Lincoln Electric IDEALARC SP-255 Service Manual page 56

F-3
TROUBLESHOOTING GUIDE - Observe all Safety Guidelines detailed throughout this manual
PROBLEMS
(SYMPTOMS)
Major Physical or Electrical Damage
is Evident
Machine is dead - No Open Circuit
Voltage output and No Wire Feed
when gun trigger is pulled. No Dis-
play.
No Open Circuit Voltage output but
wire feeds normally when gun trigger
is pulled. - Display lights properly.
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.
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENTS(S)
OUTPUT PROBLEMS
1. Contact your local Lincoln Elec-
tric Authorized Field Service Fa-
cility.
1. Make certain that the input power
switch is in the "ON" position.
2. Check the input voltage at the
machine. Input voltage must
match the rating plate and the re-
connect panel.
3. Blown or missing fuses in the
input line.
1. Check the input voltage at the
machine. Input voltage must
match the rating plate and the re-
connect panel - High or Low Line
message may be displayed.
2. The gun may be faulty. Check or
replace.
CAUTION
IDEALARC
COURSE OF ACTION
1. Contact The Lincoln Electric
Service Dept. 1-888-935-3877.
1. Check input power switch (S1). It
may be faulty.
2. Check for loose or broken wires
at the reconnect panel.
3. Perform Main Transformer Test.
1. Check for loose or broken con-
nections at the output terminals,
the choke, the capacitor bank
and all heavy current carrying
leads.
2. Make sure that the transformer
secondary leads are securely
connected to the SCR Rectifier
Assembly.
3. Perform the SCR Rectifier As-
sembly Test.
4. The Control board may be faulty
- Replace.
SP-255
®
F-3
RECOMMENDED