American Dryer Corp MLG-460 manual Base Section Electrical Malfunctions, Front Door Switch

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D. BASE SECTION ELECTRICAL MALFUNCTIONS

Introduction

There are four (4) electrical components associated with the dryer’s base section. These components are interfaced to a junction box, and connect to the main electrical enclosure through a disconnect cable. The “Base Junction Box” is located on the right rear of the base section, and title of its wiring diagram is “ML-460 Base Electrical Junction Box Wiring Diagram.” The base section electrical components provide:

•Tumbler position information (Front Up - Level Rear Up)

•Lint chamber pressure information

•Lint screen mechanism functioning OK information

The following information will provide a means to respond to “Base” associated fault messages, and to verify all the electrical signals associated with the base section. Refer to the Base Junction Box for detailed wiring diagram.

1.Front Door Switch

The “front down sensing switch” is located on the left side of the dryer base and comprises of four (4) parts: head, arm, body, and cord grip device. The head is a rotating type, with a roller arm attached for switch actuation. The body contains a double-pole-double-throw (DPDT), normally opens switch. LS1 - has two (2) electrical functions, A and B.

“A” provides a “front down” signal to the PLC (Programmable Logic Controller) “B” is used as an electrical interlock to the “Rear Up Signal”

2.Rear Down Switch - LS2

The “rear down sensing switch” is located on the left side of the dryer base, and comprises of four (4) parts: head, arm, body, and cord grip device. The head is rotating type, with a roller arm attached for switch actuation. The body contains a double-pole-double-throw (DPDT), normally open switch. LS2 - has two (2) electrical functions, A and B.

“A” provides a “rear down” signal to the PLC (Programmable Logic Controller)

“B” is used as an electrical interlock to the “Front Up Signal”

3.Lint Drawer Proximity Switches

The “Lint Drawer Proximity Switches” are located on the left side of the dryer base, and comprises of six

(6)parts: Junction Box, two (2) proximity switches, and three (3) cord grip switches. The switches sense a magnet installed on the lint draws that verify that ALL safeties are met to the Burner Controller and also signal the PLC (Programmable Logic Controller) that enables the dryer to begin a drying cycle.

NOTE: Front Lint Drawers and Rear Lint Drawer are not interchangeable.

“B” is used as an electrical interlock to the PLC’s (Programmable Logic Controller’s) 110 VAC output power.

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Contents MLG-460 Retain This Manual In a Safe Place For Future Reference For Your Safety Page Table of Contents Troubleshooting TOC Service PartsReturning Warranty Cards Parts Returning Warranty Parts Section Safety Precautions What to do if YOU Smell GASPage Specifications SpecificationsSpecifications Installation Procedures Reassembly of DryerPage 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 PRE START-UP Preparation for OperationRoutine Maintenance CleaningMonthly 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 Service PartsReturning Warranty Parts Returning Warranty CardsWarranty Page Troubleshooting Probable Causes Power MalfunctionsPossible Solutions 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 General Description Unless the Water Valve to the Sprinkler is ClosedIntroduction Burner Controller Input Signal ComponentsBurner Ignition Burner Section Input Circuit Component DescriptionLoad Door Switch DS1B Output Signal Component Description Stop Detector Relay Contact SMD noGAS 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 Malfunctions Tumbler Basket Section Electrical ComponentsFollowing is for 2-Door Models only Rear Panel Control Problems Probable Causes Possible Solutions Unload 1 Selection Probable Causes PLC OUT PIN 7 = Unload Door Open PLC OUT PIN 10 = Front UPDoor Open Problem Drum Fault Message Malfunction Probable Causes Page Lint Drawer Proximity Switches Front Door SwitchRear Down Switch LS2 Base Section Electrical MalfunctionsProbable Solutions Lint Chamber Pressure Switch PS3Tumbler Basket Tilt Problems Level Fault Page Lint Screen Mechanism Problem Screen Fault Lint Chamber Air Pressure Problem AIR Fault Pendant Control Malfunctions Pendant Electrical ComponentsVerify Pendant Electrical Signals ML-460 Pendant Assembly Diagram Temperature Sensing Page Temperature Measurement and Sensing Problems Circuit Wiring to the Analog Input Module MotorsMotor Actuation Problems Probable Causes Motor Protection Device DescriptionsGAS Fault Screen FaultMotor Fault AIR Fault
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