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General| Brand | Kemppi |
|---|---|
| Model | miniarc 140 |
| Category | Power Supply |
| Language | English |
Explains the 'dual-Forward'-inverter operating principle and PWM control.
Illustrates the main electrical circuit of the power source.
General safety advice and initial visual checks before troubleshooting.
Provides a table of disturbances, possible causes, and remedies.
Addresses issues where the power source does not start, OCV is 0V, or overheat LED blinks.
Covers scenarios where the power source starts but shuts down when loaded or cannot be loaded.
Diagnoses problems with the welding current not being adjustable via the potentiometer.
Schematic of the main circuit for models before serial number 1085088/M.
Schematic of the main circuit for models from serial number 1085088/M onwards.
Procedure for measuring the primary voltage of the main transformer T001.
Details for measuring the primary voltage of the main transformer T001 on the control card.
Details for measuring the secondary voltage of the main transformer T001 on the control card.
Details for measuring the voltage after the secondary rectifier on the control card.
Details for measuring the IGBT gate pulse on the control card.
Examines IGBT gate pulse behavior under open circuit conditions.
Identifies connectors on the control card A001 and their signals.
Visual overview of the control card A001's physical arrangement.
Identifies key components on the Control Card A001 with their part numbers.
Procedure for testing IGBT transistors using an IGBT-tester.
Procedure for testing the secondary diodes, including precautions.
Details a modification involving a minus pole insulator to prevent short circuits.
Covers IGBT gate resistor modifications and DC-link charging relay checks.
Details replacement of control and filter cards affecting OCV.
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