Cebora TRI STAR MIG 1635/M Service manual

CEBORA S.p.A.
1
TRI STAR MIG 1635/M
POWER SOURCE art. 283
SERVICE MANUAL
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CONTENTS
1
- GENERAL INFORMATIONS ....................................................................................................................... 3
- Introduction. ................................................................................................................................................. 3
- General service policy. ................................................................................................................................. 3
- Safety informations....................................................................................................................................... 3
- Electromagnetic compatibility...................................................................................................................... 3
2
- SYSTEM DESCRIPTION .............................................................................................................................. 4
2.1
- Introduction. ................................................................................................................................................. 4
2.2
- Technical specifications................................................................................................................................ 4
2.3
- Description of power source art. 283............................................................................................................ 4
3
- MAINTENANCE............................................................................................................................................ 6
3.1
- Periodic inspection, cleaning. ....................................................................................................................... 6
3.2
- Operating sequence....................................................................................................................................... 6
3.2.1 - Power source commands and signaling. .................................................................................................... 6
3.2.2 - Power source operation.............................................................................................................................. 7
3.2.3 - MIG operation. .......................................................................................................................................... 8
3.3
- Troubleshooting............................................................................................................................................ 9
3.3.1 - The power source does not start, control panel off. ................................................................................... 9
3.3.2 - Power source powered, control panel on, fans (27) stopped.................................................................... 10
3.3.3 - Power source powered, display and signals does not indicate the correct values. ................................... 10
3.3.4 - The start button produces no effect.......................................................................................................... 11
3.3.5 - No gas flows from the torch..................................................................................................................... 11
3.3.6 - In MIG, the wire feeder motor (31) does not work.................................................................................. 12
3.3.7 - In open circuit operation, the output voltage is not regular. .................................................................... 13
3.3.8 - In resistive load operation, the output voltage is not regular. .................................................................. 14
3.3.9 - In MIG, arc difficult to strike, the arc goes out immediately after lighting. ............................................ 15
3.3.10 - When start button is released, the wire sticks to the workpiece (ineffective motor braking)................... 15
3.4
- Error codes and alarm signals..................................................................................................................... 16
3.4.1 - 02 - EEPROM error. ................................................................................................................................ 16
3.4.2 - 10 - Malfunction in the circuit to detect short-circuits at the output........................................................ 16
3.4.3 - 42 - Wire feeder motor (31) fault............................................................................................................. 16
3.4.4 - 52 - “trG” on display (M). Start button pressed during start-up............................................................... 16
3.4.5 - 53 - “trG” on display (M). Start button pressed while resetting from stop due to temperature beyond
allowable limits. ......................................................................................................................................... 16
3.4.6 - 54 - Short-circuit between torch and workpiece upon start-up. ............................................................... 17
3.4.7 - 56 - Short-circuit at the output lasts too long (max. allowable time = 1 sec.).......................................... 17
3.4.8 - 57 - Wire feeder motor (31) current too high........................................................................................... 17
3.4.9 - 61 - Mains voltage lower than minimum limit......................................................................................... 18
3.4.10 - 62 - Mains voltage higher than maximum limit....................................................................................... 18
3.4.11 - 73 - “tH” on display (M), “0” on display (N) = output diode temperature excessive. ............................. 18
3.4.12 - 99 - “OFF” on display (M). Incorrect mains voltage (machine shut off)................................................. 18
4
- COMPONENTS LIST................................................................................................................................... 19
4.1
- Power source art. 283 : see file ESP283.pdf enclosed at the end of the manual......................................... 19
4.2
- Components table: see file ESP283.pdf enclosed at the end of the manual................................................ 19
4.3
- Spare parts list. ........................................................................................................................................... 19
5
- ELECTRICAL DIAGRAMS ........................................................................................................................ 20
5.1
- Power source art. 283 : see file SCHE283.pdf enclosed at the end of the manual...................................... 20
5.2
- Waveforms. ................................................................................................................................................ 20
5.2.1 - Wire feeder motor (31) voltage during correct braking (par. 3.3.10)....................................................... 20
5.2.2 - Wire feeder motor (31) voltage during incorrect braking (par. 3.3.10). .................................................. 20
5.3
- Power board (32), code 5.602.280/B. ......................................................................................................... 21
5.4
- Control board (29), code 5.602.269/A. ....................................................................................................... 22
1.1
1.2
1.3
1.4
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1 - GENERAL INFORMATIONS
1.1 - Introduction.
The purpose of this manual is to train personnel assigned to carry out maintenance on the
power source art. 283 for MIG/MAG, TIG-DC and MMA welding systems.
1.2 - General service policy.
It is the responsibility of the customer and/or operator to use the equipment appropriately, in
accordance with the instructions in the Instruction Manual, as well as to maintain the equipment
and related accessories in good working condition, in compliance with the instructions provided
in the Service Manual.
