BRONKHORST EL-FLOW Select Series - Troubleshooting and service; Errors and warnings; Restoring factory settings

Bronkhorst®
Instruction Manual EL-FLOW® Select 9.17.099F46
5
Troubleshooting and service
To track down problems in the fluid system, it is recommended to disconnect the unit from the process line and check it
without applying fluid pressure. Dirt or clogging might be detected quickly by loosening fluid connections and performing
a visual inspection.
Energizing and de-energizing the equipment can indicate whether there is an electronic failure. After energizing, control
behavior can be checked by applying fluid pressure.
If you suspect leakage, do not disassemble the device for inspection, but contact your Bronkhorst representative for service
or repairs.
5.1 Errors and warnings
· During operation, the LEDs can indicate errors and/or warnings. See LED indications for an explanation of the LED
indications the instrument can give.
· 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 Digital operation (RS232).
5.2 Restoring factory settings
In case changes to the instrument configuration leads to non-recoverable erroneous behavior, the instrument can be reset
to the pre-configured factory settings. The easiest way to do this is with the multifunctional switch on top of the
instrument.
To restore the factory settings using the multifunctional switch, follow these instructions:
1. Make sure electrical power to the instrument is switched off
2. Press and hold the multifunctional switch, while powering up the instrument. After 4 seconds ,the red LED
•
starts
flashing (0.2 seconds on, 0.2 seconds off)
3. At that moment (which is after 4 to 8 seconds), release the switch
Changes made to the network settings (bus address, baud rate, parity) will not be restored by a factory reset.
Alternatively, factory settings can be restored in FlowPlot (via RS232 communication), or with a Bronkhorst® readout and
control unit (BRIGHT, E-8000).
If RS232 communication with the instrument can not be established, use the power-up functionality of the multifunctional
switch to switch to configuration mode and enable RS232 communication.
After restoring the factory settings, remember to leave configuration mode and restore the original communication
settings (otherwise, configuration mode remains enabled after power down).