Lincoln Electric IM845-A manual Problems Possible Areas Recommended Symptoms

E-5

TROUBLESHOOTING

E-5

Observe all Safety Guidelines detailed throughout this manual

PROBLEMS

POSSIBLE AREAS OF

RECOMMENDED

(SYMPTOMS)

MISADJUSTMENT(S)

COURSE OF ACTION

Thermal LED is lit.

1. Fan thermostat has opened.

Check for proper fan operation.

(Fan should run whenever out-

put power is on.) Check for

material blocking intake or

exhaust louvers, or for excessive

dirt clogging cooling channels in

machine. Blow air in rear louvers

to remove dirt around the fan.

2. Secondary rectifier or Choke

thermostat has opened. After

machine has cooled, reduce

load, duty cycle, or both. Check

for material blocking intake or

exhaust louvers.

3. DC Bus PC board thermostat

has opened check for excessive

load on 40VDC supply.

Machine wonʼt weld, canʼt get any

1. Input voltage is too low or too

If all recommended possible areas

output.

high. Make certain that input

voltage is proper, according to

of misadjustments have been

the Rating Plate located on the

checked and the problem persists,

rear of the machine.

contact your local Lincoln

2. If the Thermal LED is also lit,

Authorized Field Service Facility.

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

series of red and green flashes by

the

status

light.

See

"Troubleshooting the Power Wave