7
CHECK FAULT
Faults
Resolvable Methods
1.Switch indicator is on, fan is
not working and control knob
is out of work.
1. Over voltage protection is
working. Close machine then open it
again after several minutes.
2.Switch indicator is lit and fan
is working. However, press
control knob of torch, there is
no HF arc-striking sound and
electromagnetic valve is not
working.
1. Check if torch is open cicuit.
2. Check if control knob of torch is
damaged.
3. Part of assistant power of top
board is damaged and there is no
DC 24v output.
3.Switch indicator is lit and fan
is working. However, press
control knob of torch, there is
no HF arc-striking sound and
inter red diode is lit.
1. Check if MOSFET of top board is
damaged (driver mould is
damaged).
2 .Rising transformer of bottom
board is damaged.
3. Control mould is damaged.
4.Switch indicator is lit and fan
and electromagnetic valve are
working. However, there is no
sound of HF arc-striking and
inter red diode is not lit.
There is some trouble in part of arc-
striking, such as:
1. It is too far between discharge tip
or there is adhesion in discharge tip.
2. Primary coil of arc-striking
transformer is damaged or poor
contact.
3. Check if four times voltage
rectifier diode is stricken.
4. Check if HF electric capacity
102/10KV is leaking.
Relay is damaged.
5.Other of machine is normal,
but arc is not be stricken when
it is be operating.
1.Input voltage is too low.
2.Pressure of air compressor is too
high or too low.
