Lincoln Electric IM10153 CLASSIC 300 HE - Manual (Page 24)

E-2 TROUBLESHOOTING E-2
CLASSIC ® 300HE
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
Observe all Safety Guidelines detailed throughout this manual
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
Machine fails to hold the output
(heat) consistently. 1. Rough or dirty commutator.
2. Brushes may be worn down to
Limit.
3. Field circuit may have variable
resistance connection or inter-
mittent open circuit due to
loose connection or broken
wire.
4. Electrode lead or work lead
connection may be poor.
5. Wrong grade of brushes may
have been installed on gener-
ator.
6. Field rheostat may be making
poor contact and overheating.
If all recommended possible areas of
misadjustment have been checked
and the problem persists, Contact
your local Lincoln Authorized
Field Service Facility.