10 Maintenance
10.1 Ensuring safety
Follow the instructions below to ensure safe machine maintenance.
Warning instructions are located before a potentially dangerous task.
Disregard of warning instructions can cause serious injuries!
Complying with safety warnings
Disregard of safety warnings can cause unforeseeable dangers!
➤ Follow the instructions in chapter 3 “Safety and Responsibility”.
➤ Maintenance work may only be carried out by authorized personnel.
➤ Do not reuse removed self-locking nuts but replace with new ones. The non-positive safety
against loosening is no longer ensured when the nut is unscrewed.
➤ Use one of the safety signs below to advise others that the machine is currently being serv‐
iced:
Sign
Meaning
Do not activate the machine.
Warning:
The machine is being serviced.
Tab. 68 Advise others that the machine is being serviced
➤ Before switching on, make sure that:
■ no personnel is working on the machine,
■ all protective guards and cover panels are attached,
■ all doors, canopy, and panels are closed,
■ all tools have been removed from the machine.
➤ Do not perform any checks or maintenance while the machine is running.
The access doors are held up by gas struts.
➤ Check that the doors remain open.
If door does not remain opened: Have the gas-filled spring changed.
When working on the pressure system
Compressed air is contained energy. Uncontrolled release of this energy can cause serious injury
or death. The following safety concerns relate to any work on components that could be under
pressure.
➤ Disconnect the air consumers.
➤ Depressurize all pressurized components and enclosures.
■ Wait until the machine has automatically vented.
10 Maintenance
10.1 Ensuring safety
104
Operator Manual Screw Compressor
M250 SIGMA CONTROL MOBIL
No.: 9_9570 07 USE