CHIEF MultiMig 511, Instruction Manual, Page: 3 / 24

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1.2 Protect yourself from electric shock by insulating
yourself from work and ground.
1.3 Disconnect input plug or power before working on
machine.
2 Breathing welding fumes can be hazardous to your
health.
2.1 Keep your head out of fumes.
2.2 Use forced ventilation or local exhaust to remove fumes.
2.3 Use ventilating fan to remove fumes.
3 Welding sparks can cause explosion or fire.
3.1 Keep flammable materials away from welding.
3.2 Welding sparks can cause fires. Have a fire extinguish
-
er nearby and have a watchperson ready to use it.
3.3 Do not weld on drums or any closed containers.
4 Arc rays can burn eyes and injure skin.
4.1 Wear hat and safety glasses. Use ear protection and
button shirt collar. Use welding helmet with correct
shade of filter. Wear complete body protection.
5 Become trained and read the instructions before
working on the machine or welding.
6 Do not remove or paint over (cover) label.
2 GENERAL DESCRIPTIONS
The MULTIMIG 511 welding machine is a system suitable
for synergic MIG/MAG and pulsed synergic MIG/MAG
welding, developed with inverter technology.
It is equipped with a 2-roller gearmotor.
This welding machine must not be used to defrost pipes.
2.1 EXPLANATION OF TECHNICAL SPECIFICATIONS
No. Serial number. Must be indicated on any re-
quest regarding the welding machine.
Single-phase static transformer-rectifier
frequency converter.
MIG Suitable for MIG/MAG welding.
U0. Secondary open-circuit voltage.
X. Duty cycle percentage.
The duty cycle expresses the percentage of
10 minutes during which the welding ma-
chine may run at a certain current without
overheating.
I2. Welding current
U2. Secondary voltage with I2 current
U1. Rated supply voltage.
1~ 50/60Hz Single-phase 50 or 50 Hz power supply.
I1 Max
Max. absorbed current at the corresponding
I2 current and U2 voltage.
I1 eff This is the maximum value of the actual cur-
rent absorbed, considering the duty cycle.
This value usually corresponds to the capac-
ity of the fuse (delayed type) to be used as a
protection for the equipment.
IP21S Protection rating for the housing.
S
Suitable for use in high-risk environments.
NOTE:
The equipment has also been designed for use in environ-
ments with a pollution rating of 3. (See IEC 60664).
2.2 PROTECTION DEVICES
2.2.1 Bloch protection
In case of welding machine malfunction, the display screen
A will show the message WARNING to identify the type of
fault. If this message does not disappear when the machine
is switched off and back on, contact the after-sales service.
2.2.2 Thermal cutout
This appliance is protected by a thermostat which prevents
machine operation whenever acceptable temperatures
are exceeded. In these conditions, the fan continues to
operate and the display screen
A shows the message
WARNING tH in flashing mode.
2.3.3 Positioning on sloping planes.
Since this welding machine is equipped with wheels
without brake, do not position it on sloping planes, to
prevent machine tilting or uncontrolled movement.
3 CONTROLS LOCATED ON FRONT PANEL.
A
B
H
C
D
A – DISPLAY SCREEN.
This displays both the welding parameters and all the
welding functions.