Kemppi Kempact RA 181A, 251R, 251A, 253R, 253A, 323R, 323A welding machine Service manual

SERVICE MANUAL
KEMPACT RA
181A
251R/251A
253R/253A
323R/323A
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SERVICE MANUAL
1 (32)
KEMPACT RA
CONTENTS
1. PARTS OF MACHINE................................................................................................................................................................................ 3
2. TECHNICAL INFORMATION ..................................................................................................................................................................... 6
2.1. Technical data ................................................................................................................................................................................ 6
2.2. Main circuit diagrams ..................................................................................................................................................................... 8
3. DESCRIPTION OF OPERATIONS ............................................................................................................................................................. 10
3.1. Main components ........................................................................................................................................................................ 11
3.1.1. Terminal block X001............................................................................................................................................................. 11
3.1.2. Varistors R001 ...................................................................................................................................................................... 11
3.1.3. Main switch S001 ................................................................................................................................................................. 11
3.1.4. Terminal block X009............................................................................................................................................................. 11
3.1.6. Test connector X006 ............................................................................................................................................................ 11
3.1.7. Auxliary transformer T002 and rectifier bridge G003 .......................................................................................................... 11
3.1.8. Control card A001 ................................................................................................................................................................ 11
3.1.8.1. Auxiliary power supply ................................................................................................................................................ 11
3.1.8.2. Microcontroller ............................................................................................................................................................ 11
3.1.8.3. Motor control .............................................................................................................................................................. 11
3.1.8.4. PWM ............................................................................................................................................................................ 12
3.1.9. Fans M001, M002 ................................................................................................................................................................ 12
3.1.10. Solenoid valve Y001 ........................................................................................................................................................... 12
3.1.11. Wire feed motor M003 ...................................................................................................................................................... 12
3.1.12. Brights led card P002 ......................................................................................................................................................... 12
3.1.13. Panel card P001 ................................................................................................................................................................. 12
3.1.14. Main transformer T001 ...................................................................................................................................................... 12
3.1.15. Secondary rectifier card Z002 ............................................................................................................................................ 12
3.1.16. Secondary choke L001 ....................................................................................................................................................... 12
3.1.17. Output RFI filter C001, C002 .............................................................................................................................................. 13
3.1.18. Output terminal X004 ........................................................................................................................................................ 13
3.1.19. Euro connector X005.......................................................................................................................................................... 13
3.2. Main circuit diagram 181-, 251-models ....................................................................................................................................... 13
3.2.1. PFC Choke L001 .................................................................................................................................................................... 13
3.2.2. PFC circuit auxiliary transformer T003 ................................................................................................................................. 13
3.2.3. Main circuit card Z001 ......................................................................................................................................................... 13
3.2.3.1. EMC Filter .................................................................................................................................................................... 13
3.2.3.2. Inrush current limiting ................................................................................................................................................. 13
3.2.3.3. IGBT driver ................................................................................................................................................................... 13
3.2.3.4. Current transformer T1 ............................................................................................................................................... 13
3.2.3.5. Main circuit .................................................................................................................................................................. 13
3.2.3.6. PFC Boost control circuitry .......................................................................................................................................... 13
3.3. Main circuit diagram 253-, 323-models ....................................................................................................................................... 14
3.3.1. Main circuit card Z001 ......................................................................................................................................................... 14
3.3.1.1. EMC filter ..................................................................................................................................................................... 14
3.3.1.2. Inrush current limiting ................................................................................................................................................. 14
3.3.1.3. IGBT driver ................................................................................................................................................................... 14
3.3.1.4. Current transformer T1 ............................................................................................................................................... 14
3.3.1.5. Main circuit .................................................................................................................................................................. 14
4. MAIN CIRCUIT CARD Z001 .................................................................................................................................................................... 15
4.1. Kempact 181, 251 ........................................................................................................................................................................ 15
4.1.1. Connectors ........................................................................................................................................................................... 15
4.2. Kempact 253, 323 ........................................................................................................................................................................ 17
4.2.1. Connectors ........................................................................................................................................................................... 17
5. SECONDARY RECTIFIER CARD Z002 ...................................................................................................................................................... 19
5.1. Connectors ................................................................................................................................................................................... 19
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SERVICE MANUAL
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KEMPACT RA
6. CONTROL CARD A001 ........................................................................................................................................................................... 20
6.1. Leds .............................................................................................................................................................................................. 20
6.2. Connectors ................................................................................................................................................................................... 20
7. PANEL CARD P001 ................................................................................................................................................................................ 22
7.1. Connectors ................................................................................................................................................................................... 22
8. OPERATIONAL MEASURINGS AND TESTS ............................................................................................................................................. 23
8.1. Kempact 181, 251 ........................................................................................................................................................................ 23
8.1.1 Primary rectifier V24, 25 ....................................................................................................................................................... 23
8.1.2. IGBT module V1 ................................................................................................................................................................... 24
8.2. Kempact 253, 323 ........................................................................................................................................................................ 25
8.2.1. Primary rectifier, V1 ............................................................................................................................................................. 25
8.2.2. IGBT module, V2 ................................................................................................................................................................. 26
8.3. Secondary rectifier card, Z002 ..................................................................................................................................................... 27
8.4. PTC’s, overheat protection ........................................................................................................................................................... 28
8.5. Control card A001 ........................................................................................................................................................................ 28
9. MAIN COMPONENTS INSTALLATION .................................................................................................................................................... 28
9.1. Main circuit card Z001 .................................................................................................................................................................. 28
9.2. Secondary rectifier card Z002 ...................................................................................................................................................... 29
9.3. Other components ....................................................................................................................................................................... 29
10. ERROR CODES ..................................................................................................................................................................................... 30
General
Kempact RA(Regular / Adaptive ) welding machines are compact MIG/MAG welding machines designed for professional use.
