ESAB Aristo Mig 3001i Service Manual Download Page 19 | Manualshive

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S0740 800 196/E101019/P76

- 19 -

ca41_15_1

15AP1 Power board

The power board carries the charging circuit, the gate driver circuit, the switching circuit and
the overvoltage and undervoltage protection circuits.

WARNING!

Dangerous voltage - mains voltage. Never make any measurements on this board
when the machine is connected to the mains supply.

On pages 46 and 50 there are instructions on how to check the power board.

15AP1:1

Internal power supply

The board is supplied with 24 V AC from winding S1 on auxiliary transformer
2TC1. This winding must

never

be mixed-up with the other 24 V winding on

this transformer. 0 VA is galvanic connected to the mains supply.

15AP1:2

Temperature monitoring

NTC IC3 and NTC IC8 are fitted inside the IGBT modules IC3 and IC8.
The temperature monitoring circuit operates when the temperature exceeds
110

_

C and resets at 50

_

C.

See also the description and principal diagram on page 30.

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Summary of Contents for Aristo Mig 3001i

Page 1: ...0740 800 196 Valid for serial no 833 xxx xxxx to 039 xxx xxxx 101019 Aristo Origo Mig 3001i Tig 3001i Service manual ...

Page 2: ...5 Gate driver stages and switching circuits 22 15AP1 6 Fan control 22 15AP1 Component positions 23 15AP2 Secondary board 24 15AP2 1 Diode modules 24 15AP2 2 Temperature monitoring 24 15AP2 Component positions 25 20AP1 Control board 26 20AP1 1 Power supply 27 20AP1 2 Fan control 27 20AP1 3 The CAN bus 28 Communication interruptions 29 Terminating resistors 29 20AP1 4 Temperature monitoring 30 20AP1...

Page 3: ...CTION OF TERMINATING RESISTORS 61 Mig 3001i 61 Power source without MMC 61 Power source without MMC and with remote control 62 Power source with MMC 62 Power source with MMC and remote control 62 Power source with MMC and wire feeder with MMC 63 Power source with MMC wire feeder with MMC and remote control 63 Tig 3001i 63 Power source with MMC 63 Power source with MMC and remote control 63 IN SERV...

Page 4: ... 039 xxx xxxx Tig 3001i with serial number 840 xxx xxxx 950 xxx xxxx 039 xxx xxxx The Mig 3001i and Tig 3001i are designed and tested in accordance with international and European standards IEC EN 60974 On completion of service or repair work it is the responsibility of the person s performing the work to ensure that the product still complies with the requirements of the above standard CAUTION Re...

Page 5: ...the following main functions 1 MMC module The control panel and display 2 Mains module Mains interference suppressor mains switch auxiliary transformer 10 TIG module Comprises all TIG functions 15 Power module This module is a dual forward inverter operating at a switching frequency of 2 x 40 kHz IGBT transistors are used as the switching elements All power semiconductors are built into modules 20...

Page 6: ...le load at MMA 30 duty cycle 60 duty cycle 100 duty cycle 300 A 32 V 230 A 29 2 V 190 A 27 6 V 300 A 32 V 230 A 29 2 V 190 A 27 6 V Power factor at maximum current MIG MAG TIG MMA 0 90 0 89 0 90 0 89 0 90 Efficiency at maximum current MIG MAG TIG MMA 85 82 84 81 84 Open circuit voltage without VRD function 1 VRD function deactivated 2 VRD function activated 2 67 V DC 60 V DC 35 V 67 V DC 60 V DC 3...

Page 7: ...uty cycle The duty cycle refers to the time as a percentage of a ten minute period that you can weld at a cer tain load without overloading The duty cycle is valid for 40 C The duty cycle is valid for 40 C Enclosure class The IP code indicates the enclosure class i e the degree of protection against penetration by solid objects or water Equipment marked IP23 is designed for indoor and outdoor use ...

Page 8: ...ion number 0 99 Component description Component Description 1 MMC module Wire numbers 100 199 This module is described in a separate service manual for the control panels See page 14 2 Mains module Wire numbers 200 299 2AP1 2BR1 Interference suppressor board with main rectifier Power sources with cooling unit have a different version of the suppressor board than power sources without cooling unit ...

