17
WS 300/ WS 400/ WSM 300/ WSM 400
Fault Symptoms
Rectification
1. While this
welding
equipment is
operated, the
built-in fan is
not
functioning. No
display of
digital meter,
no welding
output.
1. Possible failure of connection of power supply, check and
reconnect if necessary.
2. If power supply is available of input, possible damage of
four thermal resistance. Check and replace them if
necessary.
3. Possible malfunction of power PCB.
3.1 Possible damage of Rectifier Bridge.
3.2 Power PCB is damaged.
3.3 Check connection of input.
4. Possible failure of secondary power supply. Please
contact dealer or supplier for further advice.
2. While this
welding
equipment is
operated, the
built-in fan
functions, fault
indicator is off,
no HF
electricity
releasing, arc
starting
unavailable.
1. Check all the connections inside the machine.
2. Something wrong with the control circuit, find out the
reason and contact the manufacture.
3. The control cable on the torch is broken.
3. While this
welding
equipment is
operated, fault
indicator is off,
HF electricity
releasing is
available, and
welding current
output is
unavailable.
1. Possible disconnection of welding torch cable.
2. Possible disconnection of earth cable, or unavailability of
connection of the earth cable and work piece.
3. The connection between positive output terminal or the
gas or electricity output terminal and this welding
equipment is possibly unavailable. Reconnect them if
necessary.
4. While this
welding
equipment is
operated, the
fault indicator
is off, no
electricity
releasing, and
the arc starting
available.
1. The cable connection between the transformer of arc
starting and power PCB is possibly unavailable. Check
and reconnect it.
2. Possible oxidization of electricity releasing parts occurs.
Or the distance is larger than the maximum distance
available. Remove the oxidization of the electricity
releasing parts and adjust the distance of the electricity
releasing parts to range of 1mm.
3. Possible damage to MMA/TIG switch. Replace them if
necessary.
4. Components of HF arc starting circuit are possibly
damaged. Check and replace them if necessary.
