1-8. Periodic Maintenance and Inspection1-8-1. Periodic Replacement PartsThis table does not describe the guarantee period of part.The replacement period of each part depends on the environment and condition.Part Name Part No. Replacement Cycle ProcedureDC fan (40 square)! 1-855-374-11 Total power-on hours 40,000 h Refer to “2-5. DC Fan”.1-8-2. Cleaning of DC FanWhen the DC fan is contaminated with dust, clean the DC fan.When cleaning the DC fan, remove it then blow the air.For the procedure to remove the DC fan, refer to “2-5. DC Fan”.DC fanAXS-R7 1-16