Siemens 125-5033 用户手册

 

Siemens Building Technologies, Inc. 

In addition to setting up the purge sequence to effectively handle the exhaust needs, 
decisions must be made on how to use the information available at the central reporting 
station. Consult your local Siemens Building Technologies, Inc. representative for more 
information on central reporting and trending of emergency purge information. 

If the Fume Hood Controller or one of its accessories fails, then a failure mode sequence will 
be initiated. 

If the Fume Hood Controller power fails, the exhaust flow control device will go to the full 
open position. Since there would be no power to the controller, no LEDs or display will be 
available on the ODP.  

If the power fails to both the exhaust fan and the controller, there will be no 
indication except for the absence of the noise that the air makes during 
normal operation. 

If the ODP fails, the controller will continue to control the fume hood face velocity. However, 
no display or audible alarming will be available. 

If the differential pressure transmitter fails, the controller will control the exhaust flow control 
device to the fully open position. The ODP will display FFF and GENERAL FAILURE. 

If the electronic actuator or interface board fails then alarms are displayed on the ODP 
indicating unsafe operating conditions. 

If the actuator fails due to a leak, then the exhaust flow control device will go to the full open 
position. Alarms will be displayed on the ODP indicating unsafe operating conditions. 

If the AO-P module fails, alarms will be displayed on the ODP indicating unsafe operating 
conditions.