- 12 -
BEFORE CHECKING
WARNING
Blind experiment and careless repair may lead to more problem of the machine that will make formal
check and repair more difficult. When the machine is electrified, the naked parts contain life-threatening voltage.
Any direct and indirect touch will cause electric shock, and severe electric shock will lead to death.
TIG 200-DC CHECK FAULT
Faults
Resolvable Methods
Power indicator is not
lit ,fan does not work
and no welding output
1. Power switch is out of work .
2. Check if electrify wire net (which is connected to input cable )is in work. .
3. Check if input cable is out of circuit .
.Power indicator is lit ,fan
does not work or revolve
several circles ,no welding
output
1.
Maybe connect wrong to 380V power cause machine is in protection
circuit ,connect to 240V power and operate machine again .
2.
240v power is not stable,(input cable is too slender)or input cable is
connected to electrify wire net cause machine is in protection
circuit .Add the section of cable and tighten input connector
firmly .Close machine 2-3 minutes then open it again.
3.
Cable is loosed from switch to power panel ,tighten them again .
4.
Open and close power switch constantly in short time cause machine is
in protection circuit Close machine 2-3 minutes then open it again .
5. Main circuit 24V relay of power panel is not close or has
damaged .Check 24V power source and relay .If relay has damaged
replace it with same model.
Fan is working ,
Indicator is not lit and
sound of HF arc-striking
can not be heard ,wiping
welding can not strike arc.
1. Positive and negative electrodes of VH-07 insert component voltage
should be about DC308v from power panel to MOS board .
2. There is a green indicator in auxiliary power of MOS board ,if it is not
on ,auxiliary power is out of work .Check fault spot and connect with
seller .
3. Check if connectors is poor contact .
4. Check control circuit and find out reasons or connect with seller.
5. Check if control cable of torch is broken.
Abnormal indicator is not
on,sound
of
HF arc-striking
can be heard ,but there is
no welding output .
1.
Check if torch cable is broken .
2.
Check if grounding cable is broken or not connected to welding piece .
3. Output terminal of positive electrode or torch electrify is loosed from
inter-machine .
Abnormal indicator is not
lit,sound of HF arc-striking
can not be heard ,wiping
welding can strike arc .
1.
Primary cable of arc-striking transformer is not connected to power
panel firmly ,tighten it again.
2.
Arc-striking tip is oxidized or too far ,give a good polish to it or change
it is about 1 mm between arc-striking tip .
