Accessories Table; Description Of Gr54 Cooling Unit - Cebora SOUND MIG 3840/T Pulse Service Manual

CEBORA S.p.A.
The following accessories may currently be connected to the connector (BB):

2.5.1 - Accessories table.

Art.
1243
1265
Foot control + adapter
193 +
1191
187 + Remote control +
1191 + 1192 adapter extensions.
1245 MIG Torch up/down.
The central adapter (BA)(222) for MIG or TIG torches is located on the front panel of the
wire feeder; the adapter includes a power socket, two contacts for the start command, and a
pneumatic fitting for gas.

2.6 - Description of GR54 Cooling Unit.

The GR54 cooling unit is completely dependent from MIG 3840/T Pulse power source from
which receives the supply voltage. Its components are directly connected to the power source
boards.
Due to the autotransformer (540) adapter effect (400/230 Vac) the supply voltage is 230 Vac.
The coolant pump (125), and the fans (131) are managed by control board (543) through relay
RL2 on the pre-charge board (562).
The pressure switch (127), inserted in the hydraulic circuit on the pump (125) delivery,
provides the isolated signal for the fluid pressure to the control board (543) through pre-charge
board (562).
At the power source start up, if the cooling unit is set in continuous or automatic mode (see
Instruction Manual), the pump (125) and fans (131) will operate for 30 seconds, to fill the torch
tubes and check the pressurization of the hydraulic circuit; if no welding command is received
from the operator, they will then stop awaiting a new start command.
If the pressure switch (127) does not detect the appropriate pressure with pump (125) and fans
(131) working on, the control board (543) orders the power source blocked, with relative error
code indication on control panel (see error code, par. 3.7).
In automatic mode the pump (125) and fans (131) enter start running at MIG or TIG welding
beginning, and stop 3 minutes after welding has stopped.
In continuous mode the pump (125) and fans (131) are always kept running. Only the
eventual lack of pressure can stop them together to the generator.
In the MMA process, cooling unit operation is disabled.
The factory set-up of the cooling unit is "OFF", for which to the first use of the welding
system, or after a procedure of "Factory set-up", is necessary to modify such set-up (see
Instruction Manual).
3.302.191
Description art.
MIG torch
TIG torch
extension
(193 no start).
Active signals.
Start (from central adapter
(BA)).
Start (from torch (BA)) +
current adjustment (193).
Start (from torch (BA)) +
current adjustment (187).
Start +
up/down speed +
up/down current.
Torch recognition signal
(pins 16-15 of BB).
0 Vdc ((BB) free).
0.25 Vdc +/- 0.1.
1 Vdc +/- 0.1.
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