Page 9: ...1 8 on page 31 15C1 15C2 Smoothing capacitors 15D1 15D2 Rectifier and freewheel diode modules Each module consists of two diodes During the time interval between the voltage pulses from transformers 15TM1 and 15TM2 the freewheel diodes maintain the welding current from inductor 15L3 See page 54 for assembly instructions for the diode modules 15EV1 15EV2 Fans 24 V DC See the description of 20AP1 2 ...

Page 10: ...S0740 800 196 E101019 P76 Mig 3001i 10 ca41_00 ...

Page 11: ...S0740 800 196 E101019 P76 Placement of the circuit boards Mig 3001i 11 ca41_00 ...

Page 12: ...S0740 800 196 E101019 P76 Tig 3001i Placement of the circuit boards Tig 3001i 12 ca41_00 ...

Page 13: ...S0740 800 196 E101019 P76 13 ca41_00 ...

Page 14: ...wer source control board then there is no welding data board included in the MMC unit The power source the wire feed unit and the welding data unit each have their own microprocessor for control with the welding data unit being the central unit in the system In addition to storing and issuing welding data it also exercises overall control of the system as a whole MMC unit for the Mig 3001i A24 is ...

Page 15: ...when the voltage is below 575 V AC RMS this corresponds to a peak voltage of 810 V Terminal F is not fitted to suppressor boards used in power sources without cooling unit From serial no 039 xxx xxxx all suppressor boards are supplied with terminal F Main rectifier 2BR1 is fitted on the heat sink See the fitting instruction on page 54 Component positions 2AP1 with terminal F Component positions 2A...

Page 16: ... When the torch switch is released and the gas post flow time has elapsed the gas valve is deactivated 10AP1 4 HF generator When the welding torch switch is operated and the open circuit voltage is over 50 V relay RE2 closes and turns on the HF generator TR1 It remains activated until the arc strikes or for a maximum of 0 5 seconds The voltage on the primary side of HF transformer 10TV1 is about 5...

Page 17: ...tch The torch switch is supplied at 42 V AC This voltage is rectified and energizes optocoupler IC1 when the torch switch is closed 10AP1 6 Signal transfer 20AP1 20AP2 Power supply and signal transfer for 20AP2 see 20AP2 1 on page 37 10AP1 Component positions ...

Page 18: ...IC8 and the diode modules 15D1 and 15D2 are all mounted on a heat sink Schematic diagram of the power module If circuit boards 15AP1 or 20AP1 are replaced the gate pulse waveforms must be checked afterwards and the machine must be soft started See page 50 See the instructions on Page 54 concerning mounting of the components on the heat sink 2BR1 15AP1 with IC3 and IC8 15D1 and 15D2 WARNING The pow...

Page 19: ...50 there are instructions on how to check the power board 15AP1 1 Internal power supply The board is supplied with 24 V AC from winding S1 on auxiliary transformer 2TC1 This winding must never be mixed up with the other 24 V winding on this transformer 0 VA is galvanic connected to the mains supply 15AP1 2 Temperature monitoring NTC IC3 and NTC IC8 are fitted inside the IGBT modules IC3 and IC8 Th...

Page 20: ...15C1 and 15C2 falls outside the permitted interval of 300 715 V DC which is equivalent to a mains voltage of 212 505 V AC In the event of a fault the display panel will show fault code 5 The fault state will not be reset until the DC voltage is within 400 to 650 V During normal operating conditions the voltage between pins CN08 6 and 7 on circuit board 15AP1 is about 0 1 V Optocoupler IC4 is used ...

Page 21: ... at pulse transformer TR2 transistor Q19 pulls the shutdown signal to 0VA PWM circuit IC2 generates gate pulses to the thyristor in IGBT module IC8 the thyristor short circuits resistors R15 and R16 Resistors R17 and R18 are potential dividers and discharge resistors for 15C1 and 15C2 The PWM circuit generates a reference voltage 5 1 V this is used by the over under voltage and temperature monitor...

Page 22: ...anic isolation of the drive circuits from controller board 20AP1 If an IGBT module has failed both the power board and the modules Q3 and Q8 must be replaced Failure of either module always subjects rectifier bridge 2BR1 to a high current surge which substantially reduces its life We therefore recommend that the rectifier bridge should also be replaced if the modules have failed See page 46 for in...

Page 23: ...S0740 800 196 E101019 P76 15AP1 Component positions 23 ca41_15_1 ...

