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9
Chapter 9: Appendix
Troubleshooting Alarms, Errors and Control Issues
Indication
Description
Alarm won't
Alarm will not clear or
clear or reset
reset with keypad or
digital input
Alarm won't
Alarm will not activate
occur
output
Alarm Error
Alarm state cannot
be determined due to
AL. E 1
lack of sensor input
AL. E 2
AL. E 3
AL. E 4
Alarm Low
Sensor input below
low alarm set point
AL. L 1
AL. L 2
AL. L 3
AL. L 4
Wa t l ow P M LE G AC Y ™ L i mi t C o n t ro l l e r
Possible Cause(s)
• Latching is active
• Alarm set to incorrect out-
put
• Alarm is set to incorrect
source
• Sensor input is out of
alarm set point range
• Alarm set point is incorrect
• Alarm is set to incorrect
type
• Digital input function is in-
correct
• Silencing is active
• Blocking is active
• Alarm is set to incorrect
output
• Alarm is set to incorrect
source
• Alarm set point is incorrect
• Alarm is set to incorrect
type
• Sensor improperly wired or
open
• Incorrect setting of sensor
type
• Calibration corrupt
• Temperature is less than
alarm set point
• Alarm is set to latching and
an alarm occurred in the
past
• Incorrect alarm set point
• Incorrect alarm source
1 0 2
•
•
Corrective Action
• Reset alarm when process
is within range or disable
latching
• Set output to correct alarm
source instance
• Set alarm source to correct
input instance
• Correct cause of sensor in-
put out of alarm range
• Set alarm set point to cor-
rect trip point
• Set alarm to correct type:
process, deviation or power
• Set digital input function
and source instance
• Disable silencing, if re-
quired
• Disable blocking, if required
• Set output to correct alarm
source instance
• Set alarm source to correct
input instance
• Set alarm set point to cor-
rect trip point
• Set alarm to correct type:
process, deviation or power
• Correct wiring or replace
sensor
• Match setting to sensor
used
• Check calibration of con-
troller
• Check cause of under tem-
perature
• Clear latched alarm
• Establish correct alarm set
point
• Set alarm source to proper
setting
A ppe ndi x
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