Maintenance and troubleshooting
6
The following operation requires su
ffi
cient professional
knowledge on electric aspects and comprehensive
safety knowledge. Make sure the input cable of the
machine is disconnected from the electricity supply and
wait for 5 minutes before removing the machine covers.
In order to guarantee that the arc welding machine works
e
ffi
ciently and in safety, it must be maintained regularly.
Operators should understand the maintenance methods and
means of arc welding machine operation. This guide should
enable customers to carry on simple examination and
safeguarding by oneself, try to reduce the fault rate and
repair times of the arc welding machine, so as to lengthen
service life of arc welding machine
Troubleshooting
Before arc cutting machines are dispatched from the factory,
they have already been checked thoroughly. The machine
should not be tampered with or altered.
Maintenance must be carried out carefully. If any wire
becomes loose or is misplaced, it maybe potential danger to
user!
Only professional maintenance personnel should repair the
machine!
Ensure the power is disconnected before working on the
machine. Always wait 5 minutes after power switch o
ff
before opening the case.
12
Period
Maintenance item
Daily
examination
Carry out a full visual inspection. Check
for any damage to the machine, leads,
cables and connections. Replace where
necessary.
Switch on the machine and check for any
warning Led’s and general operation
Monthly
examination
Using the dry compressed air to clean the
inside of arc welding machine. Especially
check for build up of dust / debris on
intake grills, main voltage transformer,
inductance, IGBT modules, the fast
recover diode and PCB, etc. Take care
when blowing electronic components and
do not dislodge any wiring connections
Check the security of output connections
and plugs. Replace if signs of overheating.
Yearly
examination
Carry out an annual service. Check earth
continuity and insulation resistance of the
machine at the relevant points.
PLEASE NOTE THIS WORK SHOULD
BE CARRIED OUT BY A TRAINED
COMPETENT PERSON.
Malfunction
Cause and solution
Turn on the machine, the
power indicator illuminates,
the control PCB keys do not
function, and there is no
response when pushing the
torch trigger.
The machine crashes: Shut
down the machine, and
restart it.
Turn on the machine, the
power indicator illuminates,
the control PCB keys work
normally, but there is no
response when pushing the
torch trigger.
1)
The LED1 on the main
board is on: The control
PCB is damaged.
2)
The LED1 on the main
board is o
ff
: Check the torch
trigger and torch trigger
wire.
Turn on the machine, the
power indicator illuminates,
and the fan works. When
pushing the torch trigger, the
solenoid valve functions, but
there is no HF discharge.
The arc ignition part fails:
1)
The inner electrode
distance of the discharge
nozzle is too long.
2)
There is leakage of the
HF capacitor 102/10KV.
3)
The relay is damaged.
4)
The input voltage is too
low.
Arc can not be ignited.
The air pressure is too high
or too low.
