Unitec Peco HF25A, User Manual

Page: 75 / 177

CHAPTER 5. MAINTENANCE
HF25D DC RESISTANCE WELDING SYSTEM
990-333 5-5
Alarm Message Description Corrective Action
FIRING DIDN’T
CLOSE IN 10
SECONDS The Firing Switch on a Unitek air
actuated weld head did not activate
within 10 seconds after the Foot Switch
was initially activated. Press RUN and readjust the air pressure to the
Unitek air actuated weld head.
ILLEGAL
SECURITY CODE
ENTERED The wrong security code was entered to
de-activate the System, Schedule, or
Calibration Lock protection features. Press MENU, select System Security, then enter
the correct access code to turn off System,
Schedule, or Calibration Lock protection
features.
NOTE: Entering a security code of 280 will
always unlock the system.
INHIBIT CONTROL
SIGNALS
ACTIVATED The Inhibit input control signal is
activated, preventing the HF25/26 from
continuing to operate.
NOTE: Activating the Inhibit input
terminates only future operations. It does
NOT terminate any present HF25/26
operation.
Remove the Inhibit signal condition preventing
further HF25/26 operation.
NOTE: The correct removal action depends on
how the control signal I/O logic was
programmed by the user.
INPUT TOO LARGE The user has attempted to program a
weld energy or time that exceeds the
capability of the HF25/26. Re-program welding parameters to be within the
capability of the HF25/26.
INPUT TOO SMALL The user has attempted to program a
weld energy or time that is below the
capability of the HF25/26. Re-program welding parameters to be within the
capability of the HF25/26.
LOAD
RESISTANCE TOO
HIGH The total electrical resistance, comprised
of the weld cables, weld head, and parts
to be welded, has exceeded the drive
capability of the HF25/26.
The HF25/26 will not be able to
maintain the user set weld parameters. Reduce the total electrical resistance by reducing
the weld cable length.
Reduce the total electrical resistance by
increasing the weld cable diameter.
Check cable and weld head connections.
Verify that all three phases from the input power
lines are functioning
LOW BATTERY The battery supplying backup power to
the HF25/26 internal memory is out of
energy. Replace the memory battery on the Main Control
PCB.
CAUTION: Replace the battery while power is
ON, otherwise all memory contents will be lost.
LOWER LIMIT
GREATER THAN
UPPER LIMIT The user has tried to program a Lower
Limit value that is greater than the Upper
Limit value for Weld1 or Weld2 time
periods. Re-program the invalid Lower Limit value.