WEG CFW-11 - Cleaning Instructions

Troubleshooting and Maintenance
6-7
6
Table 6.3 - Preventive maintenance
Maintenance Interval Instructions
Fan replacement After 50000 operating hours.
(1)
Replacement procedure shown in figures 6.1 and 6.2.
Keypad battery replacement Every 10 years. Refer to chapter 4.
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 item
2.4).
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 factory set 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.
Component Problem Corrective Action
Terminals, connectors Loose screws Tighten
Loose connectors
Fans / Cooling system Dirty fans Cleaning
Abnormal acoustic noise Replace fan. Refer to figures 6.1 and 6.2.
Blocked fan Check the fan connection.
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 / Accumulation of dust, oil, humidity, etc. Cleaning
Power connections
Loose connection screws Tighten
DC bus capacitors Discoloration / odor / electrolyte leakage Replacement
(DC link)
Expanded or broken safety valve
Frame expansion
Power resistors Discoloration Replacement
Odor
Heatsink Dust accumulation Cleaning
Dirty
Table 6.4 - Recommended periodic inspections - Every 6 months
6.5.1 Cleaning Instructions
If needed to clean the inverter, follow the guidelines 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.