INVERTEC V300-I
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D-2
MAINTENANCE
• Input Filter Capacitors
• Output Terminalss
4. Examine capacitors for leakage or ooz-
ing. Replace if needed.
5. Examine wrap-around cover for dents or
breakage. Repair as needed. Cover
must be kept in good condition to assure
high voltage parts are protected and cor-
rect spacings are maintained.
6. Check electrical ground continuity. Using
an ohmmeter, measure resistance
between either output stud and an
unpainted surface of the machine case.
(See Figure D.2 for locations.) Meter
reading should be 500,000 ohms or
more. If meter reading is less than
500,000 ohms, check for electrical com-
ponents that are not properly insulated
from the case. Correct insulation if need-
ed.
7. Replace machine cover and screws.
PREVENTIVE MAINTENANCE
1. Perform the following preventive mainte-
nance procedures at least once every six
months. It is good practice to keep a pre-
ventive maintenance record; a record tag
attached to the machine works best.
2. Remove the machine wrap-around cover
and perform the input filter capacitor dis-
charge procedure (detail at the beginning
of this chapter).
3. Clean the inside of the machine with a
low pressure airstream. Be sure to clean
the following components thoroughly.
See Figure D.2 for location of these com-
ponents.
• Power Switch, Driver, Protection, and
Control printed circuit boards
• Power Switch
• Main Transformer
• Input Rectifier
• Heat Sink Fins
