4.8 Safety Devices
The following safety devices are provided and may not be modified in any way:
■ «EMERGENCY STOP» button,
The «EMERGENCY STOP» button shuts down the machine immediately. The motor remains
stopped. The pressure system is vented.
■ Safety relief valve:
The safety relief valve protects the machine from excessive pressure. This is factory set.
■ Door interlock switches:
The machine will stop automatically if a safety interlocked door or panel is opened or removed.
■ Enclosures and covers for moving parts and electrical connections:
These protect against accidental contact.
4.9 SIGMA CONTROL Keys and Indicators
Fig. 11 Keys
Item Description Function
1 «ON» Switches on the machine.
The programmed operating mode is active.
2 «OFF» Switches the machine off.
3 «Clock» Switches clock control on and off.
4 «Remote control» Switches remote control on and off.
5 «LOAD/IDLE» Toggles the compressor between LOAD and IDLE operating modes.
6 «DOWN» Scrolls down the menu options.
Reduces a parameter value.
7 «UP» Scrolls up the menu options.
Increases a parameter value.
8 «escape» Returns to the next higher menu option level.
Exits the edit mode without saving.
Returns to the main menu when held down at least 10 seconds.
4 Design and Function
4.8 Safety Devices
30
Service Manual Screw Compressor
ASD T Tri-Voltage 9_5721 06 USE
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