Longevity STICKWELD 140 User Manual
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P a g e
LONGEVITY® Global, Inc. thanks you for your purchase and the opportunity to be able to serve you. If,
after reviewing this manual, you have any problems in setting up or operating your machine, contact us
Faults symptom
Solutions
Power indicator is not lit,
fan is not working, no
welding output.
A. Make sure power switch is connected properly.
B. Make sure your power plug is connector to the proper voltage.
Power indicator is lit, fan
doesn
’t work, no welding
output.
A. Check the input power to make sure you are connected to the proper
power level
– either 110v or 220v
B. Dirty or Unstable power is detected and the machine has entered a fail
safe mode. Unplug and restart the machines after 5 minutes once the
voltage is stable.
C. Restart the machine but unplugging the power cable and turning the
machine on in 5 minutes
D. Cables in the power plug or the machine power switch are loose or not
connected firmly.
ARC Welding Current
Knobs is Erratic
A. Amp Adjustment Knobs needs replacement along with potentiometer.
B. Terminal of output has a broken circuit or poor connection.
Fan is working and
abnormal indicator is not
lit, no welding output.
A. Check if components are connected properly.
B. Check if the output terminals are connected properly.
C. If there are questions about the mother board, contact the authorized repair
center.
Fan is working and
abnormal indicator is lit,
no welding output.
A. Overload current protection may start, please turn off machine first, then
restart it after abnormal indicator is off.
B. Overheat protection may start, it will become normal in 2-3min.
C. Inverter circuit may go wrong. Please disconnect the power supply plug of
the main transformer on MOS board (near fan VH-07), then restart the
machine.
1） If abnormal indicator is still lit, that means some fieldistors on MOS
board are damaged. check and replace them.
2） If abnormal indicator is off:
a. Maybe transformer of middle board is damaged, measure primary
inductance value and Q value of main transformer by inductance
bridge.
b. Primary value is parallel circuit, L=1.2-2.0mH, Q>40 If inductance
value and Q value is low, replace it.
c. Maybe some of secondary rectifier tube of transformer is broken,
check and replace rectifier tube.
D. Maybe feedback circuit is in fault.
Power supply
(1phase ~ 220V)
Electrode holder
Earth clamp