Lincoln Electric IM669 RED-D-ARC DC-600 - Manual (Page 34)

DC-600 RED-D-ARC
E-6 TROUBLESHOOTING E-6
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
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Authorized
Field Service Facility.
PROBLEMS
(SYMPTOMS)
Machine shuts off (input contactor
drops out) when the welder output
terminals are made electrically
"hot".
(#2 to #4 closure at terminal strip.)
or OUTPUT TERMINALS switch
is in ON position.
The DC600 will NOT shut off when
the Power Switch is turned to
OFF.
The weld output terminals are
always electrically "hot".
POSSIBLE
CAUSE
1. Remove all welding cables and
control cables from the DC-600.
Jumper #2 to #4 at the terminal
strip or set OUTPUT TERMI-
NALS switch to ON position. If
the machine does NOT shut off
and normal open circuit voltage
is present at the welder output
terminals the problem is exter-
nal to the DC-600. Either the
remote leads #75, #76 or #77
are grounded to the negative
output cable or there is a short
on the welding output terminals.
2. If the machine still shuts off
when all control and welding
cables are removed then the
problem is internal to the DC-
600.
1. Contact your local Authorized
Field Service Facility.
1. Remove any external leads
hooked to #2 and #4 on the ter-
minal strip or any connections
to the 14 pin MS connector. Set
OUTPUT TERMINALS switch
to the OFF position. If the prob-
lem disappears the fault is in
the control cable or wire feeder.
2. If some open circuit voltage is
present (over 3VDC.) after per-
forming Step #1. then the prob-
lem is within the DC-600.
RECOMMENDED
COURSE OF ACTION
OUTPUT PROBLEMS
Observe all Safety Guidelines detailed throughout this manual