WEG CFW700, Programming And Troubleshooting Manual

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Maintenance
20
CFW700 | 20-1
20 MAINTENANCE
20.1 PREVENTIVE MAINTENANCE
DANGER!
Always turn off the mains power supply before touching any electrical component associated to the
inverter.
High voltage may still be present even after disconnecting the power supply.
To prevent electric shock, wait at least 10 minutes after turning off the input power for the complete
discharge of the power capacitors.
Always connect the equipment frame 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 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. The table 20.1 presents the main
procedures and time intervals for preventive maintenance. The table 20.2 provides recommended periodic
inspections to be performed every 6 months after the inverter start-up.
Table 20.1: Preventive maintenance
Maintenance Interval Instructions
Fan replacement After 50000 operating hours.
(1)
Replacement procedure showed in figures 20.1 and 20.2 .
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 the
chapter 6 - Inverter
Model and Accessories
Identification
).
Apply power to the inverter (voltage between 220 and 230 Vac,
single-phase or three-phase, 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.
(1) The inverters are set at the factory for automatic fan control (P0352=2), which means that they will be turned on only when the heatsink temperature
exceeds a reference value. Therefore, the operating hours of the fan will depend on the inverter usage conditions (motor current, output frequency, cooling air
temperature, etc.). The inverter stores the number of fan operating hours in the parameter P0045. When this parameter reaches 50000 operating hours, the
keypad display shows the alarm A177.