10.10 Checking the Overheating Safety Shutdown Function
The machine should shut down if the airend discharge temperature reaches a maximum of 230 °F.
➤ Have the safety shutdown function checked by an authorized KAESER Service representative.
10.11 Checking the cooling oil level
The oil level can be checked safely through the viewing window. The oil indicator should be fully filled
with oil when the machine is at standstill. The correct oil level cannot be seen.
The ideal situation is with the oil level around the optimum mark when the machine is running.
Operating state
Minimum oil level
Maximum oil level
LOAD
Tab. 38 Permissible cooling oil level under LOAD
Precondition The machine has been running at least 5 minutes under LOAD.
Fig. 30 Checking the cooling oil level
1
Minimum oil level
2
Maximum oil level
3
Optimum level
➤ Check the oil level with machine running under LOAD.
Result Top up when the indicator shows minimum level.
10.12 Venting the machine (depressurizing)
The machine must be isolated from the compressed air system and completely vented before
undertaking any work on the pressure system.
The oil circuit vents automatically as soon as the machine is stopped.
Venting takes place in three stages:
■ Isolate the compressor from the compressed air system.
■ Vent air from the oil separator tank.
■ Vent air manually from the air cooler.
10 Maintenance
10.10 Checking the Overheating Safety Shutdown Function
62
Service manual Screw compressor
Aircenter SX 3/7.5 SIGMA CONTROL BASIC
Number: 9_6945 01USE
