Interval Maintenance task see chapterUp to 1,000 h Maintain the drive belt. 10.9Check the air filter. 10.7Clean the cooler. 10.5Cooler:Clean the filter mat.10.3Control cabinet:Clean the filter mat.10.4Clean the refrigerant condenser. 10.18.1Display:SIGMA CONTROL BASICChange the air filter element. 10.7Cooler: Change the filter mat 10.5Control cabinet: Change the filter mat 10.4Display:SIGMA CONTROL BASICAt least annuallyChange the oil filter. 10.16Change the oil separator cartridge. 10.17Variable, see table 53 Change the cooling oil. 10.15Annually Check the pressure relief valve. 10.10Check the overheating safety shutdown function. 10.11Check the cooler for leaks. 10.5Maintain the heat recovery system. 10.6Check that all electrical connections are tight. –Have the refrigerant circuit checked and documented byan authorised KAESER Service Technician.–Have the safety pressure switch checked by an author‐ised KAESER Service Technician.–Up to 12,000 h Replace the drive belt. 10.9h = operating hoursTab. 52 Regular Maintenance Tasks10.2.4 Cooling oil: Change intervalDuty cycles and ambient conditions are important factors influencing the number and length of theoil change intervals.KAESER Service will support you in determining suitable intervals and provide information onthe possibilities of oil analysis.➤ Observe national regulations regarding the use of cooling oil in oil-injected rotary screw com‐pressors.10 Maintenance10.2 Following the maintenance plan9_5717 20 EService Manual Screw CompressorASK T SIGMA CONTROL BASIC 61
