ULTRAFEED VAF-4
5-4 TROUBLESHOOTING Manual 0-5332
FAULT
CAUSE
REMEDY
2 Error Code is
displayed and yellow
fault indicator is lit
when Wirefeeder is
turned ON.
Error condition present.
Refer to Error Codes and Remedies Table
in Section 5.01.
3 Power Indicator light
is not lit but welding
arc can be established.
Faulty Indicator light on Display
PCB2.
Replace PCB2.
4 Power ON Indicator
light is lit but when
the Gun trigger switch
is depressed nothing
happens.
A
B
C
Torch trigger switch leads are
disconnected.
Faulty trigger switch/lead.
Defective Motor Control PCB1
A
B
C
Re connect Torch trigger switch leads.
Remove the Trigger connector from Front
Panel P3 connector. Use a jumper on
P3 connector between pins 1 to 2. If gas
flows, problem is in MIG Gun.
Measure P3 Front Panel connector Pin 1
to 2 for 15VDC. If voltage is not present,
follow signal back to P3 connector
on PCB1. If no voltage on PCB1 P3
connector , replace PCB1. If voltage is
present, jumper P3 Pin 1 to 2. If gas
flows and motor turns, there is an open
connection to the front panel P3 trigger
connector.
5 Power indicator is
ON, no wire feed but
gas flows from the
MIG Gun when the
Gun trigger switch is
depressed.
A
B
C
D
Preflow is operating
Wire feedability issue
Faulty Motor Control PCB1
Defective Feed Motor M1
A
B
C
D
Adjust preflow time setting. Refer to
Section 4.03.
If motor shaft turns but wire does not
feed then check the following:
1) Excessive Wire Spool Brake tension
2) Excessive Feed Roll pressure
3) Damaged or incorrect Feed Roll
4) Damaged wire guide
5) Damaged or incorrect size MIG gun
liner
6) Damaged or incorrect size MIG gun tip
7) Wire spool problem - wire does not
feed smoothly off from spool.
Measure for DC voltage on PCB1 between
P7 to P11 connector. If no voltage is
present , replace PCB1
Replace Motor M1.
