LOKERMANN GRAND ARC 161 User manual

USER MANUAL
INVERTER Based Welding Machines
IMPORTANT: Read this OPERATOR MANUAL together
with PRESCRIPTION AND COMPLIANCE MANUAL before
to use this equipment. In case of loss one of two parts
contact immediately your dealer.
Allow the operator to consult this manual.
GRAND ARC 161
GRAND ARC 160 PFC
GRAND ARC 200PFC
GRAND ARC 160 CEL

CONTENT
1INSTALLATION WARNING
2OVERVIEW
2.1 Features
2.2 Technical Data
2.3 Brief Introduction
2.4 Volt-Ampere Characteristic
3INSTALLATION & OPERATION
3.1 Layout for the front and rear panel
3.2 Installation & Operation for MMA Welding
3.2.1 Set up installation for MMA Welding
3.2.2 Operation for MMA Welding
3.2.3 MMA Welding
3.2.4 MMA Welding Fundamentals
3.2.5 MMA Welding trouble shooting
3.3 Installation & Operation for TIG Welding
3.3.1 Set up installation for TIG Welding
3.3.2 Operation for TIG Welding
3.3.3 TIG Welding Fundamentals
3.3.4 DC TIG Welding trouble shooting
3.4 Operation environment
4MAINTENANCE & TROUBLESHOOTING
4.1 Maintenance
4.2 Troubleshooting
4.3 List of error code
4.4 Electrical schematic drawing

1
Installation
warning INSTALLATION WARNING
This machine is certified according to 60974-10:2014 Arc Welding Equipment Part 10:
Electromagnetic compatibility (EMC) requirement and the EUT belongs to Group 2
Class A.
WARNING: This Class A equipment is intended for industrial use and it is not intended
for use in residential locations where the elctrical power is provided by the public
low-voltage supply system. There may be potential difficulties in ensuring
electromagnetic compatibility in those locations, due to conducted as well as
radiated disturbances.
WARNING: This equipment does not comply with IEC 61000-3-12. If it is connected to
a public low-voltage system, it is the responsability of the installer or user of the
equipment to ensure, by consultation with the distribution network operator if
necessary, that the equipment may be connected.
Assessment of area
Before installing arc welding equipment the user shall make an assessment of
potentialelectromagnetic problems in the surrounding area. The following shall be
taken into account:
a) other supply cables, control cables, signalling and telephone cables, above,
below and adjacent to the arc welding equipment;
b) radio and television transmitters and receivers;
c) computer and other control equipment;
d) safety critical equipment, for example guarding of industrial equipment;
e) the health of the people around, for example the use of pacemakers and
hearing aids;
f) equipment used for calibration or measurement;
g) the immunity of other equipment in the environment. The user shall ensure that
other equipment being used in the environment is compatible. This may require
additional protection measures;
h) the time of day that welding or other activities are to be carried out.
The size of the surrounding area to be considered will depend on the structure of
the building and other activities that are taking place. The surrounding area may
extend beyond the boundaries of the premises.
Methods of reducing emissions-Public supply system
Arc welding equipment should be connected to the public supply system according
to this manual recommendations. If interference occurs, it may be necessary to take
additional precautions such as filtering of the public supply system. Consideration
should be given to shielding the supply cable of permanently installed arc welding
equipment, in metallic conduit or equivalent. Shielding should be electrically
continuous throughout its length. The shielding should be connected to the welding
power source so that good electrical contact is maintained between the conduit
and the welding power source enclosure.

Maintenance of the arc welding equipment
The arc welding equipment should be routinely maintained according to this manual
recommendations. All access and service doors and covers should be closed and
properly fastened when the arc welding equipment is in operation. The arc welding
equipment shouldnot be modified in any way, except for those changes and
adjustments covered in this manaul. In particular, the spark gaps of arc striking and
stabilising devices should be adjusted and maintained according to our r
ecommendations.
Welding cables
The welding cables should be kept as short as possible and should be positioned
close together, running at or close to the floor level.
Equipotential bonding
Bonding of all metallic objects in the surrounding area should be considered.
However, metallic objects bonded to the work piece will increase the risk that the
operator could receive an electric shock by touching these metallic objects and
the electrode at the same time. The operator should be insulated from all such
bonded metallic objects.
Earthing of the workpiece
Where the workpiece is not bonded to earth for electrical safety, nor connected to
earth because of its size and position, for example, ship’s hull or building steelwork,
a connection bonding the workpiece to earth may reduce emissions in some, but
not all instances. Care should be taken to prevent the earthing of the workpiece
increasing the risk of injury to users or damage to other electrical equipment.
Where necessary, the connection of the workpiece to earth should be made by
a direct connection to the workpiece, but in some countries where direct
connection is not permitted, the bonding should be achieved by suitable
capacitance, selected according to national regulations.
Screening and shielding
Selective screening and shielding of other cables and equipment in the surrounding
area may alleviate problems of interference. Screening of the entire welding area
may be considered for special applications.

2.1
Features
PFC Tecnology: Power Factor more than 99%. Multiple advantages such as
wider input voltage.
(only
for GRAND ARC 160 PFC and GRAND ARC 200PFC)
Tig Mode: capable of welding with Lift TIG mode.
Extra functions:
"Hot Start"(built in): help the welder in the arc
igniction;
"Anti -sticking": stop the output current when the electrode is
glued to the working piece.
"Arc Force" (built in): increase the output current when
the arc is to
short helping the welder.
Cellulosic electrode (only GRAND ARC 160
CEL)
 Protections:
equipped with temperature, voltage
and current sensors
for high protection.

Digital display:
digital current display meter for
accurate presetting and feedback
of welding parameters and out put.

