KAESER KOMPRESSOREN SX, Service Manual, Page: 69 / 122

Carrying out the check
The machine starts in IDLE as soon as it is switched on.
As long as the «ON» key is depressed and held, the machine switches to LOAD and pressure builds
up in the oil separator tank. When the «ON» key is released, the machine switches back to IDLE and
switches automatically to STANDSTILLwhen the idling period has elapsed.
Precondition The machine is switched off.
WARNING
The pressure relief valve may blow off at any time!
Excessive noise is caused when the pressure relief valve blows off!
There is danger of scalding from hot oil.
There is danger of injury from bursting components and compressed air!
➤ Close all access doors and replace and secure all removable panels.
➤ Wear ear and eye protection.
➤ Abort the test if the working pressure rises 10% above the activating pressure of the valve.
1. Press the «ON» key.
The machine starts in IDLE.
2. Observe the display of pressure on SIGMA CONTROL BASIC while depressing and holding the
«ON» key.
3. Stop the test as soon as the pressure relief valve blows off or working pressure rises to 10%
above the activating pressure of the pressure relief valve.
4. If necessary, vent the machine and replace the defective pressure relief valve.
Returning the machine to operational
1. Call up the edit mode again and enter the password "BASIC".
2. Use the arrow keys to set the parameter to "off" and confirm with the enter key.
3. Open the user's shut-off valve between the machine and the air distribution network.
10.11 Checking the Excess Temperature Safety Shutdown Function
The machine should shut down if the airend discharge temperature reaches a maximum of 110 °C.
➤ Have the safety shutdown function checked by an authorized KAESER service representative.
10.12 Venting the Machine (depressurizing)
The machine must be isolated from the air system and completely vented before undertaking
any work on the pressure system.
The oil circulation vents automatically as soon as the machine is stopped.
Venting takes place in three stages:
■ Isolate the compressor from the air system.
■ Vent the oil separator tank.
■ Manually vent the air cooler.
10 Maintenance
10.11 Checking the Excess Temperature Safety Shutdown Function
9_6919 04 E
Service Manual Screw Compressor
SX SIGMA CONTROL BASIC
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