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13. Trouble shooting
Faults
Resolvable Methods
1. 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 .
2
.
ower 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 220V power and operate machine again .
2. 220V 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 24Vpower source and relay .If relay has damaged
replace it with same model.
3. 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 DC310V from power panel to IGBT board .
(1) If circuit is broken and silicon bridge is poor contact .
(2) If some of four high electrolytic(about 470UF/400V) of power
panel capacitor is leaking .
2. There is a green indicator in auxiliary power of IGBT 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.
4. 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 .
5
.
bnormal 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 .
3. Switch(sticking/argon-arc welding) is damaged ,replace it .
4. Some of HF arc-striking circuit components is damage ,find out and
replace it .
6
.
bnormal indicator is
lit but there is no
welding output .
1. Maybe it is overheated protection ,please close machine first ,then
open the machine again after abnormal indicator is out .
2. Maybe it is overheated protection ,wait for 2-3 minutes (argon-arc
welding does not has overheated protection function .)
3. Maybe inverter circuit is in fault ,please pull up the supply power plug
of main transformer which is on IGBT board (VH-07 insert which is
near the fan)then open the machine again.
(1) If abnormal indicator is still lit ,close machine and pull up supply
power plug of HF arc-striking power source (which is near the