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This table describes some of the typical problems you may see in
the field. The recommended procedure to troubleshoot each
problem is provided.
Problem
Possible Cause
Possible Solution
Circuit breaker
trips on power-
up.
SHUNT TRIP output on the I/O is
becoming active.
If NO, replace output module.
If YES, check the following:
- Primary transformer cables grounded?
- SCR breaking over at low potential, or
shorted?
Firing card is faulty.
Replace firing card.
Circuit breaker is faulty.
Replace circuit breaker.
Circuit breaker
trips while
welding
The magnetic trip on the circuit
breaker is set too low. (This causes
the control to trip during the weld time
of a schedule.)
Adjust the circuit breaker’s magnetic trip
threshold.
The SCR is breaking over at low
potential or shorted.
Replace SCR.
SHUNT TRIP output on the I/O
module is active when the SCR is not
shorted.
Faulty firing card or I/O module. Replace
as necessary.
Faulty firing card.
Replace firing card.
Intermittent ground.
Replace circuit breaker.
Содержание MedWeld 3005
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