Fig. 26 Checking the coupling
1 Safety screen
2 Coupling
Check for uneven or noisy running
Precondition The machine is running
➤ Check the coupling for noisy or uneven running
Make a visual check for damage
Precondition The power supply disconnecting device is switched off.
The disconnecting device is locked in the off position.
A check has been made that no voltage is present.
The machine has cooled down.
1. Remove the securing screws and take off the safety screen.
2. Turn the coupling my hand and look for damage or colour change.
3. Refit the safety screen.
4. Close all access doors and replace all enclosure panels.
Has the coupling cracks or colour changes?
➤ Have a damaged coupling changed by an authorised KAESER Service Technician.
10.11 Checking the pressure relief valve
In order to check the pressure relief valve, the machine's working pressure is raised above the acti‐
vating pressure of the valve.
Blow off protection and air system pressure monitoring are switched off during the test. In normal
operation, the blow-off protection will switch off the machine before the pressure relief valve re‐
sponds. During the inspection, the blow-off protection will switch off the machine only when the ac‐
tivating pressure of the pressure relief valve has been exceeded by 1 bar.
10 Maintenance
10.11 Checking the pressure relief valve
64
Service Manual Screw Compressor
ESD 442/14 bar (abs) SFC SIGMA CONTROL 2 ESD_2C_10357405_10–LIN_00 E
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