Watlow F4T Install & Troubleshooting • 33 • Chapter 5 Troubleshooting
Chapter 5: Troubleshooting
5
Indication Description Possible Cause(s) Corrective Action
Alarm won’t
clear or reset
Alarm will not clear
or reset with key-
pad or digital input
• Alarm 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 pro-
cess 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 func-
tion and source instance
Alarm won’t
occur
Alarm will not acti-
vate output
• Alarm silencing is active
• Alarm 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 alarm silencing,
if required
• Disable alarm blocking,
if required
• 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 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 re-
place sensor
• Match setting to sensor
used
• Check calibration of
controller
Anderson-Bolds ~ 216-360-9800
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