Bronkhorst FLOW-SMS Series - Manual (Page 23)

BRONKHORST HIGH-TECH B.V.
5 Troubleshooting and service
5.1 General
For a correct analysis of the proper operation of a flow/pressure meter or controller it is recommended to remove the
unit from the process line and check it without applying fluid supply pressure. In case the unit is dirty, this can be
ascertained immediately by loosening the compression type couplings and, if applicable the flange on the inlet side.
Energizing or de‐energizing of the instrument indicates whether there is an electronic failure. After that, fluid pressure
is to be applied in order to check behaviour. If there should be suspicion of leakage in case of a gas unit, do not check
for bubbles with a leak detection liquid under the cover as this may lead to a short‐circuit in the sensor or p.c.board.
5.2 LED indication
The red LED on the instrument gives error or warning information.
  
Red LED Time Indication
Off Continuously No error
Flash Variable Bus activity on the Modbus interface
On Continuously Critical error message
A serious error occurred in the instrument
Instrument needs service before further using
For more information check the instruction manuals for digital communication/interfaces at
http://www.bronkhorst.com/en/downloads/instruction_manuals/
9.17.057 page 23