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8.TROUBLES EXAMINATION & REPAIR
The overhauler can examine and repair the machine according to table 8 after examining it on the
base of list 7. Please contact the seller or the producer if the malfunctions still have not been
eliminated.
ATTENTION:
1.
Because inner electrocircuit can produce high voltage which can hurt people, so before
maintenance and overhaul must turn off the switch in switchboard. Inner electrocircuit only can
be overhauled after 5 min. after power supply has been disconnected from welding machine.
2.
The machine has been accurately adjusted before leaving from factory, so strictly prohibit any
modifying and change.
3.
Check whether the circuitries are in correct connection. In order to avoid troubles do not
energize hard and change its position at will while connecting.
List7: overhauling items
Trouble
phenomena
Trouble
causes
No arc exists
Torch switch is useless
Power switch is broken
The cable to switch is disconnected
The cable to workpiece is disconnected
The cable of torch is broken
Starting arc is not good or jarless
Connecting tie-in is loose
Argon gas is not pure
The tungsten electrode is no good fixed or its
quality is no good
Surface of welding line is no good
Dunghill or grease exists on the surface of
workpiece
Argon gas is not pure
Flux of argon gas is not enough
Dunghill exists on the surface of tungsten
electrode
Post flow gas time is too short
Tungsten electrode wastes hard
Current is too great or tungsten electrode is too
thin
Argon gas is not pure
Summary of Contents for TIG200P
Page 17: ...16 9 CIRCUIT DIAGRAM...
