Lincoln Electric IDEALARC SP-250 Manuel d'utilisation
Idealarc sp-250, Service manual, Svm 111-a
IDEALARC SP-250
SERVICE MANUAL
Sales and Service through Subsidiaries and Distributors Worldwide
22801 St. Clair Ave. Cleveland, Ohio 44117-1199 U.S.A. Tel. (216) 481-8100
World's Leader in Welding and Cutting Products
Premier Manufacturer of Industrial Motors
SVM 111-A
January, 1996
Safety Depends on You
Lincoln arc welding and cutting
equipment is designed and built
with safety in mind. However,
your overall safety can be
increased by proper installation
... and thoughtful operation on
your part. DO NOT INSTALL,
OPERATE OR REPAIR THIS
EQUIPMENT WITHOUT READ-
ING THIS MANUAL AND THE
SAFETY PRECAUTIONS CON-
TAINED THROUGHOUT. And,
most importantly, think before you
act and be careful.
For use with machines having Code Numbers:
9402
9546
9723
10001
10002
RETURN TO MAIN INDEX
Document Outline
- Master TOC
- Safety
- Section A Installation
- Section B Operation
- Section C Accessories
- Section D Maintenance
- Section E Theory of Operation
- Section F Troubleshooting & Repair
- 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 Display.
- No Open Circuit Voltage output but wire feeds normally when gun trigger is pulled. Display lights properly.
- No Open Circuit Voltage output and no wire feed when gun trigger is pulled. Display is functioning properly.
- Wire feeds but welding output is low causing wire to "stub". Welds are "cold". Machine cannot obtain full rated output of 250 amp
- The output voltage and wire feed is present continuously or pulsing when gun trigger is NOT activated.
- Output settings (voltage and/or wire feed speed) are being changed even though gun thumb switch or keypad
- No wire feed or open circuit voltage when gun trigger is pulled. The display lights up but the audio alarm and the display do not
- The audio alarm does NOT sound when a key is pressed, but display changes.
- The audio alarm does not sound when a key is pressed, and the display does NOT change.
- There is no gas flow when gun trigger is pulled. Wire feeds and weld voltage is present. The display functions properly.
- No readable message on the display. Backlight is lit indicating there is power to the machine.
- The display backlight does not function.
- The machine stops feeding wire while welding and the MOTOR OVERLOAD message appears on the display.
- No control of wire feed speed. Other machine functions are normal.
- There is no wire feed when gun trigger is pulled. Normal open circuit voltage is present.
- The arc is unstable and or "hunting".
- Weld bead is narrow or ropey. May have porosity with electrode stubbing into plate.
- The contact tip seizes in the gas diffuser.
- Section G Electrical Diagrams