Page 24: ...interval between two voltage pulses the freewheel diode maintain the welding current from inductor 15L3 If a diode module has failed both diode modules must be replaced and fitted in accordance with the instructions on page 54 15AP2 2 Temperature monitoring NTC D1 and NTC D2 are fitted inside the diode modules 15D1 and 15D2 NTC R28 is fitted on the copper foil of circuit board 15AP2 The temperatur...

Page 25: ...ns Note There are two versions of 15AP2 The second version of the board includes filter components R33 C13 and D6 that are important for the VRD function Any of the circuit board versions can be used for power sources without VRD specification on the rating plate ...

Page 26: ...nd software If wrong board is used it might cause serious damage to the power source Make sure that the replacement board has correct article number see the spare parts list Circuit board identity Mig 3001i and Tig 3001i power source unit The control board has a machine ID a hardware ID and a unit type number To read them you need the ESAT service kit see page 45 S The machine ID defines which typ...

Page 27: ...ey start and run at full speed for a short moment before shutting down until welding starts The fan speed depends on the welding current For loads up to 110 A the fans run at low speed supplied at about 18 V At load currents above 110 A the fans are supplied at 24 V and run at full speed On conclusion of welding the fans continue to run for 6 5 minutes If the welding current is above 110 A and the...

Page 28: ...connected in parallel to the connectors CAN_A and CAN_B The 12V_Can and 0V_Can power supply is unregulated and is galvanically isolated from other parts of the control board The shell of the CAN connectors is connected to 0V_Can GND in the diagram above is connected to the power source chassis Voltage regulator VR1 supplies a 5 V power supply to the CAN circuits on 20AP1 Bus communication circuits...

Page 29: ...s 60 ohm To check the resistance turn off the power source and measure the resistance between pins I and J in connector socket XS3 S All screen connections must be sound Measure the resistance between the shell of the CAN connector connected to the MMC unit and the shell of the most distant CAN connector on the CAN bus There must be a short circuit between those two end points S Good contact with ...

Page 30: ...ors in different equipment configurations 20AP1 4 Temperature monitoring Principle diagram of the temperature monitoring circuits The temperature monitoring circuit operates when the temperature exceeds 110 _C and resets at 50 _C NTC D1 and NTC D2 are fitted inside the diode modules D1 and D2 NTC R28 is fitted on the cupper foil of circuit board 15AP2 NTC IC3 and NTC IC8 are fitted inside the IGBT...

Page 31: ...ard 20AP1 is 150 mA at 300 A and is proportional to the current Measuring the voltage between contacts S3 and S4 on circuit board 20AP1 must show 0 195 V at 100 A welding current U R x I 3 91 x 0 05 0 195 If circuit boards 20AP1 or 15AP3 are replaced the power source must be recalibrated See page 57 for calibration instructions Offset potentiometer R201 is not mounted on circuit board 20AP1 The of...

Page 32: ...ructions Methods of measuring the arc voltage Various methods of measurement are available The jumper between contacts Y2 and Y3 must always be connected S Welding with the filler wire positive voltage sensing from the wire This is the most common arrangement for MIG welding This method of measurement compensates for the voltage drop in the supply conductor to the welding torch The input signal is...

Page 33: ...respectively 32 V All welding methodes all versions of 20AP1 If the welding arc extinguishes the open circuit voltage is about 90 V peak voltage Within 0 3 seconds the open circuit voltage is at a level controlled by the open circuit voltage control or at a lower level Note Spare part boards are delivered with the VRD function deactivated See page 34 for identification of circuit board versions MI...

Page 34: ...service kit see page 45 The print number is to the right in the component positions diagrams on pages 35 and 36 The print number is NOT the same as the ordering number of the board Version 1 of 20AP1 Hardware ID 5 Print numbers up to and including 487200 003 Power sources with serial no 835 xxx xxxx and 840 xxx xxxx are delivered with version 1 of 20AP1 Version 2 of 20AP1 Hardware ID 9 Print numbe...

Page 35: ...S0740 800 196 E101019 P76 20AP1 Component positions version 1 35 ca41_20_1 ...

Page 36: ...S0740 800 196 E101019 P76 20AP1 Component positions version 2 36 ca41_20_1 ...

Page 37: ...a relay fault the entire board must be replaced 20AP2 1 Power supply The relay board is supplied at 24 V from control circuit board 20AP1 Power supply of the relay board for MIG power sources Power supply of the relay board for TIG power sources 20AP2 2 Power supply to the cooling unit The cooling water pump is controlled by the software in the welding data unit ...

