# General

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Failure | Check | Action
--- | --- | ---
Display does not light up | -24 V power supply | -Connect valve to power supply according to ‘Power, ground and sensor connection’ and make sure that power supply is working.
Remote operation does not work | -Local operation via service port active | -Switch to remote or locked operation Refer to ‘Remote and local operation’
-Safety mode active Check for S on display | -Check ‘Drive Power Enable Switch’ Refer to ‘Power, ground and sensor connection’
-Interlock mode active Check for I on display | -Check Digital Input Refer to ‘Power connector IO’ >> ‘Digital Input’
POSITION CONTROL does not work | -Safety mode active Check for S on display | -Check ‘Drive Power Enable Switch’ Refer to ‘Power, ground and sensor connection’
-Interlock mode active Check for I on display | -Check Digital Input Refer to ‘Power connector IO’ >> ‘Digital Input’
-POSITION CONTROL selected, check for A on display? | -Select POSITION CONTROL mode. Refer to ‘Control Mode’ in ‘EtherCAT’ interface
Pressure reading is wrong Pressure reading is negative | -Sensor connection | -Refer to ‘Power, ground and sensor connection’
-ZERO done? | -Perform ZERO when base pressure is reached. Refer to ‘Pressure Sensor’ >> ‘Zero Adjust’
-Does sensor power supply provide enough power for sensor(s)? | -Verify sensor supply voltage.
ZERO does not work | -zero disabled? | -Enable ZERO. Refer to ‘Pressure Sensor’ >> ‘Zero Adjust’
-Sensor voltage shifting? | -Wait until sensor does not shift any more before Performing ZERO.
Pressure is not ‘0’ after ZERO | -System pumped to base pressure? | -OPEN VALVE and bring chamber to base pressure before performing ZERO.
-Sensor offset voltage exceeds ±1.4V | -Adjust the offset direct at the sensor -Check function of the sensor.
PRESSURE CONTROL does not work | -PRESSURE CONTROL selected, check for P on display? | -Select PRESSURE CONTROL mode. Refer to ‘Control Mode’ in ‘EtherCAT’ interface
-LEARN done? | -Perform LEARN. Refer to ‘Pressure control’ >> ‘Adaptive algorithm’ >> ‘Learn’
-Sensor signal ok? | -Refer to ‘Pressure Sensor’
-Pressure control setup done | -Refer to ‘Pressure control’
PRESSURE CONTROL not optimal | -LEARN successfully done? | -Perform LEARN. Check ‘Status’ and ‘Warning Info’ in ‘Pressure control’ >> ‘Adaptive algorithm’ >> ‘Learn’
-ZERO performed before LEARN? | -Perform ZERO then repeat LEARN. Refer to ‘Pressure Sensor’ >> ‘Zero Adjust’
-Was gas flow stable during LEARN? | -Repeat LEARN with stable gas flow. Refer to ‘Pressure control’ >> ‘Adaptive algorithm’ >> ‘Learn’
-Tuning done? | -Tune valve for application. Refer to the tuning sections in ‘Pressure Control’
-Is sensor range suited for application? | -Use a sensor with suitable range (controlled pressure should be >3% and < 98% of sensor full scale).
-Noise on sensor signal? | -Make sure a shielded sensor cable is used.