WEG CFW-11 User Manual - page 89
Troubleshooting and Maintenance
6
6-10 | CFW-11
Table 6.3 - Preventive maintenance
Maintenance
Interval
Instructions
Fan replacement
After 50000 operating hours
(1)
Replacement procedure shown in
Keypad battery replacement
Every 10 years
Electrolytic
capacitors
If the inverter is stocked
(not being used):
"Reforming"
Every year from the manufacturing
date printed in the inverter
identification label (refer to
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
(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 operating hours of the fan in parameter P0045. When this parameter reaches 50000 operating
hours, the keypad display will show alarm A177.
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 fan. Refer to the
Check the fan connection
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 Link capacitors
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 needed, remove the boards from the inverter.
Always wear a ground strap.