The power source part of the machine is based on inverter technology. IGBTs are used as power switches in the inverter. Kempact RA welding machines also contain all circuitry that is needed to drive wire feeder part of the machine and also easy to use
intuitive user interface. Most of the welding machine functions are controlled using a microcontroller.
Before removing any covers or commencing any testing or measurement disconnect the power source from the mains voltage.
Dangerous DC voltage may still exist after the removal of the input voltage. Machine discharges the voltage while it is turned
off, but it is always better to ensure this by measuring the voltage.
Digital multimeters may give different values depending the specifications they have. For example diode measuring values may
vary between the multimeters models. Special attention must be considered while working with the internal parts.
The device may be repaired only by a person legally authorized to perform electrical work.
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SERVICE MANUAL
KEMPACT RA
1. PARTS OF MACHINE
Kempact RA (253, 323)
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SERVICE MANUAL
4 (32)
KEMPACT RA
Kempact RA (253, 323)
ITEM CODE
W005603
W005926
W005791
W006602
9568913
W004288
9771530
W005782
9792639
W005779
W006130
W006128
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PART
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5
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12
ITEM DESCRIPTION
FRAME WA KEMPACT RA
KEMPACT RA 3PH WF ASSEMBLY DT400 RI
KEMPACT WF MOUNTING FRAME INSULATOR
SOLENOID VALVE Kempact RA
HOSE CONNECTOR R1/8-6ML
INSULATION BUSHING
WELD CONNECTOR DIX 50 FEMALE
TERMINAL BLOCK INSULATING PLATE 3PH
CABLE CLAMP
TERMINAL BLOCK COVER KEMPACT RA
ANGLE SUPPORT RIGTH KEMPACT RA
ANGLE SUPPORT LEFT KEMPACT RA
PCS
1
1
1
1
1
5
1
1
1
1
1
1
QTY
1
1
1
1
1
1
1
1
1
1
1
1
SERVICE MANUAL
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KEMPACT RA
W006215
W006154
W006153
W006429
W003701
3133500
4265820
4270940
4267970
2062070
W005661
W006115
W005790
W005041
W002918
W005793
W005872
W005821
W005813
W006249
W006176
W006208
W005918
W006392
W006180
9449407
9441047
9547150
9476520
9420120
W001624
9449461
9449233
9433024
9433007
9433043
9433027
9410250
9432824
9410108
W006603
9425216
9592164
W006222
4292020
6184211T
4262810
W006201
W006234
W005681
4252013
9840486
13
16
18
19
20
54
23
24
26
26
27
28
29
30
32
33
34
36
37
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47
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50
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55
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61
67
COMPONENT FRAME ASSEMBLY KEMPACT RA
POLARITY CABLE TO DIX KEMPACT RA
POLARITY CABLE TO ADAPTER KEMPACT
POLARITY PROTECTION 25 MM2 MINUS
POLARITY PROTECTION 25 MM2 PLUS
LATCH FOR SPOOL HUB
SPECIAL NUT M16X1
PRESSURE SPRING HUB
BRAKE PAD
WIRE SPOOL HUB
PARTITION WIND PLATE KEMPACT RA
AIR GUIDE PLATE KEMPACT
LOWER COVER KEMPACT RA
SPOOL CASING COVER KEMPACT RA
FAN
LOWER GRILL KEMPACT RA
HINGE KEMPACT RA
LATHC LOCK KEMPACT RA
LATCH KEMPACT RA
DOOR WITH MARKING KEMPACT RA
PANEL BASE ASSY 3PH KEMPACT RA
PANEL FRAME ASSEMBLY KEMPACT R
PANEL COVER KEMPACT RA
PANEL COVER SPRING KEMPACT RA
HINGE PIN KEMPACT RA
PT-SCREW 4X16 WN1452 TX20 ZN BLPAS
ZN MPASSOCKET HEAD CAP SCREW M5X16 BN1206
CASTOR 250/50-20/60 MM
CIRCLIP 15X1.5 DIN 6799
WASHER M20 DIN 125 A ZN
SQUARE NUT M5 DIN 557
PT-SCREW 5X14 WN1452 TX20 ZN BLPAS
ZN MU SELF-TAPPING SCREW TX25 M5X16 DIN7500CE Z1N BLAC1K
TORX SCREW M4X10 DIN7985 T20 ZN BLACK
TORX SCREW M3X20 DIN7985 T15 ZN BLACK
TORX-SCREW M5X8 DIN7985 T25 ZN BLACK
TORX SCREW M4X20 DIN7985 T20 ZN BLACK
FLANGE NUT DIN6923 M6
14583 TX DIN6900-3
HEX NUTM8 DIN 934-8 ZN
FILTER MOUTH COVER KEMPACT RA
INTERNAL TAB WASHER D16 DIN 462 ZN
BOTTLE FASTENING BAND KEMPACT RA
CODING WIRE KEMPACT RA
HOSE
GROUNG CABLE 25-5
FLAT CABLE L = 175
KEMPACT 253R PRODUCT LABEL
RATING PLATE KEMPACT 253 R
MAIN CIRCUIT DIAGRAM KEMPACT RA 253 323
CONNECTOR 4 X 1.5MM2-5M
FOAMED PLASTIC SHEET 2MM
NOTE !
