Lincoln Electric IM762-C manual Authorized Field Service Facility

E-5

TROUBLESHOOTING

E-5

Observe all Safety Guidelines detailed throughout this manual

PROBLEMS

POSSIBLE

RECOMMENDED

(SYMPTOMS)

CAUSE

COURSE OF ACTION

OUTPUT PROBLEMS

Machine won’t weld, can’t get any

1. Input voltage is too low or too

output. (CR1 will not pull in.)

high. Make certain that input

voltage is proper, according to

the Rating Plate located on the

rear of the machine.

2. If the Thermal LED is also lit,

see “Yellow Thermal LED is Lit”

section.

3. Primary current limit has been

exceeded. Possible short in out-

put circuit. Turn machine off.

Remove all loads from the out-

put of the machine. Turn back

on. If condition persists, turn

power off, and contact an autho-

rized

Lincoln

Electric

Field

Service facility.

4. This problem will normally be

accompanied by an error code.

Error codes are displayed as a

If all recommended possible areas

series of red and green flashes by

of misadjustments have been

the

status

light .

See

checked and the problem persists,

"Troubleshooting the Power Wave

contact your local Lincoln

/ Power Feed System Using the

Authorized Field Service Facility.

Status LED" section of this text.

Machine often “noodle welds” (out-

1.Secondary current limit has been

put is limited to approximately 100

exceeded, and the machine has

amps) when running a particular

phased back to protect itself.

procedure, especially a procedure

2. Adjust procedure or reduce load

with high WFS.

to lower current draw from the

machine.

3. A single phase input (loss of L2)

will reduce the secondary cur-

rent limit from 570 Amps to 325

Amps.