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OUTPUT PROBLEMS
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
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 1-888-935-3877.
CAUTION
The Machine is dead - The Input
contactor does not operate.
1. Check for blown or missing
fuses in input lines.
2. Check the three phase input line
voltage at the machine. The
input voltage must match the
rating plate and reconnect
panel.
1. The ON/OFF Switch (S1) may
be faulty
2. The Control Transformer (T2)
may be faulty. Perform the
Control Transformer Test.
3. The primary or secondary ther-
mostats may be open. Check or
replace. Also check the associ-
ated wiring. See the Wiring
Diagram.
4. The pilot relay (CR2) may be
faulty. Check or replace.
5. The input contactor coil may be
open.
6. The Control Board may be
faulty. Perform the Control
Board Test.
Input contactor (CR1) chatters.
1. The input line voltage may be
low. Check all three phases.
2. Make sure input line voltage
matches machine rating and the
reconnect panel is connected
correctly for the line voltage
1. The pilot relay (CR2) may have
bad contacts. Check or replace
relay.
2. Check for loose or faulty wiring
between pilot relay (CR2) and
input contactor (CR1) coil con-
nections.See Wiring Diagram.
3. The input contactor (CR1) may
be faulty.-Replace.
TROUBLESHOOTING AND REPAIR
F-4 F-4
DC-600
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