Troubleshooting Table - Hobart Welding Products Handler 125 Owner's Manual

7-7. Troubleshooting Table

Trouble
No weld output; wire does not feed; fan
does not run.
No weld output; wire does not feed; fan
motor continues to run.
No weld output; wire feeds.
Low weld output.
Electrode wire feeding stops during
welding.
OM-283007 Page 24
Secure power cord plug in receptacle (see Section 5-7).
Replace building line fuse or reset circuit breaker if open.
Place Power switch in On position (see Section 6-1).
Check supplementary protector CB1, and reset if open (see Section 7-2).
Set the Voltage switch to positions 1, 2, 3, or 4. (see Section 6-1).
Ensure the gun trigger switch is depressed and held (see Section 6-2).
Check if Over Temperature Light PL1 is On. Light goes on and weld output/wire feeding stops when unit
has overheated. To resume welding, allow fan to cool unit until light goes off (see Sections 4-3 and 6-1).
Be sure that Voltage switch is not set between ranges (see Section 6-1).
Disassemble torch handle and check trigger switch lead connections, tighten or reconnect any loose
connections.
Connect work clamp to get good metal to metal contact.
Check cable connection at work clamp and tighten hardware if necessary (see Section 5-2).
Replace contact tip (see Section 7-3). Check that polarity leads are connected.
Connect unit to proper input voltage or check for low line voltage.
Place voltage switch in desired position (see Section 6-1).
Check cable connection at work clamp and tighten hardware if necessary (see Section 5-2).
If using an extension cord, check that wire size and length is the proper size for power rating of welding
power source (see Section 4-2).
Ensure wire spool is not out of welding wire.
Readjust hub tension (see Section 5-5).
Adjust drive roll pressure (see Section 5-9).
Check supplementary protector CB1, and reset if open (see Section 7-2).
Check if Over Temperature Light PL1 is On. Light goes on and weld output/wire feeding stops when unit
has overheated. To resume welding, allow fan to cool unit until light goes off (see Sections 4-3 and 6-1).
Straighten gun cable and/or replace damaged parts.
Change to proper drive roll groove (see Section 7-4).
Replace contact tip if blocked (see Section 7-3).
Clean or replace wire inlet guide or liner if dirty or plugged (see Section 7-4).
Replace drive roll or pressure bearing if worn or slipping (see Section 7-4).
Check and clear any restrictions at drive assembly and liner (see Section 7-5).
Remedy