Lincoln Electric V155-S - Manual (Page 22)

MAINTENANCE D-2 D-2
INVERTEC® V155-S
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SAFETY PRECAUTIONS
ELECTRIC SHOCK can kill.
• Have an electrician install and ser-
vice this equipment.
• Turn the input power off at the fuse
box, disconnect supply lines and
allow machine to sit for five minutes
minimum to allow the power capaci-
tors to discharge before working
inside this equipment.
• Do not touch electrically hot parts.
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INPUT FILTER CAPACITOR
DISCHARGE PROCEDURE
For any maintenance or repair operations it is recom-
mended to contact the nearest technical service center
or Lincoln Electric. Maintenance or repairs performed
by unauthorized service centers or personnel will null
and void the manufacturers warranty.
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 is
done 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.
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ROUTINE MAINTENANCE
The frequency of the maintenance operations may
vary in accordance with the working environment. Any
noticeable damage should be reported immediately.
• Check cables and connections integrity. Replace, if
necessary.
• Clean the power source inside by means of low -
pressure compressed air.
• 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 any-
thing into its openings. Power supply must be discon-
nected from the machine before each maintenance
and service. After each repair, perform proper tests to
ensure safety.
Power supply must be disconnected from the machine
before each maintenance and service. Always use
gloves in compliance with the safety standards.
THERMAL PROTECTION
The V155-S has a thermal,protective device (PTC) on
the Output Rectifier to protect against excessive durty
cycle. It also has an auto resetting fuse (ARFU) on the
Input Board to protect against incorrect line voltage
when connectecd to 120VAC. If either device opens,
the Thermal LED on the front panel will turn ON. See
the Operarion Section or the Troubleshooting Section
of this manual for corrective action.
WARNING
WARNING
WARNING
CAUTION
WARNING