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

Error code “E20”, “E24”, or “E25”
is flashing on the digital display.

1. Any one of these codes indi-

cates a memory error.

1. The Control/Display Board is

faulty. Replace.

No High Frequency when the torch
trigger is pulled and the machine is
in the TIG mode.

1. Make sure the HF is in the

active mode. See the Set-up
Menu in this manual.

1. Check fuse F2 on the Bus

Board.

Check for 385VDC at Test
Points 9 and 20. See the Main
IGBT Inverter Board UPFR
Test.

3. Perform the Control/Display

Board Test.

4. The HF board may be faulty.

Replace.

Error code “E14” is flashing of the
digital display

1. This is an indication that the

output inductance is too high.

1. Check for excessive welding

cable length.

2. The Main IGBT Inverter Board

may be faulty.

3. The Superimposition Board may

be faulty.

4. The Control/Display Board may

be faulty.

The machine functions normally
except the cooling fan does not
operate.

1. Check for obstructions that

could prevent the fan from turn-
ing.

1. Check the fan fuse F3 located on

the Bus Board Replace if faulty.

2. Perform the Bus Board Test.

3. The Main IGBT Inverter Board

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