If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed.
Call 1-800-833-9353(WELD).

FUNCTION PROBLEMS
(SYMPTOMS)

POSSIBLE AREAS OF
MISADJUSTMENT(S)

RECOMMENDED
COURSE OF ACTION

FUNCTION PROBLEMS

No or low output. Error code “E11”
is flashing on the digital display.

1. “E11” is an indication that the

input voltage being applied is
too high. Check for the correct
input voltage. 230VAC or
115VAC.

1. If the correct input voltage

230VAC or 115VAC is being
applied to the machine the Input
Filter Board may be faulty.
Perform the Input Filter Board
Test.

2. The Main IGBT Inverter Board

May be Faulty. Perform the
Main IGBT Inverter Board Low
Voltage Supply Test.

No or low output. Error code
“E12” is flashing on the digital dis-
play.

1. “E12” is an indication that the

input voltage being applied is
too low. Check for the correct
input voltage. 230VAC or
115VAC.

1. If the correct input voltage

230VAC or 115VAC is being
applied to the machine, the
Input Filter Board may be
faulty. Perform the Input Filter
Board Test.

2. The Main IGBT Inverter Board

May be Faulty. Perform the
Main IGBT Inverter Board
Low Voltage Supply Test.

No output. Error code “E10” is
flashing on the digital display. The
thermal indicator light is on.

1. The welding application may be

exceeding the recommended
duty cycle.

2. Dirt and dust may have clogged

the cooling channels inside the
machine. Refer to the
Maintenance Section in this
manual.

3. The air intake and exhaust lou-

vers may be blocked due in
inadequate clearance around
the machine.

4. Make sure the cooling fan is

operating correctly.

1. One of the thermal devices may

be faulty. Check and replace if
necessary. See the Wiring
Diagram.

2. The Main IGBT Inverter Board

may be faulty.