Graco A-25 important safety instructions Troubleshooting, Problems, Power, Pumps and Pressures

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Troubleshooting

Before performing any troubleshooting procedures: 1. Relieve pressure, page 13.

2.	Turn main power OFF	.
3.	Allow equipment to cool.

Troubleshooting

Problems

Try the recommended solutions in the order given for each problem, to avoid unnecessary repairs. Also, determine that all circuit breakers, switches, and con- trols are properly set and wiring is correct before assum- ing there is a problem.

Power

PROBLEM	CAUSE	SOLUTION

Heat zones do not operate	No power	Connect power cord

		Turn Main Disconnect Switch ON

	Power cord not connected properly	Check connections

No power when disconnect switch is	Power terminal jumper still at 380V, 3	Place jumpers in correct position; see
turned on; using 230V, 1 phase or	phase position, as shipped from fac-	Operation manual and label inside
230V, 3 phase power	tory	front lower cabinet.

External main supply power circuit	Power terminal jumper was left in	Place jumpers in correct position; see
breaker trips and Reactor disconnect	230V, 1 phase position. When using	Operation manual. Replace main
switch fails when switch is turned on.	230V, 3 phase or 380V, 3 phase	power disconnect switch; see page
	power	40.

No temperature display lights at	No power	Connect power cord
startup
startup		Turn Main Disconnect Switch ON
		Turn Main Disconnect Switch ON

	Control power fuses blown	Check and replace fuses on long ter-
		minal strip

Pumps and Pressures

PROBLEM	CAUSE	SOLUTION


Pump does not run up and down	Motor control valve closed	Open air motor shutoff valve

	No air supply	Air supply line not connected

		Open inlet air ball valve

	Air pressure regulators set at 0 psi	Turn up air pressure regulators

	Air motor shuttle valve is centered.	Push button on top of air motor shut-
		tle valve.

Pump runs but no fluid pressure	Fluid inlet ball valves closed	Open fluid inlet ball valves

3A1570A

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Image 15

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 DataTrak Diagnostic Codes Temperature Control 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 currentE05 Control board over temperature E06 Communication cable unpluggedE99 Loss of communication Before Beginning Repair Pressure Relief ProcedureShutdownOpen Close ParkFlushingPumps and Pressures TroubleshootingProblems PowerProblem Cause Solution Electronics Problem Cause SolutionProblem Cause Solution See E04 Fluid Temperature Sen HeaterSor FTS or thermocouple discon Hose Heat System Problem Cause Solution Follow Pressure Relief Procedure, RepairDisconnect 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 ModulesPrimary Heater Heater ElementLine Voltage KW Dual Zone Heater Thermocouple ThermocoupleHeated Hose Overtemperature SwitchCheck Hose Connectors Pins ResultFluid Temperature Sensor FTS InstallationTest/Removal Transformer Primary Check Transformer Secondary Check Replace TransformerModel Secondary Voltage Size Component Replace Circuit Breaker ModulePump Lubrication System Pump Lubrication SystemTemperature Display Refer to Reactor A-25 Wiring Schematic,Fluid Inlet Strainer Screen Display Module Detail of Membrane Switches and Temperature Display BoardReplace DataTrak Battery or Fuse Replace BatteryReplace 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 PanelTemperature Control Wheel KitRef. Part Description Qty Fluid Inlet Kit Fluid ManifoldRing Kw Dual Zone Heater, 24J788PLUG, Pipe Air Motor Pump AssemblyAir Tubing Connections Length Connection Outside Ft m FromColor 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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