Bronkhorst BRIGHT User Manual
Page 8
English
8/16
Troubleshooting
No output signal
• No power supply
Check power supply
• PCB failure
Check cable
Return to factory
• Valve blocked
Clean valve (qualified personnel only)
• Filter or screen blocked
Clean filter or screen
• Sensor failure
Return instrument to factory
Maximum output signal
• PCB failure
Return instrument to factory
• Sensor failure
Return instrument to factory
High setpoint vs. output offset
• PCB failure
Return instrument to factory
• Valve blocked
Clean valve (qualified personnel only)
• Stoppage
Remove cause
• Pressure not correct
Check pressure
Signal lower than expected
• System stoppage
Remove cause
Flow is gradually decreasing
• (Gas) Condensation
Decrease supply pressure or increase
temperature
• Valve adjustment has changed
Check valve adjustment
• Controller adjustment wrong
Check controller setting
Oscillation
• Input pressure wrong
Adjust pressure
• Valve damaged
Check valve
• Volume / tubing between
controller and pressure
controller too small/ short
Improve situation
• Wrong controller settings
Check controller settings
Small flow occurs when valve is
supposed to be closed
• Valve is leaking
Check valve
Parameter not available
• Parameter is not supported by
the connected instrument.
Setpoint is neglected
• Instrument has wrong controller
mode
Set controller mode to ‘digital input’
• Alarm- or counterlimit reached
Reset alarm
Settings menu not accessible
• Security mode ‘blocked’ or
‘menu’
Change security mode
!
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:
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:
Contact Bronkhorst High-Tech local sales representative or send e-mail describing your problem to:
Doc nr.: 9.17.049