Kemppi Kempact 253R Service Manual page 3

4.1. Kempact 181, 251 ........................................................................................................................................................................ 19
4.1.1. Connectors ........................................................................................................................................................................... 19
4.2. Kempact 253, 323 ........................................................................................................................................................................ 21
4.2.1. Connectors ........................................................................................................................................................................... 21
4.3. Kempact 253MV, 323MV ............................................................................................................................................................. 23
4.3.1. Connectors ........................................................................................................................................................................... 23
5. SECONDARY RECTIFIER CARD Z002 ...................................................................................................................................................... 25
5.1. Connectors ................................................................................................................................................................................... 25
6. CONTROL CARD A001 ........................................................................................................................................................................... 26
6.1. Leds .............................................................................................................................................................................................. 26
6.2. Connectors ................................................................................................................................................................................... 26
7. PANEL CARD P001 ................................................................................................................................................................................ 28
7.1. Connectors ................................................................................................................................................................................... 28
8. OPERATIONAL MEASURINGS AND TESTS ............................................................................................................................................. 29
8.1. Kempact 181, 251 ........................................................................................................................................................................ 29
8.1.1 Primary rectifier V24, 25 ....................................................................................................................................................... 29
8.1.2. IGBT module V1 ................................................................................................................................................................... 30
8.2. Kempact 253, 323 ........................................................................................................................................................................ 31
8.2.1. Primary rectifier, V1 ............................................................................................................................................................. 31
8.2.2. IGBT module, V2 ................................................................................................................................................................. 32
8.3. Kempact 253MV, 323MV ............................................................................................................................................................. 33
............................................................................................................................................................................................................ 33
8.3.1. Primary rectifier, V31 ........................................................................................................................................................... 33
8.3.2. IGBT module, V1 ................................................................................................................................................................. 34
8.5. PTC's, overheat protection ........................................................................................................................................................... 36
8.6. Control card A001 ........................................................................................................................................................................ 36
9. MAIN COMPONENTS INSTALLATION .................................................................................................................................................... 36
9.1. Main circuit card Z001 .................................................................................................................................................................. 36
9.2. Secondary rectifier card Z002 ...................................................................................................................................................... 37
9.3. Other components ....................................................................................................................................................................... 37
10. ERROR CODES ..................................................................................................................................................................................... 38
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. Kem-
pact 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_V_1.2
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