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F-3
TROUBLESHOOTING & REPAIR
F-3
IDEALARC SP-250
TROUBLESHOOTING GUIDE - Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, con-
tact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed call 216-
383-2531 or 1-800-833-9353
OUTPUT PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENTS(S)
RECOMMENDED
COURSE OF ACTION
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
Display.
No Open Circuit Voltage output but
wire feeds normally when gun trigger
is pulled. - Display lights properly.
1. Contact The Lincoln Electric
Service Dept. (216) 383-2531 or
1-800-833-9353 (WELD)
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
Assembly Test.
4. The Control board may be faulty
- Replace.
1. Contact your local Lincoln
Electric Authorized Field Service
Facility.
1. Make certain that the input
power switch is in the "ON" posi-
tion.
2. Check the input voltage at the
machine. Input voltage must
match the rating plate and the
reconnect 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
reconnect panel - High or Low
Line message may be displayed.
2. The gun may be faulty. Check or
replace.
CAUTION