Specifications

Poor quality welds: burnt spots
with cavities
Weak welding current.
Overheating of welding cables
Uneven “sticking” of dent pulling
electrodes and washers.
Steel sheet under ground shoe
overheats or burns.
Dirty sheets (paint, primer, filler,
excessive rust, etc.)
Too low electrode force.
Worn electrodes.
Poor quality welding primer.
Wrong settings.
Inadequate power supply.
Poor connections.
Incorrect ground shoe position.
Inadequate cooling.
Incorrect settings.
Damaged electrodes requiring too
much current.
Welding rate too fast.
Uneven pressure during welding.
Insufficient contact zone or insuffi-
cient pressure under ground shoe.
Clean and remove excess paint, filler or rust.
Increase welding effort.
Clean, dress or replace electrodes.
Use only high quality zinc welding primer “Saitek Z-Coat”.
DO NOT use a copper or aluminum-based primer.
Reduce welding time and increase welding power.
Inadequate electrical supply, too low initial voltage or
important drop of voltage during weld resulting in high sup-
ply amperage. Have installation checked (initial voltage,
length, size of wire, tightening of connections, etc.). Check
if several machines are not connected on same line and
operating simultaneously.
Check that all connections are tight. (Welding cables on
gun, pistol and ground and on transformer output.)
Make sure ground shoe is close to spot of weld and that it
is on bottom sheet and not on sheet where weld is to be
completed. Check temperature of sheet between spot of
weld and ground shoe. A temperature elevation of approx-
imately 40° F after 4 spots indicates a poor return of cur-
rent.
Check air pressure (70 PSI or 5 bars minimum). Make sure
air flows in cable. Let cables cool approximately 15 min-
utes and place cable cooling control on “manual” to allow
air flow from beginning of task if machine has to be used
for a long time. On automatic control position, the cooling
starts when cables begin to get hot.
Reduce welding time and increase welding current.
Clean, dress or replace electrodes.
Reduce welding rate.
Maintain constant pressure.
Current must be spread spread evenly under ground shoe.
If steel sheet is thin, place a piece of metal between bot-
tom of steel sheet and bottom jaw of ground shoe clamp
to provide a larger contact surface.
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CHIEF 2000 HERTZ DC INVERTER WELDER
USERS MANUAL
Fault Possible Cause Remedies
Diagnosis And Remedies..........continued
15