Lincoln Electric WIRE FEED MODULE IM 513-B - Manual (Page 21)

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TROUBLESHOOTING
TROUBLE CAUSES WHAT TO DO
1. Machine has no output
with machine switch in
CV mode.
2. Machine has minimum
output and no control.
a. Electrode or work lead loose or
broken.
b. No generator output.
c. CR4 is not working, or no input to
CR4.
d. Protective circuits operating due to
output short circuit.
e. Broken or loose wiring connec-
tions.
f. Defective P.C. Board
a. No shunt field voltage.
b. Excessive current, thermal shut-
down.
c. Open in feedback circuitry.
d. Voltage adjust potentiometer circuit
open or misconnected.
e. Defective P.C. Board.
a. Repair Connection.
b. Refer to quick check procedure for
generator only.
c. Refer to procedure for Checking the
Cold Tip Contactor (CR4).
d. Turn engine off. Remove short
circuit.
e. Broken or loose connections from
WFM to control panel and engine
welder. Refer to wiring diagram to
check.
f. Refer to P.C. Board Troubleshooting
Procedure.
a. 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
connections in wiring harness.
-- Refer to P.C. Board
Troubleshooting Procedure.
b. 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.
c. Check in-line connector, P.C. Board,
and wiring harness plugs, especially
leads 667 and 621.
d. Refer to procedure for checking
Voltage Control Potentiometer on
Machine. Check wiring of lead num-
bers 75, 76, and 77.
e. Refer to P.C. Board Troubleshooting
Procedure.