Extremely low weight and versatility.
 Generator friendly:
Designed to work with diesel
generators and to avoid
failures due to its voltage spikes.
MMA Mode: capable of welding in SMAW (Shield Metal Arc Welding).
energy saving and

Models
Parameters
GRAND ARC 160 CEL GRAND ARC 161
Power Supply Voltage (V) 1~220/230/240±10% 1~220/230/240±10%
Frequency(HZ) 50/60 50/60
Rated input current (I
1
max)
（
A
）
34 MMA/ 25 TIG 37 MMA/27 TIG
Rated input power（KW）5.0 MMA/ 3.7 TIG 5.5 MMA 4.0 TIG
Duty cycle ( 40℃10 min )
40% 160A 40% 160A
60% 135A 60% 135A
100% 105A 100% 105A
Welding Current Range
（
A
）
10-160 10-200
No Load Voltage(V) 90 V 62 V
Efficiency (%) ≥80% ≥80%
Power Factor 0.65 0.65
Insulation class H H
Protection class IP23 IP23
Cooling AF AF
Net Weight (Kg) 6.5 6.0
Dimensions (mm) 380x185x305 380x185x305
Electrode Diameter φ
1.6~ φ 4.0 φ 1.6~ φ 4.0
Electrode Type 6010,6011,6013,7018 etc. 6013, 7018 etc.
Models
Parameters
GRAND ARC 160 PFC GRAND ARC 200 PFC
Power Supply Voltage(V) 1~220/230/240±10% 1~220/230/240±10%
Frequency(HZ) 50/60 50/60
Rated input current (I1max)
(A
）
21 MMA/14 TIG 28 MMA/ 20 TIG
Rated input power（KW）4,8 MMA/ 3,2 TIG 6.4 MMA/ 4.6 TIG
Duty cycle (40℃10 min)
40% 160A 40% 200A
60% 135A 60% 165A
100% 105A 100% 130A
Welding Current Range
（
A
）
10-160 10-200
No Load Voltage (V) 14.5 (limited) 14.5 (limited)
Efficiency (%) ≥85% ≥85%
Power Factor 0.99 0.99
Insulation class H H
Protection class IP23 IP23
Cooling AF AF
Net Weight (Kg) 7 7
Dimensions( mm) 380x185x305 380x185x305
Electrode Diameter φ
1.6~ φ 4.0 φ 1.6~ φ 5.0
Electrode Type 6013,7018 etc. 6013,7018 etc.
2.2
Technical
Data

3
Brief
Introduction
Grand Arc series of welding machines adopt the latest Pulse Width Modulation
(PWM) technology and the Insulated Gate Bipolar Transistor (IGBT) power modules.
It uses switching frequencies in the 20KHz-50KHz ranges so as to replace the
traditional line-frequency transformer type welding machines. So, machines are
characterized with portability, small size, lightweight, low energy consumption and
noise, etc.
Grand Arc series of welding machines has excellent performance: constant current
output makes welding arc more stable; fast dynamic response speed reduces the
impact from the arc length fluctuation to the current; accurate stepless current
adjustment and pre-setting function. There are also some automatic protection
functions for under voltage, over current, over heat, etc. inside the welder, when
the problems listed before occurred, the alarm light on the front panel is on and at
the same time the output current will be cut off. It can self-protect, prolong the
usefull life, greatly improved the reliability and practicality of the welding machine.
Grand Arc series of welding machines can also realize TIG operation.
Grand Arc series of welding machines is widely used in Petroleum, chemical,
mechanical, shipbuilding, architecture, boiler, pressure container, military industry
and Maintenance work, etc. These machines have high duty cycle even in the
40°, which can keep the continuous operation.

Grand Arc series of welding machines has excellent volt-ampere characteristic.
Referring to the following graph.
In MMA welding, the relation between the rated loading voltage U2
and welding current I2 is as follows:
When I2≤600A，U2＝20＋0.04 I2（V）； When I2＞600A，U2＝44（V）.
2.4
Volt-Ampere
Characteristic
Installation & Operation
3.1
Layout for
the front and
rear panel

Front Panel
(1) Output terminal “-”
(2) Output terminal “+”
(3) Current digital display
(4) Power light: Power indicator, power on light on
(5) Alarm light: Alarm indicator, lights that occurred over voltage, over current,
or overheating inside the machine, is protected
(6) Welding current adjustment knob: Turn this knob to adjust the output
current size
(7) Conversion switch: choose LIFT TIG; choose MMA
Back panel
- Power switch: control power through and break.
- Power Access client: access to cable.
- Fan: help plant cooling.
GRAND ARC 160 CEL
GRAND ARC 161
GRAND ARC 160 PFC
GRAND ARC 200 PFC

Connection of output cables two sockets are available on this welding machine.
For MMA welding the electrode holder is shown be connected to the positive socket,
while the earth lead (work piece) is connected to the negative socket,
this is known as DCEP. However various electrodes require a different polarity for
optimum results and careful attention should be paid to the polarity, refer to the
electrode manufacturers information for the correct polarity.
DCEP (reverse polarity): Electrode connected to “+”output socket.
DCEN (strait polarity): Electrode connected to“-” output socket.
3.2
Installation
&
Operation
for MMA
Welding
3.2.1
Set up
installation
for MMA
Welding
(1) Connect the earth lead to “-”, tighten clockwise;
(2) Connect the electrode lead to “+”, tighten clockwise;
(3) Each machine is equipped with a power supply cable based on the input
voltage of power source. Don’t pick the wrong voltage;
(4) With the corresponding input power supply terminal or socket good contact
and prevent oxidation;
(5) With a multi meter measure the input voltage is within the fluctuation range;
(6) Make sure that power ground is well grounded.