«EMERGENCY STOP» push button locked out!
The machine cannot be stopped quickly in an emergency.
➤ Check the function of the «EMERGENCY STOP» push button.
➤ Do not operate the machine if the «EMERGENCY STOP» push button does not work.
Precondition The machine is switched off.
The drive motor stands still.
1. Push the «EMERGENCY STOP» push button.
2. Check if «EMERGENCY STOP» push button locks properly and remains locked.
3. Check if the «EMERGENCY STOP» push button unlocks by turning it in the direction of the
arrow.
The «EMERGENCY STOP» push button cannot be pressed or does not engage.
➤ Do not start the machine.
➤ Have the «EMERGENCY STOP» push button replaced.
10.12.2 Have the activating pressure of the safety relief valve checked
The machine should shut down if the activating pressure of the safety relief valve reaches a maxi‐
mum of P
max.
(P
max.
Check in accordance with section: "Check activating pressure of safety relief valve" in the
separate operating manual for the SIGMA CONTROL SMART controller, chapter “Have safe‐
ty functions checked”.
Maximum working pressure: see machine nameplate
Maximum working pres‐
sure [psi]
Activating pressure [psi]
100
145
145
188
Tab. 78 Relief valve activating pressure
Material Hearing protection
Eye protection
Risk of hearing damage when air is blown out through the safety relief valve!
➤ Close all the doors/panels.
➤ Wear hearing protection.
Risk of burns due to released cooling oil and compressed air when blowing off the safety
relief valve!
➤ Wear eye protection.
➤ Have the activating pressure of the safety relief valve checked.
10 Maintenance
10.12 Check safety functions
150
Operator Manual Portable Rotary Screw Compressor
MOBILAIR M58utility SIGMA CONTROL SMART
No.: 901779 08 USE
