Lincoln Electric LN-25 SVM114-C - Manual (Page 44)

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1. Perform the Contactor Test.
NOTE:Test i s c o d e s p e c i f i c .
Codes above 10100 may
o r m ay n o t h ave a
Contactor PC Board.
2. The Contactor PC board or the
Control Board may be faulty.
Replace.
FUNCTION PROBLEMS (Continued)
Observe Safety Guidelines
detailed in the beginning of this manual.
Troubleshooting Guide –
See Wiring Diagrams for location of specified
components. See Wiring Diagrams for troubleshooting of specific circuits.
The gas solenoid valve will not
function.
1. M a ke s u r e t h e L N - 2 5 ™ i s
equipped with a gas solenoid
valve and properly connected.
2. Make sure the gas supply is
adequate and the gas hoses
are not loose or kinked.
NOTE:Control Boards L12253-[ ]
or higher do not use a Gas
Solenoid PC Board.
1a.Pe r fo r m t h e Solenoid PC
Board and Gas Solenoid
Valve Test
NOTE:Test i s c o d e s p e c i f i c .
Codes above 10100 may
o r m ay n o t h ave a
Solenoid PC Board.
2. If a K434-1 gas flow timer kit is
installed in the unit, disconnect
and plug in the timer jumper
p l u g . I f t h e g a s s o l e n o i d
f u n c t i o n s, t h e n r e p l a c e t h e
K434-1 kit.
3. The contactor board or remote
control board (if used) may be
faulty.
4. T h e c o n t r o l b o a r d m ay b e
faulty. Replace.
F-6 TROUBLESHOOTING AND REPAIR F-6
LN-25™
PROBLEMS
(SYMPTOMS) POSSIBLE AREAS OF
MISADJUSTMENT(S) RECOMMENDED
COURSE OF ACTION
The wire feed motor r uns at a
constant speed with no control.
NOTE:Loss of tach feedback may
result in MAX speed or a
motor voltage of approx.
14VDC depending on the
Control Board being used.
1. M a ke s u r e t h e m o d e sw i t c h
(S3) is in the CV mode.
2. M a ke s u r e t h e w i r e s p e e d
c o n t r o l a n d t h e w i r e s p e e d
ra n g e sw i t c h ( S 2 ) a r e s e t
correctly.
1. Pe r fo r m t h e Hall Effect
Module Test.
2. Perform the Wire Drive Motor
Test.
3. T h e c o n t r o l b o a r d m ay b e
faulty. Replace.
The contactor does not function. 1. Make cer tain the LN-25™ is
equipped with a contactor and
properly connected.
2. Check the connections to the
contactor PC board.
NOTE:Control Boards L12253-[ ]
o r h i g h e r d o n o t u s e a
Contactor PC Board.
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.
CAUTION