Kemppi MASTERTIG AC/DC 2500W, Service Manual

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TECHNICAL SERVICE MANUAL FOR MASTERTIG ACDC
INTRODUCTION / GENERAL MAINTENANCE OF MASTERTIG ACDC
Maintenance of the Mastertig ACDC machine would normally involve a general
check of the electrical connections of the machine, cleaning of the unit’s
interior with soft brush and vacuum cleaner and a physical check of parts such
as switches, connectors, potentiometers and fuses.
NOTE! If you use compressed air for cleaning, there is a risk that dirt may be
driven into pcb connectors and other components.
Maintenance of the power source and tig torch will normally consist; checking
of electric connections, general cleaning and change of consumable parts like:
gas nozzle, torch body, electrode and electrode shield, tightening bush and
housing for tighten bush and all isolating of torch body. Check also that flow of
the shielding gas is free and even. Due to high temperature the welding end of
TIG torch requires maintenance most. Check also the condition of the welding
and connection cables daily! Check also mains connection cables! Do not use
damaged cables!
The number of systems in operation and the importance of minimize not
running time will determine to what extend consumable- and spare parts will be
stocked. The amount of use and an unusual working enviroment have a
special effect on the need of maintenance.
WARNING !
D
ISCONNECT THE POWER SOURCE FROM MAINS SUPPLY VOLTAGE BEFORE REMOVING
SIDE PANELS
. D
ANGEROUS
DC
VOLTAGE STILL EXISTS EVEN AFTER REMOVAL OF
MAINS SUPPLY
. W
AIT AT LEAST TWO MINUTES
(
RECOMMENDED DISCHARGE TIME FOR
CAPACITORS
)
BEFORE REMOVING THE CASING PLATES
.
Troubleshooting
Start troubleshooting by looking for signs of over heating, fractures and
damage to internal components and power semiconductors. Visual inspection
before troubleshooting may help to isolate the defective circuit.