Graco A-25 important safety instructions Problem Cause Solution

Page 18

Troubleshooting

Problem	Cause		Solution

	Low voltage.	Ensure input voltage is within specifi-
		cations, page 36.

	Poor display connection.	Check cable connections, page 36.
Erratic display; display turns on and		Replace damaged cable.
Erratic display; display turns on and
off.	Display cable damaged or corroded.	Clean connections; replace cable if is
		damaged.

	Display cable not grounded.	Ground cable, page 37.

	Display extension cable too long.	Must not exceed 100 ft (30.5 m)

Hose display reads OA at startup.	FTS disconnected or not installed.	Verify proper installation of FTS (see
		Operation manual), or adjust FTS to
		desired current setting.

	Poor display connection.	Check cable connections, page 36.
		Replace damaged cable.

Display does not respond properly to	Display cable damaged or corroded.	Clean connections; replace cable if is
button pushes.		damaged.
	Ribbon cable on display circuit board	Connect cable (page 36) or replace.
	disconnected or broken.

	Broken display button.	Replace, page 36.

No hose heat.	Loose hose electrical connections.	Check connections. Repair as neces-
		sary.

	Circuit breakers tripped.	Reset breakers (CB1 or CB2), page
		34.

	Hose zone not turned on.
		Press	zone	key.

	A and B temperature setpoints too	Check. Increase if necessary.
	low.

	Failed temperature control module.	Open cabinet. Check if board LED is
		blinking. If not, check power wiring
		connections to ensure module has
		power. If board has power and LED is
		not blinking, replace module, page
		26.

Low hose heat.	A and B temperature setpoints too	Increase A and B setpoints. Hose
	low.	designed to maintain temperature,
		not increase temperature.

	Hose temperature setpoint too low.	Check. Increase if necessary to
		maintain heat.

	Flow too high.	Use smaller mix chamber. Decrease
		pressure.

	Low current; FTS not installed.	Install FTS, see operation manual.

	Hose heat zone not turned on long	Allow hose to heat up, or preheat
	enough.	fluid.

	Loose hose electrical connections.	Check connections. Repair as neces-
		sary.

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3A1570A

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Contents Important Safety Instructions Repair-PartsContents Related Manuals Proportioner ModelsSystems Manual DescriptionElectric 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 Sensor Connector Continuity Checks Pins Description Reading E01 High fluid temperatureCauses of E01 Errors ChecksE02 High zone current E03 No zone currentE05 Control board over temperature E06 Communication cable unpluggedE99 Loss of communication Pressure Relief ProcedureShutdown Before Beginning RepairParkFlushing Open Close Power Troubleshooting Problems Pumps and PressuresProblem Cause Solution Problem Cause Solution ElectronicsProblem 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 Install Air Motor Remove Air MotorAir Inlet Filter / Water Separator Auto Drain Air Filter Element InstallationRecirculation / Over Pressure Relief Block Air Filter Element RemovalConnector Description Temperature Control ModuleTemperature Control Module Connections Bottom of Power ModulesReplacing Temperature Control Assembly Modules Test SCR CircuitPrimary Heater Heater ElementLine Voltage KW Dual Zone Heater Thermocouple ThermocouplePins Result Overtemperature SwitchCheck Hose Connectors Heated HoseFluid Temperature Sensor FTS InstallationTest/Removal Transformer Primary Check Transformer Secondary Check Replace TransformerModel Secondary Voltage Replace Circuit Breaker Module Size ComponentPump Lubrication System Pump Lubrication SystemTemperature Display Refer to Reactor A-25 Wiring Schematic,Fluid Inlet Strainer Screen Detail of Membrane Switches and Temperature Display Board Display ModuleReplace DataTrak Battery or Fuse Replace BatteryReplace Fuse Accessories Recommended Spare PartsParts 7984 100 888Torque pump locking nuts to 66-74 ft-lbs 90-100 Nm Part Description Qty CartNipple Control Panel ScrewTemperature Control Wheel KitRef. Part Description Qty Fluid Manifold Fluid Inlet KitKw Dual Zone Heater, 24J788 RingAir Motor Pump Assembly PLUG, PipeAir Tubing Connections Length Connection Outside Ft m FromColor Diameter Breaker Module Reactor A-25 Wiring Schematic PhasePOD Reactor A-25 Wiring Schematic Simplified Schematic, Heater Controls Technical Data Category DataGraco Standard Warranty Graco Information

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