Any internal inspection or repairs must be carried out by qualified personnel who are
responsible for any intervention on the equipment.
It is forbidden to attempt to repair damaged electronic boards or modules; replace them with
original Cebora spare parts.
1.3 - Safety informations.
The safety notes provided in this manual are an integral part of those given in the Instruction
Manual. Therefore, before working on the machine, please read the paragraph on safety
instructions in the aforementioned manual.
Always disconnect the power cord from the mains, and wait for the internal capacitors to
discharge (2 minutes), before accessing the interior of the equipment.
Some internal parts, such as terminals and dissipaters, may be connected to mains or
otherwise hazardous potentials. It is therefore forbidden to work with the safety guards removed
from the machine unless strictly necessary. In this case, take special precautions such as wearing
insulating gloves and footwear, and working in a perfectly dry environment with dry clothing.
1.4 - Electromagnetic compatibility.
Please read and observe the instructions provided in the paragraph “Electromagnetic
compatibility” of the Instruction Manual.
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2 - SYSTEM DESCRIPTION
2.1 - Introduction.
The TRI STAR MIG 1635/M is a multiprocess system for MIG/MAG, TIG-DC and MMA
welding.
It is made up of an electronic power source (art. 283) and a set of accessories to adapt to
various types of applications (see list in the Sales Catalogue).
The power source is controlled by microprocessor circuits, which manage the operative
functions of the welding system and operator interface.
2.2 - Technical specifications.
To verify the technical specifications, see the machine plate, Instruction Manual, and Sales
Catalogue.
2.3 - Description of power source art. 283.
Art. 283 is a direct current power source with controlled current, consisting of a single-phase
bridge rectifier and a DC/DC converter.
Referring to the electrical diagram in par. 5.1, drawing 4.1 and table 4.2, we can identify the
main blocks that make up the power source.
The main switch (9) powers the power board (32), that is the actual welding current power
source, and converts the alternating mains voltage into direct voltage adjusted according to
welding needs.
It contains all power circuit components:
− the power bridge rectifier, equipped with a DC-capacitors pre-charge circuit, which generates
the 320 Vdc voltage to power the igbt inverter section;
− the DC-capacitors to level this dc voltage;
− the igbt inverter, which generates the square-wave alternating voltage for power transformer;
− the power transformer, and the TA to detect the current at the primary circuit of the power
transformer;
− the diode group, made up of two diodes connected to a shared cathode, that rectifies the
alternating voltage, generated by the power transformer secondary winding, to make it
available at the power source output terminals;
− the service transformer for control circuits power supply.
The power transformer, powered by the igbt inverter, provides the secondary circuit with
voltage and current values suitable for welding. A different winding gives the voltage supply for
the wire feeder motor (31) control circuit on control board (29).
The TA mounted on the power board (32) provides the control board (29) with the signal of
the transformer primary current, for the welding current regulation.
The control board (29) contains the main power source microprocessor, and supervises
management of the complete power source.
In the control board (29) is generated the PWM signal to send to the inverter igbt, and the
wire feeder motor voltage supply, with regulation based on the selected welding program
requirements.
The control board (29), also acts as power source control panel, and contains the following
commands and indicators to perform the supervision and management of the complete power
source (see Instruction Manual for more informations):
− two potentiometers to adjust the output voltage, welding current, and the values assignable to
the parameters indicated by displays;
− a set of leds to indicate the parameters shown on displays;
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− two 3-digit displays to show output voltage, welding current, wire speed, values assignable to
the selected parameters, material type, services functions and error codes.
The welding current regulation is performed by the microprocessor on the control board (29),
based on signals received from the power board (32), and parameters set via control panel.
The microprocessor also controls the supply voltage conditions, to activate any safety devices
necessary to protect the power source (see Error codes par. 3.4).
On the front panel are gathered the terminals for the welding torch, which must be connected
according the modalities imposed by the selected welding process (sees Instructions Manual).
In particular, are present two GIFAS (G) and (H) terminals for the welding current, a
centralized socket (E) with pneumatic socket for the gas, and a two poles connector (F) for the
start command from the torch push-button.
The choke (28) and the power board (32) diode group outputs, are connected to the power
source output terminals, from which is picked up the power source output voltage signal. This
signal is used by the control board (29) to detect short-circuits of the wire on the workpiece
during welding, and consequently to adjust the welding current, as well as stop the power source
if the short-circuit lasts too long.
Fans (27), for the power source power elements cooling, are connected to the power board
(32) and powered from the same source (+24 Vdc) that feeds the control board (29).
The signals processed by the electronic boards and present at their connectors are listed in the
table in chapter five of this manual.
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3 - MAINTENANCE
WARNINGS
ANY INTERNAL INSPECTIONS OR REPAIRS MUST BE CARRIED OUT BY QUALIFIED
PERSONNEL.
BEFORE BEGINNING MAINTENANCE OPERATIONS, UNPLUG THE MACHINE FROM
THE MAINS AND WAIT FOR THE INTERNAL CAPACITORS TO DISCHARGE (2
MINUTES).