More info available from: [email protected] (email).
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0.5 M2
SERVICE MANUAL
6 (32)
KEMPACT RA
2. TECHNICAL INFORMATION
2.1. Technical data
Kempact 181A
Kempact 251R, 251A
Connection voltage
50/60Hz
230V+- 15% 1~
50/60Hz
240V+- 15% 1~
Rated power at max. current
50% ED I1max (180A)
5.16VkA/5.1kW
30% ED I1max (250A)
8.5kVA/8.4kW
Supply current
50% ED I1max (180A)
22A
30% ED I1max (250A)
36A
100% EDI1eff (140A)
16A
3G1.5 (1.5mm2,
5m)
100% EDI1eff (150A)
17A
3G2.5 (2.5mm2,
5m)
Type C
Welding range
16A
10V/20A 26V/180A
No load voltage
36V
Connection cable
H07RN-F
Fuse
Type C
Idle power
H07RN-F
20A
10V/20A 29V/250A
36V
35W
35W
Power factor at max.
180A/25,75V
0.99
250A/26.5V
0.99
Efficiency at 100% ED
Wire feed speed adjustment
range
140A/21V
0.82
150A/21.5V
0.82
Voltage adjustment range
Filler wires
wire spool
Weight
1.0-18.0m/min
8.0-26.0V
8.0-29.0V
Fe solid
0.8…1.2 mm
0.8…1.2 mm
Fe cored wires
0.8…1.2 mm
0.8…1.2 mm
Ss
0.8…1.2 mm
0.8…1.2 mm
Al
1.0…1.2 mm
1.0…1.2 mm
CuSi
0.8…1.0 mm
0.8…1.0 mm
max
300 mm/ 20 kg
CO2, Ar, Ar+CO2
mixed
300 mm/ 20 kg
CO2, Ar, Ar+CO2
mixed
LxWxH
Not including gun and
gables
623x579x1070 mm
Shielding gases
External dimensions
1.0-14.0m/min
44 kg
LxWxH
Not including gun and
gables
623x579x1070 mm
44 kg
Temperature class
F(155 C)
F(155 C)
EMC class
A
A
Degree of protection
IP23S
IP23S
Operating temperature range
-20…+40 °C
-20…+40 °C
Storage temperature range
-40…+60 °C
-40…+60 °C
Standards
IEC 60974-1
IEC 60974-1
IEC 60974-5
IEC 60974-5
IEC 60974-10
IEC 60974-10
IEC 61000-3-12
IEC 61000-3-12
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SERVICE MANUAL
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KEMPACT RA
Kempact 253R, 253A
Kempact 323R, 323A
Connection voltage
50/60Hz
400V+- 15% 3~
50/60Hz
400V +- 15% 3~
Rated power at max. current
40% ED I1max (250A)
8.34kVA/7.73kW
35% ED I1max (320A)
12kVA/11.3kW
Supply current
40% ED I1max (250A)
11.9A
35% ED I1max (320A)
17.2A
100% EDI1eff (150A)
6.1A
4G1.5 (1.5mm2,
5m)
100% EDI1eff (190A)
8.2A
4G1.5 (1.5mm2,
5m)
Type C
Welding range
10A
10V/20A 31V/250A
No load voltage
41V
Connection cable
H07RN-F
Fuse
Type C
Idle power
H07RN-F
10A
10V/20A 32.5V/320A
45V
25W
25W
Power factor at max.
250A/26.5V
0.93
320A/30V
0.94
Efficiency at 100% ED
Wire feed speed adjustment
range
150A/21.5V
0.88
190A/23.5V
0.86
1.0-18.0m/min
1.0-20.0m/min
8.0-31.0V
8.0-32.5V
Fe solid
0.8…1.2 mm
0.8…1.2 mm
Fe cored wires
0.8…1.2 mm
0.8…1.2 mm
Ss
0.8…1.2 mm
0.8…1.2 mm
Al
1.0…1.2 mm
1.0…1.2 mm
CuSi
0.8…1.0 mm
0.8…1.0 mm
max
300 mm/ 20 kg
CO2, Ar, Ar+CO2
mixed
300 mm/ 20 kg
CO2, Ar, Ar+CO2
mixed
LxWxH
Not including gun and
gables
623x579x1070 mm
Voltage adjustment range
Filler wires
wire spool
Shielding gases
External dimensions
Weight
44 kg
LxWxH
Not including gun and
gables
623x579x1070 mm
44 kg
Temperature class
F(155 C)
F(155 C)
EMC class
A
A
Degree of protection
IP23S
IP23S
Operating temperature range
-20…+40 °C
-20…+40 °C
Storage temperature range
-40…+60 °C
-40…+60 °C
Standards
IEC 60974-1
IEC 60974-1
IEC 60974-5
IEC 60974-5
IEC 60974-10
IEC 60974-10
IEC 61000-3-12
IEC 61000-3-12
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SERVICE MANUAL
KEMPACT RA
2.2. Main circuit diagrams
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SERVICE MANUAL
KEMPACT RA
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SERVICE MANUAL
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KEMPACT RA
3. DESCRIPTION OF OPERATIONS
Kempact RA welding machine consists of several circuit cards and separate components. In the following sections are
described the main components and separate cards functions.
