Hanshen TIG200P, Operation Manual

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15
Troubles Possible causes Eliminate methods
No argon flows out after
pressing the torch switch Switch of argon bottle or
flowmeter doesn’t open up Open up these two switches
Gas tube is jammed or broken Check tube
Gas valve is broken Change valve
Can’t close relay J3(4123) in
board AP1 Change relay J3(4123) or board
AP1
Can’t adjust welding current Potentiometer for adjusting
current is broken or wire is
disconnected
Change potentiometer or
connect wire
B1 in board AP1 is broken Change B1 or board AP1
Rated output current is
reduced Input voltage is too low Ensure the normal voltage
Input wire is too thin Change power supply wire
Capability of power supply is not
enough Ensure the capability of power
supply more than the maximal
power of machine in normal
work condition
Function “pulsed TIG
welding” does not exist One of the base current, summit
current or pulse frequency
potentiometers is broken Check and change the broken
potentiometers
M1(4011),N1(555),B1(339) in
board AP1 is broken Change M1(4011),N1(555),
B1(339) or board AP1
Inverter tube (IGBT) is
broken Work in over loading condition
for a long time Change IGBT
Work in over voltage or under
voltage condition for a long time Change IGBT and ensure the
normal input voltage
Output commutation diode
is broken Work in great current condition
for a long time or environment
temperature is too high Change broken diode and
improve work condition
Frequent burnout of diode is
caused by the large discharging
space of arc-igniting unit. Adjust the discharging space to
1.0-1.2mm