Lincoln Electric 10372 Service Manual page 71

F-7
POWER W VE
Observe all Safety Guidelines detailed throughout this manual.
PROBLEMS
(SYMPTOMS)
The thermal LED is lit.
machine regularly overheats.
The Auxiliary Receptacle is
"dead".
The 115 VAC is missing.
The Power Wave 455 won't pro-
duce full output.
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 216-383-2531 or 1-888-935-3877.
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TROUBLESHOOTING ND REP IR
POSSIBLE
MIS DJUSTMENT(S)
OUTPUT PROBLEMS (Continued)
The 1. Welding
exceed recommended duty
cycle.
2. Dirt and dust may have clogged
the cooling channels inside the
machine. Refer to the Mainte-
nance Section of this manual.
3. Air intake and exhaust louvers
may be blocked due to inade-
quate clearance
machine.
4. Make sure the fan is functioning
correctly.
1. Check the 10 amp circuit break-
er (CB2) located on the case
front. Reset if necessary.
2. Check the 10 amp circuit break-
er (CB3) located in the recon-
nect area. Reset if necessary.
1. The input voltage may be too
low, limiting the output capabili-
ty of the Power Wave 455.
Make certain the input voltage
is proper for the machine and
reconnect panel configuration.
2. Make sure all three phases of
input power are being applied
to the machine.
C UTION
POWER W VE 455/POWER FEED 10
RE S OF RECOMMENDED
COURSE OF
application may 1. One of the thermostats may be
faulty. Check or replace. See
wiring diagram.
around
1. Check the receptacle and asso-
ciated wiring for loose or faulty
connections. See wiring dia-
gram. (Plugs P80 and P81)
2. Perform the uxiliary Transfor-
mer T2 Test.
1. Perform the Output Rectifier
Test.
2. Perform the Power Board Test.
3. Compare the display voltage
reading with an actual voltage
reading at the output terminals.
If the discrepancy is greater
than two volts the control board
may be faulty.
4. Perform the Current Trans-
ducer Test.
F-7
CTION