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MANUAL 0-2510
4.0 BASIC TROUBLESHOOTING
General
Troubleshooting and repairing this unit is a process which should be
undertaken only by those familiar with high voltage, high power electronic
equipment.
WARNING
There are extremely dangerous voltage and power levels present inside
this unit. Do not attempt to diagnose or repair unless you have had train–
ing in power electronics measurement and troubleshooting techniques.
4.01 Common Welding Operation Faults
The following are some of the more common operating faults that occur
during welding operations:
A. Power
Main power not connected
Main power not turned on
MAIN CIRCUIT BREAKER set of OFF position
INPUT SELECTOR (Easy Link) Switch in wrong position
B. Poor Weld
Wrong polarity
Wrong electrode used
Electrode not properly prepared
Incorrect welding amperage setting
Speed too slow or too fast
Incorrect switch settings for intended operation
Poor weld output connection(s)
C. Remote Operation
Incorrect contactor switch settings
Remote not connected
If the problem is not resolved after checking the above, the following guide
may suggest more specific items to check given the faulty operating
symptom(s) you are experiencing.
4.02 Specific Problems
How to Use This Guide
The following information is a guide to help you determine the most likely
causes for various symptoms.
This guide is set up in the following manner:
A. Symptom (Bold Type)
Any special instructions (Text Type)
1. Cause (Italic Type)
a. Check/Remedy (Text Type)
Locate your symptom, check the cause(s) (the simplest or most likely is
listed first), then perform the remedy given. Repair as needed being sure to
verify that the unit is fully operational after any repairs.
BASIC TROUBLESHOOTING
Summary of Contents for Thermal Arc 400GMS CC
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