ABB ACF5000 Manual page 157

Putting the FID in standby mode
Setting FID back to measuring mode
FID in fail-safe status
ACF5000 FTIR ANALYZER SYSTEM
If in the Standby/Restart FID menu the STANDBY or STANDBY PURGING
softkeys are displayed, the FID can be set to standby mode:
STANDBY Standby mode is activated.
STANDBY Standby mode with opening of the zero gas valve for purging
PURGING
the detector is activated (only when executing with test gas
connection).
If the FID is restarted from standby mode or after a flame error, the
Standby/Restart FID mode display the RESTART softkey:
RESTART Restart is carried out.
After initiating the restart, the menu can be left via Meas or Back; the restart
sequence continues to be executed.
The restart sequence can, however, also be observed further in the menu.
The current values for the flame temperature, the combustion air pressure
and the combustion gas pressure as well as the number of ignition attempts
are displayed.
If the ignition of the flame has failed after 10 ignition attempts, for the Ig-
nition attempt parameter, display 10 – failed is shown. By pressing the
RESTART softkey, a restart can be initiated.
If a serious fault has occurred in the FID, it is put in fail safe status; in the
menu Standby/Restart FID the indication Fail safe appears for the
parameter Status.
Fail-safe means: heater off, combustion gas valve closed, instrument air
valve closed, housing purging on, emergency purge activated.
The cause of the failure must be determined from the status messages
(see page 179).
A cold restart in the menu is not possible; after fault correction the analyzer
module must be cold restarted by switching off and on again.
| OI/ACF5000-EN REV. A 157