CFW500 | 39
Troubleshooting and Maintenance
English
Table 6.2: Preventive maintenance
Maintenance Interval Instructions
Fan replacement After 40.000 hours of operation Replacement
Electrolytic
capacitors
If the inverter is
stocked (not in
use):
“Reforming”
Every year from the manufacturing
date printed on the inverter
identification label (refer to Section
2.4 IDENTIFICATION LABELS on
page 10)
Apply power to the inverter with
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 for at least 24 hours before
using the inverter (reapply power)
Inverter being
used: replace
Every 10 years Contact WEG technical support to
obtain replacement procedure
Table 6.3: Periodic inspection at every 6 months
Component Abnormality Corrective Action
Terminals, connectors Loose screws Tighten
Loose connectors
Fans /Cooling systems
(*)
Dirty fans Cleaning
Abnormal acoustic noise Replace fan
Blocked fan Cleaning or replacement
Abnormal vibration
Dust in the air filters
Printed circuit boards Accumulation of dust, oil, humidity, etc. Cleaning
Odor Replacement
Power module/Power
connections
Accumulation of dust, oil, humidity, etc. Cleaning
Loose connection screws Tightening
DC Link capacitors Discoloration/odor/electrolyte leakage Replacement
Safety valve expanded or broken
Frame size expansion
Power resistors Discoloration Replacement
Odor
Heatsink Accumulation of dust Cleaning
Dirt
(*) The fan of the CFW500 can be easily replaced as shown in Figure 6.1 on page 40.
6.5 CLEANING INSTRUCTIONS
When it is necessary to clean the inverter, follow the instructions below:
Ventilation system:
Disconnect the power supply of the inverter and wait for 10 minutes.
Remove de dust accumulated in the ventilation opening using a plastic brush or cloth.
Remove the dust accumulated on the fins of the heatsink and fan blades using compressed air.
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