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WIRE FEED MODULE™
Observe all Safety Guidelines detailed throughout this manual
PROBLEMS
(SYMPTOMS)
Machine has no output with machine
switch in CV mode.
Machine has minimum output and no con-
trol.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
POSSIBLE
CAUSE
1.
Electrode or work lead loose or broken.
2.
No generator output.
3.
CR4 is not working, or no input to CR4.
4.
Protective circuits operating due to
output short circuit.
5.
Broken or loose wiring connections.
6.
Defective P.C. Board
1.
No shunt field voltage.
2.
Excessive current, thermal shutdown.
3.
Open in feedback circuitry.
4.
Voltage adjust potentiometer circuit
open or misconnected.
5.
Defective P.C. Board.
CAUTION
E-2
TROUBLESHOOTING
RECOMMENDED
COURSE OF ACTION
1.
Repair Connection.
2.
Refer to quick check procedure for
generator only.
3.
Refer to procedure for Checking the
Cold Tip Contactor (CR4).
4.
Turn engine off. Remove short
circuit.
5.
Broken or loose connections from WFM
to control panel and engine welder.
Refer to wiring diagram to check.
6.
Refer to P.C. Board Troubleshooting
Procedure.
1.
In CV mode, check for 10-60 VDC
across pin 8 of J3 and pin 1 of J4 on
WFM P.C. Board.
-- Check for loose or broken
nections in wiring harness.
-- Refer to P.C. Board Troubleshooting
Procedure.
2.
Remove load and allow machine to
cool down. If output returns after cool
down, reduce output or duty cycle.
-- Check for continuity at quick con-
nects between leads 609 and 608
inside the WFM.
-- Check wiring harness with these
connections.
-- Check continuity of the thermostat
located on the generator negative
brushholder.
3.
Check in-line connector, P.C. Board,
and wiring harness plugs, especially
leads 667 and 621.
4.
Refer to procedure for checking
Voltage Control Potentiometer on
Machine. Check wiring of lead num-
bers 75, 76, and 77.
5.
Refer to P.C. Board Troubleshooting
Procedure.
con-
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