American Dryer Corp MLG-460 manual

Page 43

2)L.E.D. (light emitting diode) and Neon Displays of the BCM (Burner Controller Module)

a)Operating Interlock - L.E.D. (light emitting diode) is lit when:

ALL safety interlock switches are closed applying a 120 VAC signal to terminal #7 of the burner controller module (BCM).

b)Operating Interlock - L.E.D. (light emitting diode) is not lit when:

One or more safety interlock switches are open. If any safety interlocks switch is open the burner ignition sequence will not be attempted.

c)Air Failure - L.E.D. (light emitting diode) is lit if:

•Air switch is not closed within 10 seconds of start-up of blower

•Air switch is open during firing cycle.

d)System Unsafe - L.E.D. (light emitting diode) is lit if:

•A dryer safety device, connected in series with terminal #7, is opened. These safety devices include the door switches, tilt switches, tumbler (basket) stop motion detector, high temperature limit switches, airflow switches, and high or low gas pressure switch.

•A loose connection on the flame rod or spark plug.

•ALL purge time dip switches are in the off position.

•Flame is detected out of sequence.

•Inductance (H) is detected on sensor wires.

•Wiring fault on terminal #3, terminal #4, and terminal #5.

•Internal controller failure.

•Air switch closed before start-up.

e)Flame Signal - L.E.D. (light emitting diode) is lit when:

The flame rod is in contact with the pilot flame and the BCM (burner controller module) converts a microampere (μ) current between the flame rod and ground into a 3 volt DC to 11 volt DC signal that can be measured on the BCM. Insert one (1) probe of a DC volt meter into the flame signal port and put the other probe to ground. The meter will read out the 3 volt DC to 11 volt DC flame signal. If the flame signal L.E.D. (light emitting diode) flickers on and off, this is a result of a weak flame signal which can be caused by an intermittent wiring connection between the flame rod and the BCM, a faulty ground connection, bad ground of the dryer, weak pilot flame, and dirty or defective flame rod.

f)Burner Controller Power On Indicator - Neon is lit when; Burner controller has its supply voltage of 120 VAC.

g)Burner for Air Switch Status Indicator - Neon is lit when;

Air switch is closed after start-up of the blower (fan) and the interlocks are ALL closed.

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Contents MLG-460 Retain This Manual In a Safe Place For Future Reference For Your Safety Page Table of Contents Returning Warranty Cards Parts Returning Warranty Parts Service PartsTroubleshooting TOC Section What to do if YOU Smell GAS Safety PrecautionsPage Specifications SpecificationsSpecifications Reassembly of Dryer Installation ProceduresPage Page Location Requirements Internal AIR, Electric and Water Connections Page Page Page Page Page Left Drum Motor External Supply Connections Page Page Electrical Requirements Electrical RequirementsMLG-460 Page Fresh AIR Supply Requirements Preparation for Operation PRE START-UPCleaning Routine MaintenanceMonthly Component System Descriptions Page Page Main AIR Blower and Heat Reclaimer System Page Compressed AIR System Page Page GAS Burner and Ignition System Switch #2 Intermittent Pilot Page Page Page Page Page Page Page Safety Devices Door Open Parts ServiceWarranty Returning Warranty CardsReturning Warranty Parts Page Troubleshooting Possible Solutions Power MalfunctionsProbable Causes No Control Power Blue Light Off Machine Main Power Shuts Down Blue Indicator Off 2CRB Sprinkler Circuit Description Page Front Panel Blue Light and RED Light on Possible Solutions Unless the Water Valve to the Sprinkler is Closed General DescriptionBurner Section Input Circuit Component Description Burner Controller Input Signal ComponentsBurner Ignition IntroductionLoad Door Switch DS1B Stop Detector Relay Contact SMD no Output Signal Component DescriptionGAS Fault Message gas system only Heater Fault Message Possible Solutions Page Page AIR Fault Message HI-TEMP Fault Message Possible Solutions Drum Fault Message Page Tumbler Basket Section Electrical Components Tumbler Basket Section Electrical MalfunctionsFollowing is for 2-Door Models only Rear Panel Control Problems Probable Causes Possible Solutions PLC OUT PIN 7 = Unload Door Open PLC OUT PIN 10 = Front UP Unload 1 Selection Probable CausesDoor Open Problem Drum Fault Message Malfunction Probable Causes Page Base Section Electrical Malfunctions Front Door SwitchRear Down Switch LS2 Lint Drawer Proximity SwitchesTumbler Basket Tilt Problems Level Fault Lint Chamber Pressure Switch PS3Probable Solutions Page Lint Screen Mechanism Problem Screen Fault Lint Chamber Air Pressure Problem AIR Fault Pendant Electrical Components Pendant Control MalfunctionsVerify Pendant Electrical Signals ML-460 Pendant Assembly Diagram Temperature Sensing Page Temperature Measurement and Sensing Problems Motors Circuit Wiring to the Analog Input ModuleMotor Protection Device Descriptions Motor Actuation Problems Probable CausesAIR Fault Screen FaultMotor Fault GAS Fault
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