Graco A-25 important safety instructions Hose Heat System

Page 20

Troubleshooting

Hose Heat System

PROBLEM

CAUSE

SOLUTION

 

 

 

 

 

 

 

Ambient temperature is too cold.

Use auxiliary hose heat system.

 

 

 

Hose heats but heats slower than

FTS failed or not installed correctly.

Check FTS, page 11.

 

 

usual or it does not reach tempera-

Low supply voltage.

Verify line voltage. Low line voltage

ture.

 

significantly reduces power available

 

 

 

 

to hose heat system, affecting longer

 

 

hose lengths.

 

 

 

 

A and B setpoints too low.

Increase A and B setpoints. Hose is

 

 

designed to maintain temperature,

 

 

not to increase it.

 

 

 

 

Ambient temperature is too cold.

Increase A and B setpoints to

 

 

increase fluid temperature and keep

 

 

it steady.

 

 

 

Hose does not maintain temperature

Flow too high.

Use smaller mix chamber. Decrease

while spraying.

 

pressure.

Hose was not fully preheated.

Wait for hose to heat to correct tem-

 

 

 

perature before spraying.

 

 

 

 

Low supply voltage.

Verify line voltage. Low line voltage

 

 

significantly reduces power available

 

 

to hose heat system, affecting longer

 

 

hose lengths.

 

 

 

 

A and/or B heaters are overheating

Check primary heaters for either a

 

material.

thermocouple problem or a failed ele-

 

 

ment attached to thermocouple, page

 

 

11.

 

 

 

Hose temperature exceeds setpoint.

Faulty thermocouple connections.

Verify that all FTS connections are

 

snug and that pins of connectors are

 

 

clean. Examine connection of ther-

 

 

mocouples to long green plug on

 

 

heater control board. Unplug and

 

 

re-plug thermocouple wires, cleaning

 

 

off any debris. Unplug and re-plug

 

 

long green connector on heater con-

 

 

trol board.

 

 

 

 

Faulty thermocouple connections.

Verify that all FTS connections are

 

 

snug and that pins of connectors are

 

 

clean. Examine connection of ther-

 

 

mocouples to long green plug on

Erratic hose temperature.

 

heater control board. Unplug and

 

re-plug thermocouple wires, cleaning

 

 

 

 

off any debris. Unplug and re-plug

 

 

long green connector.

 

 

 

 

FTS not installed correctly.

FTS should be installed close to end

 

 

of hose in same environment as gun.

 

 

Verify FTS installation, page 32.

 

 

 

20

3A1570A

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Contents Important Safety Instructions Repair-PartsContents Proportioner Models SystemsRelated Manuals Manual DescriptionElectric Shock Hazard Fire and Explosion Hazard Equipment Misuse Hazard Important Two-Component Material Information Changing Materials Symbol Code Code Name Diagnosis Cause DataTrak Diagnostic CodesTemperature Control Diagnostic Codes E01 High fluid temperature Causes of E01 ErrorsSensor Connector Continuity Checks Pins Description Reading ChecksE02 High zone current E03 No zone currentE99 Loss of communication E05 Control board over temperatureE06 Communication cable unplugged Pressure Relief ProcedureShutdown Before Beginning RepairParkFlushing Open CloseTroubleshooting ProblemsPower Pumps and PressuresProblem Cause Solution Problem Cause Solution ElectronicsProblem Cause Solution Sor FTS or thermocouple discon See E04 Fluid Temperature SenHeater Hose Heat System Problem Cause Solution Disconnect Pump Follow Pressure Relief Procedure,Repair Connect Pump Install Air Motor Remove Air MotorAir Filter Element Installation Recirculation / Over Pressure Relief BlockAir Inlet Filter / Water Separator Auto Drain Air Filter Element RemovalTemperature Control Module Temperature Control Module ConnectionsConnector Description Bottom of Power ModulesReplacing Temperature Control Assembly Modules Test SCR CircuitLine Voltage Primary HeaterHeater Element KW Dual Zone Heater Thermocouple ThermocoupleOvertemperature Switch Check Hose ConnectorsPins Result Heated HoseTest/Removal Fluid Temperature Sensor FTSInstallation Model Secondary Voltage Transformer Primary CheckTransformer Secondary Check Replace Transformer Replace Circuit Breaker Module Size ComponentPump Lubrication System Pump Lubrication SystemFluid Inlet Strainer Screen Temperature DisplayRefer to Reactor A-25 Wiring Schematic, Detail of Membrane Switches and Temperature Display Board Display ModuleReplace Fuse Replace DataTrak Battery or FuseReplace Battery Accessories Recommended Spare PartsParts 7984 100 888Torque pump locking nuts to 66-74 ft-lbs 90-100 Nm Part Description Qty CartNipple Control Panel ScrewRef. Part Description Qty Temperature ControlWheel Kit Fluid Manifold Fluid Inlet KitKw Dual Zone Heater, 24J788 RingAir Motor Pump Assembly PLUG, PipeColor Diameter Air Tubing ConnectionsLength Connection Outside Ft m From 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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