Machine basic function (machine start up), after mains voltage is switched on:
1. DC-link capacitors are charged and if there is no over voltage condition inrush relay is switched on after a short delay
2. If there is PFC circuit it’s enabled after a short delay
3. Fans are started for a test run after a short delay
4. Welding is enabled
Kempact RA machines have following parts and components:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Terminal block X001
Varistors R001
Main switch S001
Terminal block X009
Main circuit card Z001
o EMC filter
o Inrush current limiting
o IGBT driver
o Current transformer T1
o Main circuit
PFC choke (181-, 251-models)
PFC circuit auxiliary transformer T003 (181-, 251-models)
Test connector X006
Auxiliary transformer T002
Rectifier bridge G003
Control card A001
Cooling fans M001 and M002
Gas valve Y001
Wire feed motor M003
Brights led card P002
Panel card P001
Main circuit card Z001
Secondary rectifier card Z002
Secondary choke L001
Output RFI filters C001 and C002
Euro connector X005
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KEMPACT RA
3.1. Main components
3.1.1. Terminal block X001
•
Mains cable is connected to the terminal block X001. The terminal block is located in the mains cable connection box
on the back plate of the machine. Also varistors R001 are connected to this terminal block. From the terminal block
mains voltage is wired to main switch S001
3.1.2. Varistors R001
•
•
The varistors are located in the mains cable connection box on the backside of the welding machine
The purpose of the varistors is to protect the welding machine against voltage spikes coming from the mains
3.1.3. Main switch S001
•
The main switch is located in the upper part of the machine close to the user interface
3.1.4. Terminal block X009
•
•
From the main switch S001 mains voltage is wired to terminal block X009 which is located on the front side of the
component frame. From this terminal block mains voltage is wired to the main circuit card Z001
PE (protective earth) is wired from this terminal block into the component frame and connected to a chassis ground
terminal
3.1.6. Test connector X006
•
Possible to measure DC-link voltage during service
3.1.7. Auxliary transformer T002 and rectifier bridge G003
•
•
•
•
•
Auxliary transformer is a 60VA toroidal transformer
It has 230V and 400V inputs and 18V output
230V input is used in 181 and 251 machines
400V input is used in 253 and 323 machines
Auxliary transformer output voltage is rectified using rectifier bridge G003. Both the auxiliary transformer and the
rectifier bridge are located inside the component frame
3.1.8. Control card A001
3.1.8.1. Auxiliary power supply
•
•
•
Auxliary voltage +24V is used by fans, gas valve, inrush relay and brights LED. This voltage is also used to drive optocoupler that enables PFC and panel backlight. To generate +24V voltage auxliary transformer T002 output is full wave
rectified using rectifier bridge G003
Auxliary voltage +15V is used by IGBT driver (V20, V22, V23, V25 etc.), PWM IC (N5), motor control half bridge driver
(N2) and other circuits
Auxliary voltage +5V is used by microcontroller N7, panel card P001 and other circuits
3.1.8.2. Microcontroller
•
•
Many of the control card A001 functions are using the microcontroller N7. Basic functions of the microcontroller
include controlling output voltage of the inverter. The microcontroller measures output voltage and changes peak
current reference of the inverter to regulate it
The microcontroller also regulates wire feed speed by setting motor current reference and measuring EMF of the
motor
3.1.8.3. Motor control
•
•
•
Wire feed motor control is based on EMF (electro magnetic force) measurement principle
Wire feed mechanism doesn’t have tachometer, instead motor current is driven to zero every ca. 10ms and the EMF
of the motor is measured before motor current is increased again. This EMF information is then used to regulate
motor speed
The microcontroller measures motor EMF and controls motor current to regulate motor speed
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KEMPACT RA
3.1.8.4. PWM
•
•
PWM (pulse width modulation) circuit is for controlling the inverter
Peak current-mode control is used to directly control primary current which is measured by current transformer T1 l
3.1.9. Fans M001, M002
•
•
•
Machine fans are controlled by the control card A001 microcontroller. If there are two fans (3~models) in the machine they are started in sequence so that second fan is started after 3s delay. When welding starts fans are started
and when welding stops fans are stopped after post run time
In error situation fans are always on
Fans are stopped if arc is not established during first 5s after start
3.1.10. Solenoid valve Y001
•
Solenoid valve is controlled by control card A001 auxiliary voltage + 24 V
3.1.11. Wire feed motor M003
•
•
Wire feed motor control is based on EMF (electro magnetic force) measurement principle. Wire feed mechanism
doesn’t have tachometer, instead motor current is driven to zero every ca. 10ms and the EMF of the motor is measured before motor current is increased again. This EMF information is then used to regulate motor speed. Wire feed
motor speed control is done using the microcontroller. The microcontroller measures motor EMF and controls motor
current to regulate motor speed
There is no special wire inch button. Wire inch is started like normal welding using the gun. When the user pushes
start button wire feed motor and the power source start. Wire feed speed is creep start speed which is slower than
normal wire feed speed. If arc is not established during first 5s the power source is shut down but wire feeding continues with creep start speed for 30s. When the inverter is ON operating voltage for the wire feed motor is taken
from the output of the power source. When the inverter is SHUT DOWN after 5s operating voltage for the wire feed
