26
USER GUIDE
ENTEGRIS, INC.
INVUE INTEGRATED FLOW CONTROLLERS, MODELS NT6510, NT6520
Symptom
Possible Causes
Suggestions
9. Unit not
responding
to a setpoint.
24 VDC is continuously
applied to 9-Green/Pin J
re-zero input line.
Re-zero input line should only
be energized when re-zero is needed.
10. Unit opens
(port-to-port
leak) when
power is
turned off.
Line pressure can push the
motorized valve open.
Keep power applied to unit.
Do not pressurize unit while
powered off.