WTC MedWeld 3005, Operator'S Manual

Page: 132 / 206

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ISO CNTR ERR-BRKR TRIPPED: (FAULT)
This fault is generated when the MedWeld 3005 signals to
open the isolation contactor (to cut off weld current) but the
isolation contactor did NOT open. It can also occur if the
isolation contactor is pulled in when a weld initiate is not
present.
NO ZERO CROSSING SYNC: (FAULT)
This condition is generated when the control is unable to
synchronize with the line voltage. This parameter is NOT
programmable. This fault is observed when the circuit
breaker is turned off or tripped.
LOW BATTERY: (FAULT) (ALERT)
A battery back-up maintains RAM integrity while the control
is powered down. This condition is generated when the
control detects that the battery’s charge is low. To clear this
fault. replace the battery within 30 to 60 days.
HIGH C-FACTOR LIMIT: (FAULT) (ALERT)
LOW C-FACTOR LIMIT: (FAULT) (ALERT)
These two conditions indicate that the actual C-Factor read
during the weld exceeded or fell below the values
programmed in the C-Factor function (C-FACTOR LIMIT:
HI=nnn LOW=nnn).
The low limit is helpful to detect cable and connection
deterioration. The upper limit can detect secondary bridges
and shunting paths. (Refer to “C-Factor” on page 5-1 for
more information.)
SYSTEM COOLING: (FAULT)
This fault is generated if the control receives a valid weld
initiate and the TRANSFORMER OVER-TEMPERATURE/
SYSTEM COOLING input is not active. This fault is also
generated if the SCR thermal switch is tripped.
HEAT CYCLE LIMIT: (FAULT) (ALERT)
This fault is generated when the control detects that the
number of consecutive weld cycles where conduction
occurred exceeded the limit programmed in the Heat Cycle
Limit (0=SEAM) setup parameter.
When the limit is exceeded, the weld schedule is finished in
No Weld Mode. The control generates a HEAT CYCLE LIMIT
fault.