Lincoln Electric POWER FEED SVM185-A User Manual
Power feed, Svm185-a, Service manual
POWER FEED
®
25M
SVM185-A
July, 2008
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.
SERVICE MANUAL
For use with machine code numbers
11313
• Sales and Service through Subsidiaries and Distributors Worldwide •
Cleveland, Ohio 44117-1199 U.S.A. TEL: 888.935.3877 FAX: 216.486.1751 WEB SITE: www.lincolnelectric.com
• World's Leader in Welding and Cutting Products •
Copyright © Lincoln Global Inc.
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Table of contents
Document Outline
- Master Table of Contents
- Safety
- Section A - Installation
- Section B - Operation
- Section C - Accessories
- Section D - Maintenance
- Section E - Theory of Operation
- Section F - Troubleshooting and Repair
- Symptoms
- The ammeter on the POWER FEED® 25M does not function properly even though the STATUS LEDs are steady green.
- The display and/or indicator LEDs do not change when their corresponding switches and or knobs are activated or turned.
- The mode and/or settings change while welding under normal conditions.
- The wire feed speed is consistent and adjustable, but runs at the wrong speed.
- The unit shuts off while welding or attempting to weld. The STATUS LED is alternating between red and green every second. The unit tries to recover after 30 seconds and may repeat sequence.
- The feeder does power up - no display, no cold feed.
- No shielding gas.
- Inconsistent wire feeding or wire not feeding but drive rolls turning.
- Variable or "hunting" arc.
- Poor arc starts with sticking or"blast-offs", weld porosity, narrow and ropy looking bead.
- The wire feed speed/amperage and voltage/trim display work during preset but show nothing during welding.
- Major physical or electrical damage is evident when the sheet metalcover(s) are removed.
- No wire feed, solenoid or arc voltage. The STATUS LED's are steady green.
- No control of wire feed speed. All STATUS LEDs are steady green.The preset wire feed speed is adjustable on the front panel.
- No welding arc voltage when the gun trigger is activated. The wire feeds normally and the gas solenoid functions properly. The STATUS LEDs are steady green on the wire drive unit.
- The wire feed speed does not change when welding current is established. The WFS stays at the run-in speed. The STATUS LEDs are steady green.
- The purge switch does not activate the gas solenoid, but gun trigger closure in the MIG or pulse modes does activate the solenoid. The LEDs are steady green on the power source, and wire drive unit.
- The COLD INCH/GAS PURGE switch does not turn on the wire drive motor but gun trigger closure in the MIG or Pulse modes does activate the wire drive motor. The LEDs are steady green on the power source, and wire drive unit.
- The voltmeter on the wire feeder does not function properly even though the STATUS LEDS are steady green.
- The displays are blank (not lit). The wire feeds when the gun trigger is activated.
- The dual procedure is not functional when using the remote Dual Procedure switch. The STATUS LEDs are steady green on the power source, and wire drive units.
- Section G - Electrical Diagrams