Page 38: ...rates a command to start the pump If water flow is not detected within 15 seconds the pump is stopped 3 If welding does not start within 6 5 minutes the pump is stopped If the water flow stops when the pump is started the display shows fault code 29 The pump is stopped if the ELP switch opens Welding start 1 The welder presses the trigger switch on the welding torch 2 The water pump starts if the ...

Page 39: ...e with a gas pressure monitor The processor reacts to voltage flanks from the input The power sources are not normally fitted with gas pressure monitors which means that this input must be short circuited by a jumper If the jumper is open fault code 32 is displayed 20AP2 Component positions 20AP2 Circuit diagram ...

Page 40: ...ed in two ways by test routines that are run on initiation and by functions that can detect a fault when it occurs The control panel displays a unit number to indicate which unit has generated the fault The following unit numbers are used U0 welding data unit U1 cooling unit U2 power source U3 wire feed unit U4 remote control unit Summary of fault codes Fault code Description Welding data unit Pow...

Page 41: ...isable any functions The program memory is damaged This is a serious fault that can have unforeseen effects Action Restart the power source If the fault persists load new software via ESAT If the fault still persists replace circuit board 20AP1 which carries the memory chip 2 Microprocessor RAM error The microprocessor is unable to read write from to a particular memory address in its internal mem...

Page 42: ...rloading fan not working properly cooling air inlets or outlets blocked or obstructed or dirt on the heat exchanger 8 15 V power supply on circuit board 20AP1 The voltage is too high or too low it must be within the range 14 1 15 9 V This fault does not disable any functions 9 15 V power supply on circuit board 20AP1 The voltage is too high or too low it must be within the range of 14 2 to 16 4 V ...

Page 43: ... has prevented the processor from performing its normal program duties The program restarts automatically The current welding process will be stopped This fault does not disable any functions This fault should never occur in reality Contact ESAB if the fault does occur 28 Stack overflow The stack memory is full This fault should never occur in reality the fault code is intended as an aid during de...

Page 44: ...c charge so you should not bring unnecessary nonconductive items into the work area It is obviously difficult to avoid all such items so various means are used to drain off any static discharge from persons to prevent the risk of ESD damage This is done by simple devices wrist straps connected to ground and conductive shoes Work surfaces carts and containers must be conductive and grounded Use onl...

Page 45: ...rap and cable with an inbuilt protective resistor Antistatic service kit ESAT service kit The software update is made from a PC it has to be managed by a trained serviceman For this a PC program called ESAT ESAB Software Administration Tool is needed The PC is connected to the welding equipment by a cable connector and a CAN reader From the ESAT it is possible to update the software ESAT also cont...

Page 46: ...ircuited between collector and gate 3 Use a multimeter in diode test position Measure with the positive and negative of the multimeter connected as shown in the pictures The main transformers must be connected to the circuit board The forward voltage drop of the deenergization diode connected in parallel with the antiparallel diode of the transistor must be 0 3 to 0 5 V 4 The NTC resistors that se...

Page 47: ...S0740 800 196 E101019 P76 Power board 15AP1 measuring points 47 ca41f2pwr ...

Page 48: ...2 to 0 45 V The voltage drop over the freewheel diodes is slightly lower than the voltage drop over the rectifier diodes This because the freewheel diodes are connected in parallel b Remove the insulation between the transformers and the circuit board Refit the screws 1a and 1b tighten the screws on the circuit board to the torque that is shown in the picture on page 56 Checking the NTC resistors ...

Page 49: ...S0740 800 196 E101019 P76 49 ca41f2pwr Secondary board 15AP2 measuring points ...

Page 50: ... 15AP1 as shown below Connector C must only be connected if there is an interuption in the temperature monitoring circuits SST 2 connected to 20AP1 and 15AP1 Measurements The item numbers below refer to the circuit and component position diagrams on pages 52 and 53 1 Connect the machine to the mains and switch it on 2 24 V AC from transformer 2TC1 must be 21 27 V 3 24 VA must be 24 V 5 4 15 VA mus...

Page 51: ... interruption in the connection to the pulse transformer the pulses are shaped as shown in the graph to the left 10 Gate pulses to the IGBTs S Measure with the probe connected to the gate S The pulse frequency must be 40 kHz 1 kHz S The pulse duration must be 40 44 of the cycle time measured at 5 V as shown in the graph to the right 11 Primary side of the main transformers S Measure with the probe...

