VAT 64246-UEHC-0001 - User Manual

Questions and Answers:

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Sheryl JenkinsSep 23, 2025
What does error «E 21» mean on VAT Control Unit?
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  Corey CookSep 23, 2025
  If the display of your VAT Control Unit shows «E 21» and the position is 009999, it means the valve plate movement is limited during power up. This can be caused by a heavily contaminated valve unit, a mechanically obstructed valve plate or differential pressure on the gate. Consider cleaning the valve unit. You can also try to resolve the obstruction, reset the control unit, or cycle the power.
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Jasmine RiveraSep 3, 2025
Why is pressure not ‘0’ after ZERO on VAT Control Unit?
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  Paul MurphySep 3, 2025
  If the pressure is not ‘0’ after performing ZERO on your VAT Control Unit, it could be due to: * Sensor voltage shifting. Wait until the sensor stabilizes before performing ZERO. * The system not being pumped to base pressure. OPEN VALVE and bring the chamber to base pressure before performing ZERO. * The sensor offset voltage exceeding ±1.4V. Replace the pressure gauge.
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kmillerAug 27, 2025
What does it mean when VAT Control Unit display shows «D 0» Motor Interlock is open?
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  Denise BakerAug 27, 2025
  If the display shows «D 0», it means the Motor Interlock is open. Ensure the motor is receiving power. Refer to «Electrical connection» for details.
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Steve HollandSep 15, 2025
How to improve VAT 64246-UEHC-0001 PRESSURE CONTROL if it's not optimal?
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  Jacob EspinozaSep 15, 2025
  To optimize pressure control, perform the «Setup procedure» completely. Ensure that you perform LEARN. Also, make sure ZERO was performed before LEARN; if not, perform ZERO and then repeat LEARN. If LEARN was interrupted, repeat it. Ensure stable gas flow during LEARN. Tune the valve for your specific application. Check that the sensor range is suitable for the application and address any noise on the sensor signal by using a sensor with a suitable range.
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Alexander MarshallSep 18, 2025
What does error code 'E 40' mean on a VAT 64246-UEHC-0001 Control Unit?
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  brownmichaelSep 18, 2025
  Error 'E 40' indicates a motor driver failure has been detected. Replace the control and actuating unit according to the «Maintenance procedure».
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Stephanie HermanSep 6, 2025
Why is the pressure reading wrong or negative on my VAT Control Unit?
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  Paul LopezSep 6, 2025
  If the pressure reading on your VAT Control Unit is wrong or negative, check the sensor connections as described in «Electrical connection». Verify if a 2 sensor version is present at the valve controller and verify the configuration. Refer to «Setup procedure». Perform ZERO when base pressure is reached. Refer to «ZERO» for details. Also, verify the sensor supply voltage.
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cwiseSep 9, 2025
Why does VAT 64246-UEHC-0001 remote operation not work?
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  steven67Sep 9, 2025
  Remote operation of the VAT Control Unit might not work because local operation via the service port is active, or the safety mode is active (check for 'D' on the display). To resolve this, switch to remote operation and ensure the motor is powered. Refer to «Electrical connection» for details.
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Hunter SullivanSep 15, 2025
What to do if the VAT Control Unit display shows 'D 0' Motor Interlock is open?
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  gabrieljosephSep 15, 2025
  If the display shows 'D 0', it means the motor interlock is open. Ensure that power is supplied to the motor. For details, refer to «Electrical connection».
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jennifer19Sep 23, 2025
What to do if pressure is not ‘0’ after ZERO on VAT 64246-UEHC-0001 Control Unit?
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  Rose GuzmanSep 23, 2025
  If the pressure isn't ‘0’ after performing ZERO on your VAT Control Unit, it could be due to sensor voltage shifting, the system not being pumped to base pressure, or the sensor offset voltage exceeding ±1.4V. Wait until the sensor voltage stabilizes before performing ZERO. You can also try opening the valve and bringing the chamber to base pressure before performing ZERO.
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Scott BowmanAug 25, 2025
Why does the VAT 64246-UEHC-0001 Control Unit display show «E 21» (fatal error - rotation angle of valve plate limited during power up)?
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  conwayjuanAug 26, 2025
  The error «E 21» means the rotation angle of the valve plate is limited during power up. This could be due to a valve plate that is not centric adjusted, a heavily contaminated valve unit, or a mechanically obstructed valve plate. Adjust the valve plate, clean the valve unit, or resolve any obstruction. Additionally, you can reset the control unit by cycling the power OFF and then ON, or send a reset command locally via service port with CV/CPA/Service Box2.