WEG CFW-11 User Manual - page 100
Troubleshooting and Maintenance
6
6-10 | CFW-11
Table 6.4 - Recommended periodic inspections - Every 6 months
Component
Abnormality
Corrective Action
Terminals, connectors
Loose screws
Tighten
Loose connectors
Fans/cooling system
Dirty fans
Cleaning
Abnormal acoustic noise
Replace the fan. Refer to the
Figure 6.1 on page 6-11
for the removal of the fan. Install the new fan in the
reverse sequence of the removal
Check the fan connections
Blocked fan
Abnormal vibration
Dust in the cabinet air filter
Cleaning or replacement
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
Tighten
DC bus capacitors
(DC link)
Discoloration/odor/electrolyte leakage
Replacement
Expanded or broken safety valve
Frame expansion
Power resistors
Discoloration
Odor
Heatsink
Dust accumulation
Cleaning
Dirty
6.5.1 Cleaning Instructions
When it is necessary to clean the inverter, follow the instructions below:
Ventilation system:
Disconnect the inverter power supply and wait at least 10 minutes.
Remove the dust from the cooling air inlet by using a soft brush or a flannel.
Remove the dust from the heatsink fins and from the fan blades by using compressed air.
Electronic boards:
Disconnect the inverter power supply and wait at least 10 minutes.
Remove the dust from the electronic board by using an anti-static brush or an ion air gun (Charges Burtes
Ion Gun - reference A6030-6DESCO).
If necessary, remove the boards from the inverter.
Always wear a ground strap.