Page 52: ...ansformers S Measure with the probe connected to T11 and T22 respectively S The shape of the pulses must be as in the graph to the right 13 Measure the output voltage from the welding current terminals XS1 and XS2 It must be about 2 9 to 3 1 V Soft starting measuring points ...

Page 53: ...S0740 800 196 E101019 P76 Soft starting measuring points power board 15AP1 53 ca41f2soft ...

Page 54: ...s of the components The purpose of the paste is to fill out any hollows in the surfaces of the components and the heat sink Those parts of the component and the heat sink that are in true metallic contact may already have good thermal contact 3 Mount the components as described below Rectifier bridge 2BR1 1 Clean the heat sink and apply thermal conducting paste as described above 2 Fit the bridge ...

Page 55: ...dules to the heat sink to a torque of 2 5 Nm and then further tighten them to 4 5 Nm WARNING Incorrectly fitted components can cause failure Do not tighten the screws to more than 4 5 Nm 3 Tighten the remaining screws on the circuit board to the torque that is shown in the picture below Note If capacitors 15C1 15C2 or transformers 15TM1 15TM2 have to be replaced the power board must be removed and...

Page 56: ...ing paste to the diode modules as described on page 54 5 Fit the the circuit board with the diode modules to the heat sink 6 Tighten the screws that holds the modules on the heat sink to a torque of 2 5 Nm and then further tighten them to 4 5 Nm 7 Tighten the remaining screws as shown in the picture below WARNING Incorrectly fitted components can cause failure Do not tighten the screws to more tha...

Page 57: ... source so that the voltage across the load is 24 V Circuit diagram for the current calibration 6 Measure the shunt voltage using a calibrated multimeter 7 Using potentiometer R21 on circuit board 20AP1 adjust the shunt voltage to correspond to 100 A 1 A Position of potentiometer R21 on circuit board 20AP1 8 Check the current at low values as well 16 A at 19 22 V for which the tolerance is 1 A If ...

Page 58: ...the power source Connect long welding current cables to give an appreciable voltage drop in the cables Connect a wire to the feed rollers and connect an external voltmeter as shown in the diagrams on next page Set the power source to MIG short arc welding mode and apply a resistive load to give a current of 100 A at 25 30 V Start the power source from the welding gun trigger contact and adjust the...

Page 59: ... with the filler wire negative voltage sensing from the wire V external voltmeter R load resistor The control panel must show the same voltage value as shown on the external voltmeter 0 6 V Adjust the display value by means of potentiometer R103 3 Welding with the filler wire positive or negative no external sensing from the wire or workpiece V external voltmeter R load resistor The external voltm...

Page 60: ... plug 10XS1 from terminal F on circuit board 10AP1 see the wiring diagram Set the power source to the MMA welding mode 1 Set a welding current of about 100 A supplying it to a resistive load so that the voltage is 25 30 V Using an external voltmeter measure the voltage across the welding current terminals 2 Using the potentiometer adjust the value shown on the display so that the voltage shown is ...

Page 61: ...e processor on a separate board named the welding data board The welding data board is enclosed in the MMC unit In MMA and TIG applications the WDU uses a part of the processor of the power source control board Symbol explanation Fixed terminating resistor on circuit board Terminating resistor on circuit board disconnected Terminating resistor on circuit board connected by a jumper The welding dat...

Page 62: ...nit MMC WDU Remote control Feasible MMC units are MA23 MA24 MA6 and U6 Power source Wire feed unit MMC WDU Remote control Feasible MMC unit is U8 Power source with MMC MMC WDU Power source Feasible MMC unit is A24 Power source with MMC and remote control MMC WDU Remote control Power source Feasible MMC unit is A24 ...

Page 63: ...re MA23 MA24 MA6 and U6 Power source with MMC wire feeder with MMC and remote control Wire feed unit MMC WDU Remote control MMC WDU Power source Feasible MMC unit for the power source is A24 Feasible MMC units for the wire feed unit are MA23 MA24 MA6 and U6 Tig 3001i Power source with MMC MMC Power source WDU MMC TA23 or TA24 Power source with MMC and remote control MMC Power source WDU Remote con...

Page 64: ...st 1MΩ and indicate mean value Periodic inspection and test Periodic inspection and test shall be carried out in accordance with manufacturers instructions and local regulations The periodic inspection and test consists of S Visual inspection see Visual inspection page 65 S Electrical test see Electrical test page 66 The inspection and test shall be documented in a test report see Test report page...

