KAESER ESD 352 SFC, Technical Documentation Manual

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If the alarm message
pRV ⇞ appears, the safety relief valve is defective. The permissible
internal pressure was exceeded by 30 psi.
➤ Have the safety relief valve replaced.
Avoid oil mist:
➤ Release the «ON» key immediately when the safety relief valve responds, in order to pre‐
vent unnecessary oil mist.
Correct conclusion of the test
1. Press «Enter» to switch into setting mode.
The check box flashes in the active line.
2. Use the «DOWN» key to deactivate the check box.
3. Press «Enter» to accept the setting.
The test mode is deactivated and the test is completed.
4. Press «Escape» repeatedly to return to the main menu.
5. Open the shut-off valve from the machine.
Result The machine is ready for operation.
Resetting
If the test is canceled when opening the safety relief valve, SIGMA CONTROL 2 will indicate the
highest measured value as internal pressure.
Activate the check box for reset in order to reset the stored value.
➤ Activate the check box.
8.11 Checking the temperature sensor and overheating shutdown func‐
tion
The machine should shut down if the airend discharge temperature (ADT) reaches a maximum of
230 °F.
SIGMA CONTROL 2 will simulate a higher temperature for checking this function.
For this purpose, SIGMA CONTROL 2 automatically determines an offset value to be displayed.
During the test mode, this is added to the actual airend discharge temperature to cause the ma‐
chine to shut down prematurely.
In standard operation, SIGMA CONTROL 2 generates the "overtemperature" fault message when
the maximum airend discharge temperature is reached. Since the modified test temperature is 4 °F
below the fault message switching point for overtemperature, the system will not generate a fault
message in test mode.
Overview
■ Shut down the machine and allow to cool down slightly
■ Perform the test
■ Correct conclusion of the test
■ Resetting
Performing the test
Precondition Machine cooled down by approximately 40 °F
8 Operation
8.11 Checking the temperature sensor and overheating shutdown function
154
Service manual Controller
SIGMA CONTROL 2 SCREW FLUID 1.1.3
9_9450 03USE