Product Manual
CS
M
40.1
REV.0-02/11
Trouble shooting
07/02/11 M40CT_GB
PROBLEM ASSOCIATED SYMPTOMS POSSIBLE CAUSE VERIFICATIONS WHAT TO DO
P1 No welding arc
(applicable
only to ma-
chines with
WAC)
No open circuit voltage Failed power supply wi-
thin the welding control
board (WAC)
With the machine running, by means of a multimeter, check if there is a
voltage of 5VDC ± 0,125V between the contacts A (-) and C (+) on the
circular connector of the WAC. In case of lack of voltage or condition not
satised consider the suggested action.
Replace the welding control board of the
WAC
P2 No welding arc
(applicable
only to ma-
chines with-
out WAC)
No open circuit voltage Failed power supply wi-
thin the welding control
board (WAC)
With the machine running, by means of a multimeter, check if there is a
voltage of 5VDC ± 0,125V between the contacts 1 (-) and 2 (+) on the
circular connector of the front panel, after having set the remote control
switch in ON position.
In case of lack of voltage or condition not satised consider the sugge-
sted action.
Replace the welding control board
P3 No welding arc No open circuit voltage Failure in the control or
drive circuits of the wel-
ding control board
In order to check the proper operation of these circuits it is necessary to
use specic test and troubleshooting tools. Anyway, a visual inspection
coul be enough to localise possible damages caused by a failure. In case
of evidence of damages consider the suggested action.
Replace the welding control board
ATTENTION
For the CS 230 only, there is a risk of fai-
lure propagation towards the chopper.
Before replacing this board please check
that the chopper works properly. If not re-
place both.
P4 Lack of welding
current control
Full welding power (without
current control) regardless
of the knob position
Failure in the control or
drive circuits of the wel-
ding control board
In order to check the proper operation of these circuits it is necessary to
use specic test and troubleshooting tools. Anyway, a visual inspection
coul be enough to localise possible damages caused by a failure. In case
of evidence of damages consider the suggested action.
Replace the welding control board
ATTENTION
For the CS 230 only, there is a risk of fai-
lure propagation towards the chopper.
Before replacing this board please check
that the chopper works properly. If not re-
place both.
P5 No welding arc No open circuit voltage or
welding available current
low or negligible.
With auto-idle installed, the
r.p.m. never slows-down to
idle.
Hall sensor failed Disconnect the Hall sensor from the welding control board (on the WAC
or within the electrical box, as applicable) and check that, in this condi-
tion, the open circuit voltage reading is correct. When the VRD is instal-
led, the voltage goes to VRD value.
If a resistive load bank is available, check that it is possible draw power
(do not exceed 100A). If the Auto-idle is installed, in this condition the
machine does not exit the idle.
In any case, don’t try to weld with the Hall sensor disconnected.
If the test gives positive result, consider the indicated action.
Replace the Hall sensor