8 Operation
8.1 Switching on and off
Always switch the machine on with the «ON» key and off with the «OFF» key.
A power supply disconnecting device should be installed by the user.
Fig. 16 Switching on and off
1
Machine ON LED
2
«ON» key
3
«OFF» key
8
Controller voltage LED
11
«LOAD/IDLE» toggle key
19
LOAD LED
20
IDLE LED
8.1.1 Switching on
Precondition No personnel are working on the machine.
All access doors and panels are closed and secure.
1. Switch on the power supply disconnecting device.
The
Controller voltage LED lights green.
2. Press the «ON» key.
The
ON LED lights green.
If a power failure occurs, the machine is not prevented from restarting automatically when
power is resumed.
It can restart automatically as soon as power is restored.
Result The compressor motor starts as soon as system pressure is lower than the setpoint pressure (cut-
off pressure).
8.1.2 Switching off
1. Press the «OFF» key.
The machine switches to IDLE and the
IDLE LED flashes. The SIGMA CONTROL 2 displays
Stopping . The ON LED extinguishes as soon as the automatic shut-off action is completed.
2. Switch off and lock out the power supply disconnecting device.
8
Operation
8.1
Switching on and off
9_5875 33 USE
Operator Manual Screw Compressor
SM Tri-Voltage, SIGMA CONTROL 2
47
