LOKERMANN GRAND PIPE 270 MULTI, User Manual, Page: 12 / 16

4.6
Operation
Notices
-
Read PRESCRIPTIONS AND COMPLIANCE MANUAL carefully before starting to use welding machine
specified in this manual!
-
Connect the ground wire with the machine directly.
-
Input power must be AC as single/three phases, 50Hz, and 110V-460V.
- When turning on the power switch, no-load voltage may be present at the output of the machine.
Do not touch the output electrode with any part of your body!
-
Before operation, none concerned people should leave the working area. Do not watch the arc in
unprotected eyes.
-
Ensure good ventilation of the machine to improve duty ratio.
-
Turn OFF the welding machine when the operation finished to economize energy usage.
-
When power switch shuts off protectively because of internal failure, don’t restart it until problem is
identified and resolved. Otherwise, the range of the problem will be extended.
5
Maintenance
& Troublesho-
oting
5.1
Maintenance
In order to guarantee safe and proper operation of arc welding machines, they must be maintained
regularly. Let customers understand the maintenance procedure of arc welding machines. Enable
customers to carry on simple examination and inspections. Do your best to reduce the fault rate and
repair times of arc welding machines to lengthen service life of arc welding machine. Maintenance
items in detail are in the following table.
● Warning: For safety while maintaining the machine, please shut off the supply power and wait for 5
minutes, until capacity voltage already drops to safe voltage 36V!
Date Maintenance items
Daily
examinati
on
Observe that the knobs and switches in the front and at the back of arc
welding machine are flexible and put correctly in place. If any knob has not
been put correctly in place, please correct. If you can't correct or fix the knob,
please replace immediately;
If any switch is not flexible or it can't be put correctly in place, please replace
immediately. Please get in touch with maintenance service department if there
are no accessories.
After turn-on power, watch/listen if the arc-welding machine has shaking,
whistle calling or peculiar smell. If there is one of the above problems, find out
the reason and clear it. If you can't find out the reason, please contact your local
service repair station or distributor/agent .
Observe that the display value of LED is intact. If the display number is not
intact, please replace the damaged LED. If it still doesn’t work, please maintain
or replace the display PCB.
Observe that the min/max values on LED agree with the set value. If there is
any difference and it has affected the normal welding results, please adjust it.
Check whether the fan is damaged and whether it is normal to rotate or
control. If the fan is damaged, please change immediately. If the fan does not
rotate after the machine is overheated, observe if there is something blocking
the blade. If it is blocked, please clear the problem. If the fan does not rotate
after getting rid of the above problems, you can poke the blade by the rotation
direction of fan. If the fan rotates normally, the start capacity should be
replaced. If not, change the fan.
Observe whether the fast connector is loose or overheated. If the arc- welding
machine has the above problems, it should be fastened or changed.
Observe whether the current output cable is damaged. If it is damaged, it
should be insulated or changed.
Monthly
examinati
on
Using the dry compressed air to clear the inside of arc welding machine.
Especially for clearing up the dusts on radiator, main voltage transformer,
inductors, IGBT modules, fast recover diodes, PCB’s, etc.
Check the screws and bolts in the machine. If any is loose, please screw it
tight. If it is shaved, please replace. If it is rusty, please erase rust on all bolts to
ensure it works well.
Quarter-
yearly
examinati
on
Check whether the actual current accords with the displaying value. If they did
not accord, they should be regulated. The actual welding current value can be
measured by and adjusted by plier-type ampere meter.
Yearly
examinati
on
Measure the insulating impedance among the main circuit, PCB and case, if it
below 1M Ω , insulation is thought to be damaged and need to change, and need
to change or strengthen insulation.