Check cable
Return to factory
Clean valve (qualified personnel only)
• Filter or screen blocked
Return instrument to factory
Return instrument to factory
Return instrument to factory
High setpoint vs. output offset
Return instrument to factory
Clean valve (qualified personnel only)
Signal lower than expected
Flow is gradually decreasing
Decrease supply pressure or increase
temperature
• Valve adjustment has changed
• Controller adjustment wrong
• Volume / tubing between controller and
pressure controller too small/ short
• Wrong controller settings
Check controller settings
Small flow occurs when valve
is supposed to be closed
• Parameter is not supported by the
connected instrument.
• Instrument has wrong controller mode
Set controller mode to ‘digital input’
• Alarm- or counter limit reached
Settings menu not accessible
• Security mode ‘blocked’ or ‘menu’
Before switching on power, check if all connections have been made according to the hook-up diagram. The
hook-up diagrams are available at the download section of our website: http://www.bronkhorst.com
LED indications can be very useful in case of problems with the instrument. See the “MANUAL INTERFACE:
micro-switch and LED’s” section in the manual “Operation instructions digital instruments (document nr.
9.17.023)”. This manual is available at the download section of our website: http://www.bronkhorst.com
Contact Bronkhorst® local sales representative or send e-mail describing your problem to:
support@bronkhorst.com
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