Watlow Series D8 User Manual
Page 100
Chapter 4: Operation and Setup
Series D8 User’s Guide
82
Watlow Anafaze
Doc. 0600-3120-2000
Table 4.2
Alarm Codes and Messages for
Process and Failed Sensor Alarms
For details about the condition that causes each alarm, see Set-
How to Acknowledge an Alarm
To acknowledge a process alarm, failed sensor alarm or sys-
tem alarm, press x. If there are other loops with alarm condi-
tions, the alarm display switches to the next loop that has an
alarm. Acknowledge all alarms to clear the global alarm digi-
tal output.
The keypad and display will not work for anything else until
you acknowledge each alarm. The alarm code or message per-
sists as long as the alarm condition exists.
System Alarm Messages
If a system alarm occurs, the alarm message replaces the en-
tire display. The message persists until the condition is cor-
rected and the alarm is acknowledged.
Table 4.3 describes system alarm messages. For more infor-
mation, see the Troubleshooting and Reconfiguring chapter.
Alarm
Code
Alarm
Message
Description
AH
(No message)
Alarm high. See Alarm High and Alarm Low on page 96.
AL
(No message)
Alarm low. See Alarm High and Alarm Low on page 96.
HD
(No message)
High deviation alarm. See Deviation Alarms on page 96.
LD
(No message)
Low deviation alarm. See Deviation Alarms on page 96.
AW
(No message)
Ambient Warning: The controller is within 5°C of its operating temper-
ature limits. See Ambient Warning on page 160.
TO
T/C open
Thermocouple open. See Thermocouple Open Alarm on page 94.
TR
T/C reversed
Thermocouple reversed. See Thermocouple Reversed Alarm on
TS
T/C shorted
Thermocouple shorted. See Thermocouple Short Alarm on page 94.
RO
RTD open
RTD open. See RTD Open and RTD Fail Alarms on page 94.
RF
RTD fail
RTD open or shorted. See RTD Open and RTD Fail Alarms on page