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 notes
Disregard of safety notes can cause unforeseeable dangers!
➤ Follow the instructions in chapter 3 'Safety and Responsibility'.
➤ Allow maintenance work to be performed by authorised personnel only.
➤ Use one of the safety signs below to advise others that the machine is currently being serv‐
iced:
Sign Meaning
Don't activate the machine.
Warning:
The machine is being serviced.
Tab. 37 Advise others that the machine is being serviced.
➤ Before switching on, make sure that nobody is working on the machine and all access doors
and panels are closed.
When working on live components
Touching voltage carrying components can result in electric shocks, burns or death.
Dangerous voltages persist in the frequency converter and intermediate circuit capacitors for some
time after power is switched off.
Live components are exposed when the frequency converter cabinet is opened.
➤ Work on electrical equipment may only be carried out by authorised electricians.
➤ Switch off and lock out the power supply disconnecting (isolating) device and check that no
voltage is present.
➤ Check that there is no voltage on potential-free contacts.
➤ Before starting work on the frequency converter or intermediate circuit capacitors, wait at least
5 minutes.
When working on the compressed air system
Compressed gas 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.
10 Maintenance
10.1 Ensuring safety
ESD_2C_10357405_10–LIN_00 E
Service Manual Screw Compressor
ESD 442/14 bar (abs) SFC SIGMA CONTROL 2
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