314 MaintenanceHeatsinkThe heatsink fins pick up dust from the cooling air. The drive runs intoovertemperature warnings and faults if the heatsink is not clean. In a normalenvironment, the heatsink should be checked annually, in a dusty environment moreoften.Clean the heatsink as follows (when necessary):1. Remove the cooling fan (see section Cooling fan).2. Blow clean compressed air (not humid) from bottom to top and simultaneouslyuse a vacuum cleaner at the air outlet to trap the dust. Note: If there is a risk ofthe dust entering adjoining equipment, perform the cleaning in another room.3. Refit the cooling fan.Every 6 years if the ambienttemperature is higher than40 °C (104 °F).Otherwise, every 9 years.Cooling fan replacement See Cooling fan on page 315.Every 10 years Control panel batteryreplacementThe battery is housed on therear of the control panel.Replace with a new CR 2032battery.
