Filter
Top Products
OM-206 Page 20
5-3. Troubleshooting
Trouble Remedy
No weld output; unit completely inop-
erative.
Be sure Power switch is On (see Section 4-6).
Secure power cord plug in receptacle (152 model) (see Section 3-7).
Be sure line disconnect switch is On (see Section 3-9).
Check line fuse(s) and replace if necessary. Reset circuit breakers (see Sections 3-7 or 3-9).
Check for proper input power connections (see Sections 3-7 or 3-9).
No weld output; fan motor FM running
and pilot light on.
Check position of Output (Contactor) switch (see Section 4-2).
Thermostats TP1 and/or TP2 open (overheating). Allow fan to run; thermostat(s) closes when unit
has cooled (see Section 2-3).
Low weld output with no control. Check position of Amperage Control switch (see Section 4-3).
Have Factory Authorized Service Station/Service Distributor check control board PC1.
Limited output and low open-circuit
voltage.
Check incoming power for correct voltage. Replace line fuse if open or reset circuit breaker (see Sec-
tions 3-7 or 3-9).
Check for proper input and output connections (see Sections 3-2, 3-4, and 3-7 or 3-9).
Erratic or improper weld output. Tighten all welding cable connections (see Sections 3-2 and 3-4).
Check for proper size and type of cable (see Section 3-2).
Check for proper input and output connections (see Sections 3-2, 3-4, and 3-7 or 3-9).
Replace electrode (see Section 7).
Arc not forming when using Lift-Arc. Check electrode and workpiece, clean as needed to allow good contact.
Fan motor FM does not run. Check and clear blocked fan blade; be sure blade is secure on shaft.
Have Factory Authorized Service Station/Service Distributor check fan motor FM.
Wandering arc; poor control of arc di-
rection.
Reduce gas flow rate.
Select proper size tungsten (see Section 7-1).
Properly prepare tungsten (see Sections 7-2 and 7-3).
Tungsten electrode oxidizing and not
remaining bright after conclusion of
weld.
Shield weld zone from drafts.
Increase postflow time.
Check and tighten all gas fittings.
Water in torch. Refer to torch Owner’s Manual for part(s) requiring replacement, and repair torch as
necessary.