Maintenance - Lincoln Electric INVERTEC CV350-R Service Manual

D-2
SAFETY PRECAUTIONS
Read the entire installation section before starting
installation.
WARNING
ELECTRIC SHOCK
• Only
should
installation.
• Turn the input power OFF at
the main switch before working
on this equipment. Turn off the input power to any
other equipment connected to the welding system
at the main switch before working on the
equipment.
• Do not touch electrically "Hot" parts.
• Always connect the INVERTEC
(located at the rear of the case) to a proper safety
(Earth) ground.
TM
INVERTEC is for use on a 4 wire system with earthed
neutral.
INPUT FILTER CAPACITOR
DISCHARGE PROCEDURE
WARNING
For any maintenance or repair operations it is
recommended to contact the nearest technical
service center

Maintenance

or
unauthorized service centers or personel will
null and void the manufacturers warranty.
WARNING
The machine has internal capacitors which are
charged to a high voltage during power-on
conditions. This voltage is dangerous and
must be discharged before the machine can
be serviced. Discharging
automatically by the machine each time the
power is switched off. However, you must
allow the machine to sit for at least 5 minutes
to allow time for the process to take place.
ROUTINE MAINTENANCE
The frequency of the maintenance operations
may vary in accordance with the working
MAINTENANCE
can kill.
qualified personnel
perform
TM
grounding lug
or Lincoln Electric.
repairs performed
is
INVERTEC
environment. Any noticeable damage should
be reported immediately.
• Check cables and connections integrity.
Replace, if necessary.
• Clean the power source inside by means of
lowpressure compressed air.
this
• Keep the machine clean. Use a soft dry
cloth to clean the external case, especially
the airflow inlet / outlet louvers.
Do not open this machine and do not
introduce anything into it's openings.
Power supply must be disconnected from the
machine before each maintenance and service.
Always use gloves in compliance with the
safety standards.
After each repair, perform proper tests to
ensure safety.
THERMAL PROTECTION
Thermostats
excessive operating temperatures. Excessive
temperatures may be caused by a lack of
by
cooling air or operating the machine beyond
the duty cycle and output rating. If excessive
operating temperature
thermostat will prevent output voltage or
current.
Thermostats
machine cools sufficiently. If the thermostat
shutdown was caused by excessive output or
duty cycle and the fan is operating and
normally, the Power Switch may be left on.
done
TM
CV350-R
WARNING
protect the machine
should occur,
are self-resetting
D-2
from
the
once the