3.1 - Periodic inspection, cleaning.
Periodically open the power source aeration tunnel and remove any dirt or dust to ensure
smooth air flow, and thus adequate cooling of the internal parts of the power source.
Remove any dirt or metal dust from the wire feed liner and gearmotor unit, also making sure
that they are not worn to the point of needing replacement.
Check the condition of the output terminals, output and power supply cables of the power
source; replace if damaged.
Check the condition of the internal power connections and connectors on the electronic
boards; if you find “loose” connections, tighten or replace the connectors.
3.2 - Operating sequence.
The following sequence represents correct functioning of the machine. It may be used as a
guiding procedure for troubleshooting.
It must be carried out after each repair without any errors.
3.2.1
- Power source commands and signaling.
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NOTE
‰ Operations preceded by this symbol refer to operator actions.
♦ Operations preceded by this symbol refer to machine responses that must occur following an
operator action.
3.2.2
‰
‰
‰
- Power source operation.
System shut off and disconnected from the mains.
Connect the power source to the mains.
Close the switch (U).
♦ System supplied, lamp on the switch (9) lit, on front panel the display (M) central
led flashes.
♦ After three seconds, leds and displays lit (lamp test). Fans (27) working.
♦ After one second, display (M) indicates the Cebora article number (i.e.: “283”).
♦ After one second, display (M) indicates the version of the programs related to the
synergic curves (i.e.: “H01”, H = synergic programs table, 01 = programs
version); display (N) indicates the version of the “firmware Cebora”.
♦ After one second, displays (M) and (N) indicate the process setup as it was set
before the last time the unit was shut off.
♦ After two seconds, display (M) indicates the programmed welding current and
display (N) the programmed or actual output voltage (in MIG, indications are
related to the synergic program selected).
Correct?
‰
YES
Press the button (V) several times; the selection shown on the displays is repeated in
sequence.
♦ In MIG, each time the button (V) is pressed, the leds D, C, B and A lit one after
the other; display (M) respectively indicates program number, material thickness,
wire speed, welding current; display (N) indicates material type, or output voltage
related to the selected synergic program.
♦ In TIG and MMA, only the two led D and A lit one after the other; display (M)
temporarily indicates the selected welding process and then the set current;
display (N) indicates the output voltage value.
Correct?
‰
‰
‰
‰
NO (see 3.3.1, 3.3.2, 3.3.3).
NO (see 3.3.3).
YES
Press the button (V) for a time longer than 3 seconds, to enter the “Service Function” menu
(“Service Function” menu is related to the welding process selected).
Turn the knob (I) to select the desired function, indicated on display (M).
Turn the knob (L) to change the value of the function indicated on display (M).
Press the button (V) for a time shorter than 3 seconds, to exit the “Service Function” menu
and store the current setup.
♦ Display (M) indicates the available functions related to the set welding process
(see Instruction Manual).
♦ Display (N) indicates the available choice and values related to the function
indicated on display (M) (see Instruction Manual).
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Correct?
NO (see 3.3.3).
YES
3.2.3
- MIG operation.
NOTE
On continuation it is illustrated the sequence of MIG process only, which involves all the
circuits of the power source, and therefore is considerate sufficient for the purpose of this
manual.
WARNING
DURING THE FOLLOWING TESTS DO NOT AIM THE TORCH AT PEOPLE OR PARTS
OF THE BODY, BUT ONLY TOWARDS AN OPEN SPACE OR THE WORKPIECE.
‰
‰
‰
‰
‰
‰
‰
‰
Switch-off the power source.
Connect the gas intake to the fitting (T) on the rear panel.
Connect the MIG torch to the central adapter (E), to the (H) positive terminal and the torch
signals cable to the connector (F) of the power source.
Connect the ground cable to the (G) negative terminal of the power source.
Switch-on the power source, closing the switch (U).
After the start-up phase, use the button (V) to select the program choice mode (led (D)
“PROG” lit).
Use the knob (I) to select a MIG program (i.e.: 1 on display (M)).
Press and hold down the torch start button for 5 seconds approximately.
♦ Gas begins to flow from the torch, for as long as the button is held down and the
pre-gas time selected (the post-gas time is activated only if the power source has
delivered current).
♦ Wire begins to feed from the torch, or at least the wire feeder motors starts
running, for as long as the button is held down.
♦ Open-circuit output voltage is generated for as long as the button is held down.
Correct?
‰
YES
Move the torch near the workpiece and press the torch button.
♦ Begin welding. Turn the knobs (I) or (L) to attain the current and wire speed
conditions suited to the welding to be carried out.
♦ During welding display (M) and (N) indicate the welding current and voltage.
Correct?
‰
NO (see 3.3.4, 3.3.5)
3.3.6, 3.3.7).
NO (see 3.3.8, 3.3.9).
