Sterling SDA AP-1 specifications Alarms, Alarm Descriptions

Page 54

5-3 Alarms

Use the Alarm History screen to monitor system alarms. From the Main Menu screen, press the Alarms button to access the Alarm History screen. The three most recent alarms appear at the top of the Alarm History screen. Use the DOWN and UP buttons to scroll through the alarms.

(Alarm History Screen)

5-4 Alarm Descriptions

	Alarm	Alarm	Alarm
	Comment	Description	Effect
	VALVE	The Main Air Valve did not maintain	Immediate
		position.
	POSITION		Shut Down
		Possible Motor or Limit Switch Failure.

	VALVE	The Main Air Valve did not find	Immediate
	MTR	position.
			Shut Down
	OVERRIDE	Possible Motor or Limit Switch Failure.

	VALVE	The Main Air Valves expected and actual	Immediate
	MOTOR FAIL	positions do not match.	Shut Down
		Possible Motor or Limit Switch Failure.

	PROCESS	The process supply air temperature	Process
		thermocouple is out of range.
	SENSOR FAIL		Shut Down
		Possible thermocouple failure.

	REGEN	The regeneration air temperature	Regeneration
		thermocouple is out of range.
	SENSOR FAIL		Shut Down
		Possible thermocouple failure.

	PROCESS	Process air temperature deviation is	Process
		above high limit value.
	HIGH TEMP		Shut Down
		Possible solid state relay failure.

	PROCESS	Process air temperature deviation is
		below low limit value.	Alert Only
	LOW TEMP
		Possible heater failure.

		Process air temperature control loop is
	PROCESS	unable to maintain the process air	Process
		temperature set point.
	LOOP BREAK		Shut Down
		Possible Missing thermocouple, Failed

		heater, Failed solid state relay.
	REGEN	Regeneration air temperature deviation is	Regeneration
	HIGH TEMP	above high limit value.	Shut Down

Large Dehumidifying Dryers

Operation

54

Image 54

Contents SDA Large AP-1 Control Dehumidifying Dryer Event of Shipping Damage Shipping InfoUnpacking and Inspection If the Shipment is Not CompleteReturns Table of Contents Operation Troubleshooting Safety How to Use This ManualSafety Symbols Used in this Manual Dryer Safety Tags Description Responsibility General ResponsibilityOperator Responsibility Maintenance Responsibility Reporting a Safety Defect Functional Description Models Covered in This ManualGeneral Description Process/Regeneration Cycle Sequence of OperationMechanical Features Standard FeaturesAuto Start Timer Electrical FeaturesOptions Dewpoint ExtendClosed-Loop Regeneration Drawings and Diagrams Optional dryer dust collector Aftercooler Design Specifications Process AftercoolerProcess Air Dust Collector Process Air Dust Collector Recommended Temperature Settings Material Overdrying ProtectionMechanical Options Electrical OptionsController Options Safety Device Lock-Outs Safety Devices and InterlocksSafety Circuit Standards Fail Safe OperationPage Dimensions and Specifications Denotes availability Mechanical Options Denotes availabilityDenotes availability Rigging and Placing Unit Mechanical InstallationUncrating the Equipment Making Electrical ConnectionsMaking Gas Line Connections Gas-Fired Models Only DescriptionChecking for Proper Blower Rotation Checking Blower RotationMaking Dryer/Drying Hopper Process Air Connections Dryer/Drying Hopper Process Air ConnectionsProcess Air Heater on Drying Hopper Large Dehumidifying Dryers Mechanical Installation Connecting Aftercooler/Precooler Cooling Water Optional Aftercooler Components & Flow RatesUsing the Drying Hopper Air Trap Drying Hopper Air TrapControls Controller DescriptionProcess Air Temperature and Conveying Process Controller Dryer Status Screen Startup ScreenDryer Alarms Help System LOG OFF Identifying Controller ScreensMain Menu Screen Setting Values Dryer Status Dryer Setup Over DRY Protect Alarms Auto Tune Dryer MenuAuto Start Main Menu Dryer Setup Screen 2 Dryer Setup Screen 3Dryer Setup Screen 4 Overdry Protection Overdry Protection Screen 1Overdry Protection Screen 2 Alarm History Screen AutotuneProcess AutoTune Screen Autostart Timer Screen DEW Point SetupDew Point Setup Screen Auto StartHelp Menu Screen System Setup SET Clock Hour Meters Alarm History StatusHelp Menu System MenuSystem Backup Service Menu Main Menu System Setup System Setup ScreenLOW Level Detection Setup Clock Menu Screen Autostart Clock ScreenInput Status Screen Hour Meter ScreenInput Status Output StatusSystem Backup Screen ServiceService Menu Screen Alarm Screens Redundant Safety Controller Display Alarm Screen ExampleSetting the Redundant Safety Controller Always put your set point to 30F above set pointLarge Dehumidifying Dryers Controls Operation Start-upUsing the Dryer Status Screen Alarms Alarm DescriptionsShutdown Maintenance Maintenance SchedulePhotocopy this page for your maintenance records Preventative Maintenance Cleaning or Replacing the Process Air FiltersCleaning or Replacing the Regeneration Filter Calibrating the Dirty Filter AlarmChecking the Dewpoint Control System Corrective Maintenance Symptoms of Worn Out DesiccantReplacing the Desiccant Desiccant Tower Assembly Replacing the Process Heater Electric DryersProcess Heater Box Assembly Replacing the Regeneration Heater Electric DryersRegeneration Heater Box Assembly Troubleshooting Basic TroubleshootingIntroduction Large Dehumidifying Dryers Troubleshooting Determining Temperature Controller Errors or Sensor Errors Using a ThermocoupleUsing a Platinum Resistance Thermometer Returned Material Policy Warranty ReturnsAppendix Credit ReturnsTechnical Specifications Annex B InformationSpare Parts List Level 3 Mechanical Components Dryer Identification Serial Number Tag Located on back of DryerParts Department Service DepartmentTechnical Assistance Sales Department