Troubleshooting And Service; Common Issues - BRONKHORST ES-FLOW 1 C Series Instruction Manual

8

Troubleshooting and service

Errors and warnings
See the troubleshooting guide
·
· Most other indications are specific to the installed communication interface; consult the according
a list of all indications.
· Error and warning information can also be found by connecting the instrument to FlowDDE and FlowPlot. FlowDDE
puts all errors and warnings on the console screen; FlowPlot provides several specific alarm and counter indicators. See
also section
General problems
· Electronic problems can be traced by restarting the equipment.
If the equipment starts up normally, the measurement and control behavior can be checked by applying fluid pressure.
·
· To track down problems in the fluid system, depressurize the fluid system and disconnect the suspected unit from the
process line. Dirt or clogging might be quickly detected by visual inspection on disassembled fluid connections.
If you suspect leakage, do not disassemble the device for inspection, but contact your Bronkhorst representative for service
or repairs.
8.1

Common issues

Symptom
No (fieldbus) communication
No output signal
Mode/MOD and Error/NET LEDs
blinking red alternately, no
communication
Red LED lit continuously,
measurement readout irregular
9.17.153A
for general LED indications that signify errors or warnings (red
Digital communication.
Possible cause
No power supply
Invalid node address
Invalid baud rate
Other
No power supply
Invalid control mode (instrument
accepts no setpoint)
No setpoint given or setpoint too
low
Valve(s) in default state (normally
closed)
Inlet pressure or differential
pressure too low
Piping, filters and/or control valve
clogged or blocked
Sensor failure
Initialization error
Gas in measuring tube
Inlet pressure unstable (flow rate
pulsating)
Instruction Manual ES-FLOW™ 1xxC
Bronkhorst®
Corrective action
· Check power supply
Check cable connection
·
· Check cable hook-up
Change node address (see
configuration)
Make sure instrument baud rate matches
master/application baud rate
Reset instrument and/or restart master. If
problem persists, contact your Bronkhorst
representative
· Check power supply
Check cable connection
·
· Check cable hook-up
Check control mode (see
Check if valves are in default/safe state; solve
cause if necessary (see
Increase inlet pressure
Clean fluid system (flush with clean, dry air or a
non-aggressive cleaning liquid, e.g. ethanol or
isopropyl alcohol)
Contact your Bronkhorst representative
Restart instrument. If problem persists, contact
Bronkhorst
Fill fluid lines homogeneously with process
liquid (see
Eliminate pressure fluctuations, e.g. by
installing a pressure regulator
l
) and possible causes.
interface manual
Network
Special parameters)
Default valve
First use)
for
state)
37