ABB MultiDrive ACS600

- The cooling fan lifespan is approximately 40,000 hours. The actual lifespan depends on the frequency converter usage and ambient temperature. Fan failure can be predicted by increasing noise from fan bearings and gradual rise in the heatsink temperature in spite of heatsink cleaning. If the frequency converter is used in a critical part of a process, fan replacement is recommended once these symptoms appear.;

- When having filtering for cooling air, check and clean or replace filter mats if dirty. Wash dirty filter mats with water (60 °C) and detergent.

- The ACx 600 can run into overtemperature faults if the heatsink is not clean. In normal environment, the heatsink should be checked and cleaned annually. Use compressed air to remove dust from the heatsink. (The airflow direction must be from bottom to top.) Also, use a vacuum cleaner at the air outlet to trap the dust. Fan rotation must be prevented in order to prevent bearing damage.

- If spare modules are available, it is recommended to replace the cabinet modules with their spare modules once a year in order to avoid capacitor reforming and to equalize wear and tear on the modules. See section Capacitors below.

- Converter DC link capacitors need to be reformed (re-aged) if the converter has been non-operational for more than one year. Without reforming capacitors may be damaged when the converter starts to operate. The reforming methods introduced here require that the converter has been stocked clean and dry. It is recommended to reform the capacitors once a year.

- The ACx 600 intermediate circuit employs several electrolytic capacitors. The lifespan of the capacitors is approximately 100,000 hours, depending on the frequency converter loading and the ambient temperature

- Capacitor life can be prolonged by lowering the ambient temperature. It is not possible to predict capacitor failure. Capacitor failure is usually followed by a mains fuse failure or a fault trip. Contact ABB if capacitor failure is suspected. Replacements are available from ABB. Do not attempt operation with other than ABB specified spare parts.;

- Relays should be checked for function and all connections should be inspected and checked for tightness. Any signs of corrosion, especially in ground components, shall be cleaned off.

- The intermediate circuit of the converter is kept at its nominal voltage for the reforming time to "wake up" the capacitors. The reforming time required depends on how long the converter has been stocked (non-operational).;