1. Open the access panel
2
while the machine is running.
The machine shuts down automatically. The controller displays an alarm message.
2. Close the panel and acknowledge the alarm.
The machine does not shut down?
➤ Have the interlock switch checked by an authorised KAESER Service representative.
7.8 Starting the machine for the first time
Precondition No personnel are working on the machine.
All access doors are closed.
All removable panels are in place and secured.
1. Open the shut-off valve to the air network.
2. Switch on the power supply isolating device.
After the controller has carried out a self-test, the green
Control voltage
LED is lit continuously.
3. Press the «ON »key.
The green
Machine ON
LED is lit continuously.
The drive motor runs up and after a short time the machine switches to LOAD and delivers
compressed air.
➤ Watch for any faults occurring in the first hour of operation.
➤ After the first 50 operating hours, check all electrical connections and tighten where nec‐
essary.
Does the machine stop when the compressor motor rotates in the wrong direction?
➤ Switch off and lock out the power supply isolating device and verify the absence of volt‐
age.
➤ Changeover phase lines L1 and L2.
7.9 Setting the setpoint pressure
The setpoint pressure (cut-out pressure) is factory set at the maximum permissible working pres‐
sure of the compressor.
Adjustment is necessary for individual operating conditions.
Do not set the setpoint pressure of the machine higher than the maximum working pressure
of the compressed air system.
The machine may not toggle more than twice per minute between LOAD and IDLE.
To reduce the cycling (toggling) frequency:
➤ Increase the difference between cut-in and cut-out pressure.
➤ Add a larger air receiver downstream to increase buffer capacity.
Setpoint pressure: switching point
1. Scroll with the arrow keys until the parameter D "setpoint pressure: switch.point" is displayed in
line 3.
2. Press and hold «enter» for at least 3 seconds until the cursor flashes.
3. Use the arrow keys to set the desired switching point and confirm with «enter».
7
Initial Start-up
7.8
Starting the machine for the first time
50
Service Manual Screw Compressor
ASK T SIGMA CONTROL BASIC
9_5717 20 E
