28 | CFW300
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Troubleshooting and Maintenance
6.4 PREVENTIVE MAINTENANCE
DANGER!
Always turn off the mains power supply before touching any electrical component
associated to the inverter.
High voltages may still be present even after disconnecting the power supply.
To prevent electric shock, wait at least ten minutes after turning off the input
power for the complete discharge of the power capacitors. Always connect the
equipment frame size to the protective ground (PE). Use the adequate connection
terminal at the inverter.
ATTENTION!
The electronic boards have electrostatic discharge sensitive components.
Do not touch the components or connectors directly. If necessary, first touch the
grounded metallic frame size or wear a ground strap.
Do not perform any withstand voltage test: if necessary, consult WEG.
The inverters require low maintenance when properly installed and operated. Table 6.2 on page
28 presents the main procedures and time intervals for preventive maintenance. Table 6.3
on page 29 provides recommended periodic inspections to be performed every 6 months
after the inverter start-up.
Table 6. 2: Preventive maintenance
Maintenance Interval Instructions
Fan replacement After 40000 operating hours Replacement
Electrolytic
capacitors
If the inverter
is stocked (not
being used):
“Reforming”
Every year from the
manufacturing date printed on
the inverter identification label
(refer to Section 2.5 RECEIVING
AND STORAGE on page 8).
Apply power to the inverter (voltage between
220 and 230 Vac, single-phase/three-phase or
DC (according to the model of the inverter), 50 or
60 Hz) for at least one hour. Then, disconnect
the power supply and wait at least 24 hours
before using the inverter (reapply power)
Inverter is being
used: replace
Every 10 years Contact WEG technical support to obtain
replacement procedures
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