motor is taken from the auxliary transformer for safety reasons. Because of this current limit of the wire feed motor
has to be lowered. For this reason also torque of the wire feed motor is reduced after 5s
3.1.12. Brights led card P002
•
Controlled by control card A001 auxiliary voltage + 24 V
3.1.13. Panel card P001
•
There is two panel versions R and A (R-version has limited functions). Panel is connected to the control card A001
with 16-wire ribbon cable
o When machine start up panel is showing power source size and SW version
3.1.14. Main transformer T001
•
•
•
In the 181 and 251 machines the main transformer has 19 turn primary winding and center tapped secondary 2 + 2
turns (turns ratio 9.5:1)
In the 253 machine the main transformer has 27 turn primary winding and center tapped secondary 2 + 2 turns
(turns ratio 13.5:1)
In the 323 machine the main transformer has 25 turn primary winding and center tapped secondary 2 + 2 turns
(turns ratio 12.5:1)
3.1.15. Secondary rectifier card Z002
•
•
•
•
Z002 is used to rectify the secondary current. There are 4 60A diodes connected in parallel in both legs of the rectifier
(V1 – V8) in 323 power source. 250 amps machine has 3+3 diodes
Capacitors C1 and C2 and resistors R3 and R4 form a snubber circuit. The snubber circuit reduces the voltage stress of
the diodes caused by the reverse recovery current snap off
Varistors R1 and R2 are for TIG ignition spark protection
Operating voltage for the wire feed motor is rectified to capacitors C3-C5
3.1.16. Secondary choke L001
•
The secondary choke L001 reduces ripple content of the secondary current
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KEMPACT RA
3.1.17. Output RFI filter C001, C002
•
Capacitors C001 and C002 connected to the dowel screws (+ and -) reduce radio frequency interference
3.1.18. Output terminal X004
•
Dix connector X004
3.1.19. Euro connector X005
3.2. Main circuit diagram 181-, 251-models
•
181 and 251 machines have many common technical details with 253 and 323 machines. They have e.g. the same
P001, P002 and Z002 cards. Main differences to 253 and 323 machines are described here
3.2.1. PFC Choke L002
181 and 2511 machines include PFC (Power Factor Correction) circuit. This is implemented using boost topology. The Boost
topology has choke in the input side of the converter. In Kempact 181 and 251 this choke is located on the front side of the
component frame from where it is wired into the component frame
3.2.2. PFC circuit auxiliary transformer T003
PFC circuit auxiliary power is generated using small toroidal transformer located inside the component frame
3.2.3. Main circuit card Z001
3.2.3.1. EMC Filter
•
Capacitors C7, C10, C15, C16 and inductor T6 form an EMC filter. The purpose C17 and R18 is to dampen common
mode transients coming from mains
3.2.3.2. Inrush current limiting
•
PTC resistors R16 and R17 limit inrush current when the power source is switched on. PTCs are bypassed with relays
K1 and K2 after DC link capacitors have been charged. Relays K1 and K2 are controlled by the microcontroller
3.2.3.3. IGBT driver
•
IGBT driver consists of gate transformers T2 and T3 and surrounding components
3.2.3.4. Current transformer T1
•
Current transformer T1 is monitoring primary current and stops power stage operation if current is raising too high
3.2.3.5. Main circuit
•
•
•
•
The main circuit consists of boost type PFC circuit followed by H-bridge type converter.
Both parts of the main circuit are implemented using the same 600V, 75A six pack IGBT module
One leg of the IGBT module is used for the Boost PFC circuit. Lower IGBT is used as the Boost power switch and the
anti-parallel diode of the upper IGBT as the boost diode
The switching frequency of the boost circuit is ca. 15 kHz. The boost circuit raises DC link voltage to ca. 370V. Boost
input current is measured using shunt resistors R58, R59, R65, R66. H – bridge is implemented using the other two
legs of the IGBT module
3.2.3.6. PFC Boost control circuitry
•
PFC control circuitry is located on the primary side. Auxliary transformer T003 supplies operating voltage for the PFC
control circuitry. The output voltage of the T003 is first rectified and then linear regulator is used to regulate auxiliary
voltage to 15V. PFC control IC N1 regulates DC-link voltage to approximately 370V
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3.3. Main circuit diagram 253-, 323-models
3.3.1. Main circuit card Z001
3.3.1.1. EMC filter
•
•
•
Capacitors C5 - C7, C8 - C10, C19 - C21 and inductors T4 and L1 form an EMC filter
First part of the filter is three phase filter which is located before the three phase rectifier V2
Second part is DC filter (L1) which is located after three phase rectifier
3.3.1.2. Inrush current limiting
•
•
•
PTC resistor R1 limits inrush current when the power source is switched on
R1 is bypassed with relays K1 and K2 after DC link capacitors C17, C18 have been charged
Relays K1 and K2 are controlled with the microcontroller
3.3.1.3. IGBT driver
•
IGBT driver consists of gate transformers T2 and T3 and surrounding components
3.3.1.4. Current transformer T1
•
Current transformer T1 is monitoring primary current and stops power stage operation if current is raising too high
3.3.1.5. Main circuit
•
•
•
Main circuit topology is H-bridge. The H-bridge topology requires four power switches which are implemented using
IGBT module V2. The switching frequency of the H – bridge is 20 kHz
253 power source uses 50A module
323 power source uses 75A module
UG1
Approx.. + 570 V
G1
UG1
UG2
G2
G5
UG2
UG3
L1
UT1
UG5
G3
UG3
G4
UL1
UG4
UT1
UG4
UG5
UL1
When IGBT-transistors G1 and G4 conduct, there is a positive voltage U in main transformer T1 primary and when IGBTT1
transistors G2 and G3 conduct there is a negative voltage U in main transformer primary. Power is adjusted by changing the
T1
IGBT timings (PWM).
