiring Back to the PLC Programmable Logic ControllerPage Probable Causes Pendant Control Malfunctions Load Level Unload Tumbler Reverse Tumbler ForwardSEL a = Load SEL B = Unload Tumbler Reverse Pendant --- PB2Tumbler Forward Pendant --- PB1 Fuse 4 on Main Electrical Panel Faulty Switches Wiring Back to PLC Programmable Logic ControllerMLS-460 Pendant Assembly Diagram Wiring DiagramDisconnect Plug Faulty Switch Wiring Back to TB1 Temperature SensingAnother Emergency Stop E-Stop Button Temperature Sensing Component Descriptions Exhaust RTD Resistive Temperature Device Sens1With the control voltage OFF Circuit Wiring to the Analog Input Module MotorsVerify current setting Check circuit Check motor Retest LS-460 Idling LS-460 Running ADC113073 1- 01/14/00-15