OM-262379 Page 25
7-4.
Troubleshooting
Trouble
Remedy
Wire does not feed; open-circuit voltage
available.
Check power switch S1 and connections, and replace if necessary.
Check supplementary protector CB1. Reset CB1.
Unit overheated. Allow unit to cool.
Check sensing lead connection.
Check gun trigger plug connection.
Check gun trigger. See gun Owner’s Manual.
Have Factory Authorized Service Agent check Motor Control Board (PC1).
Wire feeds erratically.
Readjust hub tension (see Section 5-7).
Readjust drive roll pressure (see Section 5-7).
Clean or replace dirty or worn drive roll (see Section 5-2).
Remove weld spatter around gun nozzle opening.
Replace contact tip or liner. See gun Owner’s Manual.
Change to correct size and type drive roll (see Section 5-2)
Check that DIP switches on Motor Control Board (PC1) are set correctly (see Section 5-8)
Have Factory Authorized Service Agent check Motor Control Board (PC1).
Motor runs slowly.
When soft start is on, motor will run slow until weld current is sensed by HD1.
Readjust hub tension (see Section 5-7).
Check if wire speed dual schedule switch is activated (if applicable, See Section 6-3)
Check and replace contact tip or liner if necessary. See gun Owner’s Manual
Check that DIP switches on Motor Control Board (PC1) are set correctly (see Section 5-8)
Have Factory Authorized Service Agent check Motor Control Board (PC1).
Unit does not switch out of Soft Start.
Check transducer HD1 and connections, and replace if necessary.
Wire feeds when Jog switch is pressed
but not when gun trigger is pressed.
Check gun trigger connection at wire feeder. Check gun trigger leads and trigger switch. See gun Owner’s
Manual.
Have Factory Authorized Service Agent check Motor Control Board (PC1).
Wire stubbing on low end using a con-
stant current power source or feeder
resets.
Make sure CC/CV switch is in CC position (see Section 6-1 or 6-2).
Increase power source inductance setting if available.
Increase output setting of power source or decrease wire feed speed.
Gas does not flow or does not stop
flowing; wire feeds.
Clear blockage in gas hose or replace hose.
Clear blockage in welding gun.
Clear blockage in filter (see Section 7-3).
Check gas valve.
Check coil voltage and connections of gas valve GS1. Check continuity of coil. Replace GS1 if necessary.
Have Factory Authorized Service Agent check Motor Control Board (PC1).
Wire remains energized after trigger is
released.
Check setting of trigger hold switch, if applicable.
Check contactor W1 to see if contacts are frozen closed.