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KEMPACT RA
4. MAIN CIRCUIT CARD Z001
4.1. Kempact 181, 251
4.1.1. Connectors
Pin
X1
X2
Signal
Mains voltage
Mains voltage
Pin
X4
Signal
Chassis ground connector
Pin
X5
X6
Signal
Auxiliary transformer connection, auxliary transformer is protected with PTC resistors R63 and R64
PFC Auxiliary transformer connection, auxliary transformer is protected with PTC resistors R63 and R64
Kemppi Oy
Description
Main voltage connector
Mains voltage connector
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KEMPACT RA
Pin
X7
X8
X17
X19
Signal
Main transformer connections
Main transformer connections
Main transformer connections
Main transformer connections
Pin
X9
Signal
PFC auxiliary voltage connector
Pin
X10:1
X10:2
X10:3
X10:4
X10:5
X10:6
X10:7
X10:8
X10:9
X10:10
X10:11
X10:12
Signal
Inrush Relay
OV Opto P
Primary current transformer
Inrush Relay
OV Opto N
Primary current transformer
IGBT Drive B
PFC ON/OFF P
IGBT Drive A
PFC ON/OFF N
-
Pin
X11
X12
X14
X15
Signal
PFC choke connections
PFC choke connections
PFC choke connections
PFC choke connections
Pin
X13
X16
Signal
DC-link voltage
DC-link voltage
Kemppi Oy
Description
Other end of the inrush relay coil
Over voltage optocoupler other end
Primary current transformer other end
Other end of the inrush relay coil
Over voltage optocoupler other end
Primary current transformer other end
Other end of the IGBT driver transformer primary
PFC on/off opto coupler diode positive end
Other end of the IGBT driver transformer primary
PFC on/off opto coupler diode negative end
-
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KEMPACT RA
4.2. Kempact 253, 323
4.2.1. Connectors
Pin
X1
X2
X3
Signal
Mains voltage
Mains voltage
Mains voltage
Pin
X4
Signal
Chassis ground connection
Pin
X5
Signal
Auxiliary transformer connection, auxliary transformer is protected with PTC resistors R16 and R17
Pin
X7
X8
Signal
Main transformer connections (253 machine use two flat connectors, 323 use four)
Main transformer connections (253 machine use two flat connectors, 323 use four)
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Description
Main voltage connector
Mains voltage connector
Mains voltage connector
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KEMPACT RA
X13
X14
Main transformer connections (253 machine use two flat connectors, 323 use four)
Main transformer connections (253 machine use two flat connectors, 323 use four)
Pin
X9:1
X9:2
X9:3
X9:4
X9:5
X9:6
Signal
IGBT Drive B
OV Opto P
Inrush Relay
IGBT Drive A
OV Opto N
Inrush Relay
Pin
X10
Signal
Primary current transformer connector
Pin
X11
X12
Signal
DC-link voltage
DC-link voltage
Kemppi Oy
Description
Other end of the IGBT driver transformer primary
Over voltage optocoupler other end
Other end of the inrush relay coil
Other end of the IGBT driver transformer primary
Over voltage optocoupler other end
Other end of the inrush relay coil
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KEMPACT RA
5. SECONDARY RECTIFIER CARD Z002
5.1. Connectors
Pin
X1
X2
X3
X4
X5
X6
Signal
Main transformer secondary
Main transformer secondary
Z002 card connection to secondary profile
Z002 card connection to secondary profile
Rectified +24V
Polarity connector (-)
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KEMPACT RA
6. CONTROL CARD A001
6.1. Leds
Led
H1
H2
H4
H5
H6
Description
Auxiliary voltage + 15V
Status of IGBT driver, when this LED is lit IGBT driver is active
RDI debug purposes
Motor control input voltage
+24V voltage
6.2. Connectors
Pin
X2:1
X2:2
X2:3
X2:4
X2:5
X2:6
Signal
+ 50 V
GND
+ 24 V
Motor (+)
Motor (-)
GND
Kemppi Oy
Description
Secondary voltage from secondary card
Ground
+24V from the auxiliary transformer
Wire feed motor (+)
Wire feed motor (-)
Ground
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KEMPACT RA
Pin
X3:1
X3:2
X3:3
X3:4
X3:5
X3:6
X3:7
X3:8
X3:9
X3:10
X3:11
X3:12
Signal
Vout
CT (B)
CT (A)
GND
GND
J3
GND
GND
GND
J2
J1
J0
Description
Output voltage measurement from the dowel screw (+)
Current transformer secondary (B).
Current transformer secondary (A)
Ground
Ground
Primary current limit jumper.
Ground
Ground
Ground
Machine type jumper J2
Machine type jumper J1
Machine type jumper J0
Pin
X4:1
X4:2
X4:3
X4:4
X4:5
X4:6
X4:7
X4:8
X4:9
X4:10
X4:11
X4:12
Signal
Fan1 (-)
Fan2 (-)
Gas Valve
Fan1 (+)
Fan2 (+)
Gas Valve
Brights led (+)
PFC control (+)
Inrush relay
Brights led (-)
PFC control (-)
Inrush relay
Description
Fan 1 (-)
Fan 2 (-)
Gas valve
Fan 1 (+)
Fan 2 (+)
Gas valve
Brights led card (P002) (+) connection.
PFC ON/OFF control (+) connection
Inrush relay connection
Brights led card (P002) (-) connection.
