Troubleshooting and repair, Caution, Troubleshooting guide – Lincoln Electric POWER MIG SVM157-A User Manual
Page 41
TROUBLESHOOTING AND REPAIR
Observe Safety Guidelines
detailed in the beginning of this manual.
Troubleshooting Guide –
See Wiring Diagrams for location of specified
components and for troubleshooting of specific circuits.
F-7
F-7
POWER MIG 200
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 1-800-833-9353
CAUTION
FUNCTION PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
There is no gas flow when the gun
trigger is activated . The wire feeds
and the arc voltage is present.
The machine stops feeding wire
while welding. When the gun trig-
ger is released and pulled again,
the wire feed starts.
1. If a spool gun adapter is installed,
make certain the toggle switch in
the spool gun kit in the correct
position.
2. If a spool gun adapter is NOT
installed, make certain the jumper
plug is installed in J5. See the
wiring diagram.
3. Check the gas source and hoses
for kinks or leaks.
1. Check for a mechanical restric-
tion in the wire feed path. The
gun may be clogged.
2. Make sure the drive rolls and
guide plates are clean and are
the correct size.
3. Check the spindle for ease of
rotation.
1. Check plug J1 on the control board
for loose or faulty connections. See
wiring diagram.
2. Check the gas solenoid by discon-
necting it from leads #108A and
#116A&B. Apply a 12VDC external
supply to the solenoid. If the sole-
noid does NOT activate then it may
be faulty. Replace.
1. Check the motor armature current.
Normal armature current is 2.0 to 2.7
amps maximum. If the motor arma-
ture current is normal, and the motor
continues to shut-off, the control
board may be faulty. Replace.
2. If the motor armature current is high
(over 2.7 amps) and there are NO
restrictions in the wire feeding path
then the motor or gearbox may be
defective. Replace.