Delta Faucet DF-745 Manuel D’Utilisation

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52                                                                           DF-745
User Interface
An alarm warning will overwrite the moisture level readout if an alarm condition exists. To 
acknowledge the alarm simply hit the Enter button and its number or letter will appear in 
the Alarm Status line above the display. See Figure 18. This action will not clear the alarm. 
Only restoration of the condition that existed prior to the alarm will clear the alarm. 
Following is a list of alarm code abbreviations that can appear in the Status Line:
NOTE: When any hydrogen is included in the background gas matrix (see discussion 
regarding GSF on page 49 for additional information), an additional alarm is enabled to 
monitor the cabinet exhaust fan status. If the system detects a failure in the operation of the 
cabinet exhaust fans while operating in a hydrogen background, the system immediately 
isolates the moisture cell until the fan is repaired. A warning describing this condition will 
appear over the main display and the user will be unable to restore gas flow until the fan is 
repaired. See Fan Failure on page 50.
7.4.7.4 Moisture Alarm Setup
Figure 50: Alarm Setup Screen
The Setpoint value refers to the limit above or below which the alarm is triggered.  The Trip 
command sets the above/below parameter.  The deadband refers to the value from the 
nominal setpoint that the output value must exceed before an alarm is reset.  The Relay 
Assignment indicates to which relay the alarm is assigned.
Use the Next key to move from between fields and use the arrow keys (
and 
 to 
change the highlighted selections and to enter numerical values. When done, use the Next
key to move to the Accept button and hit the Enter key to return to the main display. 
Using the ESC key at anytime will exit the screen making no changes and return to the 
main display.