Sterling 882.00291.00 specifications Troubleshooting, Introduction

Page 37

Chapter 6: Troubleshooting

6-1 Introduction

The utmost in safety precautions should be observed at all times when working on or around the machine and the electrical components. All normal trouble-shooting must be accomplished with the power off, line fuses removed, and with the machine tagged as out of service.

The use of good quality test equipment cannot be over-emphasized when troubleshooting is indicated. Use a good ammeter that can measure at least twice the AC and DC current that can be encountered for the machine. Be sure that the voltmeter has at least minimum impedance of 5,000 OHMS-per-volt on AC and 20,000 OHMS-per-volt on DC scales. Popular combination meters, VOM and VTVM can be selected to provide the necessary functions.

Before making haphazard substitutions and repairs when defective electrical components are malfunctioning, we recommend that you check the associated circuitry and assemblies for other defective devices. It is common to replace the obviously damaged component without actually locating the real cause of the trouble. Such hasty substitutions will only destroy the new component. Refer to wiring diagrams and schematics.

Locating mechanical problems, should they occur, is relatively straightforward. When necessary, refer to the parts catalog section.

Alarm Message

Cause

Corrective Action

Dryer Status

 

 

 

 

HIGH TEMP

The process

Make sure the process filter

- Dryer Shuts down:

 

temperature has

is clean. Clean or replace if

- Process blower OFF.

 

exceeded the alarm

necessary.

- Process heaters OFF.

 

set point.

 

- Regen heaters OFF.

 

Double check the alarm set

 

 

point.

- Alarm light is ON

 

The high temperature

 

snap switch of the

Check the positioning of the

- Alarm horn is ON.

 

process heater box

thermocouple inside the air

 

 

has tripped.

inlet of the drying hopper.

 

 

The tip of the thermocouple

 

 

 

 

 

 

should be centered to the

 

 

The high temperature

 

 

snap switch on of the

tube, and not touching any

 

 

regeneration heater

metal part of the tube.

 

 

boxes has tripped

The drying temperature set

 

 

 

point is lower than dryer

 

 

 

capabilities. Check the dryer

 

 

 

specs.

 

 

 

Make sure all the hose

 

 

 

connections are tight.

 

 

 

Make sure the regeneration

 

 

 

timing cycle matches the

 

 

 

specs. If not contact Service

 

 

 

department.

 

 

 

 

 

15, 30, & 60 cfm Compact Dryers

37

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Contents 15, 30, & 60 cfm Compact Dehumidifying Dryers Unpacking and Inspection Shipping InformationEvent of Shipping Damage If the Shipment is Not CompleteTable of Contents Maintenance How to Use This Manual SafetySafety Symbols Used in this Manual Wear Safety Glasses and Work Gloves Safety Tag InformationGeneral Responsibility ResponsibilityOperator Responsibility Remember Reporting a Safety Defect Maintenance ResponsibilityModels Covered in This Manual Functional DescriptionGeneral Description Mechanical Features Standard FeaturesElectrical Features Controller Features Safety Devices and InterlocksOptions Safety Device Lock-Outs Safety Circuit StandardsFail Safe Operation Uncrating the Equipment InstallationRigging and Placing the Dryer Suggested Lift Rigging for Cart Mount Dryers Suggested Lift Rigging for Machine Mounted Dryers Electrical ConnectionsChecking for Proper Blower Rotation Three-Phase Models Setup ProceduresInitial Start-up Installing Water LinesDrying Hopper Air Trap Considerations Optional AftercoolerShutting Down the Dryer Auto-Tuning the DryerIndicator Lights SwitchesOperation Controller Description and OperationProcess Air Temperature Controller Lit when Control Output 2 is on. Not used Lit when Control Output 1 is on. The Out1Indicator Name Description Lights in the Operation Indicator Section whenAdjustment Level Indicator Name Description Setting the Process Air TemperatureE5CN Operating Parameters Entering Operating Parameters to Select Modes Process Air Dew Point Display Setting the High Dew Point AlarmOptional Controller Operation Dryer Operation ProceduresAlarm Display Messages High Temp Valve MTR Preventative Maintenance Schedule MaintenanceRecommendations for Cleaning and Replacing Filters Preventative MaintenanceServicing Process Air Filters VacuumingCleaning with Compressed Air Corrective MaintenanceSymptoms of Worn Desiccant Servicing the Dew Point MonitorReplacing Worn Desiccant + First AID +Desiccant Bed Location and Disassembly Replacing the Process/Regeneration Heater ProceduresReplacement Procedures Replacing/Cleaning the Cooling CoilPage Introduction TroubleshootingProc Blwr Using a Thermocouple Determining Temperature Controller Errors or Sensor ErrorsAppendix Technical SpecificationsAftercooler Design Specifications Drawings and DiagramsHigh Heat Model 180F to 400F Air Flow Schematic Level 1 Spare Parts List Electrical & Mechanical Spare Parts ListHI-CORE Desiccant Dryer 15/30/60 CFM Units 30 CFM 60 CFM 120V Control Common Parts 220V Control Common Parts Dryer Identification Serial Number Tag Returned Material PolicyTechnical Assistance Service DepartmentParts Department Sales Department
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882.00291.00 specifications

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