Lincoln Electric R3R 375-I, R3R 500-I manual Problems Possible Cause Recommended

Page 18

E-6

 

TROUBLESHOOTING

 

E-6

 

 

 

 

 

 

Observe all Safety Guidelines detailed througout this manual

 

 

 

 

 

 

 

PROBLEMS

POSSIBLE CAUSE

RECOMMENDED

 

 

(SYMPTOMS)

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

FUNCTION PROBLEMS

L. Optional remote current control not functioning. See Troubleshooting , Section C before connecting.

1.Current control switch in the wrong position.

2.Leads 75, 76 and 77 not con- nected to correct numbers on models with terminal strip.

3.Remote control leads broken.

4.Remote control potentiometer open.

5.Lead or connection in current control circuit open.

6.Control PC board plug discon- nected or loose.

7.Control circuit problems.

1. Place switch in “remote” (

)

position.

 

2.Correct connection.

3.Repair broken leads.

4.See Troubleshooting, Section C.

5.Connect or repair.

6.Connect plug.

7.See SCR Troubleshooting, Section K.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

IDEALARC® R3R 375-I, 500-I AND 600-I

Image 18
Contents R3R 375-I, 500-I Safety California Proposition 65 WarningsElectric Shock can kill Welding and Cutting Sparks can Cause fire or explosion Précautions DE Sûreté Sûreté Pour Soudage a L’ArcThank You Table of Contents Input Power Connection InstallationInstallation Duty CycleOperation ARC Force Control Dial Output Current Control MACHINE- Remote SwitchHigh Temperature Warning Light Output Current Control DialK857 Remote Current Control AccessoriesOptional Equipment K817, K817R UndercarriagePower Rectifier Replacement MaintenanceRoutine Maintenance Pocket AmptrolTroubleshooting HOW to USE Troubleshooting GuideRecommended Function Problems Troubleshooting Troubleshooting Problems Possible Cause Recommended R3R 375Troubleshooting Procedures Checking Snubber CircuitChecking Current Control Rheostat on Machine Power Silicon Controlled REC- Tifier Test Diagram Power Diode TestWiring Diagrams Idealarc R3R-400, 500-I, 500 & 600-I Wiring DiagramWiring Diagrams R3R 375-I, 500-I K817 or K817R Precaucion Aviso DE