Maintenance And Troubleshooting - Jasic JP-25C Operator's Manual

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Maintenance and troubleshooting

The following operation requires sufficient 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
efficiently 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
Period
Carry out a full visual inspection. Check
for any damage to the machine, leads,
cables and connections. Replace where
Daily
necessary.
examination
Switch on the machine and check for any
warning Led's and general operation
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, Mosfet modules, the fast
Monthly
recover diode and PCB, etc. Take care
examination
when blowing electronic components and
do not dislodge any wiring connections
Check the security of output connections
and plugs. Replace if signs of overheating.
Carry out an annual service. Check earth
continuity and insulation resistance of the
machine at the relevant points.
Yearly
examination
PLEASE NOTE THIS WORK SHOULD
BE CARRIED OUT BY A TRAINED
COMPETENT PERSON.
Maintenance item
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 off
before opening the case.
Malfunction
phenomena
Turn on the machine, the
power LED is on, but the fan Over voltage protection occurs: Check if
does not work, and the the mains voltage is identical with the
control button does not working voltage of the machine.
function.
Over current protection occurs:
Turn on the machine, the
1) The MOSFET on the top PCB is
power LED is on, and the fan
damaged. (The drive module is
works. When pressing the
damaged.)
control button of the cutting
2) The control module is damaged.
torch, the solenoid valve
Overheating protection occurs: It is
functions, and the red LED
unnecessary to shut down the machine,
inside the machine is on or
and it will recover after a few minutes.
the yellow LED on the front
panel is on.
Turn on the machine, the The arc ignition part fails:
power LED is on, and the fan 1) The air compressor inside the
works. When pressing the machine is damaged or not well
control button of the cutting connected.
torch, the solenoid valve 2) Check the electrode and nozzle of
functions, the red LED inside the cutting torch.
the machine is off, but there 3) The arc maintaining relay is
is no arc ignition. damaged.
Turn on the machine, the
1) The protective sleeve of the cutting
power LED is on, and the fan
torch head is not well installed.
works. When pressing the
2) T h e c u t t i n g t o r c h t r i g g e r i s
control button of the cutting
damaged.
torch,
Cause and solution
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