CEBORA S.p.A.
17
3.4.6
- 54 - Short-circuit between torch and workpiece upon start-up.
Upon power source start-up this test checks the operating conditions by performing a brief
test to generate the open-circuit output voltage. While this is taking place it is important that the
torch not touch the workpiece or welding bench.
The following conditions may be detected during this test:
−
Output voltage present and output current present = error 54;
−
Output voltage present and output current absent = correct operation;
−
Output voltage absent and output current present = error 54;
−
Output voltage absent and output current absent = error 10.
Error 54 indicates a possible short-circuit or isolation leak in the power circuit downstream of
the diode group or at power board (32) output.
Check the wiring between power (H) output terminal and terminal J7 of power board
(32) and wiring between terminals 9(+) and 10(-) of J1 control board (29) and terminals 9(+) and
10(-) of J1 power board (32).
Check inductor (28) integrity and correct connection.
If you find defective connections, fix and replace any damaged components.
Replace the control (29) and/or power (32) boards.
3.4.7
- 56 - Short-circuit at the output lasts too long (max. allowable time = 1 sec.).
It is normal to detect short-circuits at the output during welding, as long as they do not last
beyond a given interval. “Error 56” indicates that the short-circuit has exceeded this limit.
This situation can be determined also from the short circuit created between wire nozzle and
gas nozzle on the MIG torch, because of the warehouse of dirt or metallic powder.
In MMA it can derive also from the output voltage detection line interruption.
In any case, beyond to the torch cleaning, to check:
−
connection between power output terminal and terminal J7 of power board (32);
−
wiring between terminals 9(+) and 10(-) of J1 control board (29) and terminals 9(+) and 10(-)
of J1 power board (32);
−
integrity and corrected connection of inductor (28).
If you find defective connections, fix and replace any damaged components.
Replace the control (29) and/or power (32) boards.
3.4.8
- 57 - Wire feeder motor (31) current too high.
The control board (29) is equipped with a motor (31) feeding current limitation circuit, to
protect it against eventual overloads, and with a circuit that reveals when the participation of the
limiter is uninterrupted, in order to evidence an extended overload.
Such overload is determined mostly from mechanical causes, which dirt in the gears of the
gearbox, hardness’s from lubrication lack, wire coil dragging difficulty, throttling in the wire
sheath long the cable torch, etc.
Therefore carry out the motor gear box group cleaning, and check if in the no wire operation
the problem is still present. In this case the deterioration of the motor winding or the
mechanically connected gear box can be assumed, for which replacing motor (31) or mechanical
gear box.
If necessary, carry out the WIRE FEEDER MOTOR (31) TEST, par. 3.3.6.
3.302.233
22/09/2008