YES
Release the torch start button.
♦ Arc shuts off immediately, wire stops feeding from the torch, (if a long ramp time
and burn-back time are not set), while the gas flow ends after the post-gas period
(the post-gas time is activated only if the power source has delivered current).
Correct?
NO (see 3.3.6, 3.3.10).
YES
REGULAR OPERATION.
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3.3 - Troubleshooting.
WARNINGS
ANY INTERNAL INSPECTIONS OR REPAIRS MUST BE CARRIED OUT BY QUALIFIED
PERSONNEL.
BEFORE REMOVING THE PROTECTIVE GUARDS AND ACCESSING INTERNAL
PARTS, DISCONNECT THE POWER SOURCE FROM THE MAINS AND WAIT FOR THE
INTERNAL CAPACITORS TO DISCHARGE (2 MINUTES).
NOTE
Items in boldface describe problems that may occur on the machine (symptoms).
‰ Operations preceded by this symbol refer to situations the operator must determine (causes).
♦ Operations preceded by this symbol refer to actions the operator must perform in order to
solve the problems (solutions).
3.3.1
- The power source does not start, control panel off.
MAINS SUITABILITY TEST.
‰ No voltage for mains protection.
NO
Correct?
YES
♦ Eliminate any short-circuits on the connections between power cable, switch (9)
and power board (32).
♦ Make sure that terminals TP2 and TP3 on power board (32) are not shortcircuited.
♦ Mains not suitable to power the power source (ex.: insufficient installed power).
MAINS CONNECTION TEST.
‰ Terminals TP2 and TP3 on power board (32) = 230 Vac, with switch (9) closed.
YES
Correct?
NO
♦ Check power cable and plug and replace if necessary.
♦ Check switch (9) and replace if defective.
♦ Check the mains voltage conditions.
CONTROL BOARD (29) POWER SUPPLY TEST.
Control board (29), connector J7, terminals 3(+) - 4(-) = +13 Vdc for the first 5 seconds
approximately (start-up phase); successively +25 Vdc.
‰
YES
Correct?
NO
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♦ Check the wiring between J3 and J7 on control board (29) and J4 power board
(32).
♦ With the power source off, temporarily disconnect the connector J7 on control
board (29) and check the resistance between terminals 3 - 4 of J7 on control board
(29). Corrected value = >Mohm in both measure sense. If short-circuited, replace
control (29) and power (32) boards.
♦ Replace power (32) and control (29) boards.
♦ Replace the control board (29).
3.3.2
- Power source powered, control panel on, fans (27) stopped.
FANS (27) TEST.
‰ Power board (32), connectors J2 and J3, terminals 1(+) - 2(-) = +13 Vdc for the first 5 seconds
approximately (start-up phase); successively +25 Vdc.
NO
Correct?
YES
♦ Check the wiring between fans (27) and connectors J2 and J3 on power board
(32).
♦ Make sure that there are no mechanical impediments blocking the fans.
♦ Replace the fans (27).
♦ Replace the control board (29).
3.3.3
- Power source powered, display and signals does not indicate the correct values.
ERROR CODE TEST.
‰ Upon start-up, after the lamp-test, display (M) shows “Err” and display (N) a number, to
indicate an error code.
NO
Correct?
YES
♦ See Error codes and alarm signals, par. 3.4.
INDICATORS TEST.
‰ Upon start-up, after the lamp-test, display (M) indicates the Cebora article number (i.e.:
“283”).
‰ After one second, display (M) indicates the version of the programs related to synergic curves
(i.e.: “H01”, H = synergic programs table (short), 01 = programs version); display (N)
indicates the version of the “firmware 283 Cebora”.
‰ After one second, displays (M and (N) indicate the process setup as they were set before the
last time the unit was shut off.
‰ After two seconds, display (M) indicates the programmed welding current and display (N) the
programmed or actual output voltage.
‰ With the button (V) and knobs (I) and (L) the set-up functions parameters and “Service
Functions” adjustments are possible (see Instructions Manual).
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YES
Correct?
NO
♦ Check the wiring between J1 control board (29) and J1 power board (32).
♦ Check the wiring between J3 and J7 control board (29) and J4 power board (32).
♦ Carry out the CONTROL BOARD (29) POWER SUPPLY TEST, par. 3.3.1.
♦ Replace the control (29) and/or power board (32).
♦ Regular operation of the control panel.
3.3.4
- The start button produces no effect.
START COMMAND TEST.
‰ Control board (29), connector J6, terminals 2(+) – 1(-) = 0 Vdc with torch button pressed (+8
Vdc approximately with button released).
YES
Correct?
NO
♦ Check the wiring between connector J6 control board (29), connector (F) on front
panel and the torch button.
♦ Check torch button. If defective, replace.
♦ See CONTROL BOARD (29) POWER SUPPLY TEST, par. 3.3.1.
♦ Replace the control board (29).
♦ Replace the control board (29).
