E-2

TROUBLESHOOTING

E-2

Observe all Safety Guidelines detailed throughout this manual

PROBLEMS

POSSIBLE

RECOMMENDED

(SYMPTOMS)

CAUSE

COURSE OF ACTION

OUTPUT PROBLEMS

 

Machine is Dead -No Output - No

1.

Make certain that the input power

 

Fan

 

switch is in the “ON” position and

 

 

 

machine is plugged in.

 

 

2.

Check the input voltage at the

 

 

 

machine. Input voltage must

 

 

 

match the rating plate and volt-

 

 

 

age connection. Refer to

 

 

 

Reconnect Procedure in the

 

 

 

Installation section of this manual.

 

 

3.

Blown or missing fuses in input

 

 

 

line.

 

 

 

 

 

 

Fan runs normally at power up - No

1.

Check for proper input voltages

 

output from machine in either Stick

 

per nameplate and voltage recon-

 

or TIG modes.

 

nection.

 

 

2.

Check to make sure polarity

 

 

 

switch is not in between two posi-

 

 

 

tions.

 

 

 

 

 

Fan runs - No output from machine

1.

Welding application may have

 

in either Stick or TIG modes and the

 

exceed the recommended duty

 

yellow light on the control panel is

 

cycle. Allow the unit to run until

 

on.

 

the fan cools the unit and the yel-

 

 

 

low light goes out.

 

 

 

 

Machine does not respond (no gas

1. Machine MUST be in the TIG

 

flow, no high frequency and no open

 

Mode.

 

circuit voltage) when arc start switch

2.

The Amptrol may be defective.

 

or Amptrol is activated - fan is work-

 

Check for continuity between pins

 

ing.

 

“D” and “E” on cable connector

 

 

 

when Amptrol is depressed.

 

 

 

 

 

 

 

 

 

 

If all recommended possible areas of misadjustment have been checked and the problem persists,

Contact your local Lincoln Authorized Field Service Facility.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your

PRECISION TIG 185

Page 26
Image 26
Lincoln Electric TIG 185 manual Symptoms, Output Problems