Display of operational state
The machine's current operational state is shown in the lower half of the display. The following states
are available:
Item Operational state
Meaning of the
display
Explanation
B1
Ready to start
The machine can be started.
B2
IDLE
The machine is running in IDLE.
B3
Start-up
The engine is run up.
B4
LOAD
The machine is running under LOAD.
B5
60 s
Run-on phase
Cool-down function
The timer setting is 60 seconds.
B6
Cool-down
phase when ma‐
chine overhea‐
ted
Cool-down phase when the compressor
and/or engine coolant overheated.
B7
7 bar
Back pressure The remaining pressure in the OST* is
displayed and the machine cannot be
started.
The display is in bar or psi as selected by
the user.
B8
20 s
Start inhibit
A start sequence is inhibited and the dis‐
play shows the time remaining until the
next start sequence is allowed.
The timer setting is 20 seconds.
OST* = oil separator tank
Tab. 44 Display of operational state
4.7.2 SIGMA CONTROL MOBIL operating sequence
Operating
sequence
Key
Indication
Explanation
Ready to start
The «Start» key flashes.
* ADT = airend discharge temperature
** ECT = engine coolant temperature
*** OST = oil separator tank
4
Design and Function
4.7
SIGMA CONTROL MOBIL function
36
Service Manual Screw Compressor
M170 SIGMA CONTROL MOBIL
No.: 9_9425 01 E