3.3.5
- No gas flows from the torch.
SOLENOID VALVE (7) TEST.
‰ Solenoid valve (7) terminals = 230 Vac, in MIG or TIG, with torch button pressed (the
solenoid valve opening duration also depends on the pre-gas and post-gas parameters set).
NO
♦
♦
♦
♦
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Correct?
YES
Check for gas presence at the power supply fitting (T) on the rear panel, and make
sure that the pressure and flow in the intake line comply with the specified values
(see specifications in the Instruction Manual).
Make sure there are no occlusions in the gas hoses of the power source.
With the power source off, check the resistance on solenoid valve (7) terminals =
2500 ohm. If >Mohm (winding broken), replace the solenoid valve (7).
Replace the solenoid valve (7).
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♦ Check the wiring between terminals J8 and J9 of power board (32) and solenoid valve (7).
♦ With the power source off, check the resistance on solenoid valve (7) terminals = 2500 ohm.
If 0 ohm (short-circuit), replace solenoid valve (7) and power board (32).
♦ Check the wiring between J1 control board (29) and J1 of power board (32).
♦ With power source off, temporarily disconnect connector J1 on control board (29), and make
sure the resistance between terminal 5 of the connector disconnected from J1 and terminal 3
of J7 on control board (29) (solenoid valve rele coil). Corrected value = approximately 1
Kohm in both measure senses. If not corrected check the wiring between J7 control board (29)
and J4 power board (32) and, if necessary, replace the RL3 rele on power board (32).
♦ See CONTROL BOARD (29) POWER SUPPLY TEST, par. 3.3.1.
♦ Replace the control board (29).
3.3.6 - In MIG, the wire feeder motor (31) does not work.
WIRE FEEDER MOTOR (31) TEST.
‰ Control board (29), connector J8, terminals 2(+) and 1(-) = approximately +2 / +18 Vdc,
based on the program set, with start button pressed and adjustable by knob (I).
NO
Correct?
YES
♦ Check the wiring between J8 control board (29) and wire feeder motor (31).
♦ With power source off, temporarily disconnect the terminals of the wire feeder
motor (31) from connector J8 control board (29), and make sure that the resistance
between the terminals of the motor left free = approximately 3,5 ohm (motor
winding resistance). If >Mohm (winding broken), replace wire feeder motor (31).
♦ Make sure there are no mechanical impediments blocking the motor.
♦ Check the motor rotation sense; if wrong, reverse the wires on the terminals of J8
on control board (29).
♦ Replace the wire feeder motor (31).
♦ With power source off, temporarily disconnect the terminals of the wire feeder motor (31)
from connector J8 control board (29), and make sure that the resistance between the terminals
of the motor left free = approximately 3,5 ohm (motor winding resistance). If 0 ohm (shortcircuit), replace the wire feeder motor (31) and control board (29).
♦ See CONTROL BOARD (29) POWER SUPPLY TEST, par. 3.3.1 and START COMMAND
TEST, par. 3.3.4.
♦ Replace the control board (29).
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3.3.7
13
- In open circuit operation, the output voltage is not regular.
OPEN-CIRCUIT OUTPUT VOLTAGE TEST.
‰ Output terminal –(G) power source (-) and output terminal +(H) power source (+) = voltages
per table:
Process
Voltage
Condition
MIG
+109 Vdc
Start button pressed
TIG
+95 Vdc
Power source powered or start button pressed
MMA
+109 Vdc
Power source powered
NO
Correct?
YES
♦ Correct operation.
DC-CAPACITORS PRECHARGE TEST.
‰ Power board (32), connector J6, terminals 1(+) and 4(-), voltage = +320 Vdc approximately,
constant also during output voltage generation time, as an example during table conditions.
YES
♦
♦
♦
♦
Correct?
NO
♦ Make sure power board (32) power supply, performing, if necessary, tests of par.
3.3.1.
♦ Check wiring between J1 control board (29) and J1 power board (32).
♦ With power source off, temporarily disconnect connector J1 from control board
(29) and make sure the resistance between terminal 3 of the connector
disconnected from J1 and terminals 3 of J7 on control board (29) (precharge rele
coil). Corrected value = approximately 1 Kohm in both measure senses. If not
correct check the wiring between J7 control board (29) and J4 power board (32)
and, if necessary, replace the RL1 rele and check the PTC1conditions on power
board (32).
♦ Replace power (32) and/or control (29) boards.
Check connection between diode group heat sink on power board (32), inductor (28) and
power source +(H) output terminal, and between TP9 on power board (32) and power source
–(G) output terminal. If you find loose connections, tighten and replace any damaged
components.
Check wiring between J7 and J3 of control board (29) and J4 of power board (32), between J1
of control board (29) and J1 power board (32), power source +(H) output terminal and J7 of
power board (32). If you find loose connections, tighten and replace any damaged
components.
