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TROUBLESHOOTING & REPAIR
F-6 F-6
INVERTEC STT
Observe Safety Guidelines
TROUBLESHOOTING GUIDE
detailed in the beginning of this manual.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed.
Call
1-888-935-3877
.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
OUTPUT PROBLEMS
Machine is dead - no output - no
fan - no display.
1. The power switch must be in the
"ON" position.
2. Check the input voltage. Make
sure all three phases are
applied to the machine.
3. With input power removed,
check that the input voltage set-
up switch and jumper "A" (the
reconnect auxiliary jumper) are
in the proper position for the
input voltage being used.
4. With input power removed,
check the continuity of the 4
amp slow blow fuse located on
the reconnect panel.
1. The input power switch (S1)
may be faulty. Check or
replace.
2. Perform the T1 Auxiliary
Transformer Test.
No output or reduced output the
first time power is applied to the
machine.
1. Check input voltages, fuses and
input voltage reconnect proce-
dures. See the Installation
section.
2. If high input voltage (380VAC or
higher) is applied, the capaci-
tors may need conditioning. Let
the "unloaded" machine idle for
30 minutes.
1. Contact the Lincoln Electric
Service Department.
1-888-935-
3877
.