Mantenance; Basic Troubleshooting - KNOVA KN INW-160 Manual

OPERATION INSTRUCTION
Procedure
a) Connect to the power switch digital ammeter lights on.
b) To adjust the current potentiometer to the required
value of the welding.
c) Pick up electrode holder, and point at the welding edge.
Then put the electrode on the workpiece, you can start
welding.
Electrode Replacement
When the electrode is left only 2~3cm away from the holder,
you have to replace new one to go on working.
NOTES: When the electrodes combustion is in process at
high heat, do not touch it with bare hands while replacing
MAINTENANCE
• The major difference between inverter arc welder and
traditional welder is the inverter welder has lots of
advanced electronic components. What's more, it is high
technology product. And this requires high skill
maintenance.
• It is very essential to do daily maintenance. You must be
responsible for examination and repair. Once you do not
have the ability to check it, kindly contact with
manufacturer to acquire the service and support
of technology.
The following is the steps for maintaining:
a) Dust removal.
b) Remove dust by professionals with dry and clean
compressed air (using a compressor or Paper Tiger)
regularly. Meanwhile, check inter circuit of welding
machine regularly and make sure the cable is connected
correctly and connectors are connected tightly. If scale

BASIC TROUBLESHOOTING

Description
1 Abnormal indicator
2 Current knob broken
3 Motor fan can't
wor or low
rotational speed
4 No open circuit
voltage
5 Electrode holder cable
is too hot; output
terminals are too hot.
6 Power off
7 Other problems
WARNING
The machine has the function of prohibit switching power supply in rapid succession within a short
period of time for switching on and off. The power will not open then (the indicator light is not on or the fan does
not work or there is no-load voltage). Shut down the power switch and resume back to normal after a few minutes.
Possible cause
Bad ventilation leads to overheating protection
High environmental temperature
Exceed rated duty cycle
Potentiometer damaged
Bad power switch
Bad fan
Led broken
Overheating
Bad power switch
Capacity on electrode holder is too small
Cable is too thin
Socket is loosen
Power capacity is not big enough
Welding process
it. Besides, the electrode head down should be unified in
a metal container. And the cover coating should not be
caught by the holder. Scratch gently when igniting the arc,
otherwise it is easy to come across the phenomenon
of sticking electrode.
Slag Removal
After finishing work, you should remove the slag with specific
knock residue tools in the way of knocking.
WARNING
The welding slag should not be removed
until it is cooled down. Don't point it at the other
people while knocking on the slag incase that it will do
harm with pop-up slag.
and loose are found, please give a good polish to them.
Then connect them again tightly. Generally, if welding
machine is operating in environment where there is no
heavy accumulated dust, the machine need remove dust
once a year. If in the environment where is polluted
with smokes and polluted air, it is needed to be removed
once or even twice of each season.
c) To maintain good contact with cable and plugs.
d) Check up the contact conditions of cable and plug
frequently, at least once a month for stationary use.
WARNING
Due to high voltage in the main circuit
of the welder, you need to do the safety precaution
measure to prevent accidental electric shock. Don't
open the shell except for the professionals.
Remember to turn off the power before removing
dust. And don't meddle with the connections and
components when doing this work.
Improve ventilation conditions
Automatic recovery after decreasing
Replace potentiometer
Replace it
Replace the switch
Replace the fan
Check the circuit
See point 1
Replace the switch
Replace larger capacity electrode holder
Replace a proper cable
Remove the oxide coat and re-tight it
Enlarge the capacity
Contact the supplier
Contact the supplier
5
Remedy