Make sure control board (29) power supply performing, if necessary, the CONTROL
BOARD (29) POWER SUPPLY TEST, par. 3.3.1.
Replace power (32) and/or control (29) boards.
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3.3.8
14
- In resistive load operation, the output voltage is not regular.
OPEN-CIRCUIT OUTPUT VOLTAGE TEST.
‰ Output terminal –(G) power source (-) and output terminal +(H) power source (+) = voltages
per table:
Process
Voltage
Condition
MIG
+109 Vdc
Start button pressed
TIG
+95 Vdc
Power source powered or start button pressed
MMA
+109 Vdc
Power source powered
YES
Correct?
NO
♦ Perform the test of par. 3.3.7.
NOTE
For the following tests use a resistive load capable of withstanding the maximum power
source current. The appropriate values are shown in the table.
Process
Resistor
Maximum output Power source
Condition
resistive load
current
output voltage
MIG
0,14 ohm
160 Adc
+ 22 Vdc
Start button pressed
TIG
0,10 ohm
160 Adc
+ 16,4 Vdc
Start button pressed
MMA
0,19 ohm
130 Adc
+ 25,2 Vdc
Power source powered
OUTPUT VOLTAGE TEST ON RESISTIVE LOAD.
‰ Output terminal –(G) power source (-) and output terminal +(H) power source (+) = voltages
per table:
NO
Correct?
YES
♦ Correct operation.
POWER BOARD (32) POWER SUPPLY TEST.
‰ Power board (32), connector J6, terminals 1(+) and 4(-), voltage = +300 Vdc approximately,
constant also during output voltage generation time, as an example during table conditions.
YES
Correct?
NO
♦ Make sure power board (32) power supply, performing, if necessary, tests of par.
3.3.1.
♦ Check wiring between J1 control board (29) and J1 power board (32),
♦ With power source off, temporarily disconnect connector J1 from control board
(29) and make sure the resistance between terminal 3 of the connector
disconnected from J1 and terminals 3 of J7 on control board (29) (precharge rele
coil). Corrected value = approximately 1 Kohm in both measure senses. If not
correct check the wiring between J7 control board (29) and J4 power board (32)
and if necessary replace the RL1 rele and check the PTC1conditions on power
board (32).
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♦
♦
♦
♦
15
♦ Replace power (32) and/or control (29) boards.
Check connection between diode group heat sink on power board (32), inductor (28) and
power source +(H) output terminal, and between TP9 on power board (32) and power source
–(G) output terminal. If you find loose connections, tighten and replace any damaged
components.
Check wiring between J7 and J3 of control board (29) and J4 of power board (32), between J1
of control board (29) and J1 power board (32), power source +(H) output terminal and J7 of
power board (32). If you find loose connections, tighten and replace any damaged
components.
Make sure control board (29) power supply performing, if necessary, the CONTROL
BOARD (29) POWER SUPPLY TEST, of par. 3.3.1.
Replace power (32) and/or control (29) boards.
3.3.9 - In MIG, arc difficult to strike, the arc goes out immediately after lighting.
“Hot-Start”, “Soft Start” and “Impedance” functions, available in the “Service Functions”
menu (see Instruction Manual), can assist welding start.
Therefore, when dealing with start-up problems and difficulty in maintaining the arc, we
recommend:
− Carrying out welding tests, changing “Hot-Start”, “Soft Start” and “Impedance” functions
values and, if necessary, the working program with one similar to the one being used, if
available.
− Checking the compatibility of the torch with the type of welding being carried out, and
especially matching the torch nozzle with the wire being used.
− Checking the wear status of the torch and its components, replacing them if necessary.
− Replace the control board (29).
3.3.10 - When start button is released, the wire sticks to the workpiece (ineffective motor
braking).
WIRE FEEDER MOTOR (31) BRAKING TEST.
‰ Control board (29), connector J8, terminals 2 and 1 (gnd) = fig. 5.2.1, upon releasing the start
button and with open-circuit power source. The wire feeder motor stops immediately.
YES
Correct?
NO
♦ If fig. 5.2.2 is found (the motor slows from its own inertia), the braking circuit on
the control board (29) does not work, replace control board (29).
♦ Carry out the WIRE FEEDER MOTOR (31) TEST, par. 3.3.6.
♦ Make sure that there are no mechanical impediments preventing the wire coil from stopping
despite the braking action of the motor (ex.: sliding by wire feeder rollers, improperly
adjusted roller spring).
♦ Replace the control board (29) and/or motor (31).
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3.4 - Error codes and alarm signals.
3.4.1 - 02 - EEPROM error.
Block due to software error. Replace the control board (29).
3.4.2 - 10 - Malfunction in the circuit to detect short-circuits at the output.
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 10 indicates that a low output voltage (<45 Vdc) has been detected, with no output
current from the power source. This test is carried out only during the power source start-up.
This may be caused by an interruption in the inverter command circuits, or in the power
circuits, or in the output voltage detection line.
