Watlow EZ-ZONE
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PMI Controller • 225 • Chapter 11 Appendix
Chapter 11: Appendix
Troubleshooting Alarms, Errors and Control Issues
Indication Description Possible Cause(s) Corrective Action
Alarm won’t
clear or reset
Alarm will not clear
or reset with keypad
or digital input
• Latching is active
• Alarm set to incorrect
output
• Alarm is set to incorrect
source
• Sensor input is out of
alarm set point range
• Alarm set point is incor-
rect
• Alarm is set to incorrect
type
• Digital input function is
incorrect
• Reset alarm when process
is within range or disable
latching
• Set output to correct
alarm source instance
• Set alarm source to cor-
rect input instance
• Correct cause of sensor
input out of alarm range
• Set alarm set point to
correct trip point
• Set alarm to correct
type: process, deviation
or power
• Set digital input function
and source instance
Alarm won’t
occur
Alarm will not acti-
vate output
• Silencing is active
• Blocking is active
• Alarm is set to incorrect
output
• Alarm is set to incorrect
source
• Alarm set point is incor-
rect
• Alarm is set to incorrect
type
• Disable silencing, if re-
quired
• Disable blocking, if re-
quired
• Set output to correct
alarm source instance
• Set alarm source to cor-
rect input instance
• Set alarm set point to
correct trip point
• Set alarm to correct
type: process, deviation
or power
Alarm Error
AL.E1
AL.E2
AL.E3
AL.E4
Alarm state cannot
be determined due
to lack of sensor
input
• Sensor improperly wired
or open
• Incorrect setting of sen-
sor type
• Calibration corrupt
• Correct wiring or replace
sensor
• Match setting to sensor
used
• Check calibration of con-
troller
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