d) Once ensured the correct liquid flowing, restore the original hose.
2.4.5 Output Welding Conditions, Short Circuit or Welding Over Limits
A circuit test is released every time you switch "ON" the machine. The correct output
polarities are checked-out and in case of eventual short circuit detection, machine
enters in alarm standby showing on the display:
Once short circuit conditions are removed, machine test will continue correctly.
Short circuit conditions may appear even during the welding job: in case they persist
continuously for more than 5 sec, generator enters in "short circuit alarm". The "anti
sticking" icon lights too.
Fires, burns and shocks may be caused by uncorrected current outputs.
The GRAND MIG PULSE series generators are characterized by a duty cycle -
100%@400A, 60%@500A, 40%@600A at 40°C and power supply may, in certain
cases, be sufficient for this output but the user can adjust higher power output causing
damages on the existing supply network or can choose the cable at maximum output
current.
2.4.6 Protection from Inverter Failure
The bus voltage has a feedback to the main control. When the voltage is lower than
150V DC, the machine stops working, the led of "DC BUS FAIL" on the power source
front panel will light on. And the main relay of the power source would turn off.
2.4.7 Communication with the External Wire Feeder
The external wire feeder can be connected to the connectors of the back panel of the
machine, the machine recognize the wire feeder and starts to communicate.
The control from the machine is passed to the wire feeder when the torch switch of the
wire feeder is pressed.
When an error in the communication between the machine and the wire feeder ap-
pear, the two display of the wire feeder show three lines "
---
" instead the values, this
problem often occurs when the interconnecting cable connectors are loose or internal
wires of the interconnecting cable are open.
See the failures and solutions in "
10 Trouble Shooting
" for details.
25
