Ronch 250MIG, User Manual

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Observe that Whether the current output cable is damaged. If it is damaged, it should
be wrapped up, insulated or changed.
Monthly
examination
Using the dry compressed air to clear the inside of arc welding machine. Especially for
clearing up the dusts on radiator, main voltage transformer, inductance, IGBT
module, the fast recover diode and PCB, etc.
Check up the bolt in arc welding machine, if it is loose, please screw down it. If it is
skid, please replace. If it is rusty, please erase rust on bolt to ensure it works well.
Quarter-
yearly
examination Whether the actual current accords with the displaying value. If they did not accord,
they should be regulated. The actual current value can be measured by the adjusted
plier-type ampere meter.
Yearly
examination
Measure the insulating impedance among the main circuit, PCB and case, if it below
1MΩ, insulation is thought to be damaged and need to change, and need to change
or strengthen insulation.
• 5.2. Troubleshooting
Before arc welding machines are dispatched from the factory, they have already been debugged
accurately. So forbid anyone who is not authorized by our company to do any change to the
equipment!
Maintenance course must be operated carefully. If any wire becomes flexible or is misplaced, it
maybe potential danger to user!
Only professional maintenance personal who is authorized by our company could overhaul the
machine!
Guarantee to shut off the arc welding machine’s power before turn on the outline of the
equipment!
If there is any problem and has no the authorized professional maintenance personal of our
company, please contact our local agent or the branch company!
If there are some simple troubles with the welding machine, you can consult the following Chart:
NO. Troubles Reasons Solution
1
Close the breaker, but the
power light isn’t on
Breaker damaged Change it
Fuse damaged Change it
Power damaged Change it