Parameter Meaning
A
Fan: switching differential
The difference between cut-in and cut-out temperatures is the fan switching differen‐
tial.
Only an authorized KAESER service representative has the right to change this pa‐
rameter.
B
Fan: switching point
The switching point determines the fan cut-in temperature.
Only KAESER Service has the right to change this parameter.
C
System setpoint pressure: switching differential
The switching differential determines the distance between cut-in and cut-out pressure
(system set-point pressure: switching point) and thus the switching frequency from
LOAD to READY.
Setting range [psi]: 14.5 – 72.5
D
System setpoint pressure: switching point
The switching point corresponds to the working pressure of the air system and the cut-
out pressure of the machine.
Setting range [psi]: 80 - maximum operating overpressure
E
System setpoint pressure: maximum possible setting
Only an authorized KAESER service representative has the right to change this pa‐
rameter.
F
Main contactor: Maximum permitted number of switching cycles reached
This parameter (value: OFF) and the
S warning message are displayed as soon as the
maximum permitted number of switching cycles is reached.
A password is required to change this parameter.
Replace the main contactor and reset the parameter:
■ OFF: Maximum permitted number of switching cycles reached.
■ ON: The counter is reset and the
S warning message is acknowledged.
G
Options
The displayed values inform KAESER Service concerning the controller's internal ma‐
chine configuration.
Tab. 29 Parameter
Further information For changing or adjusting parameters, please see chapter 8.3.
4.8.3 Messages
Alarm message
An alarm shuts the machine down automatically. The red LED
13
Warning message
The yellow LED lights
15
(Fig. 9) to indicate a warning.
4
Design and Function
4.8
Functional description – SIGMA CONTROL BASIC
32
Operator Manual Screw Compressor
AIRTOWER 3C–7.5C Tri-Voltage
9_6917 34 USE