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Failure |
Check |
Action |
---|---|---|
Display does not light up |
-24 V power supply |
-Connect valve to power supply according to |
Remote operation does not work |
-Local operation via service port active |
-Switch to remote or locked operation |
-Safety mode active |
-Check ‘Drive Power Enable Switch’ |
|
-Interlock mode active |
-Check Digital Input |
|
POSITION CONTROL does not work |
-Safety mode active |
-Check ‘Drive Power Enable Switch’ |
-Interlock mode active |
-Check Digital Input |
|
-POSITION CONTROL selected, check for A on display? |
-Select POSITION CONTROL mode. |
|
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. |
-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. |
-LEARN done? |
-Perform LEARN. Refer to |
|
-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 |
-ZERO performed before LEARN? |
-Perform ZERO then repeat LEARN. |
|
-Was gas flow stable during LEARN? |
-Repeat LEARN with stable gas flow. Refer to |
|
-Tuning done? |
-Tune valve for application. |
|
-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. |