C-
2
TROUBLESHOOTING
C-
2
Rev. 05
OPTIMARC
®
AC/DC 350-TP
CAUTION
If for any reason you do not understand the test procedures or are unable to
perform the tests/repairs safely, contact your local authorized Lincoln Electric
Field Service Facility for technical assistance.
Observe all Safety Guidelines detailed in the beginning and throughout this menual.
Problems (Symptoms)
Possible Areas of Misadjustment(s)
Recommended Course of Action
4. Try to adjust arc force value
5. PC board in machine possibily at
fault.
Starting arc is difficult.
1.
Verify the proper polarity is being
used for the weld procedure.
2.
Check all electrode and work
connections.
3.
Verify the parameters of output
current and shielding gas(TIG
mode) are proper for the welding
procedure.
4.
Try to adjust hot start value.
5.
PC board in machine possibily at
fault.
If PC board in machine is at fault,
contact an authorized Lincoln
Electric Service facility for
technical assistance.
Remote output control not
functioning. The machine operates
normally on LOCAL control.
1.
Make sure the remote control
must be set to 1 (enable remote
control).
2.
Make sure a remote control
device is attached to the remote
receptacle properly.
3.
The remote control device may be
faulty, Replace.
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
contact your local Lincoln
Authorized Field Service Facility.
Poor MMA electrode welding
performance. The arc pops out.
1.
Check for loose or faulty welding
cables.
2.
Is the electrode DRY? Try welding
with another electrode from a
different container. Make sure you
have the correct electrode for the
application.
3.
Make sure the machine settings
are correct for the weld process
being used.
Poor welding, weld setting drift, or
output power is low.
1.
Make sure the machine settings
are correct for the welding
process being used.
2.
Check machine performance on
LOCAL control. If OK then the
remote control device maybe
faulty. Check and replace.
3.
Check for loose or faulty welding
cables.
HF arc starting is difficult
1. Check if the high-frequency
generator is covered dust.
2. The discharging gap is too
smaller.
3. The harnesses aren
’t connected
tightly.
4. The arc-striking coil is broken.
Clean off the dust on the HF
generator.
Re-adjust the discharging gap,
and make it ranging from 0.75mm
to 0.85mm.
Note: too bigger gap will make
the control circuit damaged.
Reconnection.
Note: the high voltage on the
high-frequency arc-striking
generator!
contact your local Lincoln
Authorized Field Service Facility.