Lincoln Electric IM762-C manual Cabling, etc

E-6

TROUBLESHOOTING

E-6

Observe all Safety Guidelines detailed throughout this manual

PROBLEMS

POSSIBLE

RECOMMENDED

(SYMPTOMS)

CAUSE

COURSE OF ACTION

OUTPUT PROBLEMS

Machine won’t produce full output.

1.

Input voltage may be too low,

limiting output capability of the

power source. Make certain that

the input voltage is proper,

according to the Rating Plate

located on the rear of the

machine.

2.

Input may be “single phased”.

Make certain the input voltage is

proper on all three Input lines.

3.

Secondary current or voltage not

be properly calibrated. Check

values displayed on the Power

Feed 10/11 verses readings on

an external meter.

Auxiliary receptacle is “dead” no

1.

Circuit breaker CB2 (on case

auxiliary voltage .

front) may have opened. Reset.

2.

Circuit breaker CB4 (in recon-

nect area) may have opened.

If all recommended possible areas

Reset.

of misadjustments have been

General degradation of the weld

1.Check for feeding problems, bad

checked and the problem persists,

performance

connections, excessive loops in

contact your local Lincoln

cabling, etc.

Authorized Field Service Facility.

2.

Verify weld mode is correct for

processes.

3.

The power source may require

calibration.

4.

Check the actual current dis-

played on the Power Feed 10

vs. actual current measured via

external meter.

5.

Check the actual voltage dis-

played on the Power Feed 10

vs. actual voltage measured via

external meter.

6.

Check the actual WFS displayed

on the Power Feed 10 vs. actual

WFS measured via external

meter.

Excessively long and erratic arc.

1.

Check for proper configuration

and implementation of voltage

sensing circuits.