2 Key points of safety
This welding machine is furnished with overvoltage, overcurrent and overheating
protection circuit. When electric grid voltage, output current and interior temperature
exceed the setting standard, welding machine will stop automatically ； but
overuse(such as overvoltage) may damage welding machine, therefore, you should
pay attention to the following points
：
1
）
Ensure excellent ventilation!
This welding machine is of mini type welding machine. There is great working
current passing through it when working, so natural ventilation could not satisfy the
cooling requirement of welding machine, therefore, a built-in fan is provided to cool
the welding machine effectively to make it work steadily.
The operator should ensure the ventilation not be covered or blocked, the distance
from the welding machine to objects around it should not be less than 0.3m. User
should always keep excellent ventilation which is vital to perfect working and long
service life of welding machine.
2) Overload is forbidden!
The operator should observe and check the maximal allowable load current from
time to time(relative to the selected duty cycle)to ensure the welding current not
exceed the maximal allowable load current.
Current overload may shorten the service life of welding machine remarkably even
cause burnt of welding machine.
Duty cycle means: the working hour percentage of equipment in 10 minutes work
cycle, when welding current decreases, the duty cycle will increase, when welding
current increases, it will decrease.
When the welding machine exceeds the standard duty cycle in work, it may enter
into protection mode and pause, which indicates that welding machine has exceeded
standard duty cycle and the excessive heat energy will activate the temperature detect
switch to make welding machine stop, at the same time, the Yellow indicator on front
panel will light. Under this circumstances, power source plug need not to be unplugged
so that the cooling fan can work continuously to cool the welding machine. When the
Yellow indicator extinguishes, it indicates that the temperature has dropped to standard
range and the welding can restart.
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