Some of these maintenance openings are fitted with liquid sensors sending a message to the
SIGMA CONTROL MOBIL controller when they register liquids. In the event of a fault, the engine
can no longer be started or the system automatically shuts the engine off.
In order to clean the machine, see chapter 4.7.8 for the location of the service openings.
Material Oil receptacle
Cleaning cloths
Precondition The machine is switched off.
The machine is standing level.
The machine is secured against moving.
The machine is fully vented, the pressure gauge reads 0 psig.
The machine has cooled down.
All compressed air consumers are disconnected and the air outlet valves are open.
The «battery isolating switch» is turned off.
Analysing the fault message on the controller
The machine's floor pan is connected to the SIGMA CONTROL MOBIL controller via liquid sen‐
sors. When these sensors detect accumulations of liquid in the floor pan, they send a fault mes‐
sage to the controller, and the machine is shut down and/or cannot be started.
■ The controller displays indicates "Liquid level in floor pan high".
■ The «Information» and «STOP» keys are illuminated.
■ The «Acknowledge» key flashes.
The message is stored in the event memory at the same time.
When this fault message appears, the accumulations of liquid within the machine must be
drained immediately.
Precondition Liquid leaking into the floor pan.
Fig. 93 Alarm message: "Liquid in the floor pan too high"
R1
Event memory category: Fault
R6
Message codes
R7
Operating hours since this occurred last
time
R8
Symbols for trouble-shooting
“Liquid level in floor pan high”
➤ Drain accumulated liquid.
➤ Open all doors.
10 Maintenance
10.11 Maintenance for Optional Items
No.: 9_9570 07 USE
Operator Manual Screw Compressor
M250 SIGMA CONTROL MOBIL
185