Jasic Plasma Cut 100, Operator'S Manual

Page: 17 / 21

Maintenance and troubleshooting
7
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.
15
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.
Fault symptom Possible cause
Turn on the machine, the power
indicator illuminates, the fan does
not work, and the control bu7on
does not func8on
.
Overvoltage protec8on occurs: Shut
down the machine, and restart it
a>er a few minutes.
Turn on the machine, the power
indicator illuminates and the fan
works. When pressing the control
bu7on of the cuAng torch, the
solenoid valve inside the machine
func8ons, but there is no HF
discharge rustling and the red LED
inside the machine is on
.
1) The MOSFET (or IGBT) on the
top PCB is damaged. (The drive
module is damaged.)
2) The step-up transformer on the
bo7om PCB is damaged.
3) T h e c o n t r o l m o d u l e i s
damaged.
Turn on the machine, the power
indicator illuminates and the fan
works. When pressing the control
bu7on of the cuAng torch, the
solenoid valve inside the machine
func8ons, but there is no HF
discharge rustling and the red LED
inside the machine is off
.
The arc igni8on part fails:
1) There is electrode s8cking
inside the discharge nozzle or
the electrode distance of the
discharge nozzle is too long.
2) There is short circuit or bad
contact in the primary coil of
the arc igni8on transformer.
3) There is leakage of the HF
capacitor 102/10KV.
4) The relay is damaged.
Arc can not be ignited.
1) The input voltage is too low.
2) The air pressure is overly high
or overly low.