Watlow Series D8 - Manual (Page 178)

Chapter 7: Troubleshooting and Reconfiguring Series D8 User’s Guide
160 Watlow Anafaze Doc. 0600-3120-2000
Responding to a Process Alarm
Your response to an alarm depends upon the alarm function
setting, as explained in Table 7.1.
Table 7.1 Operator Response to Process
Alarms
Ambient Warning
The Ambient Warning indicates that the controller is within
5°C of its operating temperature limits. If an Ambient Warn-
ing occurs, the alarm code AW (flashing) is displayed, and the
global alarm output is turned on. Acknowledging the alarm
turns off the global alarm output. The error clears when the
condition no longer exists and the alarm has been acknowl-
edged.
If the controller displays the AW alarm code:
1. Acknowledge the alarm.
2. Adjust the ambient temperature to a more appropriate level.
Failed Sensor Alarms
When a failed sensor alarm occurs, the controller switches to
the single loop display for the loop with the alarm and displays
an alarm code (see Alarm Displays on page 81).
A failed sensor alarm clears once it has been acknowledged
and the sensor is repaired. For more information about the
causes of failed sensor alarms, see Failed Sensor Alarms on
page 93.
System Alarms
If the controller detects a hardware problem, it displays an
alarm message, and with the exception of the Low Power
Alarm
Function
Operator Response
Boost
The operator does not need to acknowledge
the alarm. The alarm clears automatically
when the process variable returns within lim-
its.
Standard
Acknowledge the alarm by pressing x on
the keypad or via communications. The
alarm clears after the operator acknowl-
edges it and the process variable returns
within the limits.