Check the wiring between power source +(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).
In case of “Error 10” carry out the open circuit operation test in par. 3.3.7.
If results are positive, replace control board (29).
3.4.3 - 42 - Wire feeder motor (31) fault.
This signal indicates a failure in the wire feeder motor (31) supply circuit.
In particular, motor supply voltage is generated but no motor current absorption is detected
(open circuit).
See WIRE FEEDER MOTOR (31) TEST, par. 3.3.6.
3.4.4 - 52 - “trG” on display (M). Start button pressed during start-up.
See START COMMAND TEST, par. 3.3.4.
3.4.5
- 53 - “trG” on display (M). Start button pressed while resetting from stop due to
temperature beyond allowable limits.
The high temperature alarm stops the power source with indication “tH0” on display (M), but
it doesn’t remain in memory. It is automatically reset when the temperature falls within the
allowed limits.
It may occur that the unit resets when the start command is present; therefore, to prevent the
power source from starting suddenly, due to a random reset, this situation is detected and causes
a stored block in the power source, with “trG” indication on display (M).
To restore proper functioning, remove the start command, and if necessary carry out the
START COMMAND TEST, par. 3.3.4.
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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 source +(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 source + 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.
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3.4.9 - 61 - Mains voltage lower than minimum limit.
3.4.10 - 62 - Mains voltage higher than maximum limit.
The control board (29) verifies the mains voltage by means the +24 Vdc supply voltage
check.
If the mains voltage results suitable, the power source gets ready for the operation; if instead it
is judged too low, the control commands the block for error 61, if too high commands the block
for error 62.
Check the wiring between J4 of power board (32) and J7 of control board (29) and, if
necessary, carry out the tests of par. 3.3.1, or replace power (32) and/or control (29) boards.
3.4.11 - 73 - “tH” on display (M), “0” on display (N) = output diode temperature excessive.
With this alarm we recommend do not shut off the power source, to keep the fans running and
thus allow rapid cooling. Normal operation is restored automatically as soon as the temperature
returns within the allowed limits.
If the alarm occurs repeatedly, we recommend that you:
− Make sure that air flows smoothly, and there is no dust or other impediments to cooling in the
aeration tunnels.
− Check the fans (27) supply voltage, on J2 and J3 of power board (32), terminals 1(+) and 2(-)
= +25 Vdc. If not correct, replace power board (32). If correct, verify fans (27) correct
operation and if defective replace them.
− Make sure that the working conditions comply with the specified values, especially observing
the “duty cycle”.
− Make sure the diode holding screws on the dissipater on the power board (32), are firmly
tightened.
− Make sure correct assembly and operation of the temperature sensor, mounted on the output
diode dissipater on power board (32); with ambient temperature, on the inductors L3(+) and
L2(-), on control board (29), must be measured a voltage of approximately +3 Vdc. If correct,
replace control board (29). If not correct, check the wiring between terminals 6 and 7 of J1
power board (32) and terminals 6 and 7 of J1 control board (29) (temperature control line)
and, if necessary, replace the temperature sensor on power board (32) or the power board (32)
complete.
− Replace the control (29) and/or power (32) boards.
3.4.12 - 99 - “OFF” on display (M). Incorrect mains voltage (machine shut off).
This signal normally appears whenever the power source is shut off.
When mains voltage is missing, for example after opening the switch (9), the control circuit
remains powered for a few seconds due to the effects of the DC-capacitor discharge on the
supply circuits and finding a supply voltage fast lowering, it commands the power source stop,
with “OFF” signaling.
This alarm is similar to error 61, which, being filtered, results more efficient on supply
voltage slow lowering.
If this signal is present with switch (9) closed and mains voltage present, carry out the
MAINS CONNECTION TEST and CONTROL BOARD (29) POWER SUPPLY TEST of par.
3.3.1.
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4
19
- COMPONENTS LIST
4.1 - Power source art. 283 : see file ESP283.pdf enclosed at the end of the manual.
4.2 - Components table: see file ESP283.pdf enclosed at the end of the manual.
4.3 - Spare parts list.
Essential spare parts.
Ref.
Code
29
32
5602282
5602280
Description
control board
power board
Qty.
1
1
Recommended spare parts.
Ref.
Code
7
9
27
31
35
3160179
3190014
5710532
5710358
1275.00
3.302.233
Description
solenoid valve
switch
fan
motor reducer
torch complete
Qty.
1
1
1
1
1
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20
5 - ELECTRICAL DIAGRAMS
5.1 - Power source art. 283 : see file SCHE283.pdf enclosed at the end of the manual.
5.2 - Waveforms.
5.2.1
- Wire feeder motor (31) voltage during correct braking (par. 3.3.10).
5.2.2
- Wire feeder motor (31) voltage during incorrect braking (par. 3.3.10).
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5.3 - Power board (32), code 5.602.280/B.
5.3.1
- Topographical drawing.
