Graco A-25 important safety instructions E01 High fluid temperature, Causes of E01 Errors, Checks

Page 10

Important Two-Component Material Information

E01: High fluid temperature

Causes of E01 Errors

•Thermocouple A or B (361) senses a fluid tempera- ture above 230°F (110°C).

•Fluid temperature sensor (FTS) senses a fluid tem- perature above 230°F (110°C).

•Overtemperature switch (359) senses a fluid tem- perature above 230°F (110°C) and opens. At 190°F (87°C) the switch closes again.

•Thermocouple A or B (361) fails, is damaged, is not touching the heater element (358), or has a poor connection to the temperature control module.

•Overtemperature switch (359) fails in the open posi- tion.

•The temperature control module fails to turn off any heat zone.

•Zone power wires or thermocouples are switched from one zone to another.

•Failed heater element where thermocouple is installed.

•Loose wire

•Jumper wire covered in heat shrink in the wiring har- ness near the single over temperature switch con- nectors on the heater, is loose or incorrectly wired

Checks

Troubleshooting this equipment requires access to parts that may cause electric shock or other serious injury if work is not performed properly. Have a qualified electrician perform all electrical troubleshooting. Be sure to shut off all power to the equipment before repairing.

Check which zone is displaying the E01 error.

1.Check that connector B is firmly plugged into tem- perature control module (see FIG. 6, page 26).

2.Clean and re-plug connections.

3.Check connections between the temperature control module and overtemperature switch (359), and

between temperature control module and thermo- couples A and B (361) or FTS (21) [depending on which zone is displaying E01]. See Table 2, page

26. Ensure that all wires are securely connected to connector B.

4.Remove connector B from temperature control mod- ule, and check continuity of overtemperature switch, thermocouples A and B, or FTS by measuring resis- tance across the pins on the plug end; see Table 1.

Table 1: Sensor Connector Continuity Checks

Pins

Description

Reading

 

 

 

 

1

& 2

OT switch

nearly 0 ohms

3

& 4

Jumpered

nearly 0 ohms

5

& 6

Thermocouple A

4-6 ohms

8

& 9

Thermocouple B

4-6 ohms

11

& 12

FTS

approximately 35

 

 

 

ohms per 50 ft (15.2

 

 

 

m) of hose, plus

 

 

 

approximately 10

 

 

 

ohms for FTS at 70°F

 

 

 

(21°C)

10

& 12

FTS

open

NOTE: Before doing the following checks, note which zone (A, B, FTS, or all) has high fluid temperature.

5.Verify fluid temperature, using an external tempera- ture sensing device.

•If temperature is too high (sensor reading is 229°F [109°C] or above):

6.Check if thermocouples A and B are damaged, or not contacting the heater element, page 30.

7.To test that temperature control module turns off when equipment reaches temperature setpoint:

a.Set temperature setpoints far below displayed temperature.

b.Turn zone on. If temperature rises steadily, power module is failing.

c.Verify by swapping with another power module. See Replacing Temperature Control Assem- bly Modules, page 27.

10

3A1570A

Page 9 Page 11
Image 10
Page 9 Page 11
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 Temperature Control Diagnostic Codes DataTrak 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 currentE06 Communication cable unplugged E05 Control board over temperatureE99 Loss of communication Pressure Relief ProcedureShutdown Before Beginning RepairParkFlushing Open ClosePower TroubleshootingProblems Pumps and PressuresProblem Cause Solution Problem Cause Solution ElectronicsProblem 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 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 CircuitHeater Element Primary HeaterLine Voltage KW Dual Zone Heater Thermocouple ThermocouplePins Result Overtemperature SwitchCheck Hose Connectors Heated HoseInstallation Fluid Temperature Sensor FTSTest/Removal Transformer Secondary Check Replace Transformer Transformer Primary CheckModel Secondary Voltage Replace Circuit Breaker Module Size ComponentPump Lubrication System Pump Lubrication SystemRefer to Reactor A-25 Wiring Schematic, Temperature DisplayFluid Inlet Strainer Screen Detail of Membrane Switches and Temperature Display Board Display ModuleReplace Battery Replace DataTrak Battery or FuseReplace 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 ScrewWheel Kit Temperature ControlRef. Part Description Qty Fluid Manifold Fluid Inlet KitKw Dual Zone Heater, 24J788 RingAir Motor Pump Assembly PLUG, PipeLength Connection Outside Ft m From Air Tubing ConnectionsColor 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
Related manuals
Manual 38 pages 32.05 Kb
Top Page Image Contents