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GENERAL PROBLEMS
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely,
contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed.
Call 1-888-935-3877.
CAUTION
THEORY OF OPERATION
F-5 F-5
V160-S & -T
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The machine powers up correctly
but working only in stick mode
(V160T pulse)
1. Make sure that the tig torch is
good
1. The control board may be faulty
The machine has only touch start
and no HF (V160T pulse only)
1. Check the HF transformer for
loose or faulty connection in HF
area
1. Perform the Input Board Test
The fan does not operate 1. Check if the machine is in
stand-by condition (after 5 min-
utes of inactivity in tig mode the
fan stops)
2. Check the fan supply voltage,
must be 12vdc
1. Replace the fan
2. Perform the Input Board Test
3. The control board may be faulty
The gas solenoid does not work
(V160T only)
1. Check the gas solenoid supply
voltage, it must be 12vdc, when
the trigger is pressed
2. Replace the gas solenoid
1. Perform the Input Board Test
2. The control board may be faulty
The power LED on the front panel is
“blinking”
1. Check the input voltage
2. Check for high input current due
to exceeding duty cycle rating
1. Connect the machine to the cor-
rect voltage
2. Perform the Input Board Test
Bad welding in stick mode 1. Check the input voltage, must
match the rating plate
2. Check the mode switch
1. Maybe the arc force does not
work, Replace the weld con-
troller board or the display
board
The thermal light remains lit 1. Check the thermal protector on
the output diodes heatsink
1.
Perform the Inverter Board Test
The machine has output current but
it is not adjustable
1. Check the current potentiometer 1. Replace the control board
2.
Perform the Inverter Board Test