OM-250 147 Page 27
5-3. Troubleshooting
Trouble
Remedy
No weld output; unit completely inop-
erative; ready light (LED) Off.
Place line disconnect switch in On position (see Section 3-9).
Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section 3-9).
Check for proper input power connections (see Sections 3-8 and 3-9).
No weld output; high temperature light
(LED) On.
Unit overheated causing thermal shutdown. Allow unit to cool with fan On (see Section 3-6).
Reduce duty cycle or amperage.
Check and correct blocked/poor airflow to unit (see Section 3-9).
Erratic or improper welding arc or out-
put.
Use proper size and type of weld cable (see your Distributor).
Clean and tighten weld connections.
Check electrode polarity and reverse if necessary; check and correct poor connections to workpiece.
Fan not operating.
Unit not warmed up enough to require fan cooling.
Check for and remove anything blocking fan movement.
Have Factory Authorized Service Agent check fan motor and control circuitry.
Stick welding problems: Hard starts;
poor welding characteristics; unusual
spattering.
Use proper type and size of electrode.
Check electrode polarity and reverse if necessary; check and correct poor connections.
Make sure a remote control is not connected.
TIG welding problems: Wandering arc;
hard starts; poor welding characteris-
tics; spattering problems.
Use proper type and size of tungsten.
Use properly prepared tungsten.
Check electrode polarity and reverse if necessary.
TIG welding problems: Tungsten elec-
trode oxidizing and not remaining bright
after welding.
Shield weld zone from drafts.
Check for correct type shielding gas.
Check and tighten gas fittings.
Check electrode polarity and reverse if necessary.
Notes
Work like a Pro!
Pros weld and cut
safely. Read the
safety rules at
the beginning
of this manual.
