Page 18
- 12 -
10
、
Precautions before repairs
Warning
A haphazard experiment and imprudent repair may lead to expansion of fault area,
making formal repair more difficult.
The exposed part of the welder in energization carries high voltage
that may lead to hazards and any direct or indirect touch with it will result in electric shock accident. In serious case
death may occur
If in the warranty period the user carries out an erroneous examination and repair of any fault in
the welding and cutting power without permission, the free maintenance warranty offered by the
supplier will be invalidated.
11
、
Precautions or preventive measures
1
、
Environment
1
）
Welding operation should be carried out in a relatively dry environment with air humidity usually
less than 90%.
2
）
Ambient temperature should be kept between -10
C ~40
C.
3
）
Welding in the sun or rain should be avoided and water or rainwater should never be seeped into
the welder interior.
4
）
Welding in the dusty area or under a corrosive gas environment should be avoided.
5
）
Gas protection welding operation in an environment with strong air flow should be avoided.
2
、
Essentials for safety
In this welder over-voltage, over-current and overheat protection circuits have been installed
beforehand. When the grid voltage, output current and machine temperature surpass the set
standards, the machine will stop automatically. But excessive use (for example, when the voltage
is too high) can still lead to the breakdown of the welder. So you have to pay attention to the
following items:
1
）
Good ventilation
！
This machine is a small type welder. In operation a high working current flows in and natural
ventilation is unable to meet the welder’s requirement for cooling. So a fan is fitted to effectively
cool the welder to keep it work smoothly.
Operators should make sure that the vent is not covered or plugged, the distance of the welder
from its surrounding objects is not less than 0.3 m and good ventilation is kept all the time. All
