SET-UP, OPERATION & TROUBLSHOOTING
26
wrapped up, insulated or changed.
Monthly
exam
Use dry compressed air to clean and remove dusts on radiator, main voltage
transformer, inductance coils, IGBT module, the fast recover diodes and PCB’s.
Check the cable lugs on arc welding machine, if loose, please screw down
securely. If burnt, please replace. If it is rusty, please remove rust on bolt & washer
for good contact.
Quarter-
yearly
exam
Check whether the actual current accords with the displaying value. If they do not
match, they should be regulated. The actual current value can be measured by the
adjusted plier-type ampere meter.
Yearly
exam
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 or strengthen
insulation.
5.2 Troubleshooting
Before arc welding machines are dispatched from the factory, they have already been
debugged accurately. So do not allow anyone who is not authorized by the factory to make
any changes 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 personnel authorized by factory should repair the machine!
Guarantee to shut off machine’s LINE power before any maintenance of the equipment!
If there are some simple problems, consult the following trouble-shooting chart:
S/N
Troubles
Reasons
Solution
1
Turn on the power source,
and fan works, but the power
pilot lamp is not on.
The power light damaged or connection
is not good
Check and repair Pr7
The transformer of power is broken
Repair or change the transformer
Control PCB failures
Repair or change the control Pr4
2
Turn on the power source,
and the power lamp is on, but
There is something in the fan
Clear out
The start capacitor of fan damaged
Change capacitor
