300M / 350M / 400M / 500M / 650M
37
7 – MAINTENANCE
MIG machines do not need special cares of maintenance, however, it is recommended a periodically inspecting and cleaning
operation. The frequency of this operation must be in according to the environment values of dust or humidity. It must be made as
follows:
- Disconnect the machine from the mains supply.
- Remove lateral covers.
- Clean all dust or humidity with a low pressure and dry air flow.
- Well retighten all electrical contacts (bolts and nuts).
- Also the torch must be periodically inspected. During operation it is subjected to high temperatures. To obtain more information
about torch maintenance it is recommended to read the respective user's manual.
IMPORTANT !
DO NOT INSTALL, OPERATE OR MANTAIN THIS APPLIANCE BEFORE READ THIS USER'S GUIDE.
THE EQUIPMENT MUST BE INSTALLED, OPERATED OR MAINTAINED ONLY BY QUALIFIED PERSONS.
DAMAGE
CAUSE
REPAIR
The machine does not weld when
connected the main switch.
Failure on main voltage
Check main supply voltage and protective
electrical circuits.
Blowed command circuit fuses.
Check and replace, if necessary.
Interruption of the primary cable.
Check and replace, if necessary
Irregular advance of wire
Low pressure of rolls.
Adjust the pressure system.
Wire guide damaged or in bad condition.
Clean properly and replace, if necessary.
Diameter rolls do not match with wire
diameter.
Replace rolls with the adequate diameter.
Wire coil breakage system too much
tightened.
Adjust with the adequate pressure
Damaged wire or wire coil.
Check and replace, if necessary.
Porosity in welding melt.
Gas failure
Check the bottle pressure and control de gas
flow.
Solenoid valve blocked
Check and, if necessary, disassemble for
cleaning.
Too much wind blowing through the welding
zone.
Protect the welding zone from wind or adjust up
the gas flow.
Torch nozzle blocked or in bad condition.
Clean or replace the torch nozzle.
Welding piece too dirty, wet or greased.
Clean the welding surfaces.
Failure of the welding quality.
Defective electrical contact of earth clamp or
torch.
Well tighten the earth clamp and torch. Check
the earth cable.
Failure on electrical contactor.
Disassemble and clean electrical contactor. If
not possible, replace contactor.
Damaged rectifier bridge.
Check bridge and replace, if necessary.
The wire feed motor do not run.
Failure of the wire feed motor electrical supply.
Check and replace, if necessary the wire feed
motor fuse. Check the electrical insulating of the
wire feed motor.
Failure of wire feed motor brushes.
Replace brushes.
