Troubleshooting - Hobart Welders EZ-TIG 165I Manuel Du Propriétaire

6-3. Troubleshooting

Trouble
No weld output; unit completely
inoperative.
No weld output; unit on.
Unit provides only maximum or
minimum weld output.
Erratic or improper weld output.
No control of weld output.
Lack of high frequency; difficulty in
starting GTAW arc.
Wandering arc − poor control of
direction of arc.
Tungsten electrode oxidizing and not
remaining bright after conclusion of
weld.
Fan not operating.
No weld output; fan does not run.
No weld output; fan on.
Fan not operating; weld output
available.
Power LED flashes.
Output On LED flashes.
OM-245 020 Page 18
.
The remedies listed below are recommendations only. If these remedies do not fix the
trouble with your unit, have a Factory Authorized Service Agent check unit.
There are no user serviceable parts inside unit.
Place machine power switch in On position (see Section 5-1).
Place line disconnect switch in On position (see Section 4-5).
Check and replace line fuse(s), if necessary (see Section 4-5).
Check for proper input power connections (see Section 4-5).
Check, repair, or replace remote control.
Have Factory Authorized Service Agent check unit.
Make sure Material Thickness/amperage control is in proper position (see Section 5-1).
Have Factory Authorized Service Agent check unit.
Lay weld cables out straight, do not leave weld cables coiled.
Check position of Material Selector switch (see Section Figure 5-1).
Check position of Material Thickness/amperage control (see Section 5-1).
Make sure Material Thickness/amperage control is in proper position (see Section 5-1).
Select proper size tungsten (see Section 9-1).
Be sure torch cable is not close to any grounded metal.
Check cables and torch for cracked insulation or bad connections. Repair or replace.
Reduce gas flow rate (see Section 4-3).
Select proper size tungsten (see Section 9-1).
Properly prepare tungsten (see Section 9-2).
Shield weld zone from drafts.
Check and tighten all gas fittings.
Properly prepare tungsten (see Section 9-2).
Unit equipped with Fan-On-Demandt. Fans run only when necessary. Unit equipped with circuitry to
protect against overheating.
Place line disconnect switch in On position (see Section 4-5).
Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section 4-5).
Check for proper input power connections (see Section 4-5).
Be sure Material Selector switch is set in position (see Section 5-1).
Check connection to remote control receptacle (see Section 4-2).
Check remote control (see remote control Owner's Manual).
Unit overheated. Allow unit to cool (see Section 3-5).
Check for and remove anything blocking fan movement.
Have Factory Authorized Service Agent check fan motor.
Input voltage out of usual range of 230 volts 10%.
Unit has overheated. Do not use until LED stops flashing (see Sections 3-5 and 5-1).
Remedy