Graco A-25 Heater, See E04 Fluid Temperature Sen, Sor FTS or thermocouple discon

Page 19

Troubleshooting

Heater

PROBLEM	CAUSE	SOLUTION


	Heat turned off.	Press A or B zone
Primary heater(s) does not heat.		Press A or B zone
Primary heater(s) does not heat.		keys.
		keys.

	Temperature control alarm.	Check temperature display for diag-
		nostic code, page 9.

	Signal failure from thermocouple.	See E04: Fluid Temperature Sen-
		sor (FTS) or thermocouple discon-
		nected, page 11.

Control of primary heat is abnormal;	Dirty thermocouple connections.	Examine connection of thermocou-
high temperature overshoots or E01		ples to long green plug on heater
error occurs intermittently.		control board. Unplug and re-plug
		thermocouple wires, cleaning off any
		debris. Unplug and re-plug long
		green connector.

	Thermocouple not contacting heater	Loosen ferrule nut (N), push in ther-
	element.	mocouple (361) so tip (T) contacts
		heater element (358). Holding ther-
		mocouple tip (T) against heater ele-
		ment, tighten ferrule nut (N) 1/4 turn
		past tight. See page 30 for illustra-
		tion.

	Failed heater element.	See Primary Heater, page 28.

	Signal failure from thermocouple.	See E04: Fluid Temperature Sen-
		sor (FTS) or thermocouple discon-
		nected, page 11.

	Thermocouple wired incorrectly.	See E04: Fluid Temperature Sen-
		sor (FTS) or thermocouple discon-
		nected, page 11. Power up zones
		one at a time and verify that tempera-
		ture for each zone rises.

3A1570A

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Contents Repair-Parts Important Safety InstructionsContents Manual Description Proportioner ModelsSystems Related ManualsElectric Shock Hazard Fire and Explosion Hazard Equipment Misuse Hazard Important Two-Component Material Information Changing Materials Temperature Control Diagnostic Codes DataTrak Diagnostic CodesSymbol Code Code Name Diagnosis Cause Checks E01 High fluid temperatureCauses of E01 Errors Sensor Connector Continuity Checks Pins Description ReadingE03 No zone current E02 High zone currentE06 Communication cable unplugged E05 Control board over temperatureE99 Loss of communication Before Beginning Repair Pressure Relief ProcedureShutdownOpen Close ParkFlushingPumps and Pressures TroubleshootingProblems PowerProblem Cause Solution Electronics Problem Cause SolutionProblem Cause Solution Heater See E04 Fluid Temperature SenSor FTS or thermocouple discon Hose Heat System Problem Cause Solution Repair Follow Pressure Relief Procedure,Disconnect Pump Connect Pump Remove Air Motor Install Air MotorAir Filter Element Removal Air Filter Element InstallationRecirculation / Over Pressure Relief Block Air Inlet Filter / Water Separator Auto DrainBottom of Power Modules Temperature Control ModuleTemperature Control Module Connections Connector DescriptionTest SCR Circuit Replacing Temperature Control Assembly ModulesHeater Element Primary HeaterLine Voltage KW Dual Zone Heater Thermocouple ThermocoupleHeated Hose Overtemperature SwitchCheck Hose Connectors Pins ResultInstallation Fluid Temperature Sensor FTSTest/Removal Transformer Secondary Check Replace Transformer Transformer Primary CheckModel Secondary Voltage Size Component Replace Circuit Breaker ModulePump Lubrication System Pump Lubrication SystemRefer to Reactor A-25 Wiring Schematic, Temperature DisplayFluid Inlet Strainer Screen Display Module Detail of Membrane Switches and Temperature Display BoardReplace Battery Replace DataTrak Battery or FuseReplace Fuse Recommended Spare Parts Accessories7984 100 888 PartsTorque pump locking nuts to 66-74 ft-lbs 90-100 Nm Cart Part Description QtyNipple Screw Control PanelWheel Kit Temperature ControlRef. Part Description Qty Fluid Inlet Kit Fluid ManifoldRing Kw Dual Zone Heater, 24J788PLUG, Pipe Air Motor Pump AssemblyLength Connection Outside Ft m From Air Tubing ConnectionsColor Diameter Breaker Module Phase Reactor A-25 Wiring SchematicPOD Reactor A-25 Wiring Schematic Simplified Schematic, Heater Controls Category Data Technical DataGraco Information Graco Standard Warranty

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