The Pointing Out Of Any Difficulties And Their Elimination; Replacing Front Electronic Circuit Boards - CEA DIGITECH 400 PULSED-TA4 Manual De Instrucciones

Led DL1
Led DL2
LED CONDITION
ON
DL1
OFF
ON
DL2
OFF
OFF
DL4
BLINKING
Error conditions found in the welder are described in this para-
graph and the three displays on the operator's interface (fig. H)
used to view them:
• ERROR Display (abbreviated dE): the wording ERR will flash
on this display;
• ERROR DESCRIPTION Display (abbreviated dDE): flashing
messages alternate on this display giving first the TOTAL
NUMBER of errors (Es. 02) detected and then the general DE-
SCRIPTION of the first error detected (Es. PRG);
• ERROR CODE Display (abbreviated dCE): the number of the
code (4 digits) of the error detected flashes on this display (or
the first error found should there be more than one error).
Table 7 gives eventual error messages eventually appearing on
the various displays and diagnosis of the various errors.
In addition, to facilitate the diagnosis of any eventual problems of
communication with the peripherals, a change has been made to
the leds located on the "digital card cpu front panel" (see table 8
and fig. I)
If there is a loss of communication with the towing unit, in additon
to the signaling of the DL1 led, access will be denied to the MIG/
MAG, PULSED MIG and DOUBLE PULSED MIG welding proc-
ess.
The machine will automatically reset itself from MMA to TIG and
vice versa, while it will be impossible to select the modes that
require the use of the towing unit.
Led DL4
FIG. I
Table 8
MEANING
Comunication with towing unit
absent
Comunication with towing unit
present
Comunication with front panel
absent
Comunication with front panel
present
Control program
inactive
Control program
active
This is done to allow our technical assistance (that should be called
in every time a error message appears on the welder operator's
interface) to be able, in the shortest time possible after being in-
formed by the user, to resolve the problem with greater facility.
The pointing out of any difficulties and
their elimination
The supply line is attributed with the cause of the most common
difficulties. In the case of breakdown, proceed as follows:
1) Check the value of the supply voltage;
2) Check that the power cable is perfectly connected to the plug
and the supply switch;
3) Check that the power fuses are not burned out or loose;
4) Check whether the following are defective:
• the switch that supplies the machine
• the plug socket in the wall
• the generator switch
NOTE: Given the required technical skills necessary for the repair
of the generator, in case of breakdown we advise you to contact
skilled personnel or our technical service department.
Replacing front electronic circuit
boards
DIGITECH 400 PULSED
Proceed as follows:
• Unscrew the 4 screws fastening the front rack panel.
• Remove control dials.
• Extract wiring connectors from electronic control board.
• Unscrew small supporting columns.
• Remove electronic control board by lifting it out of its supports.
• Proceed vice versa to assemble new electronic control board.
TA4
Proceed as follows:
• unscrew the 2 screws on the sides of the panel to loosen it;
• extract the panel pulling it towards you with a gentle movement;
• extract the back connectors;
• unscrew the 4 nuts at the sides of the electronic control board;
• remove the faulty card;
• proceed the other way round for reassembly.
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