Line Indication Meaning
1 xx.x Current system pressure in bar, psi or MPa.
2 yy Current airend discharge temperature (ADT) in °C or °F.
3 z Display of parameters and their settings (see table 29)
4 1, 2, ... Error code for alarm and warning messages (see table 37 and table 38).
Operating state: LOAD
Tab. 28 Display
4.8.2 Parameter
Parameter Meaning
0 Operating hours counter
Displays the total time the drive motor was switched on.
Only an authorized KAESER service representative has the right to change this pa‐
rameter.
2 Maintenance interval counter
Displays the number of operating hours until the next scheduled maintenance is due.
SIGMA CONTROL BASIC counts down the operating hours from a default value. The
warning message
S
is displayed when the counter reaches zero.
The maintenance interval counter must be reset to its default value after the mainte‐
nance work has been carried out. The interval starts anew.
A password is required to change this parameter.
3 Relief valve test mode
This function switches the activating pressure check mode for the safety relief valve on
and off.
The warning message
i
is displayed when the check mode is switched on.
A password is required to change this parameter.
➤ Have the relief valve function checked by an authorized KAESER service repre‐
sentative as, by nature of the design, both cannot be tested together.
4 Temperature display unit
The airend outlet temperature can be displayed in either °C or °F.
5 Pressure display unit
The current working pressure can be displayed in bar, psi or MPa.
8 Switching the refrigeration dryer on/off
Factory setting: ON (Option T3)
This parameter switches the dryer permanently on or off:
■ OFF: refrigeration dryer off
■ ON: refrigeration dryer on
A password is required to change this parameter.
4 Design and Function
4.8 Functional description – SIGMA CONTROL BASIC
9_6917 34 USE
Operator Manual Screw Compressor
AIRTOWER 3C–7.5C Tri-Voltage
31
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