Thermal Arc 180 AC, User Manual

Page: 33 / 36

Notice NOT 034
THERMAL ARC 180 AC/DC
Rev : 00
Date : 03/12/02
MAINTENANCE
USER’S MANUAL
Page
3 3/36
DIGITAL DISPLAY SHOW « CO » AND ORANGE INDICATOR F20 ON
= COOLING UNIT DEFAULT
(if a cooling unit is connected)
Lack of water Check the water level
Water circuit blocked up Check the torch
DIGITAL DISPLAY SHOW « AC » AND ORANGE INDICATOR F20 ON
=AC SECONDARY CIRCUIT DEFAULT
AC current frequency too high Reduce AC current frequency
Torch length too long Reduce torch length
Stop the machine and restart it
IMPROPER WELDING
Wrong electrode polarity Use the right polarity according to the indications of
electrode’s manufacturer
IGNITION FAILURE
Wrong polarity Check the connection
Torch to power terminal
–
Ground to power terminal +
Pre gas time selected You must wait for the end of the pre gas flow or
cancel it
No gas arrives to the machine Check the gas supply
No gas goes out of the machine Check the gas valve
Initial current too low Check the value of initial current (see chapter 14)
In pulse current welding, arc is on and off
= low current too low Check the low current value