PFC ON/OFF control (-) connection
Inrush relay connection
Pin
X5:1
X5:2
Signal
PRIM_OV_P
PRIM_OV_N
Description
Primary over voltage alarm (+)
Primary over voltage alarm (-)
Pin
X6:1
X6:2
X6:3
X6:4
X6:5
X6:6
Signal
PWM drive B
PTC gnd
Start B
PWM drive A
PTC
Start A
Description
IGBT driver transformer other end
PTC ground connection
Gun switch connection
IGBT driver transformer other end
PTC connection
Gun switch connection
Pin
X7
Signal
Connections to chassis ground
Pin
X8
Signal
Used in development purposes, do not connect anything here
Pin
X10
Signal
Maintenance use
Pin
X16
Signal
Panel card P001 connection
Pin
X19
Signal
Not in use
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KEMPACT RA
7. PANEL CARD P001
•
Panel card is connected to the control card A001 connector with 16-wire ribbon cable
7.1. Connectors
Pin
X1:1
X1:2
X1:3
X1:4
X1:5
X1:6
X1:7
X1:8
X1:9
X1:10
X1:11
X1:12
X1:13
X1:14
X1:15
X1:16
Signal
+24V
SDA
+5V
GND
SCL
GND
Pot_1_A
Pot_1_B
GND
Pot_2_A
Pot_2_B
GND
Pot_3_A
Pot_3_B
+5V
+24V
Kemppi Oy
Description
+24V supply voltage for the LCD backlight
I2C bus data
+5V supply voltage
Ground
I2C clock
Ground
Pulse potentiometer 1 channel A
Pulse potentiometer 1 channel B
Ground
Pulse potentiometer 2 channel A
Pulse potentiometer 2 channel B
Ground
Pulse potentiometer 3 channel A
Pulse potentiometer 3 channel B
+5V supply voltage
+24V supply voltage for the LCD backlight
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KEMPACT RA
8. OPERATIONAL MEASURINGS AND TESTS
NOTE !
Main supply voltage must not be connected when making measuring operations. The component frame has to be uninstalled
so that main components conditions can be measured.
8.1. Kempact 181, 251
V24,25
V1
8.1.1 Primary rectifier V24, 25
•
•
•
Primary side primary rectifier diodes can be measured one at the time
Diodes must be measured both forward bias and reverse bias condition to make sure they are fine
Check the diodes using the multimeter diode function to measure their threshold voltage 0,3…0,6 V
Measurings :
1) Positive test pole to rectifier pole (1, red), negative test pole to rectifiers poles (1, black) one at time
Result: 0,3…0,6diodes Ok
2) Negative test pole to rectifier pole (2, black), positive test pole to rectifier poles (2, red) one at the time
Result: no valuediodes Ok
3) Negative test pole to rectifier pole (3, black), positive test pole rectifier poles (2, red)one at the time
Result: 0,3…0,6diodes Ok
4) Positive pole to rectifier pole (4, red), negative test pole to rectifier poles (1, black) one at the time
Result: no valuediodes Ok
NOTE !
The measurement procedure is same for V24 and V25 rectifiers.
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8.1.2. IGBT module V1
•
•
IGBT module can be tested by multimeter if using the diode tester function. Module holds six diodes and in many
cases they may be defective if IGBT is damaged
When measuring IGBT unit diodes you must disconnect other end of main transformer (X7)
o After measuring connect other end (X7) back
Measurings:
1) Negative test pole (1, black) to connector X16, positive test pole (1, red) to connectors X7, X8 and X14 one at time
Result: 0,3…0,6diodes Ok
2) Positive test pole (2, red) to connector X13, negative test pole (2, black) to connectors and X7, X8 and X14 one at time
Result: 0,3…0,6diodes Ok
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KEMPACT RA
8.2. Kempact 253, 323
V1
8.2.1. Primary rectifier, V1
•
•
•
Primary side primary rectifier diodes can be measured one at the time
Diodes must be measured both forward bias and reverse bias condition to make sure they are fine
Check the diodes using the multimeter diode function to measure their threshold voltage 0,3…0,6 V
Measurings:
1) Positive test pole to DC-link (-), negative test pole to L1, L2, L3 (one at the time)
Result: 0,3…0,6diodes Ok
2) Positive test pole to DC-link (+), negative test pole L1, L2, L3 (one at the time)
Result: no valuediodes Ok
3) Negative test pole to DC-link (+), positive test pole L1, L2, L3 (one at the time)
Result: 0,3…0,6diodes Ok
4) Negative test pole to DC-link (-), positive test pole L1, L2, L3 (one at the time)
Result: no valuediodes Ok
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V2
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KEMPACT RA
8.2.2. IGBT module, V2
•
•
IGBT module can be tested by multimeter if using the diode tester function. Module holds four diodes and in many
cases they may be defective if IGBT is damaged
When measuring IGBT unit diodes you must disconnect other end of main transformer (X7)
o After measuring connect other end (X7) back
Measurings:
1) Positive test pole to connector X7 and X8 one at time, negative test pole to DC link (+)
Result: 0,3…0,6diodes Ok
2) Positive test pole to DC-link (-), negative test pole to X7 and X8 one at time
Result: 0,3…0,6diodes Ok
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KEMPACT RA
8.3. Secondary rectifier card, Z002
•
Use a digital multimeter to test the secondary unit diodes. Diodes are in groups, so you can measure them in two
separate groups
Measurings:
1) Positive test pole to main transformer secondary (secondary card connectors X1 and X2 one at time), negative test pole to
secondary profile
Result: 0,3…0,6diodes Ok
2) Positive test pole to secondary profile, negative test pole to main transformer secondary (secondary card connectors X1 and
X2 one at time)
Result: no valuediodes Ok
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KEMPACT RA
3) Snubber resistors R3 and R4
Result: value ~10 Ω
8.4. PTC’s, overheat protection
•
There are two PTC’s in machine
o Main transformer Rt101 140 °C, value ~94 Ω in room temperature (connector 12, blue/white)
o Secondary profile Rg201 90 °C, value ~63 Ω in room temperature (connector 11, green/green)
o In over temperature situation PTC goes to high-resistance mode (>10kΩ)
o A broken PTC has usually hundreds of kilo ohms resistance or no value at all
8.5. Control card A001
•
Control card voltages can be quickly verified with LEDs on the control card A001
9. MAIN COMPONENTS INSTALLATION
•
•
Heat sink paste should be spread on to the modules in an even layer by using clean fingers. Then the card should be
immediately mounted onto the heat sink, this minimizes the possibility of any contamination (dirt etc.) getting
between the components.
