164 MaintenanceSupply and inverter modules CleaningThe module heatsink fins pick up dust from the cooling air. The module runs intoovertemperature warnings and faults if the heatsink is not clean. In a “normal” environment(neither especially dusty nor clean), the heatsink should be checked annually, in a dustyenvironment more often.WARNING! Obey the instructions in chapter Safety instructions. If youignore them, injury or death, or damage to the equipment can occur.1. Stop the drive (if running) and do the steps in section Electrical safety precautions(page 19) before you start the work.2. Remove the cooling fan of the supply module as described under Fans elsewhere inthis chapter.3. Blow clean, dry and oilfree compressed air through the module from bottom to top,simultaneously using a vacuum cleaner at the air outlet to trap the dust. Note: Preventthe dust from entering adjoining equipment.4. Refit the cooling fan. Replacing a supply or inverter moduleWARNING! Make sure the replacement module has exactly the sametype code as the old module. See also section Licensing (page 30).Follow the module extraction and insertion procedures under Connecting the motor cables(units without common motor terminal cubicle or sine output filter) (page 109).
