Lincoln Electric IM697 RED-D-ARC MX 300 - Manual (Page 25)

E-5 TROUBLESHOOTING E-5
Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
Current changing with arc length
in Stick welding:
Poor performance on "fast-freeze"
type electrodes such as E6010,
E7010:
Bad starting:
Electrode "stubbing":
1. Check the CC Slope switch on the
recessed panel, it should be set at
Stick/Gauge position for Stick
welding.
2. Faulty CC Slope switch or con-
nections.
3. Faulty Weld Control PCB.
1. Check the CC Slope switch on the
recessed panel, it should be set at
Pipe position.
2. Faulty CC Slope switch or con-
nections.
3. Faulty connections on Weld
Control PCB connectors.
4. Faulty Weld Control PCB.
1. Adjust Hot Start setting on the
recessed panel.
2. Check Hot Start potentiometer
and connections. The Hot Start
and Arc Force potentiometers are
interchangeable, switch them to
check out.
1. Adjust Arc Force setting on the
recessed panel.
2. Check Arc Force potentiometer
and connections. The Hot Start
and Arc Force potentiometers are
interchangeable, switch them to
check out.
If all recommended possible areas of
misadjustment have been checked
and the problem persists, Contact
your local Authorized Field
Service Facility.
RED-D-ARC MX350