KAESER ESD.2C - Checking the Cooling Oil Level; Checking the Overheating Safety Shutdown Function

➤ Follow the detailed description of this procedure in the SIGMA CONTROL 2 operating
manual
➤ Never operate the machine without a correctly functioning pressure relief valve.
➤ Have a defect pressure relief valve replaced immediately.
WARNING
Excessive noise is caused when the pressure relief valve blows off!
➤ Close all access doors; replace and secure all removable panels.
➤ Wear hearing protection.
Precondition The machine is switched off.
1. Close the user's shut-off valve at the inlet and outlet ends.
2. Read off the activating pressure on the valve.
(the activating pressure is usually to be found at the end of the part identification)
3. Log on to SIGMA CONTROL 2 with access level 2.
4. Observe the display of pressure on SIGMA CONTROL 2 and call up the test function.
5. WARNING!
Risk of burns due to released cooling oil and gas when blowing off the pressure relief valve!
➤ Close all access doors; replace and secure all removable panels.
➤ Wear eye protection.
6. End the test as soon as the pressure relief valve blows off or working pressure exceeds the
activating pressure of the pressure relief valve by nearly 1 bar.
7. If necessary, vent the machine and replace the defective pressure relief valve.
8. Deactivate the test function
9. Open the user's shut-off valve at the inlet and outlet ends.
10.12 Checking the overheating safety shutdown function
The machine should shut down if the airend discharge temperature reaches a maximum of 110 °C.
➤ Check the safety shutdown function as described in the SIGMA CONTROL 2 operating man‐
ual.
The machine does not shut down?
➤ Have the safety shutdown function checked by an authorised KAESER Service Techni‐
cian.
10.13 Checking the cooling oil level
In frequency-controlled compressors (SFC) the oil level indicator is only accurate when the
machine is running at or near maximum speed.
The lower the pressure at the compressed gas outlet, the higher the speed.
SIGMA CONTROL 2 displays this value.
Precondition The machine has been running at least 5 minutes under LOAD.
10 Maintenance
10.12 Checking the overheating safety shutdown function
ESD_2C_10357405_10–LIN_00 E
Service Manual Screw Compressor
ESD 442/14 bar (abs) SFC SIGMA CONTROL 2
65