Miller Intellx Pro, Owner'S Manual

Page: 41 / 52

OM-279248 Page 37
7-4. Troubleshooting
!
Disconnect power before troubleshooting
Trouble Remedy
Wire feeds, shielding gas flows, but
electrode wire is not energized.
Check and secure weld cable connections (see Section 5-2).
Electrode wire feeding stops or feeds
erratically during welding.
Check welding gun trigger connection. See gun Owner’s Manual.
Check welding gun trigger. See gun Owner’s Manual.
Readjust hub tension and drive roll pressure (see Section 5-12).
Change to correct size drive roll.
Clean or replace dirty or worn drive roll.
Incorrect size or worn wire guides.
Replace contact tip or liner. See welding gun Owner’s Manual.
Remove weld spatter or foreign matter from around nozzle opening.
Wire feeder power is on, displays light
up, but unit is inoperative.
Check welding gun trigger connection at wire feeder.
Check welding gun trigger leads and trigger switch. See welding gun Owner’s Manual.
Unit completely inoperative- no display. Turn Power switch On (see Section 6-3).
Check ArcConnect cable connection at wire feeder and power source.
Check supplementary protector at power source. See power source Owner’s Manual.
Wire feeds when Jog switch is pressed
but not when gun trigger is pressed.
Check welding gun trigger connection at wire feeder. Check gun trigger leads and trigger switch. See gun
Owner’s Manual.
Wire does not feed until trigger is
pressed but continues to feed after trig-
ger is released. Wire feeds as soon as
power is applied.
Check for short between gun trigger leads and weld cable. Repair or replace gun trigger leads.
Gas does not flow; wire feeds. Check gas supply.
Check gas flowmeter.
Check gas hose for damage or loose connections.
Check for blockage in gas filter (see Section 7-2).
Check for blockage in welding gun.
Erratic or improper weld output. Use proper size and type of weld cable.
Clean and tighten all weld connections.
Check for correct polarity or welding circuit.
Poor weld cable layout. See (Section 5-4) for recommended cable arrangement.
If using weld voltage sense lead, verify cable and connections. Repair or replace as needed.
.
Do not leave unused lead connected to the weld voltage sense terminal.