Page 65: ...d performance 3 Welding circuit S defective damaged cable S deformed faulty or thermally damaged coupler sockets S ineffective cable anchorage S cables and coupler unsuitable for the intended use and performance 4 Enclosure S missing or damaged parts S unauthorised modifications S cooling openings blocked or missing air filters S signs of overload and improper use S missing or defective protective...

Page 66: ... Use the ESAB testbox TB 1 If the welding power source has an activated VRD function then proceed to step 5 a Connect the positive 3 and negative 4 welding outlets to the positive and negative terminals DCIN of the TB 1 b Connect a voltmeter to VPEAK of the TB 1 c Connect the welding power source to the mains supply d Turn the control knob of the TB 1 anti clockwise to 0 2 e Turn the mains switch ...

Page 67: ...er souce to maximum h Check the voltage with the voltmeter S Measured value shall not exceed 35 V i Check that the LED indicates active VRD function by a steady green light j Turn the mains switch of the the welding power source to OFF k Disconnect the welding power source from the mains supply Test box TB 1 Circuit diagram of the TB 1 ...

Page 68: ...lue less than 0 5 Ω S Measure L3 L3 of 2AP1 Required value less than 0 5 Ω g Reassemble the cover 3 Tig 3001i Check the magnetic gas valve a Operate the trigger of the torch and check by means of the of the gas flow wether the magnetic gas valve operates b Pressurize the system and verify that there is no leakage 4 Check signal and control lamps Check the function of the display indicators by turn...

Page 69: ...onductor resistance 0 3 Ω Insulation resistance ÉÉÉÉ ÉÉÉÉ ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ Input circuit Welding circuit 500 VDC 5 MΩ Welding circuit Protective circuit 500 VDC 2 5 MΩ Input circuit Protective circuit 500 VDC 2 5 MΩ No load voltage ÉÉÉÉ ÉÉÉÉ ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ without VRD Vpeak 113 VDC with VRD activated Vpeak 35 VDC Electrical test PASSED FUNCTIONAL TEST PASSED Remarks...

Page 70: ...y Note Mains supply requirements High power equipment may due to the primary current drawn from the mains supply influence the power quality of the grid Therefore connection restrictions or requirements regarding the maximum permissible mains impedance or the required minimum supply capacity at the interface point to the public grid may apply for some types of equipment see technical data In this ...

Page 71: ...2 5 mm2 4G2 5 mm2 Phase current Ieff 10 A 10 A Fuse anti surge type C MCB 16 A 16 A 16 A 16 A NOTE The mains cable areas and fuse sizes as shown above are in accordance with Swedish regulations Use the welding power source in accordance with the relevant national regulations OPERATION General safety regulations for the handling of the equipment can be found in the instruction manual Read through b...

Page 72: ...g gas Fan control The power source has a time control that means that the fans continue to run for 6 5 minutes after welding has stopped and the unit switches to energy saving mode The fans start again when welding restarts The fans run at reduced speed for welding currents up to 110 A and at full speed for higher currents Overheating protection The welding power source has overheating protection ...

Page 73: ...gs from the supplier cease to apply if the customer himself attempts any work in the product during the guarantee period in order to rectify any faults Power source Check regularly that the welding power source is not clogged with dirt Clogged or blocked air inlets and outlets otherwise result in overheating How often and which cleaning methods apply depend on the welding process arc times placeme...

Page 74: ...ped indicated in the control panel S Check the mains power supply fuses The overloading protection trips frequently S Check to see whether the dust filter is clogged S Make sure that you are not exceeding the rated data for the power source i e that the unit is not being overloaded Poor welding perform ance S Check that the welding and return cables are correctly connected S Check that the correct...

Page 75: ...S0740 800 196 E101019 P76 75 emptypage ...

Page 76: ... 31 50 92 22 ESAB international AB Gothenburg Tel 46 31 50 90 00 Fax 46 31 50 93 60 SWITZERLAND ESAB AG Dietikon Tel 41 1 741 25 25 Fax 41 1 740 30 55 North and South America ARGENTINA CONARCO Buenos Aires Tel 54 11 4 753 4039 Fax 54 11 4 753 6313 BRAZIL ESAB S A Contagem MG Tel 55 31 2191 4333 Fax 55 31 2191 4440 CANADA ESAB Group Canada Inc Missisauga Ontario Tel 1 905 670 02 20 Fax 1 905 670 48...

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