Sterling SDA Series 25-100 15 cfm Determining Temperature Controller Errors or Sensor Errors

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Alarm Message	Cause	Corrective Action	Dryer Status

VALVE MTR	The limit switch on the	Limit switch may be out of	- Dryer Shuts down:
	valve may not have	position. Re-adjust the	- Process blower OFF.
	been wired correctly.	switch to make sure it trips	- Process heaters OFF.
	The valve has made	when it is at the high	- Regen heaters OFF.
	enough rotations and	position, and it does not	- Alarm light is ON
	the correct position of	touch the cam when it is at	- Alarm horn is ON.
	the valve was not	the low position.
	detected.	The switch is indicating the
		incorrect desiccant tank is in
		regeneration. Check the
		wiring of the switch against
		the wiring diagram. Make
		sure all the wire connections
		are tight.
		Limit switch may be faulty.
		Replace the switch and
		make sure the wires are
		connected correctly.

6-2 Determining Temperature Controller Errors or Sensor Errors

Using a Thermocouple

If the controller displays a temperature that is close to room temperature (70ºF/21ºC) when you short-circuit controller input terminals, the controller is normal and the sensor is probably broken, short-circuited, or incorrectly wired.

Other service problems or questions can be answered by contacting the Service Department.

15, 30, & 60 cfm Compact Dryers

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Contents SDA Series 15, 30, & 60 cfm Compact Dehumidifying Dryers If the Shipment is Not Complete Shipping InformationUnpacking and Inspection Event of Shipping DamageTable of Contents Maintenance Safety How to Use This ManualSafety Symbols Used in this Manual Wear Safety Glasses and Work Gloves Safety Tag InformationResponsibility General ResponsibilityOperator Responsibility Remember Reporting a Safety Defect Maintenance ResponsibilityFunctional Description Models Covered in This ManualGeneral Description Standard Features Mechanical FeaturesElectrical Features Safety Devices and Interlocks Controller FeaturesOptions Safety Circuit Standards Safety Device Lock-OutsFail Safe Operation Installation Uncrating the EquipmentRigging 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 ProceduresOptional Aftercooler Installing Water LinesInitial Start-up Drying Hopper Air Trap ConsiderationsShutting Down the Dryer Auto-Tuning the DryerController Description and Operation SwitchesIndicator Lights OperationProcess Air Temperature Controller Lights in the Operation Indicator Section when Lit when Control Output 1 is on. The Out1Lit when Control Output 2 is on. Not used Indicator Name DescriptionSetting the Process Air Temperature Adjustment Level Indicator Name DescriptionE5CN Operating Parameters Entering Operating Parameters to Select Modes Setting the High Dew Point Alarm Process Air Dew Point DisplayOptional Controller Operation Dryer Operation ProceduresAlarm Display Messages High Temp Valve MTR Preventative Maintenance Schedule MaintenanceVacuuming Preventative MaintenanceRecommendations for Cleaning and Replacing Filters Servicing Process Air FiltersServicing the Dew Point Monitor Corrective MaintenanceCleaning with Compressed Air Symptoms of Worn DesiccantReplacing 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 PolicySales Department Service DepartmentTechnical Assistance Parts Department