Troubleshooting Table - Hobart Handler 125 EZ Owner's Manual

6-8. Troubleshooting Table

Trouble
Electrode wire feeding stops during
welding. welding
No weld output; wire does not feed; fan
does not run. does not run
No weld output; wire does not feed; fan
motor continues to run.
No weld output; wire feeds.
Low weld output.
OM-923 Page 24
Straighten gun cable and/or replace damaged parts.
Adjust drive roll pressure (see Section 4-7).
Change to proper drive roll groove (see Section 6-4).
Readjust hub tension (see Section 4-4).
Replace contact tip if blocked (see Section 6-5).
Clean or replace wire inlet guide or liner if dirty or plugged (see Section 6-4).
Replace drive roll or pressure bearing if worn or slipping (see Section 6-4).
Check and clear any restrictions at drive assembly and liner (see Section 4-7).
Release gun trigger and allow gun and motor protection circuitry to reset.
Have nearest Factory Authorized Service Agent check drive motor.
Secure power cord plug in receptacle (see Section 4-5).
Replace building line fuse or reset circuit breaker if open.
Place Power switch in On position (see Section 5-1).
Reset welding power source supplementary protector if open.
Thermostat TP1 open (overheating). Allow fan to run with gun trigger switch off; thermostat resets when
unit has cooled (see Section 3-2).
Be sure that Material Thickness Selector switch is not set between ranges (see Section 5-1).
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 4-1).
Replace contact tip (see Section 6-5).
Connect unit to proper input voltage or check for low line voltage.
Place Material Thickness Selector switch in correct setting (see Section 5-1).
If using an extension cord, check that wire size and length is the proper size for power rating of welding
power source (see Section 3-1).
Remedy