Sterling SDAA 25-100 specifications Check resin manufacturer’s data

Page 51

 

Problem

 

Possible cause

 

Corrective action

 

 

 

 

 

 

 

 

 

 

 

Check resin manufacturer’s data

 

 

 

Process temperature set too high

 

sheet for proper drying

 

 

 

 

temperature. Make sure plant

 

 

 

due to operator error.

 

personnel are aware of the

 

 

 

 

 

correct process temperature set

 

 

 

 

 

point.

 

 

 

High temperature alarm not set

 

Reset high temperature alarm.

 

Material in drying hopper cakes,

 

properly.

 

 

 

 

 

 

or meltdown occurs.

 

Process set point is out of

 

Restore temperature controller

 

 

 

acceptable range.

 

to factory pre-sets.

 

 

 

Function set for degrees Celsius

 

Verify correct Celsius or

 

 

 

(ºC), set point at degrees

 

 

 

 

 

Fahrenheit settings.

 

 

 

Fahrenheit (ºF).

 

 

 

 

 

 

 

 

 

Process thermocouple not in

 

Verify that the thermocouple is

 

 

 

 

properly installed in the inlet

 

 

 

airflow.

 

 

 

 

 

tube.

 

 

 

 

 

 

 

 

Burned out regeneration heater.

 

Repair or replace.

 

 

 

Contaminated or worn out

 

Replace.

 

 

 

desiccant.

 

 

 

 

 

 

 

 

 

Leaking process air hoses.

 

Repair or replace.

 

Poor dew point performance.

 

Dryer operates beyond its

 

Check dryer and drying hopper

 

 

capacity.

 

sizing.

 

 

 

 

 

 

 

Bad dew point sensor.

 

Replace.

 

 

 

Fouled dew point sensor

 

Clear obstruction. Air should

 

 

 

manifold.

 

flow freely through sensor.

 

 

 

Dirty filter.

 

Clean or replace filter element.

 

 

 

The internal mechanism is not

 

Properly insert the internal

 

 

 

inserted properly into the

 

 

 

 

 

mechanism into the housing.

 

 

 

housing.

 

 

 

 

 

 

 

 

 

The power supply is not

 

Properly connect the power

 

 

 

connected to its terminals

 

supply to the power supply

 

Nothing displays when the

 

properly.

 

terminals.

 

 

No power is supplied, or the

 

Supply a voltage of 85 to 125

 

controller is turned on.

 

 

 

 

supplied power is not within the

 

VAC to the power supply

 

 

 

 

 

 

 

specified range.

 

terminals of the controller.

 

 

 

Disconnect switch or Control

 

Check control power fuse for

 

 

 

 

continuity. Turn disconnect

 

 

 

Power switch not set to ON.

 

 

 

 

 

switch and control power switch

 

 

 

Control Power fuse blown.

 

 

 

 

 

ON.

 

 

 

 

 

Dehumidifying Dryers

Chapter 6: Troubleshooting

50 of 59

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Page 50 Page 52
Contents Sdaa 25-100 15-60 cfm Dehumidifying Dryers Shipping Information Table of Contents Maintenance Service Department Sales Department Contract Department Safety How to Use This ManualSafety Symbols Used in this Manual Wear Safety Glasses and Work Gloves General Responsibility ResponsibilityRemember Operator ResponsibilityReporting a Safety Defect Maintenance ResponsibilityDehumidifying Dryers Safety Functional Description Models Covered in This ManualGeneral Description Electrical Features Standard FeaturesWhat is desiccant? Mechanical FeaturesSafety Devices and Interlocks Controller FeaturesOptions Safety Circuit Standards Safety Device Lock-OutsFail Safe Operation Installation Uncrating the EquipmentRigging and Placing the Dryer Machine-Mount Dryer Dimensions Floor-Mount Dryer Dimensions Recommended Dryer Lifting Hardware Suggested Lift Rigging for Cart Mounted DryersSuggested Lift Rigging for Machine Mounted Dryers Electrical ConnectionsMaking Dryer/Drying Hopper Process Air Connections Setup ProceduresThree-Phase Models Checking for Proper Blower RotationInstalling Water Lines Hose and Hose Clamp Drying Hopper Air Trap ConsiderationsOptional Aftercooler Starting Up the Dryer Auto-Tuning the DryerInitial Start-up Pre-Startup ChecksShutting Down the Dryer Start-up OperationSwitches Indicator LightsController Description and Operation Process Air Temperature Controller Lit when Control Output 1 is on. The Out1Lit when Control Output 2 is on. Not used Setting the Process Air Temperature Indicator Name DescriptionLights in the Operation Indicator Section when Identifying Temperature Controller KeysE5CN Operating Parameters Tuned prior to dryer startup Adjustment Level Indicator Name DescriptionON, OFF Entering Operating Parameters to Select ModesSetting the High Dew Point Alarm Process Air Dew Point DisplayOptional Redundant Safety Controller Display Setting the Redundant Safety ControllerWatlow Operating Parameters Mode Parameter Setting range Default Manf. setting Dryer Operation Procedures Model Heating Cooling 15 cfm 30 cfm 60 cfm Page Controller Operation With Optional Alarm Horn & Reset Button Page Alarm Display Messages Shutting Down the Dryer Auto-Tuning the DryerMaintenance Preventative Maintenance SchedulePhotocopy this page for your maintenance records Vacuuming Preventative MaintenanceRecommendations for Cleaning and Replacing Filters Servicing Process Air FiltersServicing the Dew Point Monitor Cleaning with Compressed AirSymptoms of Worn Desiccant Corrective MaintenanceReplacing Worn Desiccant First AIDConsult local disposal regulations for more information Replacing the Process Heater ProceduresTroubleshooting Problem Possible cause Corrective actionIntroduction Problem Possible cause Corrective action Check resin manufacturer’s data Determining Temperature Controller Errors or Sensor Errors Using a ThermocoupleUsing a Platinum Resistance Thermometer Appendix WarrantyWarranty Specifications Warranty RestrictionsWarranty Liabilities Optional ComponentsCustomer Responsibilities Annex B Information Technical SpecificationsAftercooler Design Specifications Drawings and Diagrams Spare Parts ListLevel 2 & 3 Spare Parts List Electrical & Mechanical Returned Material Policy Safety Tag InformationWarranty Returns Dryer Safety TagsLocated on back of Dryer Dryer Identification Serial Number TagSales Department Service DepartmentTechnical Assistance Parts Department
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