5.3.2
Conn.
J1
J1
J1
J1
J1
J1
J1
J2
J3
J4
- Connector table.
Terminals
Function
1-2
NU.
3
RL1 rele command input (precharge 1).
4
RL2 rele command input (precharge 2).
5
RL3 rele command input (solenoid valve).
6(+) - 7(-)
temperature sensor analog signal output.
8
+14 Vdc supply voltage input.
9(+) - 10(-)
“power source output voltage” signal output.
1(+) - 2(-)
+24 Vdc fan (27) command output.
1(+) - 2(-)
+24 Vdc fan (27) command output.
1(+) - 2(-)
+35 Vdc approximately output, for wire feeder motor (31) control circuit voltage supply
(only present with power source output voltage).
J4
3(+) - 4(-)
PWM signal input, for igbt driver.
J4
5(+) - 10(-)
primary current feedback signal output, from TA.
J4
6(+) - 7(-)
+35 Vdc approximately output, for wire feeder motor (31) control circuit voltage supply
(only present with power source output voltage).
J4
9(+) - 8(-)
+24 Vdc control board (29) supply voltage output.
J5
2(+) - 1(-)
NU. (+35 Vdc approximately output, for wire feeder motor (31) control circuit voltage
supply (only present with power source output voltage).
J6
1(+) - 4(-)
NU. (+320 Vdc approximately, inverter power supply voltage).
J7
power source output voltage input (positive potential).
J8-J9
solenoid valve (7) command output.
TP2 - TP3
230 Vac power board (32) voltage supply input.
TP1
GND.
TP9
power board (32) output voltage output (negative potential).
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22
5.4 - Control board (29), code 5.602.269/A.
5.4.1
- Topographical drawing.
5.4.2
- Connector table.
Conn.
J1
J1
J1
J1
J1
J1
J1
J2
J3
J4
J5
J6
J7
Terminals
1-2
3
4
5
6(+) - 7(-)
8
9(+) - 10(-)
1(+) - 2(-)
1-2
1(+) - 2(-)
J7
J7
J8
3(+) - 4(-)
5(+) - 6(-)
2(+) - 1(-)
3.302.233
Function
NU.
RL1 rele command output (precharge 1).
RL2 rele command output (precharge 2).
RL3 rele command output (solenoid valve).
temperature sensor analog signal input.
+14 Vdc supply voltage output.
“power source output voltage” signal input.
NU. (board programming).
PWM signal output, for igbt driver.
NU.
NU.
power source start signal input, from torch button.
+35 Vdc approximately input, for wire feeder motor (31) control circuit voltage supply
(only present with power source output voltage).
+24 Vdc input, for control board (29) supply voltage.
primary current feedback signal input, from TA.
wire feeder motor (31) voltage supply output.
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Art. 283
14
Art. 283
pos DESCRIZIONE
DESCRIPTION
01
LATERALE FISSO
FIXED SIDE PANEL
02
SUPPORTO MANICO
HANDLE SUPPORT
03
MANICO
HANDLE
04
COPERCHIO
COVER
05
CORNICE
FRAME
06
PANNELLO POSTERIORE
BACK PANEL
07
ELETTROVALVOLA
SOLENOID VALVE
08
COPERTURA
COVER
09
INTERRUTTORE
SWITCH
10
PRESSACAVO
STRAIN RELIEF
11
CAVO RETE
POWER CORD
12
PANNELLO ALETTATO
FINNED PANEL
13
CERNIERA
HINGE
14
LATERALE MOBILE
HINGED SIDE PANEL
15
CHIUSURA
CLOSING
16
ROSETTA
WASHER
17
SUPPORTO BOBINA
COIL SUPPORT
18
FONDO
BOTTOM
19
PIEDE
FOOT
20
SUPPORTO MOTORE
MOTOR BRACKET
21
CHIUSURA
CLOSING
22
PRESA
SOCKET
23
CORPO ADATTATORE
ADAPTOR BODY
24
MANOPOLA
KNOB
25
PANNELLO ANTERIORE
FRONT PANEL
26
COPERTURA
COVER
27
MOTORE CON VENTOLA
MOTOR WITH FAN
28
IMPEDENZA
CHOKE
29
CIRCUITO DI CONTROLLO
CONTROL CIRCUIT
30
RULLO TRAINAFILO
WIRE FEED ROLLER
31
MOTORIDUTTORE
WIRE FEED MOTOR
32
CIRCUITO DI POTENZA
POWER CIRCUIT
33
PIANO INTERMEDIO
INSIDE BAFFLE
34
CAVO MASSA
EARTH CABLE
35
TORCIA COMPLETA
COMPLETE TORCHE
La richiesta di pezzi di ricambio deve indicare sempre: numero di articolo, matricola e data di acquisto della macchina, posizione e quantità
del ricambio.
When ordering spare parts please always state the machine item and
serial number and its purchase data, the spare part position and the
quantity.
15