Miller PipePro XC, Owner'S Manual

Page: 55 / 72

OM-269631 Page 49
7-10. Welding Power Source Troubleshooting
Trouble Remedy
No weld output; unit completely in-
operative.
Place line disconnect switch in On position (see Section 5-11).
Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section 5-11).
Check for proper input power connections (see Section 5-11).
No weld output; meter display On. Check, repair, or replace remote control.
Unit overheated. Allow unit to cool with fan On.
Check voltmeter/ammeter Help displays.
Erratic or improper weld output.
Use proper size and type of weld cable (see Section 5-9).
Clean and tighten all weld connections.
Check work sense lead. Straighten any coiled cables.
No 24 volts AC output at Remote 14
Feeder receptacle.
Reset supplementary protector CB2.
When remote control is connected to
unit output is always on.
Check remote control switch and potentiometer resistances.
!
Disconnect power before troubleshooting.
7-11. Wire Feeder Troubleshooting
Trouble Remedy
Wire feeds, shielding gas flows, but
electrode wire is not energized.
Check cable connections. Check cables for continuity, and repair or replace cables if necessary.
Wire feeder is on, display does not light
up, motor does not run, gas valve and
welding power source contactor do not
pull in.
Check and reset circuit breaker at welding power source.
Electrode wire feeding stops, or feeds
erratically during welding.
Check gun trigger connection. See gun Owner’s Manual.
Check gun trigger. See gun Owner’s Manual.
Readjust hub tension and drive roll pressure.
Change to correct size drive roll (see Table 9-1).
Clean or replace dirty or worn drive roll.
Incorrect size or worn wire guides.
Replace contact tip or liner. See gun Owner’s Manual.
Remove weld spatter or foreign matter from around nozzle opening.
Have Factory Authorized Service Agency check drive motor or motor control board PC1.
Motor runs slowly. Check for correct input voltage.
Wire feeder displays light up, feeder
jogs, purges, but unit is inoperative.
Check welding gun trigger leads for continuity, and repair leads or replace gun.
When triggered, wire feeds but no gas,
no contactor.
If the welding arc does not establish in 2 seconds after the gun trigger is activated the unit will feed
wire, but turns off contactor and gas valve. If the gun trigger is still activated after 60 seconds or 30 ft
(9.1 m) of wire was fed from the gun, the wire will stop feeding.