Use torque screwdriver when tightening any power components onto the heat sink. See following sections for
tightening torques.
9.1. Main circuit card Z001
•
•
•
•
Primary rectifier V1 to heatsink 2 NM
IGBT unit to heatsink
o First step 2 NM and wait a couple minutes
o Second step 3 NM
Main circuit card Z001 to profile holder 0,7 NM
Primary unit to component frame 2 NM
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KEMPACT RA
•
Z001 grounding cable to component frame 5 NM
9.2. Secondary rectifier card Z002
•
•
•
•
•
Secondary diodes to heatsink 1,2 NM
Resistors to heatsink 0,7 NM
Secondary card Z002 to heatsink 2,5 NM
Secondary profile to component frame 2 NM
Main transformer secondary leads 5 NM
9.3. Other components
•
•
•
•
•
•
Main transformer T001 to component frame 2 NM
Main transformer T001 secondary leads to secondary card Z002:X1,X2 5 NM
Rectifier G003 to component frame 5 NM
Auxiliary transformer T002 to component frame 5 NM
Secondary choke L001 to component frame 2 NM
Secondary choke L001 other lead to secondary profile 5 NM and other lead to polarity screw 5 NM
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KEMPACT RA
10. ERROR CODES
•
•
•
In error situation welding is stopped and an error code is displayed on the panel
The user can clear the error by pressing any of the panel buttons and if certain conditions are fulfilled
If there are multiple errors at the same time only one can be displayed at a time. After user has cleared one error
next is displayed and so on until there is no more errors
Error code
2
Error
Mains under voltage
3
Mains over voltage
4
Wire feed motor over current
5
Wire feed motor control not
calibrated
-calibration parameters have been corrupted
-faulty control card A001
6
Power source control not
calibrated
-power source control calibration parameters are not in predefined limits
-calibration parameters have been corrupted
-faulty control card A001
-start up machine (on/off)
- change control card A001
7
User interface memory error
-start up machine (on/off)
-check welding parameters
8
Memory channel 1 error
-EEPROM memory error
-used wrong welding parameters (improper
value)
-memory channel data is invalid / corrupted
9
Memory channel 2 error
-memory channel data is invalid / corrupted
10
Memory channel 3 error
-memory channel data is invalid / corrupted
11
Memory channel 4 error
-memory channel data is invalid / corrupted
12
Continuous short circuit in the output of the power source
-there is continuous (over 2s.) short circuit in
the output of the power source.
100
Microcontroller error
101
Microcontroller error
102
Microcontroller error
103
Microcontroller error
110
Panel communication error
111
Panel communication error
112
Panel communication error
-microcontroller reset. Possible reason: tig
ignition spark.
-microcontroller reset. Possible reason:
flash memory has been corrupted
-microcontroller reset. Possible reason: electromagnetic disturbance
-microcontroller reset. Possible reason: electromagnetic disturbance
-communication error between panel card
P001 and control card A001
-communication error between panel card
P001 and control card A001
-communication error between panel card
P001 and control card A001
Kemppi Oy
Reason
-mains voltage is under lower limit.
-181 model: 195 V
-251 model: 204 V
-253, 323 models: 340V
-mains voltage is over high limit:
-181 model: 265 V
-251 model: 276 V
-253, 323 models: 460V
-wire feed motor current (6 amps longer
than 60 s) is too high
-motor is jammed longer than 60 s
Action / remedy
-check mains voltage
-mains over voltage error can be
cleared after mains voltage has risen
over low limit.
-check mains voltage
-mains over voltage error can be
cleared after mains voltage has fallen
under high limit
-this error can be cleared after welding has stopped due to this error
-check wire feeding motor and mechanism
-start up machine (on/off)
-change control card A001
-start up machine (on/off)
-check welding parameters
-start up machine (on/off)
-check welding parameters
-start up machine (on/off)
-check welding parameters
-start up machine (on/off)
-check welding parameters
-remove short circuit from machine
output (contact tip is connected /
short circuited in welding piece)
-start up machine (on/off)
-start up machine (on/off)
-start up machine (on/off)
-start up machine (on/off)
-check flat cable/connectors between
panel- and control card
-check flat cable/connectors between
panel- and control card
-check flat cable/connectors between
panel- and control card